linux-kernel - [PATCH 5.12 342/384] ext4: fix ext4_error_err save negative errno into superblock

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Message-Id: <20210510102026.051105528@linuxfoundation.org>
Date:   Mon, 10 May 2021 12:22:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, stable@...nel.org,
        Liu Zhi Qiang <liuzhiqiang26@...wei.com>,
        Ye Bin <yebin10@...wei.com>,
        Andreas Dilger <adilger@...ger.ca>,
        Theodore Tso <tytso@....edu>
Subject: [PATCH 5.12 342/384] ext4: fix ext4_error_err save negative errno into superblock

From: Ye Bin <yebin10@...wei.com>

commit 6810fad956df9e5467e8e8a5ac66fda0836c71fa upstream.

Fix As write_mmp_block() so that it returns -EIO instead of 1, so that
the correct error gets saved into the superblock.

Cc: stable@...nel.org
Fixes: 54d3adbc29f0 ("ext4: save all error info in save_error_info() and drop ext4_set_errno()")
Reported-by: Liu Zhi Qiang <liuzhiqiang26@...wei.com>
Signed-off-by: Ye Bin <yebin10@...wei.com>
Reviewed-by: Andreas Dilger <adilger@...ger.ca>
Link: https://lore.kernel.org/r/20210406025331.148343-1-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ext4/mmp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -56,7 +56,7 @@ static int write_mmp_block(struct super_
 	wait_on_buffer(bh);
 	sb_end_write(sb);
 	if (unlikely(!buffer_uptodate(bh)))
-		return 1;
+		return -EIO;
 
 	return 0;
 }