net: lio_core: fix two NULL pointer dereferences

In case octeon_alloc_soft_command fails, the fix reports the
error and returns to avoid NULL pointer dereferences.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c
index e21bf37..1c50c10 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_core.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c
@@ -1211,6 +1211,11 @@ int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
 
        sc = (struct octeon_soft_command *)
                octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE, 16, 0);
+       if (!sc) {
+               netif_info(lio, rx_err, lio->netdev,
+                          "Failed to allocate soft command\n");
+               return -ENOMEM;
+       }
 
        ncmd = (union octnet_cmd *)sc->virtdptr;
 
@@ -1684,6 +1689,11 @@ int liquidio_set_fec(struct lio *lio, int on_off)
 
        sc = octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
                                       sizeof(struct oct_nic_seapi_resp), 0);
+       if (!sc) {
+               dev_err(&oct->pci_dev->dev,
+                       "Failed to allocate soft command\n");
+               return -ENOMEM;
+       }
 
        ncmd = sc->virtdptr;
        resp = sc->virtrptr;