Randy Dunlap 89c4e59af2 mm: mempolicy: require at least one nodeid for MPOL_PREFERRED ...

commit aa9f7d5172 upstream.

Using an empty (malformed) nodelist that is not caught during mount option
parsing leads to a stack-out-of-bounds access.

The option string that was used was: "mpol=prefer:,".  However,
MPOL_PREFERRED requires a single node number, which is not being provided
here.

Add a check that 'nodes' is not empty after parsing for MPOL_PREFERRED's
nodeid.

Fixes: 095f1fc4eb ("mempolicy: rework shmem mpol parsing and display")
Reported-by: Entropy Moe <3ntr0py1337@gmail.com>
Reported-by: syzbot+b055b1a6b2b958707a21@syzkaller.appspotmail.com
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: syzbot+b055b1a6b2b958707a21@syzkaller.appspotmail.com
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Link: http://lkml.kernel.org/r/89526377-7eb6-b662-e1d8-4430928abde9@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-05-15 17:13:04 +09:00

..

kasan

kasan: avoid -Wmaybe-uninitialized warning

2023-05-15 12:37:55 +09:00

backing-dev.c

writeback: synchronize sync(2) against cgroup writeback membership switches

2023-05-15 12:52:00 +09:00

balloon_compaction.c

mm: balloon: use general non-lru movable page feature

2016-07-26 16:19:19 -07:00

bootmem.c

mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping

2016-10-11 15:06:33 -07:00

cleancache.c

cleancache: constify cleancache_ops structure

2016-01-27 09:09:57 -05:00

cma_debug.c

mm/cma_debug.c: fix the break condition in cma_maxchunk_get()

2023-05-15 13:47:15 +09:00

cma.c

mm/cma.c: fail if fixed declaration can't be honored

2023-05-15 14:09:18 +09:00

cma.h

codec_mm: add reserved & cma support for 4.9. [1/1]

2018-11-05 05:36:36 -07:00

compaction.c

Amlogic: sync the code from mainline. [1/1]

2020-02-04 13:48:58 +09:00

debug_page_ref.c

mm/page_ref: add tracepoint to track down page reference manipulation

2016-03-17 15:09:34 -07:00

debug.c

mm: get rid of vmacache_flush_all() entirely

2023-05-15 08:15:04 +09:00

dmapool.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

early_ioremap.c

mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep

2018-02-25 11:05:49 +01:00

fadvise.c

mm/fadvise.c: fix signed overflow UBSAN complaint

2023-05-12 17:25:57 +09:00

failslab.c

mm: fault-inject take over bootstrap kmem_cache check

2016-03-15 16:55:16 -07:00

filemap.c

mm/filemap.c: don't initiate writeback if mapping has no dirty pages

2023-05-15 14:59:23 +09:00

frame_vector.c

mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'

2023-05-15 09:13:14 +09:00

frontswap.c

mm, frontswap: convert frontswap_enabled to static key

2016-07-26 16:19:19 -07:00

gup.c

mm: prevent get_user_pages() from overflowing page refcount

2023-05-15 13:40:39 +09:00

highmem.c

mm/highmem: make nr_free_highpages() handles all highmem zones by itself

2016-05-19 19:12:14 -07:00

huge_memory.c

mm/huge_memory.c: use head to check huge zero page

2023-05-15 17:02:08 +09:00

hugetlb_cgroup.c

mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()

2023-05-15 15:07:45 +09:00

hugetlb.c

hugetlbfs: on restore reserve error path retain subpool reservation

2023-05-15 13:47:09 +09:00

hwpoison-inject.c

…

init-mm.c

mm: Add a user_ns owner to mm_struct and fix ptrace permission checks

2017-01-06 10:40:13 +01:00

internal.h

vmscan: return NODE_RECLAIM_NOSCAN in node_reclaim() when CONFIG_NUMA is n

2023-05-15 16:07:45 +09:00

interval_tree.c

…

Kconfig

mm: don't allow deferred pages with NEED_PER_CPU_KM

2018-05-22 16:57:57 +02:00

Kconfig.debug

PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO

2016-09-13 02:35:27 +02:00

khugepaged.c

coredump: fix race condition between collapse_huge_page() and core dumping

2023-05-15 14:09:44 +09:00

kmemcheck.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak-test.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

kmemleak.c

mm/kmemleak.c: fix check for softirq context

2023-05-15 14:08:12 +09:00

ksm.c

mm/ksm.c: don't WARN if page is still mapped in remove_stable_node()

