netdev - Re: [PATCH iwl-net v2] ice: Check VF VSI Pointer Value in ice_vc_add_fdir

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Message-ID: <4a960ad6-6118-4db8-9511-a1e3bb5b66f3@intel.com>
Date: Thu, 27 Mar 2025 11:22:50 +0100
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Xuanqiang Luo <xuanqiang.luo@...ux.dev>, <anthony.l.nguyen@...el.com>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <netdev@...r.kernel.org>,
	<intel-wired-lan@...ts.osuosl.org>, Xuanqiang Luo <luoxuanqiang@...inos.cn>
Subject: Re: [PATCH iwl-net v2] ice: Check VF VSI Pointer Value in
 ice_vc_add_fdir_fltr()

On 3/25/25 03:01, Xuanqiang Luo wrote:
> From: Xuanqiang Luo <luoxuanqiang@...inos.cn>
> 
> As mentioned in the commit baeb705fd6a7 ("ice: always check VF VSI
> pointer values"), we need to perform a null pointer check on the return
> value of ice_get_vf_vsi() before using it.
> 
> v2: Add "iwl-net" to the subject and modify the name format.
> 
> Fixes: 6ebbe97a4881 ("ice: Add a per-VF limit on number of FDIR filters")
> Signed-off-by: Xuanqiang Luo <luoxuanqiang@...inos.cn>
> ---

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>

(technically the changelog (v2:...) should be placed here, with 
additional "---" line afterwards; no need to resubmit just for that)

>   drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c
> index 14e3f0f89c78..53bad68e3f38 100644
> --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c
> +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c
> @@ -2092,6 +2092,12 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg)
>   	dev = ice_pf_to_dev(pf);
>   	vf_vsi = ice_get_vf_vsi(vf);
>   
> +	if (!vf_vsi) {
> +		dev_err(dev, "Can not get FDIR vf_vsi for VF %u\n", vf->vf_id);
> +		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
> +		goto err_exit;
> +	}
> +
>   #define ICE_VF_MAX_FDIR_FILTERS	128
>   	if (!ice_fdir_num_avail_fltr(&pf->hw, vf_vsi) ||
>   	    vf->fdir.fdir_fltr_cnt_total >= ICE_VF_MAX_FDIR_FILTERS) {