ext4: fix buffer leak in ext4_xattr_get_block() on error path

vaverin · tytso · commit ecaaf408478b · 2018-11-07T11:01:33.000-05:00
Fixes: dec214d ("ext4: xattr inode deduplication") Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org # 4.13
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
@@ -2272,8 +2272,10 @@ static struct buffer_head *ext4_xattr_get_block(struct inode *inode)
 	if (!bh)
 		return ERR_PTR(-EIO);
 	error = ext4_xattr_check_block(inode, bh);
-	if (error)
+	if (error) {
+		brelse(bh);
 		return ERR_PTR(error);
+	}
 	return bh;
 }
 
