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Naoya Horiguchi 3e030ecc0f mm/memory-failure.c: fix memory leak by race between poison and unpoison 
When a memory error happens on an in-use page or (free and in-use)
hugepage, the victim page is isolated with its refcount set to one.

When you try to unpoison it later, unpoison_memory() calls put_page()
for it twice in order to bring the page back to free page pool (buddy or
free hugepage list).  However, if another memory error occurs on the
page which we are unpoisoning, memory_failure() returns without
releasing the refcount which was incremented in the same call at first,
which results in memory leak and unconsistent num_poisoned_pages
statistics.  This patch fixes it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: <stable@vger.kernel.org>    [2.6.32+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-05-23 09:37:30 -07:00
..
Kconfig parisc,metag: Do not hardcode maximum userspace stack size 2014-05-15 00:01:41 +01:00
Kconfig.debug
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Makefile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-04-12 14:49:50 -07:00
backing-dev.c bdi: avoid oops on device removal 2014-04-03 16:20:49 -07:00
balloon_compaction.c
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bootmem.c
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bounce.c
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cleancache.c
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compaction.c mm/compaction: make isolate_freepages start at pageblock boundary 2014-05-06 13:04:59 -07:00
debug-pagealloc.c
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dmapool.c
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early_ioremap.c mm: create generic early_ioremap() support 2014-04-07 16:36:15 -07:00
fadvise.c
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failslab.c
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filemap.c mm/filemap.c: avoid always dirtying mapping->flags on O_DIRECT 2014-05-23 09:37:29 -07:00
filemap_xip.c
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fremap.c
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frontswap.c
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highmem.c
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huge_memory.c thp: close race between split and zap huge pages 2014-04-18 16:40:09 -07:00
hugetlb.c hugetlb: ensure hugepage access is denied if hugepages are not supported 2014-05-06 13:04:58 -07:00
hugetlb_cgroup.c
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hwpoison-inject.c
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init-mm.c
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internal.h mm/readahead.c: inline ra_submit 2014-04-07 16:35:58 -07:00
interval_tree.c
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iov_iter.c take iov_iter stuff to mm/iov_iter.c 2014-04-01 23:19:30 -04:00
kmemcheck.c
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kmemleak-test.c
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kmemleak.c mm: postpone the disabling of kmemleak early logging 2014-05-11 17:55:48 +09:00
ksm.c
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list_lru.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
maccess.c
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madvise.c mm: madvise: fix MADV_WILLNEED on shmem swapouts 2014-05-23 09:37:29 -07:00
memblock.c mm/memblock.c: use PFN_PHYS() 2014-04-07 16:35:58 -07:00
memcontrol.c memcg: fix swapcache charge from kernel thread context 2014-05-23 09:37:29 -07:00
memory-failure.c mm/memory-failure.c: fix memory leak by race between poison and unpoison 2014-05-23 09:37:30 -07:00
memory.c mm: split 'tlb_flush_mmu()' into tlb flushing and memory freeing parts 2014-04-25 16:05:40 -07:00
memory_hotplug.c
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mempolicy.c mm, mempolicy: remove per-process flag 2014-04-07 16:35:54 -07:00
mempool.c mempool: add unlikely and likely hints 2014-04-07 16:35:55 -07:00
migrate.c
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mincore.c mm + fs: prepare for non-page entries in page cache radix trees 2014-04-03 16:21:00 -07:00
mlock.c mm: try_to_unmap_cluster() should lock_page() before mlocking 2014-04-07 16:35:57 -07:00
mm_init.c
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mmap.c mm: per-thread vma caching 2014-04-07 16:35:53 -07:00
mmu_context.c
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mmu_notifier.c
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mmzone.c
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mprotect.c mm: move mmu notifier call from change_protection to change_pmd_range 2014-04-07 16:35:50 -07:00
mremap.c mm, thp: close race between mremap() and split_huge_page() 2014-05-11 17:55:48 +09:00
msync.c
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nobootmem.c mm/nobootmem.c: mark function as static 2014-04-03 16:21:02 -07:00
nommu.c mm: fix 'ERROR: do not initialise globals to 0 or NULL' and coding style 2014-04-07 16:35:55 -07:00
oom_kill.c
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page-writeback.c mm/page-writeback.c: fix divide by zero in pos_ratio_polynom 2014-05-06 13:04:58 -07:00
page_alloc.c mm/page_alloc.c: change mm debug routines back to EXPORT_SYMBOL 2014-04-07 16:35:59 -07:00
page_cgroup.c mm/page_cgroup.c: mark functions as static 2014-04-03 16:21:02 -07:00
page_io.c
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page_isolation.c
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pagewalk.c
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percpu-km.c
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percpu-vm.c
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percpu.c percpu: make pcpu_alloc_chunk() use pcpu_mem_free() instead of kfree() 2014-04-14 16:18:06 -04:00
pgtable-generic.c
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process_vm_access.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-04-12 14:49:50 -07:00
quicklist.c
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readahead.c mm/readahead.c: inline ra_submit 2014-04-07 16:35:58 -07:00
rmap.c mm: try_to_unmap_cluster() should lock_page() before mlocking 2014-04-07 16:35:57 -07:00
shmem.c mm: Initialize error in shmem_file_aio_read() 2014-04-13 14:10:26 -07:00
slab.c slab: Fix off by one in object max number tests. 2014-05-05 20:38:49 -07:00
slab.h slub: use sysfs'es release mechanism for kmem_cache 2014-05-06 13:04:59 -07:00
slab_common.c slub: use sysfs'es release mechanism for kmem_cache 2014-05-06 13:04:59 -07:00
slob.c mm: slab/slub: use page->list consistently instead of page->lru 2014-04-11 10:06:06 +03:00
slub.c slub: use sysfs'es release mechanism for kmem_cache 2014-05-06 13:04:59 -07:00
sparse-vmemmap.c
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sparse.c mm: use macros from compiler.h instead of __attribute__((...)) 2014-04-07 16:35:54 -07:00
swap.c mm: thrash detection-based file cache sizing 2014-04-03 16:21:01 -07:00
swap_state.c
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swapfile.c
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truncate.c mm: filemap: update find_get_pages_tag() to deal with shadow entries 2014-05-06 13:04:59 -07:00
util.c nick kvfree() from apparmor 2014-05-06 14:02:53 -04:00
vmacache.c mm: don't pointlessly use BUG_ON() for sanity check 2014-04-28 14:24:09 -07:00
vmalloc.c mm/vmalloc.c: enhance vm_map_ram() comment 2014-04-07 16:35:55 -07:00
vmpressure.c
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vmscan.c revert "mm: vmscan: do not swap anon pages just because free+file is low" 2014-05-06 13:04:59 -07:00
vmstat.c CPU hotplug notifiers registration fixes for 3.15-rc1 2014-04-07 14:55:46 -07:00
workingset.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
zbud.c
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zsmalloc.c
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zswap.c Merge branch 'akpm' (incoming from Andrew) 2014-04-07 16:38:06 -07:00