Merge branch 'android-4.9' into amlogic-4.9-dev

Makefile

@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 9
-SUBLEVEL = 46
+SUBLEVEL = 50
 EXTRAVERSION =
 NAME = Roaring Lionus
 

arch/alpha/include/asm/types.h

@@ -1,6 +1,6 @@
 #ifndef _ALPHA_TYPES_H
 #define _ALPHA_TYPES_H
 
-#include <asm-generic/int-ll64.h>
+#include <uapi/asm/types.h>
 
 #endif /* _ALPHA_TYPES_H */

arch/alpha/include/uapi/asm/types.h

@@ -9,8 +9,18 @@
  * need to be careful to avoid a name clashes.
  */
 
-#ifndef __KERNEL__
+/*
+ * This is here because we used to use l64 for alpha
+ * and we don't want to impact user mode with our change to ll64
+ * in the kernel.
+ *
+ * However, some user programs are fine with this.  They can
+ * flag __SANE_USERSPACE_TYPES__ to get int-ll64.h here.
+ */
+#if !defined(__SANE_USERSPACE_TYPES__) && !defined(__KERNEL__)
 #include <asm-generic/int-l64.h>
+#else
+#include <asm-generic/int-ll64.h>
 #endif
 
 #endif /* _UAPI_ALPHA_TYPES_H */

arch/arm/kvm/mmu.c

@@ -829,22 +829,22 @@ void stage2_unmap_vm(struct kvm *kvm)
  * Walks the level-1 page table pointed to by kvm->arch.pgd and frees all
  * underlying level-2 and level-3 tables before freeing the actual level-1 table
  * and setting the struct pointer to NULL.
- *
- * Note we don't need locking here as this is only called when the VM is
- * destroyed, which can only be done once.
  */
 void kvm_free_stage2_pgd(struct kvm *kvm)
 {
-	if (kvm->arch.pgd == NULL)
-		return;
+	void *pgd = NULL;
 
 	spin_lock(&kvm->mmu_lock);
-	unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
+	if (kvm->arch.pgd) {
+		unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
+		pgd = READ_ONCE(kvm->arch.pgd);
+		kvm->arch.pgd = NULL;
+	}
 	spin_unlock(&kvm->mmu_lock);
 
 	/* Free the HW pgd, one page at a time */
-	free_pages_exact(kvm->arch.pgd, S2_PGD_SIZE);
-	kvm->arch.pgd = NULL;
+	if (pgd)
+		free_pages_exact(pgd, S2_PGD_SIZE);
 }
 
 static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,

arch/arm/mm/fault.c

@@ -314,8 +314,11 @@ retry:
 	 * signal first. We do not need to release the mmap_sem because
 	 * it would already be released in __lock_page_or_retry in
 	 * mm/filemap.c. */
-	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) {
+		if (!user_mode(regs))
+			goto no_context;
 		return 0;
+	}
 
 	/*
 	 * Major/minor page fault accounting is only done on the

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -170,6 +170,7 @@
 				interrupt-controller;
 				reg = <0x1d00000 0x10000>, /* GICD */
 				      <0x1d40000 0x40000>; /* GICR */
+				interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
 			};
 		};
 

arch/arm64/kernel/fpsimd.c

@@ -157,9 +157,11 @@ void fpsimd_thread_switch(struct task_struct *next)
 
 void fpsimd_flush_thread(void)
 {
+	preempt_disable();
 	memset(&current->thread.fpsimd_state, 0, sizeof(struct fpsimd_state));
 	fpsimd_flush_task_state(current);
 	set_thread_flag(TIF_FOREIGN_FPSTATE);
+	preempt_enable();
 }
 
 /*

arch/arm64/mm/fault.c

@@ -379,8 +379,11 @@ retry:
 	 * signal first. We do not need to release the mmap_sem because it
 	 * would already be released in __lock_page_or_retry in mm/filemap.c.
 	 */
-	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) {
+		if (!user_mode(regs))
+			goto no_context;
 		return 0;
+	}
 
 	/*
 	 * Major/minor page fault accounting is only done on the initial

arch/s390/include/asm/pgtable.h

@@ -480,7 +480,7 @@ static inline int mm_alloc_pgste(struct mm_struct *mm)
  * In the case that a guest uses storage keys
  * faults should no longer be backed by zero pages
  */
-#define mm_forbids_zeropage mm_use_skey
+#define mm_forbids_zeropage mm_has_pgste
 static inline int mm_use_skey(struct mm_struct *mm)
 {
 #ifdef CONFIG_PGSTE

arch/s390/mm/gmap.c

@@ -2124,6 +2124,37 @@ static inline void thp_split_mm(struct mm_struct *mm)
 #endif
 }
 
+/*
+ * Remove all empty zero pages from the mapping for lazy refaulting
+ * - This must be called after mm->context.has_pgste is set, to avoid
+ *   future creation of zero pages
+ * - This must be called after THP was enabled
+ */
+static int __zap_zero_pages(pmd_t *pmd, unsigned long start,
+			   unsigned long end, struct mm_walk *walk)
+{
+	unsigned long addr;
+
+	for (addr = start; addr != end; addr += PAGE_SIZE) {
+		pte_t *ptep;
+		spinlock_t *ptl;
+
+		ptep = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+		if (is_zero_pfn(pte_pfn(*ptep)))
+			ptep_xchg_direct(walk->mm, addr, ptep, __pte(_PAGE_INVALID));
+		pte_unmap_unlock(ptep, ptl);
+	}
+	return 0;
+}
+
+static inline void zap_zero_pages(struct mm_struct *mm)
+{
+	struct mm_walk walk = { .pmd_entry = __zap_zero_pages };
+
+	walk.mm = mm;
+	walk_page_range(0, TASK_SIZE, &walk);
+}
+
 /*
  * switch on pgstes for its userspace process (for kvm)
  */
@@ -2141,6 +2172,7 @@ int s390_enable_sie(void)
 	mm->context.has_pgste = 1;
 	/* split thp mappings and disable thp for future mappings */
 	thp_split_mm(mm);
+	zap_zero_pages(mm);
 	up_write(&mm->mmap_sem);
 	return 0;
 }
@@ -2153,13 +2185,6 @@ EXPORT_SYMBOL_GPL(s390_enable_sie);
 static int __s390_enable_skey(pte_t *pte, unsigned long addr,
 			      unsigned long next, struct mm_walk *walk)
 {
-	/*
-	 * Remove all zero page mappings,
-	 * after establishing a policy to forbid zero page mappings
-	 * following faults for that page will get fresh anonymous pages
-	 */
-	if (is_zero_pfn(pte_pfn(*pte)))
-		ptep_xchg_direct(walk->mm, addr, pte, __pte(_PAGE_INVALID));
 	/* Clear storage key */
 	ptep_zap_key(walk->mm, addr, pte);
 	return 0;

arch/x86/include/asm/io.h

@@ -304,13 +304,13 @@ static inline unsigned type in##bwl##_p(int port)			\
 static inline void outs##bwl(int port, const void *addr, unsigned long count) \
 {									\
 	asm volatile("rep; outs" #bwl					\
-		     : "+S"(addr), "+c"(count) : "d"(port));		\
+		     : "+S"(addr), "+c"(count) : "d"(port) : "memory");	\
 }									\
 									\
 static inline void ins##bwl(int port, void *addr, unsigned long count)	\
 {									\
 	asm volatile("rep; ins" #bwl					\
-		     : "+D"(addr), "+c"(count) : "d"(port));		\
+		     : "+D"(addr), "+c"(count) : "d"(port) : "memory");	\
 }
 
 BUILDIO(b, b, char)

crypto/algif_skcipher.c

@@ -86,8 +86,13 @@ static void skcipher_free_async_sgls(struct skcipher_async_req *sreq)
 	}
 	sgl = sreq->tsg;
 	n = sg_nents(sgl);
-	for_each_sg(sgl, sg, n, i)
-		put_page(sg_page(sg));
+	for_each_sg(sgl, sg, n, i) {
+		struct page *page = sg_page(sg);
+
+		/* some SGs may not have a page mapped */
+		if (page && page_ref_count(page))
+			put_page(page);
+	}
 
 	kfree(sreq->tsg);
 }

drivers/android/Kconfig

@@ -44,6 +44,16 @@ config ANDROID_BINDER_IPC_32BIT
 
 	  Note that enabling this will break newer Android user-space.
 
+config ANDROID_BINDER_IPC_SELFTEST
+	bool "Android Binder IPC Driver Selftest"
+	depends on ANDROID_BINDER_IPC
+	---help---
+	  This feature allows binder selftest to run.
+
+	  Binder selftest checks the allocation and free of binder buffers
+	  exhaustively with combinations of various buffer sizes and
+	  alignments.
+
 endif # if ANDROID
 
 endmenu

drivers/android/Makefile

@@ -1,3 +1,4 @@
 ccflags-y += -I$(src)			# needed for trace events
 
 obj-$(CONFIG_ANDROID_BINDER_IPC)	+= binder.o binder_alloc.o
+obj-$(CONFIG_ANDROID_BINDER_IPC_SELFTEST) += binder_alloc_selftest.o

drivers/android/binder.c

@@ -2480,7 +2480,6 @@ static int binder_translate_handle(struct flat_binder_object *fp,
 			     (u64)node->ptr);
 		binder_node_unlock(node);
 	} else {
-		int ret;
 		struct binder_ref_data dest_rdata;
 
 		binder_node_unlock(node);
@@ -3252,6 +3251,7 @@ static void binder_transaction(struct binder_proc *proc,
 err_dead_proc_or_thread:
 	return_error = BR_DEAD_REPLY;
 	return_error_line = __LINE__;
+	binder_dequeue_work(proc, tcomplete);
 err_translate_failed:
 err_bad_object_type:
 err_bad_offset:
@@ -4579,6 +4579,8 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	/*pr_info("binder_ioctl: %d:%d %x %lx\n",
 			proc->pid, current->pid, cmd, arg);*/
 
+	binder_selftest_alloc(&proc->alloc);
+
 	trace_binder_ioctl(cmd, arg);
 
 	ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
@@ -5424,6 +5426,8 @@ static void print_binder_proc_stats(struct seq_file *m,
 	count = binder_alloc_get_allocated_count(&proc->alloc);
 	seq_printf(m, "  buffers: %d\n", count);
 
+	binder_alloc_print_pages(m, &proc->alloc);
+
 	count = 0;
 	binder_inner_proc_lock(proc);
 	list_for_each_entry(w, &proc->todo, entry) {
@@ -5620,6 +5624,8 @@ static int __init binder_init(void)
 	struct binder_device *device;
 	struct hlist_node *tmp;
 
+	binder_alloc_shrinker_init();
+
 	atomic_set(&binder_transaction_log.cur, ~0U);
 	atomic_set(&binder_transaction_log_failed.cur, ~0U);
 

drivers/android/binder_alloc.c

@@ -27,9 +27,12 @@
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
+#include <linux/list_lru.h>
 #include "binder_alloc.h"
 #include "binder_trace.h"
 
+struct list_lru binder_alloc_lru;
+
 static DEFINE_MUTEX(binder_alloc_mmap_lock);
 
 enum {
@@ -48,14 +51,23 @@ module_param_named(debug_mask, binder_alloc_debug_mask,
 			pr_info(x); \
 	} while (0)
 
+static struct binder_buffer *binder_buffer_next(struct binder_buffer *buffer)
+{
+	return list_entry(buffer->entry.next, struct binder_buffer, entry);
+}
+
+static struct binder_buffer *binder_buffer_prev(struct binder_buffer *buffer)
+{
+	return list_entry(buffer->entry.prev, struct binder_buffer, entry);
+}
+
 static size_t binder_alloc_buffer_size(struct binder_alloc *alloc,
 				       struct binder_buffer *buffer)
 {
 	if (list_is_last(&buffer->entry, &alloc->buffers))
-		return alloc->buffer +
-		       alloc->buffer_size - (void *)buffer->data;
-	return (size_t)list_entry(buffer->entry.next,
-			  struct binder_buffer, entry) - (size_t)buffer->data;
+		return (u8 *)alloc->buffer +
+			alloc->buffer_size - (u8 *)buffer->data;
+	return (u8 *)binder_buffer_next(buffer)->data - (u8 *)buffer->data;
 }
 
 static void binder_insert_free_buffer(struct binder_alloc *alloc,
@@ -105,9 +117,9 @@ static void binder_insert_allocated_buffer_locked(
 		buffer = rb_entry(parent, struct binder_buffer, rb_node);
 		BUG_ON(buffer->free);
 
-		if (new_buffer < buffer)
+		if (new_buffer->data < buffer->data)
 			p = &parent->rb_left;
-		else if (new_buffer > buffer)
+		else if (new_buffer->data > buffer->data)
 			p = &parent->rb_right;
 		else
 			BUG();
@@ -122,18 +134,17 @@ static struct binder_buffer *binder_alloc_prepare_to_free_locked(
 {
 	struct rb_node *n = alloc->allocated_buffers.rb_node;
 	struct binder_buffer *buffer;
-	struct binder_buffer *kern_ptr;
+	void *kern_ptr;
 
-	kern_ptr = (struct binder_buffer *)(user_ptr - alloc->user_buffer_offset
-		- offsetof(struct binder_buffer, data));
+	kern_ptr = (void *)(user_ptr - alloc->user_buffer_offset);
 
 	while (n) {
 		buffer = rb_entry(n, struct binder_buffer, rb_node);
 		BUG_ON(buffer->free);
 
-		if (kern_ptr < buffer)
+		if (kern_ptr < buffer->data)
 			n = n->rb_left;
-		else if (kern_ptr > buffer)
+		else if (kern_ptr > buffer->data)
 			n = n->rb_right;
 		else {
 			/*
@@ -180,8 +191,9 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 {
 	void *page_addr;
 	unsigned long user_page_addr;
-	struct page **page;
-	struct mm_struct *mm;
+	struct binder_lru_page *page;
+	struct mm_struct *mm = NULL;
+	bool need_mm = false;
 
 	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
 		     "%d: %s pages %pK-%pK\n", alloc->pid,
@@ -192,9 +204,18 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 
 	trace_binder_update_page_range(alloc, allocate, start, end);
 
-	if (vma)
-		mm = NULL;
-	else
+	if (allocate == 0)
+		goto free_range;
+
+	for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
+		page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
+		if (!page->page_ptr) {
+			need_mm = true;
+			break;
+		}
+	}
+
+	if (!vma && need_mm)
 		mm = get_task_mm(alloc->tsk);
 
 	if (mm) {
@@ -207,10 +228,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 		}
 	}
 
-	if (allocate == 0)
-		goto free_range;
-
-	if (vma == NULL) {
+	if (!vma && need_mm) {
 		pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
 			alloc->pid);
 		goto err_no_vma;
@@ -218,18 +236,40 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 
 	for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
 		int ret;
+		bool on_lru;
+		size_t index;
 
-		page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
+		index = (page_addr - alloc->buffer) / PAGE_SIZE;
+		page = &alloc->pages[index];
 
-		BUG_ON(*page);
-		*page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
-		if (*page == NULL) {
+		if (page->page_ptr) {
+			trace_binder_alloc_lru_start(alloc, index);
+
+			on_lru = list_lru_del(&binder_alloc_lru, &page->lru);
+			WARN_ON(!on_lru);
+
+			trace_binder_alloc_lru_end(alloc, index);
+			continue;
+		}
+
+		if (WARN_ON(!vma))
+			goto err_page_ptr_cleared;
+
+		trace_binder_alloc_page_start(alloc, index);
+		page->page_ptr = alloc_page(GFP_KERNEL |
+					    __GFP_HIGHMEM |
+					    __GFP_ZERO);
+		if (!page->page_ptr) {
 			pr_err("%d: binder_alloc_buf failed for page at %pK\n",
 				alloc->pid, page_addr);
 			goto err_alloc_page_failed;
 		}
+		page->alloc = alloc;
+		INIT_LIST_HEAD(&page->lru);
+
 		ret = map_kernel_range_noflush((unsigned long)page_addr,
-					PAGE_SIZE, PAGE_KERNEL, page);
+					       PAGE_SIZE, PAGE_KERNEL,
+					       &page->page_ptr);
 		flush_cache_vmap((unsigned long)page_addr,
 				(unsigned long)page_addr + PAGE_SIZE);
 		if (ret != 1) {
@@ -239,12 +279,14 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 		}
 		user_page_addr =
 			(uintptr_t)page_addr + alloc->user_buffer_offset;
-		ret = vm_insert_page(vma, user_page_addr, page[0]);
+		ret = vm_insert_page(vma, user_page_addr, page[0].page_ptr);
 		if (ret) {
 			pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
 			       alloc->pid, user_page_addr);
 			goto err_vm_insert_page_failed;
 		}
+
+		trace_binder_alloc_page_end(alloc, index);
 		/* vm_insert_page does not seem to increment the refcount */
 	}
 	if (mm) {
@@ -256,16 +298,27 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
 free_range:
 	for (page_addr = end - PAGE_SIZE; page_addr >= start;
 	     page_addr -= PAGE_SIZE) {
-		page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
-		if (vma)
-			zap_page_range(vma, (uintptr_t)page_addr +
-				alloc->user_buffer_offset, PAGE_SIZE, NULL);
+		bool ret;
+		size_t index;
+
+		index = (page_addr - alloc->buffer) / PAGE_SIZE;
+		page = &alloc->pages[index];
+
+		trace_binder_free_lru_start(alloc, index);
+
+		ret = list_lru_add(&binder_alloc_lru, &page->lru);
+		WARN_ON(!ret);
+
+		trace_binder_free_lru_end(alloc, index);
+		continue;
+
 err_vm_insert_page_failed:
 		unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
 err_map_kernel_failed:
-		__free_page(*page);
-		*page = NULL;
+		__free_page(page->page_ptr);
+		page->page_ptr = NULL;
 err_alloc_page_failed:
+err_page_ptr_cleared:
 		;
 	}
 err_no_vma:
@@ -321,6 +374,9 @@ struct binder_buffer *binder_alloc_new_buf_locked(struct binder_alloc *alloc,
 		return ERR_PTR(-ENOSPC);
 	}
 
