i40e: fix input validation logic for action_meta

commit 9739d58 upstream.

Fix condition to check 'greater or equal' to prevent OOB dereference.

Fixes: e284fc2 ("i40e: Add and delete cloud filter")
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: Rafal Romanowski <[email protected]>
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

@@ -3367,7 +3367,7 @@ static int i40e_validate_cloud_filter(struct i40e_vf *vf,
 
 	/* action_meta is TC number here to which the filter is applied */
 	if (!tc_filter->action_meta ||
-	    tc_filter->action_meta > vf->num_tc) {
+	    tc_filter->action_meta >= vf->num_tc) {
 		dev_info(&pf->pdev->dev, "VF %d: Invalid TC number %u\n",
 			 vf->vf_id, tc_filter->action_meta);
 		goto err;