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

Reported-by: NDave Jones <davej@redhat.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org

fs/ext4/xattr.c

@@ -1352,6 +1352,7 @@ 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;