From: Sasha Neftin <sasha.neftin@xxxxxxxxx>
[ Upstream commit 373e2829e7c2e1e606503cdb5c97749f512a4be9 ]
Ensure that the adapter->q_vector[MAX_Q_VECTORS] array isn't accessed
beyond its size. It was fixed by using a local variable num_q_vectors
as a limit for loop index, and ensure that num_q_vectors is not bigger
than MAX_Q_VECTORS.
Suggested-by: Aleksandr Loktionov <aleksandr.loktionov@xxxxxxxxx>
Signed-off-by: Sasha Neftin <sasha.neftin@xxxxxxxxx>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@xxxxxxxxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/intel/igc/igc_main.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 084cf4a4114a..9ba05d9aa8e0 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -2693,6 +2693,7 @@ static irqreturn_t igc_msix_ring(int irq, void *data)
*/
static int igc_request_msix(struct igc_adapter *adapter)
{
+ unsigned int num_q_vectors = adapter->num_q_vectors;
int i = 0, err = 0, vector = 0, free_vector = 0;
struct net_device *netdev = adapter->netdev;
@@ -2701,7 +2702,13 @@ static int igc_request_msix(struct igc_adapter *adapter)
if (err)
goto err_out;
- for (i = 0; i < adapter->num_q_vectors; i++) {
+ if (num_q_vectors > MAX_Q_VECTORS) {
+ num_q_vectors = MAX_Q_VECTORS;
+ dev_warn(&adapter->pdev->dev,
+ "The number of queue vectors (%d) is higher than max allowed (%d)\n",
+ adapter->num_q_vectors, MAX_Q_VECTORS);
+ }
+ for (i = 0; i < num_q_vectors; i++) {
struct igc_q_vector *q_vector = adapter->q_vector[i];
vector++;
--
2.30.2