2023-05-15 15:17:03 +09:00

list_lru.c

mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node

2023-05-15 13:48:37 +09:00

maccess.c

x86: remove more uaccess_32.h complexity

2016-05-22 17:21:27 -07:00

madvise.c

mm: madvise(MADV_DODUMP): allow hugetlbfs pages

2023-05-15 08:33:50 +09:00

Makefile

Disable the __builtin_return_address() warning globally after all

2016-10-12 10:23:41 -07:00

memblock.c

mm/memblock.c: reversed logic in memblock_discard()

2017-08-30 10:21:47 +02:00

memcontrol.c

memcg: fix NULL pointer dereference in __mem_cgroup_usage_unregister_event

2023-05-15 17:11:02 +09:00

memory_hotplug.c

mm/memory_hotplug: make add_memory() take the device_hotplug_lock

2023-05-15 15:18:31 +09:00

memory-failure.c

mm: hwpoison: fix thp split handing in soft_offline_in_use_page()

2023-05-15 12:06:12 +09:00

memory.c

mm: stop leaking PageTables

2023-05-15 11:34:46 +09:00

mempolicy.c

mm: mempolicy: require at least one nodeid for MPOL_PREFERRED

2023-05-15 17:13:04 +09:00

mempool.c

Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"

2016-07-28 16:07:41 -07:00

memtest.c

…

migrate.c

hugetlbfs: fix races and page leaks during migration

2023-05-15 11:50:08 +09:00

mincore.c

mm/mincore.c: make mincore() more conservative

2023-05-15 12:51:27 +09:00

mlock.c

mm/mlock.c: change count_mm_mlocked_page_nr return type

2023-05-15 13:56:52 +09:00

mm_init.c

mm: convert printk(KERN_<LEVEL> to pr_<level>

2016-03-17 15:09:34 -07:00

mmap.c

arm64: Revert support for execute-only user mappings

2023-05-15 16:30:39 +09:00

mmu_context.c

mm/mmu_context, sched/core: Fix mmu_context.h assumption

2016-04-28 11:44:19 +02:00

mmu_notifier.c

mm/mmu_notifier: use hlist_add_head_rcu()

2023-05-15 14:08:15 +09:00

mmzone.c

mm: optimize for lowmemory killer

2018-04-17 17:58:08 -08:00

mprotect.c

x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings

2023-05-12 16:53:04 +09:00

mremap.c

mremap: properly flush TLB before releasing the page (CVE-2018-18281)

2020-12-17 17:23:22 +09:00

msync.c

…

nobootmem.c

mm: discard memblock data later

2017-08-24 17:12:19 -07:00

nommu.c

x86/mm: split vmalloc_sync_all()

2023-05-15 17:11:06 +09:00

oom_kill.c

oom, oom_reaper: do not enqueue same task twice

2023-05-15 11:24:09 +09:00

page_alloc.c

mem-hotplug: fix node spanned pages when we have a node with only ZONE_MOVABLE

2023-05-15 13:47:11 +09:00

page_counter.c

…

page_ext.c

mm/page_ext.c: fix an imbalance with kmemleak

2023-05-15 12:16:51 +09:00

page_idle.c

mm/page_idle.c: fix oops because end_pfn is larger than max_pfn

2023-05-15 13:56:01 +09:00

page_io.c

mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE()