+	/* Pad 0-size buffers so they get assigned unique addresses */
+	size = max(size, sizeof(void *));
+
 	while (n) {
 		buffer = rb_entry(n, struct binder_buffer, rb_node);
 		BUG_ON(!buffer->free);
@@ -380,14 +436,9 @@ struct binder_buffer *binder_alloc_new_buf_locked(struct binder_alloc *alloc,
 
 	has_page_addr =
 		(void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
-	if (n == NULL) {
-		if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
-			buffer_size = size; /* no room for other buffers */
-		else
-			buffer_size = size + sizeof(struct binder_buffer);
-	}
+	WARN_ON(n && buffer_size != size);
 	end_page_addr =
-		(void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
+		(void *)PAGE_ALIGN((uintptr_t)buffer->data + size);
 	if (end_page_addr > has_page_addr)
 		end_page_addr = has_page_addr;
 	ret = binder_update_page_range(alloc, 1,
@@ -395,17 +446,25 @@ struct binder_buffer *binder_alloc_new_buf_locked(struct binder_alloc *alloc,
 	if (ret)
 		return ERR_PTR(ret);
 
-	rb_erase(best_fit, &alloc->free_buffers);
-	buffer->free = 0;
-	buffer->free_in_progress = 0;
-	binder_insert_allocated_buffer_locked(alloc, buffer);
 	if (buffer_size != size) {
-		struct binder_buffer *new_buffer = (void *)buffer->data + size;
+		struct binder_buffer *new_buffer;
 
+		new_buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
+		if (!new_buffer) {
+			pr_err("%s: %d failed to alloc new buffer struct\n",
+			       __func__, alloc->pid);
+			goto err_alloc_buf_struct_failed;
+		}
+		new_buffer->data = (u8 *)buffer->data + size;
 		list_add(&new_buffer->entry, &buffer->entry);
 		new_buffer->free = 1;
 		binder_insert_free_buffer(alloc, new_buffer);
 	}
+
+	rb_erase(best_fit, &alloc->free_buffers);
+	buffer->free = 0;
+	buffer->free_in_progress = 0;
+	binder_insert_allocated_buffer_locked(alloc, buffer);
 	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
 		     "%d: binder_alloc_buf size %zd got %pK\n",
 		      alloc->pid, size, buffer);
@@ -420,6 +479,12 @@ struct binder_buffer *binder_alloc_new_buf_locked(struct binder_alloc *alloc,
 			      alloc->pid, size, alloc->free_async_space);
 	}
 	return buffer;
+
+err_alloc_buf_struct_failed:
+	binder_update_page_range(alloc, 0,
+				 (void *)PAGE_ALIGN((uintptr_t)buffer->data),
+				 end_page_addr, NULL);
+	return ERR_PTR(-ENOMEM);
 }
 
 /**
@@ -454,57 +519,59 @@ struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc,
 
 static void *buffer_start_page(struct binder_buffer *buffer)
 {
-	return (void *)((uintptr_t)buffer & PAGE_MASK);
+	return (void *)((uintptr_t)buffer->data & PAGE_MASK);
 }
 
-static void *buffer_end_page(struct binder_buffer *buffer)
+static void *prev_buffer_end_page(struct binder_buffer *buffer)
 {
-	return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
+	return (void *)(((uintptr_t)(buffer->data) - 1) & PAGE_MASK);
 }
 
 static void binder_delete_free_buffer(struct binder_alloc *alloc,
 				      struct binder_buffer *buffer)
 {
 	struct binder_buffer *prev, *next = NULL;
-	int free_page_end = 1;
-	int free_page_start = 1;
-
+	bool to_free = true;
 	BUG_ON(alloc->buffers.next == &buffer->entry);
-	prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
+	prev = binder_buffer_prev(buffer);
 	BUG_ON(!prev->free);
-	if (buffer_end_page(prev) == buffer_start_page(buffer)) {
-		free_page_start = 0;
-		if (buffer_end_page(prev) == buffer_end_page(buffer))
-			free_page_end = 0;
+	if (prev_buffer_end_page(prev) == buffer_start_page(buffer)) {
+		to_free = false;
 		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-			     "%d: merge free, buffer %pK share page with %pK\n",
-			      alloc->pid, buffer, prev);
+				   "%d: merge free, buffer %pK share page with %pK\n",
+				   alloc->pid, buffer->data, prev->data);
 	}
 
 	if (!list_is_last(&buffer->entry, &alloc->buffers)) {
-		next = list_entry(buffer->entry.next,
-				  struct binder_buffer, entry);
-		if (buffer_start_page(next) == buffer_end_page(buffer)) {
-			free_page_end = 0;
-			if (buffer_start_page(next) ==
-			    buffer_start_page(buffer))
-				free_page_start = 0;
+		next = binder_buffer_next(buffer);
+		if (buffer_start_page(next) == buffer_start_page(buffer)) {
+			to_free = false;
 			binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				     "%d: merge free, buffer %pK share page with %pK\n",
-				      alloc->pid, buffer, prev);
+					   "%d: merge free, buffer %pK share page with %pK\n",
+					   alloc->pid,
+					   buffer->data,
+					   next->data);
 		}
 	}
-	list_del(&buffer->entry);
-	if (free_page_start || free_page_end) {
+
+	if (PAGE_ALIGNED(buffer->data)) {
 		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-			     "%d: merge free, buffer %pK do not share page%s%s with %pK or %pK\n",
-			     alloc->pid, buffer, free_page_start ? "" : " end",
-			     free_page_end ? "" : " start", prev, next);
-		binder_update_page_range(alloc, 0, free_page_start ?
-			buffer_start_page(buffer) : buffer_end_page(buffer),
-			(free_page_end ? buffer_end_page(buffer) :
-			buffer_start_page(buffer)) + PAGE_SIZE, NULL);
+				   "%d: merge free, buffer start %pK is page aligned\n",
+				   alloc->pid, buffer->data);
+		to_free = false;
 	}
+
+	if (to_free) {
+		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
+				   "%d: merge free, buffer %pK do not share page with %pK or %pK\n",
+				   alloc->pid, buffer->data,
+				   prev->data, next->data);
+		binder_update_page_range(alloc, 0, buffer_start_page(buffer),
+					 buffer_start_page(buffer) + PAGE_SIZE,
+					 NULL);
+	}
+	list_del(&buffer->entry);
+	kfree(buffer);
 }
 
 static void binder_free_buf_locked(struct binder_alloc *alloc,
@@ -525,8 +592,8 @@ static void binder_free_buf_locked(struct binder_alloc *alloc,
 	BUG_ON(buffer->free);
 	BUG_ON(size > buffer_size);
 	BUG_ON(buffer->transaction != NULL);
-	BUG_ON((void *)buffer < alloc->buffer);
-	BUG_ON((void *)buffer > alloc->buffer + alloc->buffer_size);
+	BUG_ON(buffer->data < alloc->buffer);
+	BUG_ON(buffer->data > alloc->buffer + alloc->buffer_size);
 
 	if (buffer->async_transaction) {
 		alloc->free_async_space += size + sizeof(struct binder_buffer);
@@ -544,8 +611,7 @@ static void binder_free_buf_locked(struct binder_alloc *alloc,
 	rb_erase(&buffer->rb_node, &alloc->allocated_buffers);
 	buffer->free = 1;
 	if (!list_is_last(&buffer->entry, &alloc->buffers)) {
-		struct binder_buffer *next = list_entry(buffer->entry.next,
-						struct binder_buffer, entry);
+		struct binder_buffer *next = binder_buffer_next(buffer);
 
 		if (next->free) {
 			rb_erase(&next->rb_node, &alloc->free_buffers);
@@ -553,8 +619,7 @@ static void binder_free_buf_locked(struct binder_alloc *alloc,
 		}
 	}
 	if (alloc->buffers.next != &buffer->entry) {
-		struct binder_buffer *prev = list_entry(buffer->entry.prev,
-						struct binder_buffer, entry);
+		struct binder_buffer *prev = binder_buffer_prev(buffer);
 
 		if (prev->free) {
 			binder_delete_free_buffer(alloc, buffer);
@@ -640,14 +705,14 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
 	}
 	alloc->buffer_size = vma->vm_end - vma->vm_start;
 
-	if (binder_update_page_range(alloc, 1, alloc->buffer,
-				     alloc->buffer + PAGE_SIZE, vma)) {
+	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
+	if (!buffer) {
 		ret = -ENOMEM;
-		failure_string = "alloc small buf";
-		goto err_alloc_small_buf_failed;
+		failure_string = "alloc buffer struct";
+		goto err_alloc_buf_struct_failed;
 	}
-	buffer = alloc->buffer;
-	INIT_LIST_HEAD(&alloc->buffers);
+
+	buffer->data = alloc->buffer;
 	list_add(&buffer->entry, &alloc->buffers);
 	buffer->free = 1;
 	binder_insert_free_buffer(alloc, buffer);
@@ -658,7 +723,7 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
 
 	return 0;
 
-err_alloc_small_buf_failed:
+err_alloc_buf_struct_failed:
 	kfree(alloc->pages);
 	alloc->pages = NULL;
 err_alloc_pages_failed:
@@ -678,14 +743,13 @@ void binder_alloc_deferred_release(struct binder_alloc *alloc)
 {
 	struct rb_node *n;
 	int buffers, page_count;
+	struct binder_buffer *buffer;
 
 	BUG_ON(alloc->vma);
 
 	buffers = 0;
 	mutex_lock(&alloc->mutex);
 	while ((n = rb_first(&alloc->allocated_buffers))) {
-		struct binder_buffer *buffer;
-
 		buffer = rb_entry(n, struct binder_buffer, rb_node);
 
 		/* Transaction should already have been freed */
@@ -695,22 +759,36 @@ void binder_alloc_deferred_release(struct binder_alloc *alloc)
 		buffers++;
 	}
 
+	while (!list_empty(&alloc->buffers)) {
+		buffer = list_first_entry(&alloc->buffers,
+					  struct binder_buffer, entry);
+		WARN_ON(!buffer->free);
+
+		list_del(&buffer->entry);
+		WARN_ON_ONCE(!list_empty(&alloc->buffers));
+		kfree(buffer);
+	}
+
 	page_count = 0;
 	if (alloc->pages) {
 		int i;
 
 		for (i = 0; i < alloc->buffer_size / PAGE_SIZE; i++) {
 			void *page_addr;
+			bool on_lru;
 
-			if (!alloc->pages[i])
+			if (!alloc->pages[i].page_ptr)
 				continue;
 
+			on_lru = list_lru_del(&binder_alloc_lru,
+					      &alloc->pages[i].lru);
 			page_addr = alloc->buffer + i * PAGE_SIZE;
 			binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				     "%s: %d: page %d at %pK not freed\n",
-				     __func__, alloc->pid, i, page_addr);
+				     "%s: %d: page %d at %pK %s\n",
+				     __func__, alloc->pid, i, page_addr,
+				     on_lru ? "on lru" : "active");
 			unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
-			__free_page(alloc->pages[i]);
+			__free_page(alloc->pages[i].page_ptr);
 			page_count++;
 		}
 		kfree(alloc->pages);
@@ -753,6 +831,34 @@ void binder_alloc_print_allocated(struct seq_file *m,
 	mutex_unlock(&alloc->mutex);
 }
 
+/**
+ * binder_alloc_print_pages() - print page usage
+ * @m:     seq_file for output via seq_printf()
+ * @alloc: binder_alloc for this proc
+ */
+void binder_alloc_print_pages(struct seq_file *m,
+			      struct binder_alloc *alloc)
+{
+	struct binder_lru_page *page;
+	int i;
+	int active = 0;
+	int lru = 0;
+	int free = 0;
+
+	mutex_lock(&alloc->mutex);
+	for (i = 0; i < alloc->buffer_size / PAGE_SIZE; i++) {
+		page = &alloc->pages[i];
+		if (!page->page_ptr)
+			free++;
+		else if (list_empty(&page->lru))
+			active++;
+		else
+			lru++;
+	}
+	mutex_unlock(&alloc->mutex);
+	seq_printf(m, "  pages: %d:%d:%d\n", active, lru, free);
+}
+
 /**
  * binder_alloc_get_allocated_count() - return count of buffers
  * @alloc: binder_alloc for this proc
@@ -786,6 +892,102 @@ void binder_alloc_vma_close(struct binder_alloc *alloc)
 	WRITE_ONCE(alloc->vma_vm_mm, NULL);
 }
 
+/**
+ * binder_alloc_free_page() - shrinker callback to free pages
+ * @item:   item to free
+ * @lock:   lock protecting the item
+ * @cb_arg: callback argument
+ *
+ * Called from list_lru_walk() in binder_shrink_scan() to free
+ * up pages when the system is under memory pressure.
+ */
+enum lru_status binder_alloc_free_page(struct list_head *item,
+				       struct list_lru_one *lru,
+				       spinlock_t *lock,
+				       void *cb_arg)
+{
+	struct mm_struct *mm = NULL;
+	struct binder_lru_page *page = container_of(item,
+						    struct binder_lru_page,
+						    lru);
+	struct binder_alloc *alloc;
+	uintptr_t page_addr;
+	size_t index;
+
+	alloc = page->alloc;
+	if (!mutex_trylock(&alloc->mutex))
+		goto err_get_alloc_mutex_failed;
+
+	if (!page->page_ptr)
+		goto err_page_already_freed;
+
+	index = page - alloc->pages;
+	page_addr = (uintptr_t)alloc->buffer + index * PAGE_SIZE;
+	if (alloc->vma) {
+		mm = get_task_mm(alloc->tsk);
+		if (!mm)
+			goto err_get_task_mm_failed;
+		if (!down_write_trylock(&mm->mmap_sem))
+			goto err_down_write_mmap_sem_failed;
+
+		trace_binder_unmap_user_start(alloc, index);
+
+		zap_page_range(alloc->vma,
+			       page_addr +
+			       alloc->user_buffer_offset,
+			       PAGE_SIZE, NULL);
+
+		trace_binder_unmap_user_end(alloc, index);
+
+		up_write(&mm->mmap_sem);
+		mmput(mm);
+	}
+
+	trace_binder_unmap_kernel_start(alloc, index);
+
+	unmap_kernel_range(page_addr, PAGE_SIZE);
+	__free_page(page->page_ptr);
+	page->page_ptr = NULL;
+
+	trace_binder_unmap_kernel_end(alloc, index);
+
+	list_lru_isolate(lru, item);
+
+	mutex_unlock(&alloc->mutex);
+	return LRU_REMOVED;
+
+err_down_write_mmap_sem_failed:
+	mmput(mm);
+err_get_task_mm_failed:
+err_page_already_freed:
+	mutex_unlock(&alloc->mutex);
+err_get_alloc_mutex_failed:
+	return LRU_SKIP;
+}
+
+static unsigned long
+binder_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+	unsigned long ret = list_lru_count(&binder_alloc_lru);
+	return ret;
+}
+
+static unsigned long
+binder_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+	unsigned long ret;
+
+	ret = list_lru_walk(&binder_alloc_lru, binder_alloc_free_page,
+			    NULL, sc->nr_to_scan);
+	return ret;
+}
+
+struct shrinker binder_shrinker = {
+	.count_objects = binder_shrink_count,
+	.scan_objects = binder_shrink_scan,
+	.seeks = DEFAULT_SEEKS,
+};
+
 /**
  * binder_alloc_init() - called by binder_open() for per-proc initialization
  * @alloc: binder_alloc for this proc
@@ -798,5 +1000,11 @@ void binder_alloc_init(struct binder_alloc *alloc)
 	alloc->tsk = current->group_leader;
 	alloc->pid = current->group_leader->pid;
 	mutex_init(&alloc->mutex);
+	INIT_LIST_HEAD(&alloc->buffers);
 }
 
+void binder_alloc_shrinker_init(void)
+{
+	list_lru_init(&binder_alloc_lru);
+	register_shrinker(&binder_shrinker);
+}

drivers/android/binder_alloc.h

@@ -21,7 +21,9 @@
 #include <linux/rtmutex.h>
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
+#include <linux/list_lru.h>
 
+extern struct list_lru binder_alloc_lru;
 struct binder_transaction;
 
 /**
@@ -57,7 +59,19 @@ struct binder_buffer {
 	size_t data_size;
 	size_t offsets_size;
 	size_t extra_buffers_size;
-	uint8_t data[0];
+	void *data;
+};
+
+/**
+ * struct binder_lru_page - page object used for binder shrinker
+ * @page_ptr: pointer to physical page in mmap'd space
+ * @lru:      entry in binder_alloc_lru
+ * @alloc:    binder_alloc for a proc
+ */
+struct binder_lru_page {
+	struct list_head lru;
+	struct page *page_ptr;
+	struct binder_alloc *alloc;
 };
 
