[PATCH 3/4] ocfs2: Fix possible use-after-free with AIO
From: Jan Kara <jack@suse.cz>
Date: 2013-01-29 23:28:00
Also in:
linux-fsdevel, linux-xfs, ocfs2-devel
Subsystem:
filesystems (vfs and infrastructure), oracle cluster filesystem 2 (ocfs2), the rest · Maintainers:
Alexander Viro, Christian Brauner, Mark Fasheh, Joel Becker, Joseph Qi, Linus Torvalds
Running AIO is pinning inode in memory using file reference. Once AIO is completed using aio_complete(), file reference is put and inode can be freed from memory. So we have to be sure that calling aio_complete() is the last thing we do with the inode. CC: Joel Becker <jlbec@evilplan.org> CC: ocfs2-devel@oss.oracle.com CC: stable@vger.kernel.org Acked-by: Jeff Moyer <redacted> Signed-off-by: Jan Kara <jack@suse.cz> --- fs/ocfs2/aops.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 6577432..340bd02 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c@@ -593,9 +593,9 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, level = ocfs2_iocb_rw_locked_level(iocb); ocfs2_rw_unlock(inode, level); + inode_dio_done(inode); if (is_async) aio_complete(iocb, ret, 0); - inode_dio_done(inode); } /*
--
1.7.1