ext4: fix buffer leak in ext4_xattr_move_to_block() on error path

Fixes: 3f2571c1 ("ext4: factor out xattr moving")
Fixes: 6dd4ee7c ("ext4: Expand extra_inodes space per ...")
Reviewed-by: NJan Kara <jack@suse.cz>
Signed-off-by: NVasily Averin <vvs@virtuozzo.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.23

fs/ext4/xattr.c

@@ -2617,6 +2617,8 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode,
 	kfree(buffer);
 	if (is)
 		brelse(is->iloc.bh);
+	if (bs)
+		brelse(bs->bh);
 	kfree(is);
 	kfree(bs);