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| author | Michel Lespinasse <walken@google.com> | 2012-10-08 16:30:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:28 +0900 |
| commit | ca42b26ab285edc5ee3f9faa48379d258db53c35 (patch) | |
| tree | 4a9d68d4d730474dde75b1ffff106d7e3442aef1 /arch/Kconfig | |
| parent | 227e4047488d3ee0173a914275a7fd207ad51e5b (diff) | |
| download | lwn-ca42b26ab285edc5ee3f9faa48379d258db53c35.tar.gz lwn-ca42b26ab285edc5ee3f9faa48379d258db53c35.zip | |
mm: fix potential anon_vma locking issue in mprotect()
Fix an anon_vma locking issue in the following situation:
- vma has no anon_vma
- next has an anon_vma
- vma is being shrunk / next is being expanded, due to an mprotect call
We need to take next's anon_vma lock to avoid races with rmap users (such
as page migration) while next is being expanded.
Signed-off-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/Kconfig')
0 files changed, 0 insertions, 0 deletions