From 6ea92ab8b19afd78656924dca4fb1e5b1f3264d8 Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Fri, 20 Mar 2020 17:43:07 +0800
Subject: [PATCH] btrfs: don't use WARN_ON when ret is -ENOTENT in
 __btrfs_free_extent()

hulk inclusion
category: bugfix
bugzilla: 13690
CVE: CVE-2019-19039

-------------------------------------------------

Avoid print register messages when ret is -ENOTENT.

Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 fs/btrfs/extent-tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 47ca1ebda056..4bf93184362e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6793,7 +6793,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
 			}
 			extent_slot = path->slots[0];
 		}
-	} else if (WARN_ON(ret == -ENOENT)) {
+	} else if (ret == -ENOENT) {
 		btrfs_print_leaf(path->nodes[0]);
 		btrfs_err(info,
 			"unable to find ref byte nr %llu parent %llu root %llu  owner %llu offset %llu",
-- 
GitLab