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| author | Andrey Ryabinin <a.ryabinin@samsung.com> | 2014-06-06 17:09:30 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-06 17:53:41 +0200 |
| commit | 624483f3ea82598ab0f62f1bdb9177f531ab1892 (patch) | |
| tree | db14accead23e539ddbb9ff5eb9994179c69e6b8 /mm/truncate.c | |
| parent | Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
| download | linux-624483f3ea82598ab0f62f1bdb9177f531ab1892.tar.xz linux-624483f3ea82598ab0f62f1bdb9177f531ab1892.zip | |
mm: rmap: fix use-after-free in __put_anon_vma
While working address sanitizer for kernel I've discovered
use-after-free bug in __put_anon_vma.
For the last anon_vma, anon_vma->root freed before child anon_vma.
Later in anon_vma_free(anon_vma) we are referencing to already freed
anon_vma->root to check rwsem.
This fixes it by freeing the child anon_vma before freeing
anon_vma->root.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org> # v3.0+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/truncate.c')
0 files changed, 0 insertions, 0 deletions