 /**
@@ -75,8 +89,7 @@ struct binder_buffer {
  * @allocated_buffers:  rb tree of allocated buffers sorted by address
  * @free_async_space:   VA space available for async buffers. This is
  *                      initialized at mmap time to 1/2 the full VA space
- * @pages:              array of physical page addresses for each
- *                      page of mmap'd space
+ * @pages:              array of binder_lru_page
  * @buffer_size:        size of address space specified via mmap
  * @pid:                pid for associated binder_proc (invariant after init)
  *
@@ -96,18 +109,27 @@ struct binder_alloc {
 	struct rb_root free_buffers;
 	struct rb_root allocated_buffers;
 	size_t free_async_space;
-	struct page **pages;
+	struct binder_lru_page *pages;
 	size_t buffer_size;
 	uint32_t buffer_free;
 	int pid;
 };
 
+#ifdef CONFIG_ANDROID_BINDER_IPC_SELFTEST
+void binder_selftest_alloc(struct binder_alloc *alloc);
+#else
+static inline void binder_selftest_alloc(struct binder_alloc *alloc) {}
+#endif
+enum lru_status binder_alloc_free_page(struct list_head *item,
+				       struct list_lru_one *lru,
+				       spinlock_t *lock, void *cb_arg);
 extern struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc,
 						  size_t data_size,
 						  size_t offsets_size,
 						  size_t extra_buffers_size,
 						  int is_async);
 extern void binder_alloc_init(struct binder_alloc *alloc);
+void binder_alloc_shrinker_init(void);
 extern void binder_alloc_vma_close(struct binder_alloc *alloc);
 extern struct binder_buffer *
 binder_alloc_prepare_to_free(struct binder_alloc *alloc,
@@ -120,6 +142,8 @@ extern void binder_alloc_deferred_release(struct binder_alloc *alloc);
 extern int binder_alloc_get_allocated_count(struct binder_alloc *alloc);
 extern void binder_alloc_print_allocated(struct seq_file *m,
 					 struct binder_alloc *alloc);
+void binder_alloc_print_pages(struct seq_file *m,
+			      struct binder_alloc *alloc);
 
 /**
  * binder_alloc_get_free_async_space() - get free space available for async

drivers/android/binder_alloc_selftest.c

@@ -0,0 +1,310 @@
+/* binder_alloc_selftest.c
+ *
+ * Android IPC Subsystem
+ *
+ * Copyright (C) 2017 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/mm_types.h>
+#include <linux/err.h>
+#include "binder_alloc.h"
+
+#define BUFFER_NUM 5
+#define BUFFER_MIN_SIZE (PAGE_SIZE / 8)
+
+static bool binder_selftest_run = true;
+static int binder_selftest_failures;
+static DEFINE_MUTEX(binder_selftest_lock);
+
+/**
+ * enum buf_end_align_type - Page alignment of a buffer
+ * end with regard to the end of the previous buffer.
+ *
+ * In the pictures below, buf2 refers to the buffer we
+ * are aligning. buf1 refers to previous buffer by addr.
+ * Symbol [ means the start of a buffer, ] means the end
+ * of a buffer, and | means page boundaries.
+ */
+enum buf_end_align_type {
+	/**
+	 * @SAME_PAGE_UNALIGNED: The end of this buffer is on
+	 * the same page as the end of the previous buffer and
+	 * is not page aligned. Examples:
+	 * buf1 ][ buf2 ][ ...
+	 * buf1 ]|[ buf2 ][ ...
+	 */
+	SAME_PAGE_UNALIGNED = 0,
+	/**
+	 * @SAME_PAGE_ALIGNED: When the end of the previous buffer
+	 * is not page aligned, the end of this buffer is on the
+	 * same page as the end of the previous buffer and is page
+	 * aligned. When the previous buffer is page aligned, the
+	 * end of this buffer is aligned to the next page boundary.
+	 * Examples:
+	 * buf1 ][ buf2 ]| ...
+	 * buf1 ]|[ buf2 ]| ...
+	 */
+	SAME_PAGE_ALIGNED,
+	/**
+	 * @NEXT_PAGE_UNALIGNED: The end of this buffer is on
+	 * the page next to the end of the previous buffer and
+	 * is not page aligned. Examples:
+	 * buf1 ][ buf2 | buf2 ][ ...
+	 * buf1 ]|[ buf2 | buf2 ][ ...
+	 */
+	NEXT_PAGE_UNALIGNED,
+	/**
+	 * @NEXT_PAGE_ALIGNED: The end of this buffer is on
+	 * the page next to the end of the previous buffer and
+	 * is page aligned. Examples:
+	 * buf1 ][ buf2 | buf2 ]| ...
+	 * buf1 ]|[ buf2 | buf2 ]| ...
+	 */
+	NEXT_PAGE_ALIGNED,
+	/**
+	 * @NEXT_NEXT_UNALIGNED: The end of this buffer is on
+	 * the page that follows the page after the end of the
+	 * previous buffer and is not page aligned. Examples:
+	 * buf1 ][ buf2 | buf2 | buf2 ][ ...
+	 * buf1 ]|[ buf2 | buf2 | buf2 ][ ...
+	 */
+	NEXT_NEXT_UNALIGNED,
+	LOOP_END,
+};
+
+static void pr_err_size_seq(size_t *sizes, int *seq)
+{
+	int i;
+
+	pr_err("alloc sizes: ");
+	for (i = 0; i < BUFFER_NUM; i++)
+		pr_cont("[%zu]", sizes[i]);
+	pr_cont("\n");
+	pr_err("free seq: ");
+	for (i = 0; i < BUFFER_NUM; i++)
+		pr_cont("[%d]", seq[i]);
+	pr_cont("\n");
+}
+
+static bool check_buffer_pages_allocated(struct binder_alloc *alloc,
+					 struct binder_buffer *buffer,
+					 size_t size)
+{
+	void *page_addr, *end;
+	int page_index;
+
+	end = (void *)PAGE_ALIGN((uintptr_t)buffer->data + size);
+	page_addr = buffer->data;
+	for (; page_addr < end; page_addr += PAGE_SIZE) {
+		page_index = (page_addr - alloc->buffer) / PAGE_SIZE;
+		if (!alloc->pages[page_index].page_ptr ||
+		    !list_empty(&alloc->pages[page_index].lru)) {
+			pr_err("expect alloc but is %s at page index %d\n",
+			       alloc->pages[page_index].page_ptr ?
+			       "lru" : "free", page_index);
+			return false;
+		}
+	}
+	return true;
+}
+
+static void binder_selftest_alloc_buf(struct binder_alloc *alloc,
+				      struct binder_buffer *buffers[],
+				      size_t *sizes, int *seq)
+{
+	int i;
+
+	for (i = 0; i < BUFFER_NUM; i++) {
+		buffers[i] = binder_alloc_new_buf(alloc, sizes[i], 0, 0, 0);
+		if (IS_ERR(buffers[i]) ||
+		    !check_buffer_pages_allocated(alloc, buffers[i],
+						  sizes[i])) {
+			pr_err_size_seq(sizes, seq);
+			binder_selftest_failures++;
+		}
+	}
+}
+
+static void binder_selftest_free_buf(struct binder_alloc *alloc,
+				     struct binder_buffer *buffers[],
+				     size_t *sizes, int *seq, size_t end)
+{
+	int i;
+
+	for (i = 0; i < BUFFER_NUM; i++)
+		binder_alloc_free_buf(alloc, buffers[seq[i]]);
+
+	for (i = 0; i < end / PAGE_SIZE; i++) {
+		/**
+		 * Error message on a free page can be false positive
+		 * if binder shrinker ran during binder_alloc_free_buf
+		 * calls above.
+		 */
+		if (list_empty(&alloc->pages[i].lru)) {
+			pr_err_size_seq(sizes, seq);
+			pr_err("expect lru but is %s at page index %d\n",
+			       alloc->pages[i].page_ptr ? "alloc" : "free", i);
+			binder_selftest_failures++;
+		}
+	}
+}
+
+static void binder_selftest_free_page(struct binder_alloc *alloc)
+{
+	int i;
+	unsigned long count;
+
+	while ((count = list_lru_count(&binder_alloc_lru))) {
+		list_lru_walk(&binder_alloc_lru, binder_alloc_free_page,
+			      NULL, count);
+	}
+
+	for (i = 0; i < (alloc->buffer_size / PAGE_SIZE); i++) {
+		if (alloc->pages[i].page_ptr) {
+			pr_err("expect free but is %s at page index %d\n",
+			       list_empty(&alloc->pages[i].lru) ?
+			       "alloc" : "lru", i);
+			binder_selftest_failures++;
+		}
+	}
+}
+
+static void binder_selftest_alloc_free(struct binder_alloc *alloc,
+				       size_t *sizes, int *seq, size_t end)
+{
+	struct binder_buffer *buffers[BUFFER_NUM];
+
+	binder_selftest_alloc_buf(alloc, buffers, sizes, seq);
+	binder_selftest_free_buf(alloc, buffers, sizes, seq, end);
+
+	/* Allocate from lru. */
+	binder_selftest_alloc_buf(alloc, buffers, sizes, seq);
+	if (list_lru_count(&binder_alloc_lru))
+		pr_err("lru list should be empty but is not\n");
+
+	binder_selftest_free_buf(alloc, buffers, sizes, seq, end);
+	binder_selftest_free_page(alloc);
+}
+
+static bool is_dup(int *seq, int index, int val)
+{
+	int i;
+
+	for (i = 0; i < index; i++) {
+		if (seq[i] == val)
+			return true;
+	}
+	return false;
+}
+
+/* Generate BUFFER_NUM factorial free orders. */
+static void binder_selftest_free_seq(struct binder_alloc *alloc,
+				     size_t *sizes, int *seq,
+				     int index, size_t end)
+{
+	int i;
+
+	if (index == BUFFER_NUM) {
+		binder_selftest_alloc_free(alloc, sizes, seq, end);
+		return;
+	}
+	for (i = 0; i < BUFFER_NUM; i++) {
+		if (is_dup(seq, index, i))
+			continue;
+		seq[index] = i;
+		binder_selftest_free_seq(alloc, sizes, seq, index + 1, end);
+	}
+}
+
+static void binder_selftest_alloc_size(struct binder_alloc *alloc,
+				       size_t *end_offset)
+{
+	int i;
+	int seq[BUFFER_NUM] = {0};
+	size_t front_sizes[BUFFER_NUM];
+	size_t back_sizes[BUFFER_NUM];
+	size_t last_offset, offset = 0;
+
+	for (i = 0; i < BUFFER_NUM; i++) {
+		last_offset = offset;
+		offset = end_offset[i];
+		front_sizes[i] = offset - last_offset;
+		back_sizes[BUFFER_NUM - i - 1] = front_sizes[i];
+	}
+	/*
+	 * Buffers share the first or last few pages.
+	 * Only BUFFER_NUM - 1 buffer sizes are adjustable since
+	 * we need one giant buffer before getting to the last page.
+	 */
+	back_sizes[0] += alloc->buffer_size - end_offset[BUFFER_NUM - 1];
+	binder_selftest_free_seq(alloc, front_sizes, seq, 0,
+				 end_offset[BUFFER_NUM - 1]);
+	binder_selftest_free_seq(alloc, back_sizes, seq, 0, alloc->buffer_size);
+}
+
+static void binder_selftest_alloc_offset(struct binder_alloc *alloc,
+					 size_t *end_offset, int index)
+{
+	int align;
+	size_t end, prev;
+
+	if (index == BUFFER_NUM) {
+		binder_selftest_alloc_size(alloc, end_offset);
+		return;
+	}
+	prev = index == 0 ? 0 : end_offset[index - 1];
+	end = prev;
+
+	BUILD_BUG_ON(BUFFER_MIN_SIZE * BUFFER_NUM >= PAGE_SIZE);
+
+	for (align = SAME_PAGE_UNALIGNED; align < LOOP_END; align++) {
+		if (align % 2)
+			end = ALIGN(end, PAGE_SIZE);
+		else
+			end += BUFFER_MIN_SIZE;
+		end_offset[index] = end;
+		binder_selftest_alloc_offset(alloc, end_offset, index + 1);
+	}
+}
+
+/**
+ * binder_selftest_alloc() - Test alloc and free of buffer pages.
+ * @alloc: Pointer to alloc struct.
+ *
+ * Allocate BUFFER_NUM buffers to cover all page alignment cases,
+ * then free them in all orders possible. Check that pages are
+ * correctly allocated, put onto lru when buffers are freed, and
+ * are freed when binder_alloc_free_page is called.
+ */
+void binder_selftest_alloc(struct binder_alloc *alloc)
+{
+	size_t end_offset[BUFFER_NUM];
+
+	if (!binder_selftest_run)
+		return;
+	mutex_lock(&binder_selftest_lock);
+	if (!binder_selftest_run || !alloc->vma)
+		goto done;
+	pr_info("STARTED\n");
+	binder_selftest_alloc_offset(alloc, end_offset, 0);
+	binder_selftest_run = false;
+	if (binder_selftest_failures > 0)
+		pr_info("%d tests FAILED\n", binder_selftest_failures);
+	else
+		pr_info("PASSED\n");
+
+done:
+	mutex_unlock(&binder_selftest_lock);
+}

drivers/android/binder_trace.h

@@ -291,6 +291,61 @@ TRACE_EVENT(binder_update_page_range,
 		  __entry->offset, __entry->size)
 );
 
+DECLARE_EVENT_CLASS(binder_lru_page_class,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index),
+	TP_STRUCT__entry(
+		__field(int, proc)
+		__field(size_t, page_index)
+	),
+	TP_fast_assign(
+		__entry->proc = alloc->pid;
+		__entry->page_index = page_index;
+	),
+	TP_printk("proc=%d page_index=%zu",
+		  __entry->proc, __entry->page_index)
+);
+
+DEFINE_EVENT(binder_lru_page_class, binder_alloc_lru_start,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_alloc_lru_end,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_free_lru_start,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_free_lru_end,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_alloc_page_start,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_alloc_page_end,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_unmap_user_start,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_unmap_user_end,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_unmap_kernel_start,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
+DEFINE_EVENT(binder_lru_page_class, binder_unmap_kernel_end,
+	TP_PROTO(const struct binder_alloc *alloc, size_t page_index),
+	TP_ARGS(alloc, page_index));
+
 TRACE_EVENT(binder_command,
 	TP_PROTO(uint32_t cmd),
 	TP_ARGS(cmd),

drivers/ata/pata_amd.c

@@ -616,6 +616,7 @@ static const struct pci_device_id amd[] = {
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE),	8 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE),	8 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_IDE),		9 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_DEV_IDE),	9 },
 
 	{ },
 };

drivers/ata/pata_cs5536.c

@@ -289,6 +289,7 @@ static int cs5536_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
 static const struct pci_device_id cs5536[] = {
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_IDE), },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_DEV_IDE), },
 	{ },
 };
 

drivers/base/bus.c

@@ -736,7 +736,7 @@ int bus_add_driver(struct device_driver *drv)
 
 out_unregister:
 	kobject_put(&priv->kobj);
-	kfree(drv->p);
+	/* drv->p is freed in driver_release()  */
 	drv->p = NULL;
 out_put_bus:
 	bus_put(bus);

drivers/bluetooth/btusb.c

@@ -342,6 +342,7 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
 	{ USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
 	{ USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
+	{ USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
 
 	/* Additional Realtek 8821AE Bluetooth devices */
 	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },

drivers/gpu/drm/bridge/adv7511/adv7511.h

@@ -315,6 +315,8 @@ struct adv7511 {
 	bool edid_read;
 
 	wait_queue_head_t wq;
+	struct work_struct hpd_work;
+
 	struct drm_bridge bridge;
 	struct drm_connector connector;
 

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

@@ -402,6 +402,27 @@ static bool adv7511_hpd(struct adv7511 *adv7511)
 	return false;
 }
 
+static void adv7511_hpd_work(struct work_struct *work)
+{
+	struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work);
+	enum drm_connector_status status;
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
+	if (ret < 0)
+		status = connector_status_disconnected;
+	else if (val & ADV7511_STATUS_HPD)
+		status = connector_status_connected;
+	else
+		status = connector_status_disconnected;
+
+	if (adv7511->connector.status != status) {
+		adv7511->connector.status = status;
+		drm_kms_helper_hotplug_event(adv7511->connector.dev);
+	}
+}
+
 static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 {
 	unsigned int irq0, irq1;
@@ -419,7 +440,7 @@ static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
 	regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
 
 	if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
-		drm_helper_hpd_irq_event(adv7511->connector.dev);
+		schedule_work(&adv7511->hpd_work);
 
 	if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
 		adv7511->edid_read = true;
@@ -1006,6 +1027,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 			goto err_i2c_unregister_edid;
 	}
 
+	INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
+
 	if (i2c->irq) {
 		init_waitqueue_head(&adv7511->wq);
 

drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c

@@ -192,6 +192,10 @@ nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
 		}
 	}
 
