GFS2: write_end error path fails to unlock transaction lock

I did an audit of gfs2's transaction glock for bugzilla bug
658619 and ran across this:

In function gfs2_write_end, in the unlikely event that
gfs2_meta_inode_buffer returns an error, the code may forget
to unlock the transaction lock because the "failed" label
appears after the call to function gfs2_trans_end.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index c71995b111bf6f4347ffb313692c4ee66ff6f74e..0f5c4f9d5d62beee06937a8d0c98bd015f7dc5ee 100644 (file)
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -884,8 +884,8 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
        }
 
        brelse(dibh);
-       gfs2_trans_end(sdp);
 failed:
+       gfs2_trans_end(sdp);
        if (al) {
                gfs2_inplace_release(ip);
                gfs2_quota_unlock(ip);