Commit 4b05d09c authored Jan 23, 2013 by Jan Kara Committed by Ben Myers Jan 28, 2013

xfs: Fix possible use-after-free with AIO



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: xfs@oss.sgi.com
CC: Ben Myers <bpm@sgi.com>
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

parent 9f87832a

fs/xfs/xfs_aops.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -86,11 +86,11 @@ xfs_destroy_ioend(
		}

		if (ioend->io_iocb) {
		inode_dio_done(ioend->io_inode);
		if (ioend->io_isasync) {
		aio_complete(ioend->io_iocb, ioend->io_error ?
		ioend->io_error : ioend->io_result, 0);
		}
		inode_dio_done(ioend->io_inode);
		}

		mempool_free(ioend, xfs_ioend_pool);