[PATCH net 2/4] bnge: require NQ vectors beyond aux reservation

[Bhargava Marreddy]

If exactly aux_msix vectors are granted, probe continues with zero NQ
vectors. This leads to zero-sized allocations and out-of-bounds array
accesses during ring setup.

Require at least 'min' vectors beyond the aux reservation to ensure the
driver always has an NQ vector to work with.

Fixes: 18a975389fcc ("bng_en: Add irq allocation support")
Signed-off-by: Bhargava Marreddy <bhargava.marreddy@xxxxxxxxxxxx>
Reviewed-by: Dharmender Garg <dharmender.garg@xxxxxxxxxxxx>
Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@xxxxxxxxxxxx>
Reviewed-by: Ramakrishna Koduri <ramakrishna.koduri@xxxxxxxxxxxx>
---
 drivers/net/ethernet/broadcom/bnge/bnge_resc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
index 4711dd4945ff..7c26943c5cb3 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_resc.c
@@ -382,7 +382,7 @@ int bnge_alloc_irqs(struct bnge_dev *bd)
 	irqs_demand = pci_alloc_irq_vectors(bd->pdev, min, irqs_demand,
 					    PCI_IRQ_MSIX);
 	aux_msix = bnge_aux_get_msix(bd);
-	if (irqs_demand < 0 || irqs_demand < aux_msix) {
+	if (irqs_demand < 0 || irqs_demand < aux_msix + min) {
 		rc = -ENODEV;
 		goto err_free_irqs;
 	}
-- 
2.47.3