2016-10-07 18:46:29 -07:00

page_isolation.c

mm: optimize for CMA allocate time

2018-03-05 15:34:36 +08:00

page_owner.c

mm/page_owner: don't define fields on struct page_ext by hard-coding

2016-10-07 18:46:27 -07:00

page_poison.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

page-writeback.c

mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()

2023-05-15 16:35:10 +09:00

pagewalk.c

mm/pagewalk.c: report holes in hugetlb ranges

2017-11-24 08:33:42 +01:00

percpu-km.c

mm: percpu: use pr_fmt to prefix output

2016-03-17 15:09:34 -07:00

percpu-vm.c

…

percpu.c

percpu: stop printing kernel addresses

2023-05-15 12:28:14 +09:00

pgtable-generic.c

mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range

2016-03-17 15:09:34 -07:00

process_vm_access.c

mm: remove write/force parameters from __get_user_pages_unlocked()

2016-10-18 14:13:37 -07:00

quicklist.c

fix Christoph's email addresses

2016-03-17 15:09:34 -07:00

readahead.c

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

2018-04-24 17:43:19 +08:00

rmap.c

mm: migration: fix migration of huge PMD shared pages

2023-05-15 09:27:49 +09:00

shmem.c

mm/shmem.c: cast the type of unmap_start to u64

2023-05-15 16:17:19 +09:00

slab_common.c

mm: don't warn about large allocations for slab

2023-05-15 09:57:36 +09:00

slab.c

mm/slab.c: fix an infinite loop in leaks_show()

2023-05-15 13:47:17 +09:00

slab.h

slub: move synchronize_sched out of slab_mutex on shrink

2017-03-22 12:43:38 +01:00

slob.c

slub: move synchronize_sched out of slab_mutex on shrink

2017-03-22 12:43:38 +01:00

slub.c

mm, slub: prevent kmalloc_node crashes and memory leaks

2023-05-15 17:11:04 +09:00

sparse-vmemmap.c

treewide: replace obsolete _refok by __ref

2016-08-02 17:31:41 -04:00

sparse.c

mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next

2017-10-21 17:21:36 +02:00

swap_cgroup.c

mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()

2017-07-05 14:40:17 +02:00

swap_state.c

Amlogic: sync the code from mainline. [1/1]

2020-02-04 13:48:58 +09:00

swap.c

mm: optimize for lowmemory killer

2018-04-17 17:58:08 -08:00

swapfile.c

x86/speculation/l1tf: Limit swap file size to MAX_PA/2

2023-05-12 16:53:07 +09:00

truncate.c

mm: cleancache: fix corruption on missed inode invalidation

2023-05-15 10:06:15 +09:00

usercopy.c

usercopy: Avoid HIGHMEM pfn warning

2023-05-15 14:47:39 +09:00

userfaultfd.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

util.c

mm: page_mapped: don't assume compound page is huge or THP

2023-05-15 11:00:59 +09:00

vmacache.c

Amlogic: sync the code from mainline. [1/1]

2020-02-04 13:48:58 +09:00

vmalloc.c

x86/mm: split vmalloc_sync_all()

2023-05-15 17:11:06 +09:00

vmpressure.c

mm: vmpressure: fix sending wrong events on underflow

2017-03-12 06:41:43 +01:00

vmscan.c

mm: remove seemingly spurious reclaimability check from laptop_mode gating

2023-05-15 08:11:03 +09:00

vmstat.c

mm, vmstat: hide /proc/pagetypeinfo from normal users

2023-05-15 14:57:51 +09:00

workingset.c

mm: workingset: fix premature shadow node shrinking with cgroups

2017-04-08 09:30:36 +02:00

z3fold.c

mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup

2016-06-03 16:02:55 -07:00

zbud.c

mm/zbud.c: use list_last_entry() instead of list_tail_entry()

2016-01-15 11:40:52 -08:00

zpool.c

…

zsmalloc.c

mm/zsmalloc.c: fix the migrated zspage statistics.

2023-05-15 16:30:22 +09:00

zswap.c

zswap: re-check zswap_is_full() after do zswap_shrink()

2023-05-12 17:14:18 +09:00