Re: [PATCH] usb: typec: Fix error pointer dereference

[Heikki Krogerus]

Wed, Feb 18, 2026 at 03:46:21PM -0600, Ethan Tidmore wrote:
> The variable tps->partner is checked for an error pointer and then if it
> is, it sends an error message but does not return and then immediately
> dereferenced a few lines below:
> 
> tps->partner = typec_register_partner(tps->port, &desc);
> if (IS_ERR(tps->partner))
> 	dev_warn(tps->dev, "%s: failed to register partnet\n", __func__);
> 
> if (desc.identity) {
> 	typec_partner_set_identity(tps->partner);
> 	cd321x->cur_partner_identity = st.partner_identity;
> }
> 
> Add early return and fix spelling mistake in error message.
> 
> Detected by Smatch:
> drivers/usb/typec/tipd/core.c:827 cd321x_update_work() error:
> 'tps->partner' dereferencing possible ERR_PTR()
> 
> Fixes: 82432bbfb9e83 ("usb: typec: tipd: Handle mode transitions for CD321x")
> Signed-off-by: Ethan Tidmore <ethantidmore06@xxxxxxxxx>

Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

> ---
>  drivers/usb/typec/tipd/core.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index e2b26af2b84a..43faec794b95 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -820,8 +820,10 @@ static void cd321x_update_work(struct work_struct *work)
>  			desc.identity = &st.partner_identity;
>  
>  		tps->partner = typec_register_partner(tps->port, &desc);
> -		if (IS_ERR(tps->partner))
> -			dev_warn(tps->dev, "%s: failed to register partnet\n", __func__);
> +		if (IS_ERR(tps->partner)) {
> +			dev_warn(tps->dev, "%s: failed to register partner\n", __func__);
> +			return;
> +		}
>  
>  		if (desc.identity) {
>  			typec_partner_set_identity(tps->partner);
> -- 
> 2.53.0

-- 
heikki