+#ifdef __BIG_ENDIAN
+	pci->msi = false;
+#endif
+
 	pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
 	if (pci->msi && func->msi_rearm) {
 		pci->msi = pci_enable_msi(pci->pdev) == 0;

drivers/gpu/drm/ttm/ttm_page_alloc.c

@@ -612,7 +612,7 @@ static void ttm_page_pool_fill_locked(struct ttm_page_pool *pool,
 		} else {
 			pr_err("Failed to fill pool (%p)\n", pool);
 			/* If we have any pages left put them to the pool. */
-			list_for_each_entry(p, &pool->list, lru) {
+			list_for_each_entry(p, &new_pages, lru) {
 				++cpages;
 			}
 			list_splice(&new_pages, &pool->list);

drivers/hwtracing/intel_th/pci.c

@@ -85,6 +85,16 @@ static const struct pci_device_id intel_th_pci_id_table[] = {
 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
 		.driver_data = (kernel_ulong_t)0,
 	},
+	{
+		/* Cannon Lake H */
+		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
+		.driver_data = (kernel_ulong_t)0,
+	},
+	{
+		/* Cannon Lake LP */
+		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
+		.driver_data = (kernel_ulong_t)0,
+	},
 	{ 0 },
 };
 

drivers/i2c/busses/i2c-ismt.c

@@ -341,8 +341,10 @@ static int ismt_process_desc(const struct ismt_desc *desc,
 			break;
 		case I2C_SMBUS_BLOCK_DATA:
 		case I2C_SMBUS_I2C_BLOCK_DATA:
-			memcpy(&data->block[1], dma_buffer, desc->rxbytes);
-			data->block[0] = desc->rxbytes;
+			if (desc->rxbytes != dma_buffer[0] + 1)
+				return -EMSGSIZE;
+
+			memcpy(data->block, dma_buffer, desc->rxbytes);
 			break;
 		}
 		return 0;

drivers/iio/adc/ti-ads1015.c

@@ -80,18 +80,12 @@ static const unsigned int ads1115_data_rate[] = {
 	8, 16, 32, 64, 128, 250, 475, 860
 };
 
-static const struct {
-	int scale;
-	int uscale;
-} ads1015_scale[] = {
-	{3, 0},
-	{2, 0},
-	{1, 0},
-	{0, 500000},
-	{0, 250000},
-	{0, 125000},
-	{0, 125000},
-	{0, 125000},
+/*
+ * Translation from PGA bits to full-scale positive and negative input voltage
+ * range in mV
+ */
+static int ads1015_fullscale_range[] = {
+	6144, 4096, 2048, 1024, 512, 256, 256, 256
 };
 
 #define ADS1015_V_CHAN(_chan, _addr) {				\
@@ -182,6 +176,12 @@ struct ads1015_data {
 	struct ads1015_channel_data channel_data[ADS1015_CHANNELS];
 
 	unsigned int *data_rate;
+	/*
+	 * Set to true when the ADC is switched to the continuous-conversion
+	 * mode and exits from a power-down state.  This flag is used to avoid
+	 * getting the stale result from the conversion register.
+	 */
+	bool conv_invalid;
 };
 
 static bool ads1015_is_writeable_reg(struct device *dev, unsigned int reg)
@@ -234,33 +234,43 @@ static int ads1015_set_power_state(struct ads1015_data *data, bool on)
 		ret = pm_runtime_put_autosuspend(dev);
 	}
 
-	return ret;
+	return ret < 0 ? ret : 0;
 }
 
 static
 int ads1015_get_adc_result(struct ads1015_data *data, int chan, int *val)
 {
 	int ret, pga, dr, conv_time;
-	bool change;
+	unsigned int old, mask, cfg;
 
 	if (chan < 0 || chan >= ADS1015_CHANNELS)
 		return -EINVAL;
 
-	pga = data->channel_data[chan].pga;
-	dr = data->channel_data[chan].data_rate;
-
-	ret = regmap_update_bits_check(data->regmap, ADS1015_CFG_REG,
-				       ADS1015_CFG_MUX_MASK |
-				       ADS1015_CFG_PGA_MASK,
-				       chan << ADS1015_CFG_MUX_SHIFT |
-				       pga << ADS1015_CFG_PGA_SHIFT,
-				       &change);
-	if (ret < 0)
+	ret = regmap_read(data->regmap, ADS1015_CFG_REG, &old);
+	if (ret)
 		return ret;
 
-	if (change) {
-		conv_time = DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr]);
+	pga = data->channel_data[chan].pga;
+	dr = data->channel_data[chan].data_rate;
+	mask = ADS1015_CFG_MUX_MASK | ADS1015_CFG_PGA_MASK |
+		ADS1015_CFG_DR_MASK;
+	cfg = chan << ADS1015_CFG_MUX_SHIFT | pga << ADS1015_CFG_PGA_SHIFT |
+		dr << ADS1015_CFG_DR_SHIFT;
+
+	cfg = (old & ~mask) | (cfg & mask);
+
+	ret = regmap_write(data->regmap, ADS1015_CFG_REG, cfg);
+	if (ret)
+		return ret;
+
+	if (old != cfg || data->conv_invalid) {
+		int dr_old = (old & ADS1015_CFG_DR_MASK) >>
+				ADS1015_CFG_DR_SHIFT;
+
+		conv_time = DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr_old]);
+		conv_time += DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr]);
 		usleep_range(conv_time, conv_time + 1);
+		data->conv_invalid = false;
 	}
 
 	return regmap_read(data->regmap, ADS1015_CONV_REG, val);
@@ -297,17 +307,20 @@ err:
 	return IRQ_HANDLED;
 }
 
-static int ads1015_set_scale(struct ads1015_data *data, int chan,
+static int ads1015_set_scale(struct ads1015_data *data,
+			     struct iio_chan_spec const *chan,
 			     int scale, int uscale)
 {
 	int i, ret, rindex = -1;
+	int fullscale = div_s64((scale * 1000000LL + uscale) <<
+				(chan->scan_type.realbits - 1), 1000000);
 
-	for (i = 0; i < ARRAY_SIZE(ads1015_scale); i++)
-		if (ads1015_scale[i].scale == scale &&
-		    ads1015_scale[i].uscale == uscale) {
+	for (i = 0; i < ARRAY_SIZE(ads1015_fullscale_range); i++) {
+		if (ads1015_fullscale_range[i] == fullscale) {
 			rindex = i;
 			break;
 		}
+	}
 	if (rindex < 0)
 		return -EINVAL;
 
@@ -317,32 +330,23 @@ static int ads1015_set_scale(struct ads1015_data *data, int chan,
 	if (ret < 0)
 		return ret;
 
-	data->channel_data[chan].pga = rindex;
+	data->channel_data[chan->address].pga = rindex;
 
 	return 0;
 }
 
 static int ads1015_set_data_rate(struct ads1015_data *data, int chan, int rate)
 {
-	int i, ret, rindex = -1;
+	int i;
 
-	for (i = 0; i < ARRAY_SIZE(ads1015_data_rate); i++)
+	for (i = 0; i < ARRAY_SIZE(ads1015_data_rate); i++) {
 		if (data->data_rate[i] == rate) {
-			rindex = i;
-			break;
+			data->channel_data[chan].data_rate = i;
+			return 0;
 		}
-	if (rindex < 0)
-		return -EINVAL;
+	}
 
-	ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
-				 ADS1015_CFG_DR_MASK,
-				 rindex << ADS1015_CFG_DR_SHIFT);
-	if (ret < 0)
-		return ret;
-
-	data->channel_data[chan].data_rate = rindex;
-
-	return 0;
+	return -EINVAL;
 }
 
 static int ads1015_read_raw(struct iio_dev *indio_dev,
@@ -384,9 +388,9 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,
 	}
 	case IIO_CHAN_INFO_SCALE:
 		idx = data->channel_data[chan->address].pga;
-		*val = ads1015_scale[idx].scale;
-		*val2 = ads1015_scale[idx].uscale;
-		ret = IIO_VAL_INT_PLUS_MICRO;
+		*val = ads1015_fullscale_range[idx];
+		*val2 = chan->scan_type.realbits - 1;
+		ret = IIO_VAL_FRACTIONAL_LOG2;
 		break;
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		idx = data->channel_data[chan->address].data_rate;
@@ -413,7 +417,7 @@ static int ads1015_write_raw(struct iio_dev *indio_dev,
 	mutex_lock(&data->lock);
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
-		ret = ads1015_set_scale(data, chan->address, val, val2);
+		ret = ads1015_set_scale(data, chan, val, val2);
 		break;
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		ret = ads1015_set_data_rate(data, chan->address, val);
@@ -445,7 +449,10 @@ static const struct iio_buffer_setup_ops ads1015_buffer_setup_ops = {
 	.validate_scan_mask = &iio_validate_scan_mask_onehot,
 };
 
-static IIO_CONST_ATTR(scale_available, "3 2 1 0.5 0.25 0.125");
+static IIO_CONST_ATTR_NAMED(ads1015_scale_available, scale_available,
+	"3 2 1 0.5 0.25 0.125");
+static IIO_CONST_ATTR_NAMED(ads1115_scale_available, scale_available,
+	"0.1875 0.125 0.0625 0.03125 0.015625 0.007813");
 
 static IIO_CONST_ATTR_NAMED(ads1015_sampling_frequency_available,
 	sampling_frequency_available, "128 250 490 920 1600 2400 3300");
@@ -453,7 +460,7 @@ static IIO_CONST_ATTR_NAMED(ads1115_sampling_frequency_available,
 	sampling_frequency_available, "8 16 32 64 128 250 475 860");
 
 static struct attribute *ads1015_attributes[] = {
-	&iio_const_attr_scale_available.dev_attr.attr,
+	&iio_const_attr_ads1015_scale_available.dev_attr.attr,
 	&iio_const_attr_ads1015_sampling_frequency_available.dev_attr.attr,
 	NULL,
 };
@@ -463,7 +470,7 @@ static const struct attribute_group ads1015_attribute_group = {
 };
 
 static struct attribute *ads1115_attributes[] = {
-	&iio_const_attr_scale_available.dev_attr.attr,
+	&iio_const_attr_ads1115_scale_available.dev_attr.attr,
 	&iio_const_attr_ads1115_sampling_frequency_available.dev_attr.attr,
 	NULL,
 };
@@ -624,6 +631,15 @@ static int ads1015_probe(struct i2c_client *client,
 		dev_err(&client->dev, "iio triggered buffer setup failed\n");
 		return ret;
 	}
+
+	ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
+				ADS1015_CFG_MOD_MASK,
+				ADS1015_CONTINUOUS << ADS1015_CFG_MOD_SHIFT);
+	if (ret)
+		return ret;
+
+	data->conv_invalid = true;
+
 	ret = pm_runtime_set_active(&client->dev);
 	if (ret)
 		goto err_buffer_cleanup;
@@ -679,10 +695,15 @@ static int ads1015_runtime_resume(struct device *dev)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 	struct ads1015_data *data = iio_priv(indio_dev);
+	int ret;
 
-	return regmap_update_bits(data->regmap, ADS1015_CFG_REG,
+	ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
 				  ADS1015_CFG_MOD_MASK,
 				  ADS1015_CONTINUOUS << ADS1015_CFG_MOD_SHIFT);
+	if (!ret)
+		data->conv_invalid = true;
+
+	return ret;
 }
 #endif
 

drivers/input/mouse/trackpoint.c

@@ -381,8 +381,8 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
 		return 0;
 
 	if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
-		psmouse_warn(psmouse, "failed to get extended button data\n");
-		button_info = 0;
+		psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
+		button_info = 0x33;
 	}
 
 	psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);

drivers/irqchip/irq-mips-gic.c

@@ -1115,8 +1115,11 @@ static int __init gic_of_init(struct device_node *node,
 		gic_len = resource_size(&res);
 	}
 
-	if (mips_cm_present())
+	if (mips_cm_present()) {
 		write_gcr_gic_base(gic_base | CM_GCR_GIC_BASE_GICEN_MSK);
+		/* Ensure GIC region is enabled before trying to access it */
+		__sync();
+	}
 	gic_present = true;
 
 	__gic_init(gic_base, gic_len, cpu_vec, 0, node);

drivers/mcb/mcb-lpc.c

@@ -114,6 +114,12 @@ static struct resource sc24_fpga_resource = {
 	.flags = IORESOURCE_MEM,
 };
 
+static struct resource sc31_fpga_resource = {
+	.start = 0xf000e000,
+	.end = 0xf000e000 + CHAM_HEADER_SIZE,
+	.flags = IORESOURCE_MEM,
+};
+
 static struct platform_driver mcb_lpc_driver = {
 	.driver		= {
 		.name = "mcb-lpc",
@@ -132,6 +138,15 @@ static const struct dmi_system_id mcb_lpc_dmi_table[] = {
 		.driver_data = (void *)&sc24_fpga_resource,
 		.callback = mcb_lpc_create_platform_device,
 	},
+	{
+		.ident = "SC31",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
+		},
+		.driver_data = (void *)&sc31_fpga_resource,
+		.callback = mcb_lpc_create_platform_device,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);

drivers/mtd/nand/mxc_nand.c

@@ -877,6 +877,8 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
 	}
 }
 
+#define MXC_V1_ECCBYTES		5
+
 static int mxc_v1_ooblayout_ecc(struct mtd_info *mtd, int section,
 				struct mtd_oob_region *oobregion)
 {
@@ -886,7 +888,7 @@ static int mxc_v1_ooblayout_ecc(struct mtd_info *mtd, int section,
 		return -ERANGE;
 
 	oobregion->offset = (section * 16) + 6;
-	oobregion->length = nand_chip->ecc.bytes;
+	oobregion->length = MXC_V1_ECCBYTES;
 
 	return 0;
 }
@@ -908,8 +910,7 @@ static int mxc_v1_ooblayout_free(struct mtd_info *mtd, int section,
 			oobregion->length = 4;
 		}
 	} else {
-		oobregion->offset = ((section - 1) * 16) +
-				    nand_chip->ecc.bytes + 6;
+		oobregion->offset = ((section - 1) * 16) + MXC_V1_ECCBYTES + 6;
 		if (section < nand_chip->ecc.steps)
 			oobregion->length = (section * 16) + 6 -
 					    oobregion->offset;

drivers/mtd/nand/qcom_nandc.c

@@ -109,7 +109,11 @@
 #define	READ_ADDR			0
 
 /* NAND_DEV_CMD_VLD bits */
-#define	READ_START_VLD			0
+#define	READ_START_VLD			BIT(0)
+#define	READ_STOP_VLD			BIT(1)
+#define	WRITE_START_VLD			BIT(2)
+#define	ERASE_START_VLD			BIT(3)
+#define	SEQ_READ_START_VLD		BIT(4)
 
 /* NAND_EBI2_ECC_BUF_CFG bits */
 #define	NUM_STEPS			0
@@ -148,6 +152,10 @@
 #define	FETCH_ID			0xb
 #define	RESET_DEVICE			0xd
 
+/* Default Value for NAND_DEV_CMD_VLD */
+#define NAND_DEV_CMD_VLD_VAL		(READ_START_VLD | WRITE_START_VLD | \
+					 ERASE_START_VLD | SEQ_READ_START_VLD)
+
 /*
  * the NAND controller performs reads/writes with ECC in 516 byte chunks.
  * the driver calls the chunks 'step' or 'codeword' interchangeably
@@ -672,8 +680,7 @@ static int nandc_param(struct qcom_nand_host *host)
 
 	/* configure CMD1 and VLD for ONFI param probing */
 	nandc_set_reg(nandc, NAND_DEV_CMD_VLD,
-		      (nandc->vld & ~(1 << READ_START_VLD))
-		      | 0 << READ_START_VLD);
+		      (nandc->vld & ~READ_START_VLD));
 	nandc_set_reg(nandc, NAND_DEV_CMD1,
 		      (nandc->cmd1 & ~(0xFF << READ_ADDR))
 		      | NAND_CMD_PARAM << READ_ADDR);
@@ -1893,7 +1900,7 @@ static int qcom_nand_host_setup(struct qcom_nand_host *host)
 				| wide_bus << WIDE_FLASH
 				| 1 << DEV0_CFG1_ECC_DISABLE;
 
-	host->ecc_bch_cfg = host->bch_enabled << ECC_CFG_ECC_DISABLE
+	host->ecc_bch_cfg = !host->bch_enabled << ECC_CFG_ECC_DISABLE
 				| 0 << ECC_SW_RESET
 				| host->cw_data << ECC_NUM_DATA_BYTES
 				| 1 << ECC_FORCE_CLK_OPEN
@@ -1972,13 +1979,14 @@ static int qcom_nandc_setup(struct qcom_nand_controller *nandc)
 {
 	/* kill onenand */
 	nandc_write(nandc, SFLASHC_BURST_CFG, 0);
+	nandc_write(nandc, NAND_DEV_CMD_VLD, NAND_DEV_CMD_VLD_VAL);
 
 	/* enable ADM DMA */
 	nandc_write(nandc, NAND_FLASH_CHIP_SELECT, DM_EN);
 
 	/* save the original values of these registers */
 	nandc->cmd1 = nandc_read(nandc, NAND_DEV_CMD1);
-	nandc->vld = nandc_read(nandc, NAND_DEV_CMD_VLD);
+	nandc->vld = NAND_DEV_CMD_VLD_VAL;
 
 	return 0;
 }

drivers/net/wireless/ath/ath10k/core.c

@@ -1852,6 +1852,12 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 		goto err_wmi_detach;
 	}
 
+	/* If firmware indicates Full Rx Reorder support it must be used in a
+	 * slightly different manner. Let HTT code know.
+	 */
+	ar->htt.rx_ring.in_ord_rx = !!(test_bit(WMI_SERVICE_RX_FULL_REORDER,
+						ar->wmi.svc_map));
+
 	status = ath10k_htt_rx_alloc(&ar->htt);
 	if (status) {
 		ath10k_err(ar, "failed to alloc htt rx: %d\n", status);
@@ -1964,12 +1970,6 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 		}
 	}
 
