https://github.com/torvalds/linux
Revision 94e18007688a13e5da1a2f1b7f52f15cc56c9f5e authored by Jeff Layton on 04 March 2013, 20:18:25 UTC, committed by Steve French on 07 March 2013, 01:03:57 UTC
We had a recent fix to fix the release of pagecache pages when
cifs_writev_requeue writes fail. Unfortunately, it releases the page
before trying to unlock it. At that point, the page might be gone by the
time the unlock comes in.

Unlock the page first before checking the value of "rc", and only then
end writeback and release the pages. The page lock isn't required for
any of those operations so this should be safe.

Reported-by: Anton Altaparmakov <aia21@cam.ac.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
1 parent 2518964
History
Tip revision: 94e18007688a13e5da1a2f1b7f52f15cc56c9f5e authored by Jeff Layton on 04 March 2013, 20:18:25 UTC
cifs: don't try to unlock pagecache page after releasing it
Tip revision: 94e1800
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