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qlcnic: Avoid potential NULL pointer dereference 

netdev_alloc_skb can fail and return a NULL pointer which is
dereferenced without a check. The patch avoids such a scenario.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Aditya Pakki 2019-03-14 15:31:40 -05:00 committed by David S. Miller
parent 58f2ce6f61
commit 5bf7295fe3
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
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@ -1048,6 +1048,8 @@ int qlcnic_do_lb_test(struct qlcnic_adapter *adapter, u8 mode)
for (i = 0; i < QLCNIC_NUM_ILB_PKT; i++) {
skb = netdev_alloc_skb(adapter->netdev, QLCNIC_ILB_PKT_SIZE);
if (!skb)
break;
qlcnic_create_loopback_buff(skb->data, adapter->mac_addr);
skb_put(skb, QLCNIC_ILB_PKT_SIZE);
adapter->ahw->diag_cnt = 0;