-	/* If firmware indicates Full Rx Reorder support it must be used in a
-	 * slightly different manner. Let HTT code know.
-	 */
-	ar->htt.rx_ring.in_ord_rx = !!(test_bit(WMI_SERVICE_RX_FULL_REORDER,
-						ar->wmi.svc_map));
-
 	status = ath10k_htt_rx_ring_refill(ar);
 	if (status) {
 		ath10k_err(ar, "failed to refill htt rx ring: %d\n", status);

drivers/net/wireless/intel/iwlwifi/pcie/drv.c

@@ -429,6 +429,7 @@ static const struct pci_device_id iwl_hw_card_ids[] = {
 	{IWL_PCI_DEVICE(0x095B, 0x520A, iwl7265_2ac_cfg)},
 	{IWL_PCI_DEVICE(0x095A, 0x9000, iwl7265_2ac_cfg)},
 	{IWL_PCI_DEVICE(0x095A, 0x9400, iwl7265_2ac_cfg)},
+	{IWL_PCI_DEVICE(0x095A, 0x9E10, iwl7265_2ac_cfg)},
 
 /* 8000 Series */
 	{IWL_PCI_DEVICE(0x24F3, 0x0010, iwl8260_2ac_cfg)},

drivers/net/wireless/intersil/p54/fwio.c

@@ -488,7 +488,7 @@ int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
 
 			entry += sizeof(__le16);
 			chan->pa_points_per_curve = 8;
-			memset(chan->curve_data, 0, sizeof(*chan->curve_data));
+			memset(chan->curve_data, 0, sizeof(chan->curve_data));
 			memcpy(chan->curve_data, entry,
 			       sizeof(struct p54_pa_curve_data_sample) *
 			       min((u8)8, curve_data->points_per_channel));

drivers/net/wireless/marvell/mwifiex/cfg80211.c

@@ -4188,7 +4188,7 @@ int mwifiex_init_channel_scan_gap(struct mwifiex_adapter *adapter)
 	if (adapter->config_bands & BAND_A)
 		n_channels_a = mwifiex_band_5ghz.n_channels;
 
-	adapter->num_in_chan_stats = max_t(u32, n_channels_bg, n_channels_a);
+	adapter->num_in_chan_stats = n_channels_bg + n_channels_a;
 	adapter->chan_stats = vmalloc(sizeof(*adapter->chan_stats) *
 				      adapter->num_in_chan_stats);
 

drivers/net/wireless/marvell/mwifiex/scan.c

@@ -2479,6 +2479,12 @@ mwifiex_update_chan_statistics(struct mwifiex_private *priv,
 					      sizeof(struct mwifiex_chan_stats);
 
 	for (i = 0 ; i < num_chan; i++) {
+		if (adapter->survey_idx >= adapter->num_in_chan_stats) {
+			mwifiex_dbg(adapter, WARN,
+				    "FW reported too many channel results (max %d)\n",
+				    adapter->num_in_chan_stats);
+			return;
+		}
 		chan_stats.chan_num = fw_chan_stats->chan_num;
 		chan_stats.bandcfg = fw_chan_stats->bandcfg;
 		chan_stats.flags = fw_chan_stats->flags;

drivers/net/wireless/realtek/rtlwifi/pci.c

@@ -2269,7 +2269,7 @@ int rtl_pci_probe(struct pci_dev *pdev,
 	/* find adapter */
 	if (!_rtl_pci_find_adapter(pdev, hw)) {
 		err = -ENODEV;
-		goto fail3;
+		goto fail2;
 	}
 
 	/* Init IO handler */
@@ -2339,10 +2339,10 @@ fail3:
 	pci_set_drvdata(pdev, NULL);
 	rtl_deinit_core(hw);
 
+fail2:
 	if (rtlpriv->io.pci_mem_start != 0)
 		pci_iounmap(pdev, (void __iomem *)rtlpriv->io.pci_mem_start);
 
-fail2:
 	pci_release_regions(pdev);
 	complete(&rtlpriv->firmware_loading_complete);
 

drivers/net/wireless/ti/wl1251/main.c

@@ -1571,6 +1571,7 @@ struct ieee80211_hw *wl1251_alloc_hw(void)
 
 	wl->state = WL1251_STATE_OFF;
 	mutex_init(&wl->mutex);
+	spin_lock_init(&wl->wl_lock);
 
 	wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
 	wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;

drivers/nvme/host/fabrics.c

@@ -77,7 +77,7 @@ static struct nvmf_host *nvmf_host_default(void)
 	kref_init(&host->ref);
 	uuid_be_gen(&host->id);
 	snprintf(host->nqn, NVMF_NQN_SIZE,
-		"nqn.2014-08.org.nvmexpress:NVMf:uuid:%pUb", &host->id);
+		"nqn.2014-08.org.nvmexpress:uuid:%pUb", &host->id);
 
 	mutex_lock(&nvmf_hosts_mutex);
 	list_add_tail(&host->list, &nvmf_hosts);

drivers/scsi/isci/remote_node_context.c

@@ -66,6 +66,9 @@ const char *rnc_state_name(enum scis_sds_remote_node_context_states state)
 {
 	static const char * const strings[] = RNC_STATES;
 
+	if (state >= ARRAY_SIZE(strings))
+		return "UNKNOWN";
+
 	return strings[state];
 }
 #undef C

drivers/scsi/sg.c

@@ -142,6 +142,7 @@ typedef struct sg_fd {		/* holds the state of a file descriptor */
 	struct sg_device *parentdp;	/* owning device */
 	wait_queue_head_t read_wait;	/* queue read until command done */
 	rwlock_t rq_list_lock;	/* protect access to list in req_arr */
+	struct mutex f_mutex;	/* protect against changes in this fd */
 	int timeout;		/* defaults to SG_DEFAULT_TIMEOUT      */
 	int timeout_user;	/* defaults to SG_DEFAULT_TIMEOUT_USER */
 	Sg_scatter_hold reserve;	/* buffer held for this file descriptor */
@@ -155,6 +156,7 @@ typedef struct sg_fd {		/* holds the state of a file descriptor */
 	unsigned char next_cmd_len; /* 0: automatic, >0: use on next write() */
 	char keep_orphan;	/* 0 -> drop orphan (def), 1 -> keep for read() */
 	char mmap_called;	/* 0 -> mmap() never called on this fd */
+	char res_in_use;	/* 1 -> 'reserve' array in use */
 	struct kref f_ref;
 	struct execute_work ew;
 } Sg_fd;
@@ -198,7 +200,6 @@ static void sg_remove_sfp(struct kref *);
 static Sg_request *sg_get_rq_mark(Sg_fd * sfp, int pack_id);
 static Sg_request *sg_add_request(Sg_fd * sfp);
 static int sg_remove_request(Sg_fd * sfp, Sg_request * srp);
-static int sg_res_in_use(Sg_fd * sfp);
 static Sg_device *sg_get_dev(int dev);
 static void sg_device_destroy(struct kref *kref);
 
@@ -614,6 +615,7 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
 	}
 	buf += SZ_SG_HEADER;
 	__get_user(opcode, buf);
+	mutex_lock(&sfp->f_mutex);
 	if (sfp->next_cmd_len > 0) {
 		cmd_size = sfp->next_cmd_len;
 		sfp->next_cmd_len = 0;	/* reset so only this write() effected */
@@ -622,6 +624,7 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
 		if ((opcode >= 0xc0) && old_hdr.twelve_byte)
 			cmd_size = 12;
 	}
+	mutex_unlock(&sfp->f_mutex);
 	SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sdp,
 		"sg_write:   scsi opcode=0x%02x, cmd_size=%d\n", (int) opcode, cmd_size));
 /* Determine buffer size.  */
@@ -721,7 +724,7 @@ sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf,
 			sg_remove_request(sfp, srp);
 			return -EINVAL;	/* either MMAP_IO or DIRECT_IO (not both) */
 		}
-		if (sg_res_in_use(sfp)) {
+		if (sfp->res_in_use) {
 			sg_remove_request(sfp, srp);
 			return -EBUSY;	/* reserve buffer already being used */
 		}
@@ -892,7 +895,7 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
 			return result;
 		if (val) {
 			sfp->low_dma = 1;
-			if ((0 == sfp->low_dma) && (0 == sg_res_in_use(sfp))) {
+			if ((0 == sfp->low_dma) && !sfp->res_in_use) {
 				val = (int) sfp->reserve.bufflen;
 				sg_remove_scat(sfp, &sfp->reserve);
 				sg_build_reserve(sfp, val);
@@ -967,12 +970,18 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
                         return -EINVAL;
 		val = min_t(int, val,
 			    max_sectors_bytes(sdp->device->request_queue));
+		mutex_lock(&sfp->f_mutex);
 		if (val != sfp->reserve.bufflen) {
-			if (sg_res_in_use(sfp) || sfp->mmap_called)
+			if (sfp->mmap_called ||
+			    sfp->res_in_use) {
+				mutex_unlock(&sfp->f_mutex);
 				return -EBUSY;
+			}
+
 			sg_remove_scat(sfp, &sfp->reserve);
 			sg_build_reserve(sfp, val);
 		}
+		mutex_unlock(&sfp->f_mutex);
 		return 0;
 	case SG_GET_RESERVED_SIZE:
 		val = min_t(int, sfp->reserve.bufflen,
@@ -1235,6 +1244,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
 	unsigned long req_sz, len, sa;
 	Sg_scatter_hold *rsv_schp;
 	int k, length;
+	int ret = 0;
 
 	if ((!filp) || (!vma) || (!(sfp = (Sg_fd *) filp->private_data)))
 		return -ENXIO;
@@ -1245,8 +1255,11 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (vma->vm_pgoff)
 		return -EINVAL;	/* want no offset */
 	rsv_schp = &sfp->reserve;
-	if (req_sz > rsv_schp->bufflen)
-		return -ENOMEM;	/* cannot map more than reserved buffer */
+	mutex_lock(&sfp->f_mutex);
+	if (req_sz > rsv_schp->bufflen) {
+		ret = -ENOMEM;	/* cannot map more than reserved buffer */
+		goto out;
+	}
 
 	sa = vma->vm_start;
 	length = 1 << (PAGE_SHIFT + rsv_schp->page_order);
@@ -1260,7 +1273,9 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
 	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_private_data = sfp;
 	vma->vm_ops = &sg_mmap_vm_ops;
-	return 0;
+out:
+	mutex_unlock(&sfp->f_mutex);
+	return ret;
 }
 
 static void
@@ -1727,13 +1742,25 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
 		md = &map_data;
 
 	if (md) {
-		if (!sg_res_in_use(sfp) && dxfer_len <= rsv_schp->bufflen)
+		mutex_lock(&sfp->f_mutex);
+		if (dxfer_len <= rsv_schp->bufflen &&
+		    !sfp->res_in_use) {
+			sfp->res_in_use = 1;
 			sg_link_reserve(sfp, srp, dxfer_len);
-		else {
+		} else if (hp->flags & SG_FLAG_MMAP_IO) {
+			res = -EBUSY; /* sfp->res_in_use == 1 */
+			if (dxfer_len > rsv_schp->bufflen)
+				res = -ENOMEM;
+			mutex_unlock(&sfp->f_mutex);
+			return res;
+		} else {
 			res = sg_build_indirect(req_schp, sfp, dxfer_len);
-			if (res)
+			if (res) {
+				mutex_unlock(&sfp->f_mutex);
 				return res;
+			}
 		}
+		mutex_unlock(&sfp->f_mutex);
 
 		md->pages = req_schp->pages;
 		md->page_order = req_schp->page_order;
@@ -2024,6 +2051,8 @@ sg_unlink_reserve(Sg_fd * sfp, Sg_request * srp)
 	req_schp->sglist_len = 0;
 	sfp->save_scat_len = 0;
 	srp->res_used = 0;
+	/* Called without mutex lock to avoid deadlock */
+	sfp->res_in_use = 0;
 }
 
 static Sg_request *
@@ -2135,6 +2164,7 @@ sg_add_sfp(Sg_device * sdp)
 	rwlock_init(&sfp->rq_list_lock);
 
 	kref_init(&sfp->f_ref);
+	mutex_init(&sfp->f_mutex);
 	sfp->timeout = SG_DEFAULT_TIMEOUT;
 	sfp->timeout_user = SG_DEFAULT_TIMEOUT_USER;
 	sfp->force_packid = SG_DEF_FORCE_PACK_ID;
@@ -2210,20 +2240,6 @@ sg_remove_sfp(struct kref *kref)
 	schedule_work(&sfp->ew.work);
 }
 
-static int
-sg_res_in_use(Sg_fd * sfp)
-{
-	const Sg_request *srp;
-	unsigned long iflags;
-
-	read_lock_irqsave(&sfp->rq_list_lock, iflags);
-	for (srp = sfp->headrp; srp; srp = srp->nextrp)
-		if (srp->res_used)
-			break;
-	read_unlock_irqrestore(&sfp->rq_list_lock, iflags);
-	return srp ? 1 : 0;
-}
-
 #ifdef CONFIG_SCSI_PROC_FS
 static int
 sg_idr_max_id(int id, void *p, void *data)

drivers/staging/android/fiq_debugger/fiq_debugger.c

@@ -400,7 +400,7 @@ static void fiq_debugger_work(struct work_struct *work)
 		cmd += 6;
 		while (*cmd == ' ')
 			cmd++;
-		if (cmd != '\0')
+		if (*cmd != '\0')
 			kernel_restart(cmd);
 		else
 			kernel_restart(NULL);

drivers/staging/rts5208/rtsx_scsi.c

@@ -414,7 +414,7 @@ void set_sense_data(struct rtsx_chip *chip, unsigned int lun, u8 err_code,
 	sense->ascq = ascq;
 	if (sns_key_info0 != 0) {
 		sense->sns_key_info[0] = SKSV | sns_key_info0;
-		sense->sns_key_info[1] = (sns_key_info1 & 0xf0) >> 8;
+		sense->sns_key_info[1] = (sns_key_info1 & 0xf0) >> 4;
 		sense->sns_key_info[2] = sns_key_info1 & 0x0f;
 	}
 }

drivers/staging/wilc1000/linux_wlan.c

@@ -269,23 +269,12 @@ static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
 
 int wilc_wlan_set_bssid(struct net_device *wilc_netdev, u8 *bssid, u8 mode)
 {
-	int i = 0;
-	int ret = -1;
-	struct wilc_vif *vif;
-	struct wilc *wilc;
+	struct wilc_vif *vif = netdev_priv(wilc_netdev);
 
-	vif = netdev_priv(wilc_netdev);
-	wilc = vif->wilc;
+	memcpy(vif->bssid, bssid, 6);
+	vif->mode = mode;
 
-	for (i = 0; i < wilc->vif_num; i++)
-		if (wilc->vif[i]->ndev == wilc_netdev) {
-			memcpy(wilc->vif[i]->bssid, bssid, 6);
-			wilc->vif[i]->mode = mode;
-			ret = 0;
-			break;
-		}
-
-	return ret;
+	return 0;
 }
 
 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
@@ -1212,16 +1201,11 @@ void WILC_WFI_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size)
 
 void wilc_netdev_cleanup(struct wilc *wilc)
 {
-	int i = 0;
-	struct wilc_vif *vif[NUM_CONCURRENT_IFC];
+	int i;
 
-	if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev)) {
+	if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev))
 		unregister_inetaddr_notifier(&g_dev_notifier);
 
-		for (i = 0; i < NUM_CONCURRENT_IFC; i++)
-			vif[i] = netdev_priv(wilc->vif[i]->ndev);
-	}
-
 	if (wilc && wilc->firmware) {
 		release_firmware(wilc->firmware);
 		wilc->firmware = NULL;
@@ -1230,7 +1214,7 @@ void wilc_netdev_cleanup(struct wilc *wilc)
 	if (wilc && (wilc->vif[0]->ndev || wilc->vif[1]->ndev)) {
 		for (i = 0; i < NUM_CONCURRENT_IFC; i++)
 			if (wilc->vif[i]->ndev)
-				if (vif[i]->mac_opened)
+				if (wilc->vif[i]->mac_opened)
 					wilc_mac_close(wilc->vif[i]->ndev);
 
 		for (i = 0; i < NUM_CONCURRENT_IFC; i++) {
@@ -1278,9 +1262,9 @@ int wilc_netdev_init(struct wilc **wilc, struct device *dev, int io_type,
 
 		vif->idx = wl->vif_num;
 		vif->wilc = *wilc;
+		vif->ndev = ndev;
 		wl->vif[i] = vif;
-		wl->vif[wl->vif_num]->ndev = ndev;
-		wl->vif_num++;
+		wl->vif_num = i;
 		ndev->netdev_ops = &wilc_netdev_ops;
 
 		{

drivers/usb/core/devio.c

@@ -629,6 +629,8 @@ static void async_completed(struct urb *urb)
 	if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
 			as->status != -ENOENT)
 		cancel_bulk_urbs(ps, as->bulk_addr);
+
+	wake_up(&ps->wait);
 	spin_unlock(&ps->lock);
 
 	if (signr) {
@@ -636,8 +638,6 @@ static void async_completed(struct urb *urb)
 		put_pid(pid);
 		put_cred(cred);
 	}
-
-	wake_up(&ps->wait);
 }
 
 static void destroy_async(struct usb_dev_state *ps, struct list_head *list)

drivers/usb/core/quirks.c

@@ -57,8 +57,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Microsoft LifeCam-VX700 v2.0 */
 	{ USB_DEVICE(0x045e, 0x0770), .driver_info = USB_QUIRK_RESET_RESUME },
 
