au1000_eth: possible NULL dereference of aup->mii_bus->irq in au1000_probe()

aup->mii_bus->irq allocation may fail, prevent a dereference of NULL.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 407fd45f56a1..fdf5937233fc 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -1157,6 +1157,9 @@ static struct net_device * au1000_probe(int port_num)
         aup->mii_bus->name = "au1000_eth_mii";
         snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
         aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+        if (aup->mii_bus->irq == NULL)
+                goto err_out;
+
         for(i = 0; i < PHY_MAX_ADDR; ++i)
                 aup->mii_bus->irq[i] = PHY_POLL;