ice: Check VF VSI Pointer Value in ice_vc_add_fdir_fltr()

jira LE-4694
Rebuild_History Non-Buildable kernel-6.12.0-55.43.1.el10_0
commit-author Xuanqiang Luo <luoxuanqiang@kylinos.cn>
commit 425c5f2

As mentioned in the commit baeb705 ("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.

Fixes: 6ebbe97 ("ice: Add a per-VF limit on number of FDIR filters")
	Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
	Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
	Reviewed-by: Simon Horman <horms@kernel.org>
	Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20250425222636.3188441-3-anthony.l.nguyen@intel.com
	Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(cherry picked from commit 425c5f2)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c

@@ -2097,6 +2097,11 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg)
 	pf = vf->pf;
 	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) ||