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| author | Hugh Dickins <hughd@google.com> | 2014-06-23 13:22:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-09 11:14:03 -0700 |
| commit | f76d0efeb668c5409dcce9dc3afafaee599bd757 (patch) | |
| tree | ccccf6eca87e2c7f2fc7c6467cdb491feb524adb /mm/maccess.c | |
| parent | 9b576da0f77415c2735a5bbdb581309fe22d5999 (diff) | |
| download | lwn-f76d0efeb668c5409dcce9dc3afafaee599bd757.tar.gz lwn-f76d0efeb668c5409dcce9dc3afafaee599bd757.zip | |
mm: fix crashes from mbind() merging vmas
commit d05f0cdcbe6388723f1900c549b4850360545201 upstream.
In v2.6.34 commit 9d8cebd4bcd7 ("mm: fix mbind vma merge problem")
introduced vma merging to mbind(), but it should have also changed the
convention of passing start vma from queue_pages_range() (formerly
check_range()) to new_vma_page(): vma merging may have already freed
that structure, resulting in BUG at mm/mempolicy.c:1738 and probably
worse crashes.
Fixes: 9d8cebd4bcd7 ("mm: fix mbind vma merge problem")
Reported-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Tested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/maccess.c')
0 files changed, 0 insertions, 0 deletions