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179382a06df37b8f330c6b392eed5691476b68b4
linux/mm
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Rik van Riel 2d3f650081 mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages 
commit 12df140f0b upstream.

The h->*_huge_pages counters are protected by the hugetlb_lock, but
alloc_huge_page has a corner case where it can decrement the counter
outside of the lock.

This could lead to a corrupted value of h->resv_huge_pages, which we have
observed on our systems.

Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a
potential race.

Link: https://lkml.kernel.org/r/20221017202505.0e6a4fcd@imladris.surriel.com
Fixes: a88c769548 ("mm: hugetlb: fix hugepage memory leak caused by wrong reserve count")
Signed-off-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Glen McCready <gkmccready@meta.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-06-29 09:27:04 +09:00
..
kasan
kasan: avoid -Wmaybe-uninitialized warning
2023-05-15 12:37:55 +09:00
backing-dev.c
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2023-05-16 12:22:04 +09:00
balloon_compaction.c
…
bootmem.c
…
cleancache.c
…
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
…
debug.c
mm: get rid of vmacache_flush_all() entirely
2023-05-15 08:15:04 +09:00
dmapool.c
…
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
…
filemap.c
mm/filemap.c: clear page error before actual read
2023-05-16 09:16:07 +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
…
gup.c
gup: document and work around "COW can break either way" issue
2023-05-16 12:33:51 +09:00
highmem.c
…
huge_memory.c
gup: document and work around "COW can break either way" issue
2023-05-16 12:33:51 +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
mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages
2023-06-29 09:27:04 +09:00
hwpoison-inject.c
…
init-mm.c
…
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
…
khugepaged.c
khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()
2023-05-16 11:04:11 +09:00
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c
Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"
2023-06-29 09:26:52 +09:00
ksm.c
ksm: fix potential missing rmap_item for stable_node
2023-05-16 11:04:14 +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
uaccess: Add non-pagefault user-space write function
2023-05-16 09:04:44 +09:00
madvise.c
mm: madvise(MADV_DODUMP): allow hugetlbfs pages
2023-05-15 08:33:50 +09:00
Makefile
…
memblock.c
memblock: use kfree() to release kmalloced memblock regions
2023-05-16 12:44:05 +09:00
memcontrol.c
mm/memcontrol: return 1 from cgroup.memory __setup() handler
2023-06-29 09:26:06 +09:00
memory_hotplug.c
mm: Avoid calling build_all_zonelists_init under hotplug context
2023-05-16 08:48:44 +09:00
memory-failure.c
mm: hwpoison: change PageHWPoison behavior on hugetlb pages
2023-05-16 11:14:52 +09:00
memory.c
mm: invalidate hwpoison page cache page in fault path
2023-06-29 09:26:44 +09:00
mempolicy.c
mm/mempolicy: fix uninit-value in mpol_rebind_policy()
2023-06-29 09:26:44 +09:00
mempool.c
…
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
…
mmap.c
mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()
2023-06-29 09:26:53 +09:00
mmu_context.c
…
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
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2023-06-29 09:26:08 +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
mm, oom: do not trigger out_of_memory from the #PF
2023-05-16 12:15:55 +09:00
page_alloc.c
mm: prevent page_frag_alloc() from corrupting the memory
2023-06-29 09:26:55 +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
swap: fix swapfile read/write offset
2023-05-16 10:40:22 +09:00
page_isolation.c
mm: optimize for CMA allocate time
2018-03-05 15:34:36 +08:00
page_owner.c
…
page_poison.c
…
page-writeback.c
mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()
2023-05-16 10:35:27 +09:00
pagewalk.c
mm: pagewalk: fix termination condition in walk_pte_range()
2023-05-16 09:15:23 +09:00
percpu-km.c
…
percpu-vm.c
…
percpu.c
percpu: stop printing kernel addresses
2023-05-15 12:28:14 +09:00
pgtable-generic.c
…
process_vm_access.c
…
quicklist.c
…
readahead.c
Merge branch 'android-4.9' into amlogic-4.9-dev
2018-04-24 17:43:19 +08:00
rmap.c
mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse
2023-06-29 09:26:51 +09:00
shmem.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2023-05-16 12:44:51 +09:00
slab_common.c
mm/slab: use memzero_explicit() in kzfree()
2023-05-16 08:21:55 +09:00
slab.c
mm/slab.c: fix an infinite loop in leaks_show()
2023-05-15 13:47:17 +09:00
slab.h
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
2023-05-16 12:16:34 +09:00
slob.c
UPSTREAM: mm/sl[uo]b: export __kmalloc_track(_node)_caller
2023-05-16 09:44:04 +09:00
slub.c
mm/slub: fix to return errno if kmalloc() fails
2023-06-29 09:26:54 +09:00
sparse-vmemmap.c
…
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
mm: fix swap cache node allocation mask
2023-05-16 08:28:58 +09:00
swap.c
mm: optimize for lowmemory killer
2018-04-17 17:58:08 -08:00
swapfile.c
swap: fix swapfile read/write offset
2023-05-16 10:40:22 +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: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic()
2023-06-29 09:26:14 +09:00
util.c
random: move randomize_page() into mm where it belongs
2023-06-29 09:26:36 +09:00
vmacache.c
Amlogic: sync the code from mainline. [1/1]
2020-02-04 13:48:58 +09:00
vmalloc.c
mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap()
2023-05-15 17:30:45 +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: drop zone->lock in /proc/pagetypeinfo
2023-05-16 11:09:29 +09:00
workingset.c
mm: workingset: fix premature shadow node shrinking with cgroups
2017-04-08 09:30:36 +02:00
z3fold.c
…
zbud.c
…
zpool.c
…
zsmalloc.c
mm/zsmalloc.c: close race window between zs_pool_dec_isolated() and zs_unregister_migration()
2023-05-16 12:15:44 +09:00
zswap.c
zswap: re-check zswap_is_full() after do zswap_shrink()
2023-05-12 17:14:18 +09:00