diff options
| author | Sasha Neftin | 2021-06-14 15:19:39 +0300 |
|---|---|---|
| committer | Tony Nguyen | 2021-07-20 16:11:36 -0700 |
| commit | 373e2829e7c2e1e606503cdb5c97749f512a4be9 (patch) | |
| tree | dc8c66ebe0ba63d7f65eb3662b348f505fbe81f1 /drivers/net/ethernet/intel/igc | |
| parent | e0bc64d31c98609900ed84b476bfc9d07d7f370f (diff) | |
igc: Check if num of q_vectors is smaller than max before array access
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@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igc')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 11385c380947..f7cf97916390 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -5125,6 +5125,7 @@ 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; @@ -5133,7 +5134,13 @@ 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++; |