linux-kernel - [PATCH] ext4: bad mount opts in no journal mode

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Message-Id: <20190411214917.1899-1-dbanerje@akamai.com>
Date:   Thu, 11 Apr 2019 17:49:17 -0400
From:   Debabrata Banerjee <dbanerje@...mai.com>
To:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, Dmitry Monakhov <dmonakhov@...nvz.org>,
        linux-kernel@...r.kernel.org
Cc:     dbanerje@...mai.com
Subject: [PATCH] ext4: bad mount opts in no journal mode

Fixes:
commit 1e381f60dad9 ("ext4: do not allow journal_opts for fs w/o journal")

Instead of removing EXT4_MOUNT_JOURNAL_CHECKSUM from s_def_mount_opt as
I assume was intended, all other options were blown away leading to
_ext4_show_options() output being incorrect. I don't see why this or
other journal related flags should be removed from s_def_mount_opt
regardless, it is only used for comparison to display opts, and we
already made sure they couldn't be set.

Signed-off-by: Debabrata Banerjee <dbanerje@...mai.com>
---
 fs/ext4/super.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 6ed4eb81e674..63eef29666e0 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4238,7 +4238,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 				 "data=, fs mounted w/o journal");
 			goto failed_mount_wq;
 		}
-		sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM;
 		clear_opt(sb, JOURNAL_CHECKSUM);
 		clear_opt(sb, DATA_FLAGS);
 		sbi->s_journal = NULL;
-- 
2.21.0