Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 28 Aug 2019 15:47:49 +0900
From:   Austin Kim <austindh.kim@gmail.com>
To:     darrick.wong@oracle.com
Cc:     linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org,
        austindh.kim@gmail.com
Subject: [PATCH] xfs: Use WARN_ON rather than BUG() for bailout
 mount-operation
Message-ID: <20190828064749.GA165571@LGEARND20B15>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

If the CONFIG_BUG is enabled, BUG() is executed and then system is crashed.
However, the bailout for mount is no longer proceeding.

For this reason, using WARN_ON rather than BUG() could prevent this situation.
---
 fs/xfs/xfs_mount.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 322da69..10fe000 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -213,8 +213,7 @@ xfs_initialize_perag(
 			goto out_hash_destroy;
 
 		spin_lock(&mp->m_perag_lock);
-		if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
-			BUG();
+		if (WARN_ON(radix_tree_insert(&mp->m_perag_tree, index, pag))){
 			spin_unlock(&mp->m_perag_lock);
 			radix_tree_preload_end();
 			error = -EEXIST;
-- 
2.6.2