Re: [PATCH] ext4: only update tune mount options when requested

[Theodore Ts'o]

On Mon, 10 Aug 2026 23:12:00 +0800, guzebing wrote:
> EXT4_IOC_SET_TUNE_SB_PARAM uses set_flags to indicate which superblock
> fields the caller wants to update. ext4_sb_setparams() checks set_flags
> before updating the other supported fields, but always copied mount_opts
> into the on-disk s_mount_opts field.
> 
> As a result, callers that do not set EXT4_TUNE_FL_MOUNT_OPTS can still
> clear or alter the on-disk default mount options through their unused
> mount_opts buffer. This can affect subsequent mounts by changing the
> filesystem's stored default mount options.
> 
> [...]

Applied, thanks!

[1/1] ext4: only update tune mount options when requested
      commit: 981eec6c300bd4e84ffac8f3c28b762d00f13e9c

Best regards,
-- 
Theodore Ts'o <tytso@xxxxxxx>