Sudip Mukherjee 8285027fc4 mm/page_owner: avoid null pointer dereference ...

We have dereferenced page_ext before checking it.  Lets check it first
and then used it.

Fixes: f86e427197 ("mm: check the return value of lookup_page_ext for all call sites")
Link: http://lkml.kernel.org/r/1465249059-7883-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-06-24 17:23:52 -07:00

..

kasan

mm: mempool: kasan: don't poot mempool objects in quarantine

2016-06-24 17:23:52 -07:00

backing-dev.c

mm: throttle on IO only when there are too many dirty and writeback pages

2016-05-20 17:58:30 -07:00

balloon_compaction.c

…

bootmem.c

…

cleancache.c

…

cma_debug.c

…

cma.c

mm/cma: silence warnings due to max() usage

2016-05-27 14:49:37 -07:00

cma.h

…

compaction.c

mm, compaction: abort free scanner if split fails

2016-06-24 17:23:52 -07:00

debug_page_ref.c

…

debug.c

…

dmapool.c

…

early_ioremap.c

…

fadvise.c

mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED

2016-06-09 14:23:11 -07:00

failslab.c

…

filemap.c

Revert "mm: make faultaround produce old ptes"

2016-06-24 17:23:52 -07:00

frame_vector.c

…

frontswap.c

…

gup.c

Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-04-14 19:31:34 -07:00

highmem.c

mm/highmem: make nr_free_highpages() handles all highmem zones by itself

2016-05-19 19:12:14 -07:00

huge_memory.c

Merge tag 'libnvdimm-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2016-05-23 11:18:01 -07:00

hugetlb_cgroup.c

mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size

2016-05-20 17:58:30 -07:00

hugetlb.c

mm/hugetlb: clear compound_mapcount when freeing gigantic pages

2016-06-24 17:23:52 -07:00

hwpoison-inject.c

…

init-mm.c

…

internal.h

mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask

2016-06-24 17:23:52 -07:00

interval_tree.c

…

Kconfig

mm: disable DEFERRED_STRUCT_PAGE_INIT on !NO_BOOTMEM

2016-05-27 14:49:37 -07:00

Kconfig.debug

…

kmemcheck.c

…

kmemleak-test.c

…

kmemleak.c

mm: prevent KASAN false positives in kmemleak

2016-06-24 17:23:52 -07:00

ksm.c

ksm: fix conflict between mmput and scan_get_next_rmap_item

2016-05-12 15:52:50 -07:00

list_lru.c

…

maccess.c

x86: remove more uaccess_32.h complexity

2016-05-22 17:21:27 -07:00

madvise.c

mm: make mmap_sem for write waits killable for mm syscalls

2016-05-23 17:04:14 -07:00

Makefile

z3fold: the 3-fold allocator for compressed pages

2016-05-20 17:58:30 -07:00

memblock.c

mm/memblock.c: remove unnecessary always-true comparison

2016-05-20 17:58:30 -07:00

memcontrol.c

memcg: css_alloc should return an ERR_PTR value on error

2016-06-24 17:23:52 -07:00

memory_hotplug.c

mm: fix section mismatch warning

2016-05-27 15:23:32 -07:00

memory-failure.c

mm/memory-failure.c: replace "MCE" with "Memory failure"

2016-05-20 17:58:30 -07:00

memory.c

Revert "mm: disable fault around on emulated access bit architecture"

