Re: [PATCH v2] common/rc: fix mount options quoting in _mount

["Darrick J. Wong" <djwong@kernel.org>]

On Wed, Jul 01, 2026 at 02:14:07PM +0800, lan@suse.com wrote:
> From: An Long <lan@suse.com>
> 
> In commit 078f320 ("treewide: convert all $MOUNT_PROG to _mount"),
> direct calls to $MOUNT_PROG were converted to call the helper function
> _mount.
> However, the _mount helper was implemented using `$*` instead of `"$@"`.
> This unquoted argument expansion triggers word splitting on any arguments
> containing spaces (such as the overlay mount options containing spaces in
> tests `overlay/083` and `overlay/086`), causing the mount to fail with
> "mount: bad usage".
> Fix this regression by using `"$@"` in the _mount helper, which correctly
> preserves argument boundaries exactly as they were provided by the caller.
> 
> Signed-off-by: An Long <lan@suse.com>
> ---
> v2: Revert the error log to "$*"

Very good!
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

>  common/rc | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/common/rc b/common/rc
> index 79189e7e..b9a07324 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -296,7 +296,7 @@ _has_dmesg_since_option()
>  
>  _mount()
>  {
> -	$MOUNT_PROG $*
> +	$MOUNT_PROG "$@"
>  	ret=$?
>  	if [ "$ret" -ne 0 ]; then
>  		echo "\"$MOUNT_PROG $*\" failed at $(date)" >> "$seqres.mountfail?"
> -- 
> 2.51.0
> 
>