Oleg Nesterov 31f2b0ebc0 rmap: anon_vma_prepare() can leak anon_vma_chain ...

If find_mergeable_anon_vma() succeeds but another thread installs
->anon_vma before we take ptl, then allocated == NULL but avc should be
freed.  Change the code to check avc != NULL to detect this case.

Also, a couple of whitespace changes to make the critical section more
visible.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2010-04-24 11:31:25 -07:00

..

backing-dev.c

backing-dev: Handle class_create() failure

2010-04-02 09:46:55 +02:00

bootmem.c

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip

2010-04-07 11:02:23 -07:00

bounce.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

debug-pagealloc.c

generic debug pagealloc

2009-04-01 08:59:13 -07:00

dmapool.c

dmapools: protect page_list walk in show_pools()

2009-06-30 18:56:00 -07:00

fadvise.c

readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM

2010-03-06 11:26:25 -08:00

failslab.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

filemap_xip.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

filemap.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

fremap.c

mm: clean up mm_counter

2010-03-06 11:26:23 -08:00

highmem.c

grammar fix in comment

2010-02-05 12:22:40 +01:00

hugetlb.c

hugetlb: fix infinite loop in get_futex_key() when backed by huge pages

2010-04-24 11:31:25 -07:00

hwpoison-inject.c

HWPOISON: Don't do early filtering if filter is disabled

2009-12-16 12:20:01 +01:00

init-mm.c

mm: consolidate init_mm definition

2009-06-16 19:47:28 -07:00

internal.h

HWPOISON: add an interface to switch off/on all the page filters

2009-12-16 12:19:59 +01:00

Kconfig

Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-03-03 08:15:05 -08:00

Kconfig.debug

trivial: improve help text for mm debug config options

2009-09-21 15:14:57 +02:00

kmemcheck.c

kmemcheck: Fix build errors due to missing slab.h

2010-03-30 22:02:32 +09:00

kmemleak-test.c

percpu: clean up percpu variable definitions

2009-06-24 15:13:48 +09:00

kmemleak.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

ksm.c

mm/ksm.c is doing an unneeded _notify in write_protect_page.

2010-03-24 16:31:20 -07:00

maccess.c

maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write)

2010-01-07 11:58:36 -06:00

madvise.c

HWPOISON: Add a madvise() injector for soft page offlining

2009-12-16 12:20:00 +01:00

Makefile

percpu: don't implicitly include slab.h from percpu.h

2010-03-30 22:02:32 +09:00

memcontrol.c

memcg: fix prepare migration

2010-04-24 11:31:24 -07:00

memory_hotplug.c

mm: introduce dump_page() and print symbolic flag names

2010-03-12 15:52:28 -08:00

memory-failure.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

memory.c

mm: avoid null-pointer deref in sync_mm_rss()

2010-04-07 08:38:02 -07:00

mempolicy.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

mempool.c

mm: remove broken 'kzalloc' mempool

2009-09-22 07:17:35 -07:00

migrate.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

mincore.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

mlock.c

mm: use rlimit helpers

2010-03-06 11:26:24 -08:00

mm_init.c

mm: mminit_loglevel cannot be __meminitdata anymore

2008-08-20 15:40:30 -07:00

mmap.c

vma_adjust: fix the copying of anon_vma chains

2010-04-12 17:54:11 -07:00

mmu_context.c

exit: fix oops in sync_mm_rss

2010-03-24 16:31:21 -07:00

mmu_notifier.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

mmzone.c

[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2

2009-05-18 11:22:24 +01:00

mprotect.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

mremap.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

msync.c

[CVE-2009-0029] System call wrappers part 13

2009-01-14 14:15:23 +01:00

nommu.c

NOMMU: Fix __get_user_pages() to pin last page on offset buffers

2010-03-25 14:13:27 -07:00

oom_kill.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

page_alloc.c

mm: introduce dump_page() and print symbolic flag names

2010-03-12 15:52:28 -08:00

page_cgroup.c

memcg: avoid use cmpxchg in swap cgroup maintainance

2010-03-17 18:43:47 -07:00

page_io.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

page_isolation.c

memory hotplug: fix page_zone() calculation in test_pages_isolated()

2008-11-06 15:41:19 -08:00

page-writeback.c

writeback: remove unused nonblocking and congestion checks

2009-12-03 13:54:25 +01:00

pagewalk.c

pagemap: fix pfn calculation for hugepage

2010-04-07 08:38:04 -07:00

percpu_up.c

percpu: don't implicitly include slab.h from percpu.h

2010-03-30 22:02:32 +09:00

percpu.c

percpu, module: implement and use is_kernel/module_percpu_address()

2010-03-29 23:07:12 +09:00

prio_tree.c

spelling fixes: mm/

2007-10-20 01:27:18 +02:00

quicklist.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

readahead.c

readahead: fix NULL filp dereference

2010-04-07 08:38:03 -07:00

rmap.c

rmap: anon_vma_prepare() can leak anon_vma_chain

2010-04-24 11:31:25 -07:00

shmem.c

Fix breakage in shmem.c

2009-12-16 19:48:48 -05:00

slab.c

slab: Generify kernel pointer validation

2010-04-09 10:09:50 -07:00

slob.c

slab: remove duplicate kmem_cache_init_late() declarations

2009-08-06 11:36:25 +03:00

slub.c

slub: Fix kmem_ptr_validate() for non-kernel pointers

2010-04-09 10:09:50 -07:00

sparse-vmemmap.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

sparse.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

swap_state.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

swap.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

swapfile.c

memcg: move charges of anonymous swap

2010-03-12 15:52:36 -08:00

thrash.c

mm: pass mm to grab_swap_token

2009-06-23 12:50:05 -07:00

truncate.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

util.c

slab: Generify kernel pointer validation

2010-04-09 10:09:50 -07:00

vmalloc.c

mm: purge fragmented percpu vmap blocks

2010-02-02 12:50:47 -08:00

vmscan.c

mm: revert "vmscan: get_scan_ratio() cleanup"

2010-04-07 08:38:03 -07:00

vmstat.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00