2016-06-24 17:23:52 -07:00

mempolicy.c

mm, page_alloc: avoid looking up the first zone in a zonelist twice

2016-05-19 19:12:14 -07:00

mempool.c

mm: mempool: kasan: don't poot mempool objects in quarantine

2016-06-24 17:23:52 -07:00

memtest.c

…

migrate.c

mm: Export migrate_page_move_mapping and migrate_page_copy

2016-06-23 00:29:45 +02:00

mincore.c

mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage

2016-04-04 10:41:08 -07:00

mlock.c

mm: make mmap_sem for write waits killable for mm syscalls

2016-05-23 17:04:14 -07:00

mm_init.c

…

mmap.c

mm: remove more IS_ERR_VALUE abuses

2016-05-27 15:57:31 -07:00

mmu_context.c

mm/mmu_context, sched/core: Fix mmu_context.h assumption

2016-04-28 11:44:19 +02:00

mmu_notifier.c

…

mmzone.c

mm, page_alloc: inline the fast path of the zonelist iterator

2016-05-19 19:12:14 -07:00

mprotect.c

mm: make mmap_sem for write waits killable for mm syscalls

2016-05-23 17:04:14 -07:00

mremap.c

mm: make mmap_sem for write waits killable for mm syscalls

2016-05-23 17:04:14 -07:00

msync.c

…

nobootmem.c

…

nommu.c

mm: remove more IS_ERR_VALUE abuses

2016-05-27 15:57:31 -07:00

oom_kill.c

oom_reaper: avoid pointless atomic_inc_not_zero usage.

2016-06-24 17:23:52 -07:00

page_alloc.c

mm, page_alloc: recalculate the preferred zoneref if the context can ignore memory policies

2016-06-03 16:02:57 -07:00

page_counter.c

…

page_ext.c

mm: use early_pfn_to_nid in page_ext_init

2016-05-27 14:49:37 -07:00

page_idle.c

…

page_io.c

Merge branch 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-05-17 15:05:23 -07:00

page_isolation.c

mm/memory_hotplug: add comment to some functions related to memory hotplug

2016-05-19 19:12:14 -07:00

page_owner.c

mm/page_owner: avoid null pointer dereference

2016-06-24 17:23:52 -07:00

page_poison.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

page-writeback.c

writeback: use higher precision calculation in domain_dirty_limits()

2016-05-30 08:54:40 -06:00

pagewalk.c

…

percpu-km.c

…

percpu-vm.c

…

percpu.c

percpu: fix synchronization between synchronous map extension and chunk destruction

2016-05-25 11:48:25 -04:00

pgtable-generic.c

…

process_vm_access.c

…

quicklist.c

…

readahead.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

rmap.c

mm: thp: avoid false positive VM_BUG_ON_PAGE in page_move_anon_rmap()

2016-05-27 14:49:37 -07:00

shmem.c

tmpfs: don't undo fallocate past its last page

2016-06-24 17:23:52 -07:00

slab_common.c

mm: kasan: initial memory quarantine implementation

2016-05-20 17:58:30 -07:00

slab.c

mm, kasan: don't call kasan_krealloc() from ksize().

2016-05-20 17:58:30 -07:00

slab.h

mm: kasan: initial memory quarantine implementation

2016-05-20 17:58:30 -07:00

slob.c

…

slub.c

mm, kasan: don't call kasan_krealloc() from ksize().

2016-05-20 17:58:30 -07:00

sparse-vmemmap.c

…

sparse.c

…

swap_cgroup.c

…

swap_state.c

mm: thp: broken page count after commit aa88b68c3b

2016-06-09 14:23:11 -07:00

swap.c

mm/swap.c: flush lru pvecs on compound page arrival

2016-06-24 17:23:52 -07:00

swapfile.c

mm: thp: calculate the mapcount correctly for THP pages during WP faults

2016-05-12 15:52:50 -07:00

truncate.c

dax: New fault locking

2016-05-19 15:20:54 -06:00

userfaultfd.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

util.c

mm: make vm_mmap killable

2016-05-23 17:04:14 -07:00

vmacache.c

…

vmalloc.c

mm: fix overflow in vm_map_ram()

2016-06-03 15:06:22 -07:00

vmpressure.c

…

vmscan.c

mm, oom: rework oom detection

2016-05-20 17:58:30 -07:00

vmstat.c

mm: check the return value of lookup_page_ext for all call sites

2016-06-03 15:06:22 -07:00

workingset.c

…

z3fold.c

mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup

2016-06-03 16:02:55 -07:00

zbud.c

…

zpool.c

…

zsmalloc.c

update "mm/zsmalloc: don't fail if can't create debugfs info"

2016-05-26 15:35:44 -07:00

zswap.c

mm/zswap: use workqueue to destroy pool

2016-05-20 17:58:30 -07:00