netdev - [PATCH iwl-net 4/8] i40e: fix input validation logic for action

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Message-ID: <20250813104552.61027-5-przemyslaw.kitszel@intel.com>
Date: Wed, 13 Aug 2025 12:45:14 +0200
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: intel-wired-lan@...ts.osuosl.org,
	Tony Nguyen <anthony.l.nguyen@...el.com>
Cc: netdev@...r.kernel.org,
	Greg KH <gregkh@...uxfoundation.org>,
	jeremiah.kyle@...el.com,
	leszek.pepiak@...el.com,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Lukasz Czapnik <lukasz.czapnik@...el.com>,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Subject: [PATCH iwl-net 4/8] i40e: fix input validation logic for action_meta

From: Lukasz Czapnik <lukasz.czapnik@...el.com>

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

Fixes: e284fc280473 ("i40e: Add and delete cloud filter")
Cc: stable@...r.kernel.org
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@...el.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index b6db4d78c02d..c85715f75435 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -3603,7 +3603,7 @@ 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;
-- 
2.50.0