linux-ext4 - [PATCH v2] ext4: fix error code in ext4_commit

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Date:   Fri,  2 Apr 2021 18:16:31 +0800
From:   Fengnan Chang <changfengnan@...o.com>
To:     tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org
Cc:     Fengnan Chang <changfengnan@...o.com>
Subject: [PATCH v2] ext4: fix error code in ext4_commit_super

We should set the error code when ext4_commit_super check argument failed.
Found in code review.
Fixes: c4be0c1dc4cdc ("filesystem freeze: add error handling of write_super_lockfs/unlockfs").

Signed-off-by: Fengnan Chang <changfengnan@...o.com>
---
 fs/ext4/super.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 03373471131c..1130599c87dc 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5500,8 +5500,10 @@ static int ext4_commit_super(struct super_block *sb, int sync)
 	struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
 	int error = 0;

-	if (!sbh || block_device_ejected(sb))
-		return error;
+	if (!sbh)
+		return -EINVAL;
+	if (block_device_ejected(sb))
+		return -ENODEV;

 	/*
 	 * If the file system is mounted read-only, don't update the
--
2.29.0