-	/* Logitech HD Pro Webcams C920 and C930e */
+	/* Logitech HD Pro Webcams C920, C920-C and C930e */
 	{ USB_DEVICE(0x046d, 0x082d), .driver_info = USB_QUIRK_DELAY_INIT },
+	{ USB_DEVICE(0x046d, 0x0841), .driver_info = USB_QUIRK_DELAY_INIT },
 	{ USB_DEVICE(0x046d, 0x0843), .driver_info = USB_QUIRK_DELAY_INIT },
 
 	/* Logitech ConferenceCam CC3000e */
@@ -217,6 +218,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	{ USB_DEVICE(0x1a0a, 0x0200), .driver_info =
 			USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL },
 
+	/* Corsair Strafe RGB */
+	{ USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT },
+
 	/* Acer C120 LED Projector */
 	{ USB_DEVICE(0x1de1, 0xc102), .driver_info = USB_QUIRK_NO_LPM },
 

drivers/usb/host/pci-quirks.c

@@ -142,29 +142,30 @@ static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
 			pinfo->sb_type.gen = AMD_CHIPSET_SB700;
 		else if (rev >= 0x40 && rev <= 0x4f)
 			pinfo->sb_type.gen = AMD_CHIPSET_SB800;
-	}
-	pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
-					  0x145c, NULL);
-	if (pinfo->smbus_dev) {
-		pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
 	} else {
 		pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
 				PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
 
-		if (!pinfo->smbus_dev) {
-			pinfo->sb_type.gen = NOT_AMD_CHIPSET;
-			return 0;
+		if (pinfo->smbus_dev) {
+			rev = pinfo->smbus_dev->revision;
+			if (rev >= 0x11 && rev <= 0x14)
+				pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
+			else if (rev >= 0x15 && rev <= 0x18)
+				pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
+			else if (rev >= 0x39 && rev <= 0x3a)
+				pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
+		} else {
+			pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+							  0x145c, NULL);
+			if (pinfo->smbus_dev) {
+				rev = pinfo->smbus_dev->revision;
+				pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
+			} else {
+				pinfo->sb_type.gen = NOT_AMD_CHIPSET;
+				return 0;
+			}
 		}
-
-		rev = pinfo->smbus_dev->revision;
-		if (rev >= 0x11 && rev <= 0x14)
-			pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
-		else if (rev >= 0x15 && rev <= 0x18)
-			pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
-		else if (rev >= 0x39 && rev <= 0x3a)
-			pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
 	}
-
 	pinfo->sb_type.rev = rev;
 	return 1;
 }

drivers/usb/musb/musb_core.c

@@ -2655,6 +2655,13 @@ static int musb_suspend(struct device *dev)
 {
 	struct musb	*musb = dev_to_musb(dev);
 	unsigned long	flags;
+	int ret;
+
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(dev);
+		return ret;
+	}
 
 	musb_platform_disable(musb);
 	musb_generic_disable(musb);
@@ -2703,14 +2710,6 @@ static int musb_resume(struct device *dev)
 	if ((devctl & mask) != (musb->context.devctl & mask))
 		musb->port1_status = 0;
 
-	/*
-	 * The USB HUB code expects the device to be in RPM_ACTIVE once it came
-	 * out of suspend
-	 */
-	pm_runtime_disable(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
-
 	musb_start(musb);
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -2720,6 +2719,9 @@ static int musb_resume(struct device *dev)
 			error);
 	spin_unlock_irqrestore(&musb->lock, flags);
 
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
 	return 0;
 }
 

drivers/usb/serial/option.c

@@ -2023,6 +2023,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(0x2001, 0x7d03, 0xff, 0x02, 0x01) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(0x2001, 0x7d03, 0xff, 0x00, 0x00) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d04, 0xff) },			/* D-Link DWM-158 */
+	{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d0e, 0xff) },			/* D-Link DWM-157 C1 */
 	{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7e19, 0xff),			/* D-Link DWM-221 B1 */
 	  .driver_info = (kernel_ulong_t)&net_intf4_blacklist },
 	{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7e35, 0xff),			/* D-Link DWM-222 */

fs/btrfs/super.c

@@ -1834,6 +1834,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
 			goto restore;
 		}
 
+		btrfs_qgroup_rescan_resume(fs_info);
+
 		if (!fs_info->uuid_root) {
 			btrfs_info(fs_info, "creating UUID tree");
 			ret = btrfs_create_uuid_tree(fs_info);

fs/ceph/addr.c

@@ -188,7 +188,7 @@ static int ceph_releasepage(struct page *page, gfp_t g)
 /*
  * read a single page, without unlocking it.
  */
-static int readpage_nounlock(struct file *filp, struct page *page)
+static int ceph_do_readpage(struct file *filp, struct page *page)
 {
 	struct inode *inode = file_inode(filp);
 	struct ceph_inode_info *ci = ceph_inode(inode);
@@ -218,7 +218,7 @@ static int readpage_nounlock(struct file *filp, struct page *page)
 
 	err = ceph_readpage_from_fscache(inode, page);
 	if (err == 0)
-		goto out;
+		return -EINPROGRESS;
 
 	dout("readpage inode %p file %p page %p index %lu\n",
 	     inode, filp, page, page->index);
@@ -248,8 +248,11 @@ out:
 
 static int ceph_readpage(struct file *filp, struct page *page)
 {
-	int r = readpage_nounlock(filp, page);
-	unlock_page(page);
+	int r = ceph_do_readpage(filp, page);
+	if (r != -EINPROGRESS)
+		unlock_page(page);
+	else
+		r = 0;
 	return r;
 }
 
@@ -1235,7 +1238,7 @@ retry_locked:
 			goto retry_locked;
 		r = writepage_nounlock(page, NULL);
 		if (r < 0)
-			goto fail_nosnap;
+			goto fail_unlock;
 		goto retry_locked;
 	}
 
@@ -1263,11 +1266,14 @@ retry_locked:
 	}
 
 	/* we need to read it. */
-	r = readpage_nounlock(file, page);
-	if (r < 0)
-		goto fail_nosnap;
+	r = ceph_do_readpage(file, page);
+	if (r < 0) {
+		if (r == -EINPROGRESS)
+			return -EAGAIN;
+		goto fail_unlock;
+	}
 	goto retry_locked;
-fail_nosnap:
+fail_unlock:
 	unlock_page(page);
 	return r;
 }

fs/ceph/cache.c

@@ -240,13 +240,7 @@ void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp)
 	}
 }
 
-static void ceph_vfs_readpage_complete(struct page *page, void *data, int error)
-{
-	if (!error)
-		SetPageUptodate(page);
-}
-
-static void ceph_vfs_readpage_complete_unlock(struct page *page, void *data, int error)
+static void ceph_readpage_from_fscache_complete(struct page *page, void *data, int error)
 {
 	if (!error)
 		SetPageUptodate(page);
@@ -274,7 +268,7 @@ int ceph_readpage_from_fscache(struct inode *inode, struct page *page)
 		return -ENOBUFS;
 
 	ret = fscache_read_or_alloc_page(ci->fscache, page,
-					 ceph_vfs_readpage_complete, NULL,
+					 ceph_readpage_from_fscache_complete, NULL,
 					 GFP_KERNEL);
 
 	switch (ret) {
@@ -303,7 +297,7 @@ int ceph_readpages_from_fscache(struct inode *inode,
 		return -ENOBUFS;
 
 	ret = fscache_read_or_alloc_pages(ci->fscache, mapping, pages, nr_pages,
-					  ceph_vfs_readpage_complete_unlock,
+					  ceph_readpage_from_fscache_complete,
 					  NULL, mapping_gfp_mask(mapping));
 
 	switch (ret) {

fs/cifs/dir.c

@@ -194,7 +194,7 @@ check_name(struct dentry *direntry, struct cifs_tcon *tcon)
 	int i;
 
 	if (unlikely(direntry->d_name.len >
-		     tcon->fsAttrInfo.MaxPathNameComponentLength))
+		     le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
 		return -ENAMETOOLONG;
 
 	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {

fs/cifs/smb2pdu.h

@@ -84,8 +84,8 @@
 
 #define NUMBER_OF_SMB2_COMMANDS	0x0013
 
-/* BB FIXME - analyze following length BB */
-#define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
+/* 4 len + 52 transform hdr + 64 hdr + 56 create rsp */
+#define MAX_SMB2_HDR_SIZE 0x00b0
 
 #define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe)
 #define SMB2_TRANSFORM_PROTO_NUM cpu_to_le32(0x424d53fd)

fs/dlm/user.c

@@ -355,6 +355,10 @@ static int dlm_device_register(struct dlm_ls *ls, char *name)
 	error = misc_register(&ls->ls_device);
 	if (error) {
 		kfree(ls->ls_device.name);
+		/* this has to be set to NULL
+		 * to avoid a double-free in dlm_device_deregister
+		 */
+		ls->ls_device.name = NULL;
 	}
 fail:
 	return error;

fs/eventpoll.c

@@ -524,8 +524,13 @@ static void ep_remove_wait_queue(struct eppoll_entry *pwq)
 	wait_queue_head_t *whead;
 
 	rcu_read_lock();
-	/* If it is cleared by POLLFREE, it should be rcu-safe */
-	whead = rcu_dereference(pwq->whead);
+	/*
+	 * If it is cleared by POLLFREE, it should be rcu-safe.
+	 * If we read NULL we need a barrier paired with
+	 * smp_store_release() in ep_poll_callback(), otherwise
+	 * we rely on whead->lock.
+	 */
+	whead = smp_load_acquire(&pwq->whead);
 	if (whead)
 		remove_wait_queue(whead, &pwq->wait);
 	rcu_read_unlock();
@@ -1010,17 +1015,6 @@ static int ep_poll_callback(wait_queue_t *wait, unsigned mode, int sync, void *k
 	struct eventpoll *ep = epi->ep;
 	int ewake = 0;
 
-	if ((unsigned long)key & POLLFREE) {
-		ep_pwq_from_wait(wait)->whead = NULL;
-		/*
-		 * whead = NULL above can race with ep_remove_wait_queue()
-		 * which can do another remove_wait_queue() after us, so we
-		 * can't use __remove_wait_queue(). whead->lock is held by
-		 * the caller.
-		 */
-		list_del_init(&wait->task_list);
-	}
-
 	spin_lock_irqsave(&ep->lock, flags);
 
 	/*
@@ -1102,10 +1096,26 @@ out_unlock:
 	if (pwake)
 		ep_poll_safewake(&ep->poll_wait);
 
-	if (epi->event.events & EPOLLEXCLUSIVE)
-		return ewake;
+	if (!(epi->event.events & EPOLLEXCLUSIVE))
+		ewake = 1;
 
-	return 1;
+	if ((unsigned long)key & POLLFREE) {
+		/*
+		 * If we race with ep_remove_wait_queue() it can miss
+		 * ->whead = NULL and do another remove_wait_queue() after
+		 * us, so we can't use __remove_wait_queue().
+		 */
+		list_del_init(&wait->task_list);
+		/*
+		 * ->whead != NULL protects us from the race with ep_free()
+		 * or ep_remove(), ep_remove_wait_queue() takes whead->lock
+		 * held by the caller. Once we nullify it, nothing protects
+		 * ep/epi or even wait.
+		 */
+		smp_store_release(&ep_pwq_from_wait(wait)->whead, NULL);
+	}
+
+	return ewake;
 }
 
 /*

fs/namespace.c

@@ -227,6 +227,7 @@ static struct mount *alloc_vfsmnt(const char *name)
 		mnt->mnt_count = 1;
 		mnt->mnt_writers = 0;
 #endif
+		mnt->mnt.data = NULL;
 
 		INIT_HLIST_NODE(&mnt->mnt_hash);
 		INIT_LIST_HEAD(&mnt->mnt_child);
@@ -976,7 +977,6 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
 	if (!mnt)
 		return ERR_PTR(-ENOMEM);
 
-	mnt->mnt.data = NULL;
 	if (type->alloc_mnt_data) {
 		mnt->mnt.data = type->alloc_mnt_data();
 		if (!mnt->mnt.data) {
@@ -990,7 +990,6 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
 
 	root = mount_fs(type, flags, name, &mnt->mnt, data);
 	if (IS_ERR(root)) {
-		kfree(mnt->mnt.data);
 		mnt_free_id(mnt);
 		free_vfsmnt(mnt);
 		return ERR_CAST(root);
@@ -1109,7 +1108,6 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
 	return mnt;
 
  out_free:
-	kfree(mnt->mnt.data);
 	mnt_free_id(mnt);
 	free_vfsmnt(mnt);
 	return ERR_PTR(err);

fs/nfs/file.c

@@ -636,11 +636,11 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 	if (result <= 0)
 		goto out;
 
-	result = generic_write_sync(iocb, result);
-	if (result < 0)
-		goto out;
 	written = result;
 	iocb->ki_pos += written;
+	result = generic_write_sync(iocb, written);
+	if (result < 0)
+		goto out;
 
 	/* Return error values */
 	if (nfs_need_check_write(file, inode)) {

fs/nfs/internal.h

@@ -248,7 +248,6 @@ int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
 extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
 struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
 void nfs_pgio_header_free(struct nfs_pgio_header *);
-void nfs_pgio_data_destroy(struct nfs_pgio_header *);
 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
 int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
 		      struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,

fs/nfs/pagelist.c

@@ -497,16 +497,6 @@ struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops)
 }
 EXPORT_SYMBOL_GPL(nfs_pgio_header_alloc);
 
-/*
- * nfs_pgio_header_free - Free a read or write header
- * @hdr: The header to free
- */
-void nfs_pgio_header_free(struct nfs_pgio_header *hdr)
-{
-	hdr->rw_ops->rw_free_header(hdr);
-}
-EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
-
 /**
  * nfs_pgio_data_destroy - make @hdr suitable for reuse
  *
@@ -515,14 +505,24 @@ EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
  *
  * @hdr: A header that has had nfs_generic_pgio called
  */
-void nfs_pgio_data_destroy(struct nfs_pgio_header *hdr)
+static void nfs_pgio_data_destroy(struct nfs_pgio_header *hdr)
 {
 	if (hdr->args.context)
 		put_nfs_open_context(hdr->args.context);
 	if (hdr->page_array.pagevec != hdr->page_array.page_array)
 		kfree(hdr->page_array.pagevec);
 }
-EXPORT_SYMBOL_GPL(nfs_pgio_data_destroy);
+
+/*
+ * nfs_pgio_header_free - Free a read or write header
+ * @hdr: The header to free
+ */
+void nfs_pgio_header_free(struct nfs_pgio_header *hdr)
+{
+	nfs_pgio_data_destroy(hdr);
+	hdr->rw_ops->rw_free_header(hdr);
+}
+EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
 
 /**
  * nfs_pgio_rpcsetup - Set up arguments for a pageio call
@@ -636,7 +636,6 @@ EXPORT_SYMBOL_GPL(nfs_initiate_pgio);
 static void nfs_pgio_error(struct nfs_pgio_header *hdr)
 {
 	set_bit(NFS_IOHDR_REDO, &hdr->flags);
-	nfs_pgio_data_destroy(hdr);
 	hdr->completion_ops->completion(hdr);
 }
 
@@ -647,7 +646,6 @@ static void nfs_pgio_error(struct nfs_pgio_header *hdr)
 static void nfs_pgio_release(void *calldata)
 {
 	struct nfs_pgio_header *hdr = calldata;
-	nfs_pgio_data_destroy(hdr);
 	hdr->completion_ops->completion(hdr);
 }
 

fs/nfs/pnfs.c

@@ -2145,7 +2145,6 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
 		nfs_pageio_reset_write_mds(desc);
 		mirror->pg_recoalesce = 1;
 	}
-	nfs_pgio_data_destroy(hdr);
 	hdr->release(hdr);
 }
 
@@ -2257,7 +2256,6 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
 		nfs_pageio_reset_read_mds(desc);
 		mirror->pg_recoalesce = 1;
 	}
-	nfs_pgio_data_destroy(hdr);
 	hdr->release(hdr);
 }
 

fs/sdcardfs/derived_perm.c

@@ -176,6 +176,9 @@ void fixup_lower_ownership(struct dentry *dentry, const char *name)
 	gid_t gid = sbi->options.fs_low_gid;
 	struct iattr newattrs;
 
+	if (!sbi->options.gid_derivation)
+		return;
+
 	info = SDCARDFS_I(d_inode(dentry));
 	info_d = info->data;
 	perm = info_d->perm;

fs/sdcardfs/inode.c

@@ -34,10 +34,14 @@ const struct cred *override_fsids(struct sdcardfs_sb_info *sbi,
 	if (!cred)
 		return NULL;
 
-	if (data->under_obb)
-		uid = AID_MEDIA_OBB;
-	else
-		uid = multiuser_get_uid(data->userid, sbi->options.fs_low_uid);
+	if (sbi->options.gid_derivation) {
+		if (data->under_obb)
+			uid = AID_MEDIA_OBB;
+		else
+			uid = multiuser_get_uid(data->userid, sbi->options.fs_low_uid);
+	} else {
+		uid = sbi->options.fs_low_uid;
+	}
 	cred->fsuid = make_kuid(&init_user_ns, uid);
 	cred->fsgid = make_kgid(&init_user_ns, sbi->options.fs_low_gid);
 

fs/sdcardfs/main.c

@@ -32,6 +32,7 @@ enum {
 	Opt_multiuser,
 	Opt_userid,
 	Opt_reserved_mb,
+	Opt_gid_derivation,
 	Opt_err,
 };
 
