shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 03:15:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

Merge 60115fa54a ("mm: defer kmemleak object creation of module_alloc()") into android-mainline

Browse Source 
Steps on the way to 5.17-rc1

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I2ec342d4b0cd04807ed02da5262c92bdcaa6d8fd
This commit is contained in:
Greg Kroah-Hartman
2022-02-09 14:44:38 +01:00
parent d852df7a72 60115fa54a
commit 9d42df3abe
7 changed files with 27 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kernel/module.c
View File

@@ -36,7 +36,7 @@ void *module_alloc(unsigned long size)
module_alloc_end = MODULES_END;
p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
module_alloc_end, gfp_mask, PAGE_KERNEL, 0,
module_alloc_end, gfp_mask, PAGE_KERNEL, VM_DEFER_KMEMLEAK,
NUMA_NO_NODE, __builtin_return_address(0));
if (!p && IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) &&
@@ -58,7 +58,7 @@ void *module_alloc(unsigned long size)
PAGE_KERNEL, 0, NUMA_NO_NODE,
__builtin_return_address(0));
if (p && (kasan_module_alloc(p, size) < 0)) {
if (p && (kasan_module_alloc(p, size, gfp_mask) < 0)) {
vfree(p);
return NULL;
}

5
arch/s390/kernel/module.c
View File

@@ -37,14 +37,15 @@
void *module_alloc(unsigned long size)
{
gfp_t gfp_mask = GFP_KERNEL;
void *p;
if (PAGE_ALIGN(size) > MODULES_LEN)
return NULL;
p = __vmalloc_node_range(size, MODULE_ALIGN, MODULES_VADDR, MODULES_END,
GFP_KERNEL, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
gfp_mask, PAGE_KERNEL_EXEC, VM_DEFER_KMEMLEAK, NUMA_NO_NODE,
__builtin_return_address(0));
if (p && (kasan_module_alloc(p, size) < 0)) {
if (p && (kasan_module_alloc(p, size, gfp_mask) < 0)) {
vfree(p);
return NULL;
}

7
arch/x86/kernel/module.c
View File

@@ -67,6 +67,7 @@ static unsigned long int get_module_load_offset(void)
void *module_alloc(unsigned long size)
{
gfp_t gfp_mask = GFP_KERNEL;
void *p;
if (PAGE_ALIGN(size) > MODULES_LEN)
@@ -74,10 +75,10 @@ void *module_alloc(unsigned long size)
p = __vmalloc_node_range(size, MODULE_ALIGN,
MODULES_VADDR + get_module_load_offset(),
MODULES_END, GFP_KERNEL,
PAGE_KERNEL, 0, NUMA_NO_NODE,
MODULES_END, gfp_mask,
PAGE_KERNEL, VM_DEFER_KMEMLEAK, NUMA_NO_NODE,
__builtin_return_address(0));
if (p && (kasan_module_alloc(p, size) < 0)) {
if (p && (kasan_module_alloc(p, size, gfp_mask) < 0)) {
vfree(p);
return NULL;
}

4
include/linux/kasan.h
View File

@@ -475,12 +475,12 @@ static inline void kasan_populate_early_vm_area_shadow(void *start,
* allocations with real shadow memory. With KASAN vmalloc, the special
* case is unnecessary, as the work is handled in the generic case.
*/
int kasan_module_alloc(void *addr, size_t size);
int kasan_module_alloc(void *addr, size_t size, gfp_t gfp_mask);
void kasan_free_shadow(const struct vm_struct *vm);
#else /* (CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS) && !CONFIG_KASAN_VMALLOC */
static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
static inline int kasan_module_alloc(void *addr, size_t size, gfp_t gfp_mask) { return 0; }
static inline void kasan_free_shadow(const struct vm_struct *vm) {}
#endif /* (CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS) && !CONFIG_KASAN_VMALLOC */

7
include/linux/vmalloc.h
View File

@@ -28,6 +28,13 @@ struct notifier_block; /* in notifier.h */
#define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */
#define VM_NO_HUGE_VMAP 0x00000400 /* force PAGE_SIZE pte mapping */
#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \
!defined(CONFIG_KASAN_VMALLOC)
#define VM_DEFER_KMEMLEAK 0x00000800 /* defer kmemleak object creation */
#else
#define VM_DEFER_KMEMLEAK 0
#endif
/*
* VM_KASAN is used slightly differently depending on CONFIG_KASAN_VMALLOC.
*

9
mm/kasan/shadow.c
View File

@@ -498,7 +498,7 @@ void kasan_release_vmalloc(unsigned long start, unsigned long end,
#else /* CONFIG_KASAN_VMALLOC */
int kasan_module_alloc(void *addr, size_t size)
int kasan_module_alloc(void *addr, size_t size, gfp_t gfp_mask)
{
void *ret;
size_t scaled_size;
@@ -520,9 +520,14 @@ int kasan_module_alloc(void *addr, size_t size)
__builtin_return_address(0));
if (ret) {
struct vm_struct *vm = find_vm_area(addr);
__memset(ret, KASAN_SHADOW_INIT, shadow_size);
find_vm_area(addr)->flags |= VM_KASAN;
vm->flags |= VM_KASAN;
kmemleak_ignore(ret);
if (vm->flags & VM_DEFER_KMEMLEAK)
kmemleak_vmalloc(vm, size, gfp_mask);
return 0;
}

3
mm/vmalloc.c
View File

@@ -3074,7 +3074,8 @@ again:
clear_vm_uninitialized_flag(area);
size = PAGE_ALIGN(size);
kmemleak_vmalloc(area, size, gfp_mask);
if (!(vm_flags & VM_DEFER_KMEMLEAK))
kmemleak_vmalloc(area, size, gfp_mask);
return addr;