ice: fix input validation for virtchnl BW

Add missing validation of tc and queue id values sent by a VF in
ice_vc_cfg_q_bw().
Additionally fixed logged value in the warning message,
where max_tx_rate was incorrectly referenced instead of min_tx_rate.
Also correct error handling in this function by properly exiting
when invalid configuration is detected.

Fixes: 0153077 ("ice: Support VF queue rate limit and quanta size configuration")
Reviewed-by: Jedrzej Jagielski <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Lukasz Czapnik <[email protected]>
Co-developed-by: Martyna Szapar-Mudlaw <[email protected]>
Signed-off-by: Martyna Szapar-Mudlaw <[email protected]>
Tested-by: Rafal Romanowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: lczapnik

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

@@ -1862,15 +1862,33 @@ static int ice_vc_cfg_q_bw(struct ice_vf *vf, u8 *msg)
 
 	for (i = 0; i < qbw->num_queues; i++) {
 		if (qbw->cfg[i].shaper.peak != 0 && vf->max_tx_rate != 0 &&
-		    qbw->cfg[i].shaper.peak > vf->max_tx_rate)
+		    qbw->cfg[i].shaper.peak > vf->max_tx_rate) {
 			dev_warn(ice_pf_to_dev(vf->pf), "The maximum queue %d rate limit configuration may not take effect because the maximum TX rate for VF-%d is %d\n",
 				 qbw->cfg[i].queue_id, vf->vf_id,
 				 vf->max_tx_rate);
+			v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+			goto err;
+		}
 		if (qbw->cfg[i].shaper.committed != 0 && vf->min_tx_rate != 0 &&
-		    qbw->cfg[i].shaper.committed < vf->min_tx_rate)
+		    qbw->cfg[i].shaper.committed < vf->min_tx_rate) {
 			dev_warn(ice_pf_to_dev(vf->pf), "The minimum queue %d rate limit configuration may not take effect because the minimum TX rate for VF-%d is %d\n",
 				 qbw->cfg[i].queue_id, vf->vf_id,
-				 vf->max_tx_rate);
+				 vf->min_tx_rate);
+			v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+			goto err;
+		}
+		if (qbw->cfg[i].queue_id > vf->num_vf_qs) {
+			dev_warn(ice_pf_to_dev(vf->pf), "VF-%d trying to configure invalid queue_id\n",
+				 vf->vf_id);
+			v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+			goto err;
+		}
+		if (qbw->cfg[i].tc >= ICE_MAX_TRAFFIC_CLASS) {
+			dev_warn(ice_pf_to_dev(vf->pf), "VF-%d trying to configure a traffic class higher than allowed\n",
+				 vf->vf_id);
+			v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+			goto err;
+		}
 	}
 
 	for (i = 0; i < qbw->num_queues; i++) {