ice: Check for null pointer dereference when setting rings

Without this check rebuild vsi can lead to kernel panic.

Signed-off-by: Michal Swiatkowski <michal.swiatkowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 76c5324..d061e9f 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4303,8 +4303,13 @@ int ice_vsi_setup_tx_rings(struct ice_vsi *vsi)
        }
 
        ice_for_each_txq(vsi, i) {
-               vsi->tx_rings[i]->netdev = vsi->netdev;
-               err = ice_setup_tx_ring(vsi->tx_rings[i]);
+               struct ice_ring *ring = vsi->tx_rings[i];
+
+               if (!ring)
+                       return -EINVAL;
+
+               ring->netdev = vsi->netdev;
+               err = ice_setup_tx_ring(ring);
                if (err)
                        break;
        }
@@ -4329,8 +4334,13 @@ int ice_vsi_setup_rx_rings(struct ice_vsi *vsi)
        }
 
        ice_for_each_rxq(vsi, i) {
-               vsi->rx_rings[i]->netdev = vsi->netdev;
-               err = ice_setup_rx_ring(vsi->rx_rings[i]);
+               struct ice_ring *ring = vsi->rx_rings[i];
+
+               if (!ring)
+                       return -EINVAL;
+
+               ring->netdev = vsi->netdev;
+               err = ice_setup_rx_ring(ring);
                if (err)
                        break;
        }