i40e: fix idx validation in i40e_validate_queue_map

commit aa68d3c upstream.

Ensure idx is within range of active/initialized TCs when iterating over
vf->ch[idx] in i40e_validate_queue_map().

Fixes: c27eac4 ("i40e: Enable ADq and create queue channel/s on VF")
Cc: [email protected]
Signed-off-by: Lukasz Czapnik <[email protected]>
Reviewed-by: Aleksandr Loktionov <[email protected]>
Signed-off-by: Przemek Kitszel <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Tested-by: Kamakshi Nellore <[email protected]> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: lczapnik

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

@@ -2376,8 +2376,10 @@ static int i40e_validate_queue_map(struct i40e_vf *vf, u16 vsi_id,
 	u16 vsi_queue_id, queue_id;
 
 	for_each_set_bit(vsi_queue_id, &queuemap, I40E_MAX_VSI_QP) {
-		if (vf->adq_enabled) {
-			vsi_id = vf->ch[vsi_queue_id / I40E_MAX_VF_VSI].vsi_id;
+		u16 idx = vsi_queue_id / I40E_MAX_VF_VSI;
+
+		if (vf->adq_enabled && idx < vf->num_tc) {
+			vsi_id = vf->ch[idx].vsi_id;
 			queue_id = (vsi_queue_id % I40E_DEFAULT_QUEUES_PER_VF);
 		} else {
 			queue_id = vsi_queue_id;