ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()

commit dcb9917b upstream.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

fs/ext4/xattr.c

@@ -1271,6 +1271,7 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
 					new_extra_isize = s_min_extra_isize;
 					kfree(is); is = NULL;
 					kfree(bs); bs = NULL;
+					brelse(bh);
 					goto retry;
 				}
 				error = -1;