Li Zefan 091d0d55b2 shm: fix null pointer deref when userspace specifies invalid hugepage size ...

Dave reported an oops triggered by trinity:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  IP: newseg+0x10d/0x390
  PGD cf8c1067 PUD cf8c2067 PMD 0
  Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
  CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+#67
  ...
  Call Trace:
    ipcget+0x182/0x380
    SyS_shmget+0x5a/0x60
    tracesys+0xdd/0xe2

This bug was introduced by commit af73e4d9506d ("hugetlbfs: fix mmap
failure in unaligned size request").

Reported-by: Dave Jones <davej@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Li Zefan <lizfan@huawei.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-05-09 14:22:47 -07:00

..

backing-dev.c

writeback: expose the bdi_wq workqueue

2013-04-01 19:08:06 -07:00

balloon_compaction.c

mm: introduce a common interface for balloon pages mobility

2012-12-11 17:22:26 -08:00

bootmem.c

mm: Add alloc_bootmem_low_pages_nopanic()

2013-01-29 19:32:59 -08:00

bounce.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

cleancache.c

mm: cleancache: clean up cleancache_enabled

2013-04-30 17:04:01 -07:00

compaction.c

mm: add & use zone_end_pfn() and zone_spans_pfn()

2013-02-23 17:50:20 -08:00

debug-pagealloc.c

mm, x86: Remove debug_pagealloc_enabled

2011-12-06 09:24:07 +01:00

dmapool.c

dmapool: make DMAPOOL_DEBUG detect corruption of free marker

2012-12-11 17:22:24 -08:00

fadvise.c

teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long

2013-03-03 22:46:22 -05:00

failslab.c

switch debugfs to umode_t

2012-01-03 22:54:56 -05:00

filemap_xip.c

lift sb_start_write() out of ->write()

2013-04-09 14:12:56 -04:00

filemap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

fremap.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -07:00

frontswap.c

frontswap: get rid of swap_lock dependency

2013-04-30 17:04:00 -07:00

highmem.c

Some nice cleanups, and even a patch my wife did as a "live" demo for

2012-12-20 08:37:05 -08:00

huge_memory.c

thp: fix huge zero page logic for page with pfn == 0

2013-04-29 15:54:39 -07:00

hugetlb_cgroup.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

2012-12-18 15:02:15 -08:00

hugetlb.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-04-30 09:36:50 -07:00

hwpoison-inject.c

memcg: rename config variables

2012-07-31 18:42:43 -07:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm: accelerate munlock() treatment of THP pages

2013-02-27 19:10:09 -08:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

2012-10-09 16:22:42 +09:00

Kconfig

mmKconfig: add an option to disable bounce

2013-04-29 15:54:40 -07:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

kmemcheck: Fix build errors due to missing slab.h

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

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

ksm.c

ksm: fix m68k build: only NUMA needs pfn_to_nid

2013-03-08 15:05:34 -08:00

maccess.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

madvise.c

mm: madvise: complete input validation before taking lock

2013-04-29 15:54:37 -07:00

Makefile

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

memblock.c

memblock: fix missing comment of memblock_insert_region()

2013-04-29 15:54:38 -07:00

memcontrol.c

mm, memcg: add rss_huge stat to memory.stat

2013-05-07 18:38:26 -07:00

memory_hotplug.c

mm: fix memory_hotplug.c printk format warning

2013-04-29 15:54:39 -07:00

memory-failure.c

HWPOISON: check dirty flag to match against clean page

2013-04-29 15:54:28 -07:00

memory.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-04-30 09:36:50 -07:00

mempolicy.c

mm/mempolicy.c: fix sp_node_init() argument ordering

2013-03-08 15:05:34 -08:00

mempool.c

mempool: add @gfp_mask to mempool_create_node()

2012-06-25 11:53:47 +02:00

migrate.c

mm: rewrite the comment over migrate_pages() more comprehensibly

2013-04-29 15:54:37 -07:00

mincore.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

mlock.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -07:00

mm_init.c

mm: init: report on last-nid information stored in page->flags

2013-02-23 17:50:18 -08:00

mmap.c

shm: fix null pointer deref when userspace specifies invalid hugepage size

2013-05-09 14:22:47 -07:00

mmu_context.c

mm: remove old aio use_mm() comment

2013-05-07 18:38:27 -07:00

mmu_notifier.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

mmzone.c

mm: rename page struct field helpers

2013-02-23 17:50:18 -08:00

mprotect.c

mm/mprotect.c: coding-style cleanups

2012-12-18 15:02:15 -08:00

mremap.c

mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()

2013-02-23 17:50:17 -08:00

msync.c

sanitize vfs_fsync calling conventions

2010-05-21 18:31:21 -04:00

nobootmem.c

mm, nobootmem: do memset() after memblock_reserve()

2013-04-29 15:54:39 -07:00

nommu.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2013-05-01 07:21:43 -07:00

oom_kill.c

memcg, oom: provide more precise dump info while memcg oom happening

2013-02-23 17:50:08 -08:00

page_alloc.c

page_alloc: make setup_nr_node_ids() usable for arch init code

2013-04-29 15:54:36 -07:00

page_cgroup.c

memcontrol: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

page_io.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

page_isolation.c

mm: fix zone_watermark_ok_safe() accounting of isolated pages

2013-01-04 16:11:46 -08:00

page-writeback.c

mm: make snapshotting pages for stable writes a per-bio operation

2013-04-29 15:54:33 -07:00

pagewalk.c

thp: change split_huge_page_pmd() interface

2012-12-12 17:38:31 -08:00

percpu-km.c

percpu: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

percpu-vm.c

mm: fix kernel-doc warnings

2012-06-20 14:39:36 -07:00

percpu.c

mm, percpu: Make sure percpu_alloc early parameter has an argument

2012-12-02 06:23:04 -08:00

pgtable-generic.c

mm: Only flush the TLB when clearing an accessible pte

2012-12-11 14:28:34 +00:00

process_vm_access.c

Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys

2013-03-12 11:05:45 -07:00

quicklist.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

readahead.c

teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long

2013-03-03 22:46:22 -05:00

rmap.c

rmap: recompute pgoff for unmapping huge page

2013-04-29 15:54:28 -07:00

shmem.c

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

slab_common.c

mm/slab: Fix crash during slab init

2013-05-08 15:02:33 -07:00

slab.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-05-07 08:42:20 -07:00

slab.h

slab: Common definition for kmem_cache_node

2013-02-01 12:32:09 +02:00

slob.c

mm: rename page struct field helpers

2013-02-23 17:50:18 -08:00

slub.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-05-07 08:42:20 -07:00

sparse-vmemmap.c

sparse-vmemmap: specify vmemmap population range in bytes

2013-04-29 15:54:35 -07:00

sparse.c

mm, hotplug: avoid compiling memory hotremove functions when disabled

2013-04-29 15:54:37 -07:00

swap_state.c

mm: thp: add split tail pages to shrink page list in page reclaim

2013-04-29 15:54:38 -07:00

swap.c

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

swapfile.c

frontswap: get rid of swap_lock dependency

2013-04-30 17:04:00 -07:00

truncate.c

mm: drop vmtruncate

2012-12-20 18:46:29 -05:00

util.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

vmalloc.c

mm/vmalloc.c: add vfree comment

2013-05-07 18:38:27 -07:00

vmpressure.c

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

vmscan.c

mm: thp: add split tail pages to shrink page list in page reclaim

2013-04-29 15:54:38 -07:00

vmstat.c

mm/vmstat: add note on safety of drain_zonestat

2013-04-29 15:54:38 -07:00