@@ -43,6 +44,7 @@ static const match_table_t sdcardfs_tokens = {
 	{Opt_mask, "mask=%u"},
 	{Opt_userid, "userid=%d"},
 	{Opt_multiuser, "multiuser"},
+	{Opt_gid_derivation, "derive_gid"},
 	{Opt_reserved_mb, "reserved_mb=%u"},
 	{Opt_err, NULL}
 };
@@ -64,6 +66,8 @@ static int parse_options(struct super_block *sb, char *options, int silent,
 	vfsopts->gid = 0;
 	/* by default, 0MB is reserved */
 	opts->reserved_mb = 0;
+	/* by default, gid derivation is off */
+	opts->gid_derivation = false;
 
 	*debug = 0;
 
@@ -115,6 +119,9 @@ static int parse_options(struct super_block *sb, char *options, int silent,
 				return 0;
 			opts->reserved_mb = option;
 			break;
+		case Opt_gid_derivation:
+			opts->gid_derivation = true;
+			break;
 		/* unknown option */
 		default:
 			if (!silent)

fs/sdcardfs/sdcardfs.h

@@ -219,6 +219,7 @@ struct sdcardfs_mount_options {
 	gid_t fs_low_gid;
 	userid_t fs_user_id;
 	bool multiuser;
+	bool gid_derivation;
 	unsigned int reserved_mb;
 };
 

fs/sdcardfs/super.c

@@ -302,6 +302,8 @@ static int sdcardfs_show_options(struct vfsmount *mnt, struct seq_file *m,
 		seq_printf(m, ",mask=%u", vfsopts->mask);
 	if (opts->fs_user_id)
 		seq_printf(m, ",userid=%u", opts->fs_user_id);
+	if (opts->gid_derivation)
+		seq_puts(m, ",derive_gid");
 	if (opts->reserved_mb != 0)
 		seq_printf(m, ",reserved=%uMB", opts->reserved_mb);
 

fs/xfs/xfs_linux.h

@@ -363,7 +363,14 @@ static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
 #endif /* DEBUG */
 
 #ifdef CONFIG_XFS_RT
-#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
+
+/*
+ * make sure we ignore the inode flag if the filesystem doesn't have a
+ * configured realtime device.
+ */
+#define XFS_IS_REALTIME_INODE(ip)			\
+	(((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) &&	\
+	 (ip)->i_mount->m_rtdev_targp)
 #else
 #define XFS_IS_REALTIME_INODE(ip) (0)
 #endif

include/asm-generic/topology.h

@@ -48,7 +48,11 @@
 #define parent_node(node)	((void)(node),0)
 #endif
 #ifndef cpumask_of_node
-#define cpumask_of_node(node)	((void)node, cpu_online_mask)
+  #ifdef CONFIG_NEED_MULTIPLE_NODES
+    #define cpumask_of_node(node)	((node) == 0 ? cpu_online_mask : cpu_none_mask)
+  #else
+    #define cpumask_of_node(node)	((void)node, cpu_online_mask)
+  #endif
 #endif
 #ifndef pcibus_to_node
 #define pcibus_to_node(bus)	((void)(bus), -1)

include/linux/pci_ids.h

@@ -574,6 +574,7 @@
 #define PCI_DEVICE_ID_AMD_CS5536_EHC    0x2095
 #define PCI_DEVICE_ID_AMD_CS5536_UDC    0x2096
 #define PCI_DEVICE_ID_AMD_CS5536_UOC    0x2097
+#define PCI_DEVICE_ID_AMD_CS5536_DEV_IDE    0x2092
 #define PCI_DEVICE_ID_AMD_CS5536_IDE    0x209A
 #define PCI_DEVICE_ID_AMD_LX_VIDEO  0x2081
 #define PCI_DEVICE_ID_AMD_LX_AES    0x2082

include/linux/workqueue.h

@@ -311,8 +311,8 @@ enum {
 
 	__WQ_DRAINING		= 1 << 16, /* internal: workqueue is draining */
 	__WQ_ORDERED		= 1 << 17, /* internal: workqueue is ordered */
-	__WQ_ORDERED_EXPLICIT	= 1 << 18, /* internal: alloc_ordered_workqueue() */
 	__WQ_LEGACY		= 1 << 18, /* internal: create*_workqueue() */
+	__WQ_ORDERED_EXPLICIT	= 1 << 19, /* internal: alloc_ordered_workqueue() */
 
 	WQ_MAX_ACTIVE		= 512,	  /* I like 512, better ideas? */
 	WQ_MAX_UNBOUND_PER_CPU	= 4,	  /* 4 * #cpus for unbound wq */

kernel/configs/android-base.config

@@ -37,6 +37,7 @@ CONFIG_INET_XFRM_MODE_TUNNEL=y
 CONFIG_IP6_NF_FILTER=y
 CONFIG_IP6_NF_IPTABLES=y
 CONFIG_IP6_NF_MANGLE=y
+CONFIG_IP6_NF_MATCH_RPFILTER=y
 CONFIG_IP6_NF_RAW=y
 CONFIG_IP6_NF_TARGET_REJECT=y
 CONFIG_IPV6=y
@@ -149,7 +150,7 @@ CONFIG_SECURITY_NETWORK=y
 CONFIG_SECURITY_PERF_EVENTS_RESTRICT=y
 CONFIG_SECURITY_SELINUX=y
 CONFIG_STAGING=y
-CONFIG_SYNC=y
+CONFIG_SYNC_FILE=y
 CONFIG_TUN=y
 CONFIG_UID_SYS_STATS=y
 CONFIG_UNIX=y

kernel/cpuset.c

@@ -1908,6 +1908,7 @@ static struct cftype files[] = {
 	{
 		.name = "memory_pressure",
 		.read_u64 = cpuset_read_u64,
+		.private = FILE_MEMORY_PRESSURE,
 	},
 
 	{

kernel/events/uprobes.c

@@ -1254,8 +1254,6 @@ void uprobe_end_dup_mmap(void)
 
 void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
 {
-	newmm->uprobes_state.xol_area = NULL;
-
 	if (test_bit(MMF_HAS_UPROBES, &oldmm->flags)) {
 		set_bit(MMF_HAS_UPROBES, &newmm->flags);
 		/* unconditionally, dup_mmap() skips VM_DONTCOPY vmas */

kernel/fork.c

@@ -745,6 +745,13 @@ static void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
 #endif
 }
 
+static void mm_init_uprobes_state(struct mm_struct *mm)
+{
+#ifdef CONFIG_UPROBES
+	mm->uprobes_state.xol_area = NULL;
+#endif
+}
+
 static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
 	struct user_namespace *user_ns)
 {
@@ -772,6 +779,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
 	mm->pmd_huge_pte = NULL;
 #endif
+	mm_init_uprobes_state(mm);
 
 	if (current->mm) {
 		mm->flags = current->mm->flags & MMF_INIT_MASK;

kernel/gcov/base.c

@@ -98,6 +98,12 @@ void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
 }
 EXPORT_SYMBOL(__gcov_merge_icall_topn);
 
+void __gcov_exit(void)
+{
+	/* Unused. */
+}
+EXPORT_SYMBOL(__gcov_exit);
+
 /**
  * gcov_enable_events - enable event reporting through gcov_event()
  *

kernel/gcov/gcc_4_7.c

@@ -18,7 +18,9 @@
 #include <linux/vmalloc.h>
 #include "gcov.h"
 
-#if (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
+#if (__GNUC__ >= 7)
+#define GCOV_COUNTERS			9
+#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
 #define GCOV_COUNTERS			10
 #elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
 #define GCOV_COUNTERS			9

kernel/locking/locktorture.c

@@ -780,6 +780,10 @@ static void lock_torture_cleanup(void)
 	else
 		lock_torture_print_module_parms(cxt.cur_ops,
 						"End of test: SUCCESS");
+
+	kfree(cxt.lwsa);
+	kfree(cxt.lrsa);
+
 end:
 	torture_cleanup_end();
 }
@@ -924,6 +928,8 @@ static int __init lock_torture_init(void)
 				       GFP_KERNEL);
 		if (reader_tasks == NULL) {
 			VERBOSE_TOROUT_ERRSTRING("reader_tasks: Out of memory");
+			kfree(writer_tasks);
+			writer_tasks = NULL;
 			firsterr = -ENOMEM;
 			goto unwind;
 		}

kernel/locking/spinlock_debug.c

@@ -103,38 +103,14 @@ static inline void debug_spin_unlock(raw_spinlock_t *lock)
 	lock->owner_cpu = -1;
 }
 
-static void __spin_lock_debug(raw_spinlock_t *lock)
-{
-	u64 i;
-	u64 loops = loops_per_jiffy * HZ;
-
-	for (i = 0; i < loops; i++) {
-		if (arch_spin_trylock(&lock->raw_lock))
-			return;
-		__delay(1);
-	}
-	/* lockup suspected: */
-	spin_dump(lock, "lockup suspected");
-#ifdef CONFIG_SMP
-	trigger_all_cpu_backtrace();
-#endif
-
-	/*
-	 * The trylock above was causing a livelock.  Give the lower level arch
-	 * specific lock code a chance to acquire the lock. We have already
-	 * printed a warning/backtrace at this point. The non-debug arch
-	 * specific code might actually succeed in acquiring the lock.  If it is
-	 * not successful, the end-result is the same - there is no forward
-	 * progress.
-	 */
-	arch_spin_lock(&lock->raw_lock);
-}
-
+/*
+ * We are now relying on the NMI watchdog to detect lockup instead of doing
+ * the detection here with an unfair lock which can cause problem of its own.
+ */
 void do_raw_spin_lock(raw_spinlock_t *lock)
 {
 	debug_spin_lock_before(lock);
-	if (unlikely(!arch_spin_trylock(&lock->raw_lock)))
-		__spin_lock_debug(lock);
+	arch_spin_lock(&lock->raw_lock);
 	debug_spin_lock_after(lock);
 }
 
@@ -172,32 +148,6 @@ static void rwlock_bug(rwlock_t *lock, const char *msg)
 
 #define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg)
 
-#if 0		/* __write_lock_debug() can lock up - maybe this can too? */
-static void __read_lock_debug(rwlock_t *lock)
-{
-	u64 i;
-	u64 loops = loops_per_jiffy * HZ;
-	int print_once = 1;
-
-	for (;;) {
-		for (i = 0; i < loops; i++) {
-			if (arch_read_trylock(&lock->raw_lock))
-				return;
-			__delay(1);
-		}
-		/* lockup suspected: */
-		if (print_once) {
-			print_once = 0;
-			printk(KERN_EMERG "BUG: read-lock lockup on CPU#%d, "
-					"%s/%d, %p\n",
-				raw_smp_processor_id(), current->comm,
-				current->pid, lock);
-			dump_stack();
-		}
-	}
-}
-#endif
-
 void do_raw_read_lock(rwlock_t *lock)
 {
 	RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
@@ -247,32 +197,6 @@ static inline void debug_write_unlock(rwlock_t *lock)
 	lock->owner_cpu = -1;
 }
 
-#if 0		/* This can cause lockups */
-static void __write_lock_debug(rwlock_t *lock)
-{
-	u64 i;
-	u64 loops = loops_per_jiffy * HZ;
-	int print_once = 1;
-
-	for (;;) {
-		for (i = 0; i < loops; i++) {
-			if (arch_write_trylock(&lock->raw_lock))
-				return;
-			__delay(1);
-		}
-		/* lockup suspected: */
-		if (print_once) {
-			print_once = 0;
-			printk(KERN_EMERG "BUG: write-lock lockup on CPU#%d, "
-					"%s/%d, %p\n",
-				raw_smp_processor_id(), current->comm,
-				current->pid, lock);
-			dump_stack();
-		}
-	}
-}
-#endif
-
 void do_raw_write_lock(rwlock_t *lock)
 {
 	debug_write_lock_before(lock);

lib/lz4/lz4hc_compress.c

@@ -131,7 +131,7 @@ static inline int lz4hc_insertandfindbestmatch(struct lz4hc_data *hc4,
 #endif
 	int nbattempts = MAX_NB_ATTEMPTS;
 	size_t repl = 0, ml = 0;
-	u16 delta;
+	u16 delta = 0;
 
 	/* HC4 match finder */
 	lz4hc_insert(hc4, ip);

lib/mpi/mpicoder.c

@@ -364,11 +364,11 @@ MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int nbytes)
 	}
 
 	miter.consumed = lzeros;
-	sg_miter_stop(&miter);
 
 	nbytes -= lzeros;
 	nbits = nbytes * 8;
 	if (nbits > MAX_EXTERN_MPI_BITS) {
+		sg_miter_stop(&miter);
 		pr_info("MPI: mpi too large (%u bits)\n", nbits);
 		return NULL;
 	}
@@ -376,6 +376,8 @@ MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int nbytes)
 	if (nbytes > 0)
 		nbits -= count_leading_zeros(*buff) - (BITS_PER_LONG - 8);
 
+	sg_miter_stop(&miter);
+
 	nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
 	val = mpi_alloc(nlimbs);
 	if (!val)

mm/madvise.c

@@ -533,6 +533,8 @@ static long madvise_remove(struct vm_area_struct *vma,
 static int madvise_hwpoison(int bhv, unsigned long start, unsigned long end)
 {
 	struct page *p;
+	struct zone *zone;
+
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	for (; start < end; start += PAGE_SIZE <<
@@ -561,6 +563,11 @@ static int madvise_hwpoison(int bhv, unsigned long start, unsigned long end)
 		if (ret)
 			return ret;
 	}
+
+	/* Ensure that all poisoned pages are removed from per-cpu lists */
+	for_each_populated_zone(zone)
+		drain_all_pages(zone);
+
 	return 0;
 }
 #endif

mm/memory.c

@@ -3596,6 +3596,11 @@ int handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
 	/* do counter updates before entering really critical section. */
 	check_sync_rss_stat(current);
 
+	if (!arch_vma_access_permitted(vma, flags & FAULT_FLAG_WRITE,
+					    flags & FAULT_FLAG_INSTRUCTION,
+					    flags & FAULT_FLAG_REMOTE))
+		return VM_FAULT_SIGSEGV;
+
 	/*
 	 * Enable the memcg OOM handling for faults triggered in user
 	 * space.  Kernel faults are handled more gracefully.
@@ -3603,11 +3608,6 @@ int handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
 	if (flags & FAULT_FLAG_USER)
 		mem_cgroup_oom_enable();
 
-	if (!arch_vma_access_permitted(vma, flags & FAULT_FLAG_WRITE,
-					    flags & FAULT_FLAG_INSTRUCTION,
-					    flags & FAULT_FLAG_REMOTE))
-		return VM_FAULT_SIGSEGV;
-
 	if (unlikely(is_vm_hugetlb_page(vma)))
 		ret = hugetlb_fault(vma->vm_mm, vma, address, flags);
 	else

net/bluetooth/l2cap_core.c

@@ -58,7 +58,7 @@ static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
 				       u8 code, u8 ident, u16 dlen, void *data);
 static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
 			   void *data);
-static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data);
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size);
 static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err);
 
 static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
@@ -1473,7 +1473,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
 
 			set_bit(CONF_REQ_SENT, &chan->conf_state);
 			l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-				       l2cap_build_conf_req(chan, buf), buf);
+				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
 			chan->num_conf_req++;
 		}
 
@@ -2977,12 +2977,15 @@ static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen,
 	return len;
 }
 
-static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
+static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val, size_t size)
 {
 	struct l2cap_conf_opt *opt = *ptr;
 
 	BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val);
 
+	if (size < L2CAP_CONF_OPT_SIZE + len)
+		return;
+
 	opt->type = type;
 	opt->len  = len;
 
@@ -3007,7 +3010,7 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
 	*ptr += L2CAP_CONF_OPT_SIZE + len;
 }
 
-static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan)
+static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan, size_t size)
 {
 	struct l2cap_conf_efs efs;
 
@@ -3035,7 +3038,7 @@ static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan)
 	}
 
 	l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs),
-			   (unsigned long) &efs);
+			   (unsigned long) &efs, size);
 }
 
 static void l2cap_ack_timeout(struct work_struct *work)
@@ -3181,11 +3184,12 @@ static inline void l2cap_txwin_setup(struct l2cap_chan *chan)
 	chan->ack_win = chan->tx_win;
 }
 
-static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data)
+static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
 {
 	struct l2cap_conf_req *req = data;
 	struct l2cap_conf_rfc rfc = { .mode = chan->mode };
 	void *ptr = req->data;
+	void *endptr = data + data_size;
 	u16 size;
 
 	BT_DBG("chan %p", chan);
@@ -3210,7 +3214,7 @@ static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data)
 
 done:
 	if (chan->imtu != L2CAP_DEFAULT_MTU)
-		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu);
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);
 
 	switch (chan->mode) {
 	case L2CAP_MODE_BASIC:
@@ -3229,7 +3233,7 @@ done:
 		rfc.max_pdu_size    = 0;
 
 		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
-				   (unsigned long) &rfc);
+				   (unsigned long) &rfc, endptr - ptr);
 		break;
 
 	case L2CAP_MODE_ERTM:
@@ -3249,21 +3253,21 @@ done:
 				       L2CAP_DEFAULT_TX_WINDOW);
 
