The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x f2326fd14a224e4cccbab89e14c52279ff79b7ec # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025082138-barracuda-engorge-cf38@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From f2326fd14a224e4cccbab89e14c52279ff79b7ec Mon Sep 17 00:00:00 2001 From: Baokun Li libaokun1@huawei.com Date: Thu, 3 Jul 2025 15:39:03 +0800 Subject: [PATCH] ext4: preserve SB_I_VERSION on remount
IMA testing revealed that after an ext4 remount, file accesses triggered full measurements even without modifications, instead of skipping as expected when i_version is unchanged.
Debugging showed `SB_I_VERSION` was cleared in reconfigure_super() during remount due to commit 1ff20307393e ("ext4: unconditionally enable the i_version counter") removing the fix from commit 960e0ab63b2e ("ext4: fix i_version handling on remount").
To rectify this, `SB_I_VERSION` is always set for `fc->sb_flags` in ext4_init_fs_context(), instead of `sb->s_flags` in __ext4_fill_super(), ensuring it persists across all mounts.
Cc: stable@kernel.org Fixes: 1ff20307393e ("ext4: unconditionally enable the i_version counter") Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Jan Kara jack@suse.cz Link: https://patch.msgid.link/20250703073903.6952-2-libaokun@huaweicloud.com Signed-off-by: Theodore Ts'o tytso@mit.edu
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9203518786e4..ed1b36bd51c8 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1998,6 +1998,9 @@ int ext4_init_fs_context(struct fs_context *fc) fc->fs_private = ctx; fc->ops = &ext4_context_ops;
+ /* i_version is always enabled now */ + fc->sb_flags |= SB_I_VERSION; + return 0; }
@@ -5316,9 +5319,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
- /* i_version is always enabled now */ - sb->s_flags |= SB_I_VERSION; - /* HSM events are allowed by default. */ sb->s_iflags |= SB_I_ALLOW_HSM;