Johannes Weiner dcd4a049b9 mm: check for no mmaps in exit_mmap() ...

When dup_mmap() ooms we can end up with mm->mmap == NULL.  The error
path does mmput() and unmap_vmas() gets a NULL vma which it
dereferences.

In exit_mmap() there is nothing to do at all for this case, we can
cancel the callpath right there.

[akpm@linux-foundation.org: add sorely-needed comment]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-01-06 15:59:10 -08:00

..

allocpercpu.c

mm/allocpercpu.c: make 4 functions static

2008-07-26 12:00:12 -07:00

backing-dev.c

mm: change dirty limit type specifiers to unsigned long

2009-01-06 15:59:02 -08:00

bootmem.c

misc: replace __FUNCTION__ with __func__

2008-10-16 11:21:30 -07:00

bounce.c

bounce: don't rely on a zeroed bio_vec list

2008-12-29 08:29:52 +01:00

dmapool.c

dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too

2008-04-28 08:58:20 -07:00

fadvise.c

Remove Andrew Morton's old email accounts

2008-10-16 11:21:32 -07:00

failslab.c

SLUB: failslab support

2008-12-29 11:27:46 +02:00

filemap_xip.c

badpage: remove vma from page_remove_rmap

2009-01-06 15:59:07 -08:00

filemap.c

mm: pagecache gfp flags fix

2009-01-06 15:59:09 -08:00

fremap.c

badpage: remove vma from page_remove_rmap

2009-01-06 15:59:07 -08:00

highmem.c

x86, pat: avoid highmem cache attribute aliasing

2008-08-15 17:22:57 +02:00

hugetlb.c

hugetlb: fix sparse warnings

2009-01-06 15:59:06 -08:00

internal.h

mm: make get_user_pages() interruptible

2009-01-06 15:59:08 -08:00

Kconfig

Unevictable LRU Infrastructure

2008-10-20 08:50:26 -07:00

maccess.c

kgdb: fix optional arch functions and probe_kernel_*

2008-04-17 20:05:39 +02:00

madvise.c

madvise: update function comment of madvise_dontneed

2008-07-30 09:41:45 -07:00

Makefile

shmem: unify regular and tiny shmem

2009-01-06 15:59:08 -08:00

memcontrol.c

mm: make mem_cgroup_resize_limit() static

2009-01-06 15:59:04 -08:00

memory_hotplug.c

mm: remove GFP_HIGHUSER_PAGECACHE

2009-01-06 15:59:01 -08:00

memory.c

mm: make get_user_pages() interruptible

2009-01-06 15:59:08 -08:00

mempolicy.c

Merge branch 'master' into next

2008-11-14 11:29:12 +11:00

mempool.c

…

migrate.c

mm: add Set,ClearPageSwapCache stubs

2009-01-06 15:59:02 -08:00

mincore.c

mm: remove nopage

2008-04-28 08:58:18 -07:00

mlock.c

mm: make get_user_pages() interruptible

2009-01-06 15:59:08 -08:00

mm_init.c

mm: mminit_loglevel cannot be __meminitdata anymore

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

mmap.c

mm: check for no mmaps in exit_mmap()

2009-01-06 15:59:10 -08:00

mmu_notifier.c

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

mmzone.c

mm: mark the correct zone as full when scanning zonelists

2008-09-13 14:41:52 -07:00

mprotect.c

mm: cleanup: remove #ifdef CONFIG_MIGRATION

2009-01-06 15:59:00 -08:00

mremap.c

mm: update my address

2009-01-05 17:44:42 -08:00

msync.c

add a vfs_fsync helper

2009-01-05 11:54:28 -05:00

nommu.c

inode->i_op is never NULL

2009-01-05 11:54:28 -05:00

oom_kill.c

oom: print triggering task's cpuset and mems allowed

2009-01-06 15:58:59 -08:00

page_alloc.c

mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGE

2009-01-06 15:59:10 -08:00

page_cgroup.c

mm: make init_section_page_cgroup() static

2009-01-06 15:59:04 -08:00

page_io.c

mm: try_to_free_swap replaces remove_exclusive_swap_page

2009-01-06 15:59:03 -08:00

page_isolation.c

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

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

page-writeback.c

mm: add dirty_background_bytes and dirty_bytes sysctls

2009-01-06 15:59:03 -08:00

pagewalk.c

pagemap: pass mm into pagewalkers

2008-06-12 18:05:41 -07:00

pdflush.c

cpumask: convert mm/

2009-01-01 10:12:29 +10:30

prio_tree.c

…

quicklist.c

mm: size of quicklists shouldn't be proportional to the number of CPUs

2008-09-02 19:21:38 -07:00

readahead.c

vmscan: split LRU lists into anon & file sets

2008-10-20 08:50:25 -07:00

rmap.c

badpage: remove vma from page_remove_rmap

2009-01-06 15:59:07 -08:00

shmem_acl.c

[PATCH] sanitize ->permission() prototype

2008-07-26 20:53:14 -04:00

shmem.c

shmem: unify regular and tiny shmem

2009-01-06 15:59:08 -08:00

slab.c

cpumask: convert mm/

2009-01-01 10:12:29 +10:30

slob.c

slob: do not pass the SLAB flags as GFP in kmem_cache_create()

2008-12-15 16:27:06 -08:00

slub.c

cpumask: convert mm/

2009-01-01 10:12:29 +10:30

sparse-vmemmap.c

vmemmap: warn about page_structs with remote distance

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

sparse.c

meminit section warnings

2008-11-30 10:03:35 -08:00

swap_state.c

mm: remove gfp_mask from add_to_swap

2009-01-06 15:59:04 -08:00

swap.c

mm: try_to_free_swap replaces remove_exclusive_swap_page

2009-01-06 15:59:03 -08:00

swapfile.c

mm: kill page_queue_congested()

2009-01-06 15:59:10 -08:00

thrash.c

…

truncate.c

mmap: handle mlocked pages during map, remap, unmap

2008-10-20 08:52:31 -07:00

util.c

mm: Make generic weak get_user_pages_fast and EXPORT_GPL it

2008-08-12 17:52:53 +10:00

vmalloc.c

mm: vmalloc make lazy unmapping configurable

2009-01-06 15:59:01 -08:00

vmscan.c

vmscan: shrink_active_list(): reduce lru_lock hold time

2009-01-06 15:59:08 -08:00

vmstat.c

cpumask: convert mm/

2009-01-01 10:12:29 +10:30