 		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
-				   (unsigned long) &rfc);
+				   (unsigned long) &rfc, endptr - ptr);
 
 		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
-			l2cap_add_opt_efs(&ptr, chan);
+			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
 
 		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
-					   chan->tx_win);
+					   chan->tx_win, endptr - ptr);
 
 		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
 			if (chan->fcs == L2CAP_FCS_NONE ||
 			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
 				chan->fcs = L2CAP_FCS_NONE;
 				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
-						   chan->fcs);
+						   chan->fcs, endptr - ptr);
 			}
 		break;
 
@@ -3281,17 +3285,17 @@ done:
 		rfc.max_pdu_size = cpu_to_le16(size);
 
 		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
-				   (unsigned long) &rfc);
+				   (unsigned long) &rfc, endptr - ptr);
 
 		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
-			l2cap_add_opt_efs(&ptr, chan);
+			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);
 
 		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
 			if (chan->fcs == L2CAP_FCS_NONE ||
 			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
 				chan->fcs = L2CAP_FCS_NONE;
 				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
-						   chan->fcs);
+						   chan->fcs, endptr - ptr);
 			}
 		break;
 	}
@@ -3302,10 +3306,11 @@ done:
 	return ptr - data;
 }
 
-static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data)
+static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
 {
 	struct l2cap_conf_rsp *rsp = data;
 	void *ptr = rsp->data;
+	void *endptr = data + data_size;
 	void *req = chan->conf_req;
 	int len = chan->conf_len;
 	int type, hint, olen;
@@ -3407,7 +3412,7 @@ done:
 			return -ECONNREFUSED;
 
 		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
-				   (unsigned long) &rfc);
+				   (unsigned long) &rfc, endptr - ptr);
 	}
 
 	if (result == L2CAP_CONF_SUCCESS) {
@@ -3420,7 +3425,7 @@ done:
 			chan->omtu = mtu;
 			set_bit(CONF_MTU_DONE, &chan->conf_state);
 		}
-		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu);
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu, endptr - ptr);
 
 		if (remote_efs) {
 			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
@@ -3434,7 +3439,7 @@ done:
 
 				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
 						   sizeof(efs),
-						   (unsigned long) &efs);
+						   (unsigned long) &efs, endptr - ptr);
 			} else {
 				/* Send PENDING Conf Rsp */
 				result = L2CAP_CONF_PENDING;
@@ -3467,7 +3472,7 @@ done:
 			set_bit(CONF_MODE_DONE, &chan->conf_state);
 
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
-					   sizeof(rfc), (unsigned long) &rfc);
+					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
 
 			if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
 				chan->remote_id = efs.id;
@@ -3481,7 +3486,7 @@ done:
 					le32_to_cpu(efs.sdu_itime);
 				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
 						   sizeof(efs),
-						   (unsigned long) &efs);
+						   (unsigned long) &efs, endptr - ptr);
 			}
 			break;
 
@@ -3495,7 +3500,7 @@ done:
 			set_bit(CONF_MODE_DONE, &chan->conf_state);
 
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
-					   (unsigned long) &rfc);
+					   (unsigned long) &rfc, endptr - ptr);
 
 			break;
 
@@ -3517,10 +3522,11 @@ done:
 }
 
 static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
-				void *data, u16 *result)
+				void *data, size_t size, u16 *result)
 {
 	struct l2cap_conf_req *req = data;
 	void *ptr = req->data;
+	void *endptr = data + size;
 	int type, olen;
 	unsigned long val;
 	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
@@ -3538,13 +3544,13 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
 				chan->imtu = L2CAP_DEFAULT_MIN_MTU;
 			} else
 				chan->imtu = val;
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu);
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_FLUSH_TO:
 			chan->flush_to = val;
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
-					   2, chan->flush_to);
+					   2, chan->flush_to, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_RFC:
@@ -3558,13 +3564,13 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
 			chan->fcs = 0;
 
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
-					   sizeof(rfc), (unsigned long) &rfc);
+					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_EWS:
 			chan->ack_win = min_t(u16, val, chan->ack_win);
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
-					   chan->tx_win);
+					   chan->tx_win, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_EFS:
@@ -3577,7 +3583,7 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
 				return -ECONNREFUSED;
 
 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
-					   (unsigned long) &efs);
+					   (unsigned long) &efs, endptr - ptr);
 			break;
 
 		case L2CAP_CONF_FCS:
@@ -3682,7 +3688,7 @@ void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
 		return;
 
 	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-		       l2cap_build_conf_req(chan, buf), buf);
+		       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
 	chan->num_conf_req++;
 }
 
@@ -3890,7 +3896,7 @@ sendresp:
 		u8 buf[128];
 		set_bit(CONF_REQ_SENT, &chan->conf_state);
 		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-			       l2cap_build_conf_req(chan, buf), buf);
+			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
 		chan->num_conf_req++;
 	}
 
@@ -3968,7 +3974,7 @@ static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
 			break;
 
 		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-			       l2cap_build_conf_req(chan, req), req);
+			       l2cap_build_conf_req(chan, req, sizeof(req)), req);
 		chan->num_conf_req++;
 		break;
 
@@ -4080,7 +4086,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
 	}
 
 	/* Complete config. */
-	len = l2cap_parse_conf_req(chan, rsp);
+	len = l2cap_parse_conf_req(chan, rsp, sizeof(rsp));
 	if (len < 0) {
 		l2cap_send_disconn_req(chan, ECONNRESET);
 		goto unlock;
@@ -4114,7 +4120,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
 	if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) {
 		u8 buf[64];
 		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-			       l2cap_build_conf_req(chan, buf), buf);
+			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
 		chan->num_conf_req++;
 	}
 
@@ -4174,7 +4180,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn,
 			char buf[64];
 
 			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
-						   buf, &result);
+						   buf, sizeof(buf), &result);
 			if (len < 0) {
 				l2cap_send_disconn_req(chan, ECONNRESET);
 				goto done;
@@ -4204,7 +4210,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn,
 			/* throw out any old stored conf requests */
 			result = L2CAP_CONF_SUCCESS;
 			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
-						   req, &result);
+						   req, sizeof(req), &result);
 			if (len < 0) {
 				l2cap_send_disconn_req(chan, ECONNRESET);
 				goto done;
@@ -4781,7 +4787,7 @@ static void l2cap_do_create(struct l2cap_chan *chan, int result,
 			set_bit(CONF_REQ_SENT, &chan->conf_state);
 			l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn),
 				       L2CAP_CONF_REQ,
-				       l2cap_build_conf_req(chan, buf), buf);
+				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
 			chan->num_conf_req++;
 		}
 	}
@@ -7457,7 +7463,7 @@ static void l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
 				set_bit(CONF_REQ_SENT, &chan->conf_state);
 				l2cap_send_cmd(conn, l2cap_get_ident(conn),
 					       L2CAP_CONF_REQ,
-					       l2cap_build_conf_req(chan, buf),
+					       l2cap_build_conf_req(chan, buf, sizeof(buf)),
 					       buf);
 				chan->num_conf_req++;
 			}

net/xfrm/xfrm_policy.c

@@ -3308,9 +3308,15 @@ int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
 	struct xfrm_state *x_new[XFRM_MAX_DEPTH];
 	struct xfrm_migrate *mp;
 
+	/* Stage 0 - sanity checks */
 	if ((err = xfrm_migrate_check(m, num_migrate)) < 0)
 		goto out;
 
+	if (dir >= XFRM_POLICY_MAX) {
+		err = -EINVAL;
+		goto out;
+	}
+
 	/* Stage 1 - find policy */
 	if ((pol = xfrm_migrate_policy_find(sel, dir, type, net)) == NULL) {
 		err = -ENOENT;

security/commoncap.c

@@ -58,7 +58,7 @@ static void warn_setuid_and_fcaps_mixed(const char *fname)
 }
 
 /**
- * cap_capable - Determine whether a task has a particular effective capability
+ * __cap_capable - Determine whether a task has a particular effective capability
  * @cred: The credentials to use
  * @ns:  The user namespace in which we need the capability
  * @cap: The capability to check for
@@ -72,18 +72,11 @@ static void warn_setuid_and_fcaps_mixed(const char *fname)
  * cap_has_capability() returns 0 when a task has a capability, but the
  * kernel's capable() and has_capability() returns 1 for this case.
  */
-int cap_capable(const struct cred *cred, struct user_namespace *targ_ns,
+int __cap_capable(const struct cred *cred, struct user_namespace *targ_ns,
 		int cap, int audit)
 {
 	struct user_namespace *ns = targ_ns;
 
-#ifdef CONFIG_ANDROID_PARANOID_NETWORK
-	if (cap == CAP_NET_RAW && in_egroup_p(AID_NET_RAW))
-		return 0;
-	if (cap == CAP_NET_ADMIN && in_egroup_p(AID_NET_ADMIN))
-		return 0;
-#endif
-
 	/* See if cred has the capability in the target user namespace
 	 * by examining the target user namespace and all of the target
 	 * user namespace's parents.
@@ -114,6 +107,27 @@ int cap_capable(const struct cred *cred, struct user_namespace *targ_ns,
 	/* We never get here */
 }
 
+int cap_capable(const struct cred *cred, struct user_namespace *targ_ns,
+		int cap, int audit)
+{
+	int ret = __cap_capable(cred, targ_ns, cap, audit);
+
+#ifdef CONFIG_ANDROID_PARANOID_NETWORK
+	if (ret != 0 && cap == CAP_NET_RAW && in_egroup_p(AID_NET_RAW)) {
+		printk("Process %s granted CAP_NET_RAW from Android group net_raw.\n", current->comm);
+		printk("  Please update the .rc file to explictly set 'capabilities NET_RAW'\n");
+		printk("  Implicit grants are deprecated and will be removed in the future.\n");
+		return 0;
+	}
+	if (ret != 0 && cap == CAP_NET_ADMIN && in_egroup_p(AID_NET_ADMIN)) {
+		printk("Process %s granted CAP_NET_ADMIN from Android group net_admin.\n", current->comm);
+		printk("  Please update the .rc file to explictly set 'capabilities NET_ADMIN'\n");
+		printk("  Implicit grants are deprecated and will be removed in the future.\n");
+		return 0;
+	}
+#endif
+	return ret;
+}
 /**
  * cap_settime - Determine whether the current process may set the system clock
  * @ts: The time to set

sound/isa/msnd/msnd_midi.c

@@ -120,24 +120,24 @@ void snd_msndmidi_input_read(void *mpuv)
 	unsigned long flags;
 	struct snd_msndmidi *mpu = mpuv;
 	void *pwMIDQData = mpu->dev->mappedbase + MIDQ_DATA_BUFF;
+	u16 head, tail, size;
 
 	spin_lock_irqsave(&mpu->input_lock, flags);
-	while (readw(mpu->dev->MIDQ + JQS_wTail) !=
-	       readw(mpu->dev->MIDQ + JQS_wHead)) {
-		u16 wTmp, val;
-		val = readw(pwMIDQData + 2 * readw(mpu->dev->MIDQ + JQS_wHead));
+	head = readw(mpu->dev->MIDQ + JQS_wHead);
+	tail = readw(mpu->dev->MIDQ + JQS_wTail);
+	size = readw(mpu->dev->MIDQ + JQS_wSize);
+	if (head > size || tail > size)
+		goto out;
+	while (head != tail) {
+		unsigned char val = readw(pwMIDQData + 2 * head);
 
-			if (test_bit(MSNDMIDI_MODE_BIT_INPUT_TRIGGER,
-				     &mpu->mode))
-				snd_rawmidi_receive(mpu->substream_input,
-						    (unsigned char *)&val, 1);
-
-		wTmp = readw(mpu->dev->MIDQ + JQS_wHead) + 1;
-		if (wTmp > readw(mpu->dev->MIDQ + JQS_wSize))
-			writew(0,  mpu->dev->MIDQ + JQS_wHead);
-		else
-			writew(wTmp,  mpu->dev->MIDQ + JQS_wHead);
+		if (test_bit(MSNDMIDI_MODE_BIT_INPUT_TRIGGER, &mpu->mode))
+			snd_rawmidi_receive(mpu->substream_input, &val, 1);
+		if (++head > size)
+			head = 0;
+		writew(head, mpu->dev->MIDQ + JQS_wHead);
 	}
+ out:
 	spin_unlock_irqrestore(&mpu->input_lock, flags);
 }
 EXPORT_SYMBOL(snd_msndmidi_input_read);

sound/isa/msnd/msnd_pinnacle.c

@@ -170,23 +170,24 @@ static irqreturn_t snd_msnd_interrupt(int irq, void *dev_id)
 {
 	struct snd_msnd *chip = dev_id;
 	void *pwDSPQData = chip->mappedbase + DSPQ_DATA_BUFF;
+	u16 head, tail, size;
 
 	/* Send ack to DSP */
 	/* inb(chip->io + HP_RXL); */
 
 	/* Evaluate queued DSP messages */
-	while (readw(chip->DSPQ + JQS_wTail) != readw(chip->DSPQ + JQS_wHead)) {
-		u16 wTmp;
-
-		snd_msnd_eval_dsp_msg(chip,
-			readw(pwDSPQData + 2 * readw(chip->DSPQ + JQS_wHead)));
-
-		wTmp = readw(chip->DSPQ + JQS_wHead) + 1;
-		if (wTmp > readw(chip->DSPQ + JQS_wSize))
-			writew(0, chip->DSPQ + JQS_wHead);
-		else
-			writew(wTmp, chip->DSPQ + JQS_wHead);
+	head = readw(chip->DSPQ + JQS_wHead);
+	tail = readw(chip->DSPQ + JQS_wTail);
+	size = readw(chip->DSPQ + JQS_wSize);
+	if (head > size || tail > size)
+		goto out;
+	while (head != tail) {
+		snd_msnd_eval_dsp_msg(chip, readw(pwDSPQData + 2 * head));
+		if (++head > size)
+			head = 0;
+		writew(head, chip->DSPQ + JQS_wHead);
 	}
+ out:
 	/* Send ack to DSP */
 	inb(chip->io + HP_RXL);
 	return IRQ_HANDLED;

tools/testing/selftests/x86/fsgsbase.c

@@ -285,9 +285,12 @@ static void *threadproc(void *ctx)
 	}
 }
 
-static void set_gs_and_switch_to(unsigned long local, unsigned long remote)
+static void set_gs_and_switch_to(unsigned long local,
+				 unsigned short force_sel,
+				 unsigned long remote)
 {
 	unsigned long base;
+	unsigned short sel_pre_sched, sel_post_sched;
 
 	bool hard_zero = false;
 	if (local == HARD_ZERO) {
@@ -297,6 +300,8 @@ static void set_gs_and_switch_to(unsigned long local, unsigned long remote)
 
 	printf("[RUN]\tARCH_SET_GS(0x%lx)%s, then schedule to 0x%lx\n",
 	       local, hard_zero ? " and clear gs" : "", remote);
+	if (force_sel)
+		printf("\tBefore schedule, set selector to 0x%hx\n", force_sel);
 	if (syscall(SYS_arch_prctl, ARCH_SET_GS, local) != 0)
 		err(1, "ARCH_SET_GS");
 	if (hard_zero)
@@ -307,18 +312,35 @@ static void set_gs_and_switch_to(unsigned long local, unsigned long remote)
 		printf("[FAIL]\tGSBASE wasn't set as expected\n");
 	}
 
+	if (force_sel) {
+		asm volatile ("mov %0, %%gs" : : "rm" (force_sel));
+		sel_pre_sched = force_sel;
+		local = read_base(GS);
+
+		/*
+		 * Signal delivery seems to mess up weird selectors.  Put it
+		 * back.
+		 */
+		asm volatile ("mov %0, %%gs" : : "rm" (force_sel));
+	} else {
+		asm volatile ("mov %%gs, %0" : "=rm" (sel_pre_sched));
+	}
+
 	remote_base = remote;
 	ftx = 1;
 	syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);
 	while (ftx != 0)
 		syscall(SYS_futex, &ftx, FUTEX_WAIT, 1, NULL, NULL, 0);
 
+	asm volatile ("mov %%gs, %0" : "=rm" (sel_post_sched));
 	base = read_base(GS);
-	if (base == local) {
-		printf("[OK]\tGSBASE remained 0x%lx\n", local);
+	if (base == local && sel_pre_sched == sel_post_sched) {
+		printf("[OK]\tGS/BASE remained 0x%hx/0x%lx\n",
+		       sel_pre_sched, local);
 	} else {
 		nerrs++;
-		printf("[FAIL]\tGSBASE changed to 0x%lx\n", base);
+		printf("[FAIL]\tGS/BASE changed from 0x%hx/0x%lx to 0x%hx/0x%lx\n",
+		       sel_pre_sched, local, sel_post_sched, base);
 	}
 }
 
@@ -381,8 +403,15 @@ int main()
 
 	for (int local = 0; local < 4; local++) {
 		for (int remote = 0; remote < 4; remote++) {
-			set_gs_and_switch_to(bases_with_hard_zero[local],
-					     bases_with_hard_zero[remote]);
+			for (unsigned short s = 0; s < 5; s++) {
+				unsigned short sel = s;
+				if (s == 4)
+					asm ("mov %%ss, %0" : "=rm" (sel));
+				set_gs_and_switch_to(
+					bases_with_hard_zero[local],
+					sel,
+					bases_with_hard_zero[remote]);
+			}
 		}
 	}