linux-ext4 - [PATCH] ext4: reject the 'commit' option on ext2 filesystems

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Message-Id: <20220510183232.172615-1-ebiggers@kernel.org>
Date:   Tue, 10 May 2022 11:32:32 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-ext4@...r.kernel.org
Cc:     fstests@...r.kernel.org, Lukas Czerner <lczerner@...hat.com>
Subject: [PATCH] ext4: reject the 'commit' option on ext2 filesystems

From: Eric Biggers <ebiggers@...gle.com>

The 'commit' option is only applicable for ext3 and ext4 filesystems,
and has never been accepted by the ext2 filesystem driver, so the ext4
driver shouldn't allow it on ext2 filesystems.

This fixes a failure in xfstest ext4/053.

Fixes: 8dc0aa8cf0f7 ("ext4: check incompatible mount options while mounting ext2/3")
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/ext4/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1847b46af8083..69d67724df24f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1913,6 +1913,7 @@ static const struct mount_opts {
 	 MOPT_EXT4_ONLY | MOPT_CLEAR},
 	{Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET},
 	{Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR},
+	{Opt_commit, 0, MOPT_NO_EXT2},
 	{Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,
 	 MOPT_EXT4_ONLY | MOPT_CLEAR},
 	{Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,

base-commit: 23e3d7f7061f8682c751c46512718f47580ad8f0
-- 
2.36.1