From 65e6cca34beb912d33bac82dffe8848ad1cc3cf0 Mon Sep 17 00:00:00 2001 From: Aditya Pakki Date: Thu, 14 Mar 2019 15:31:40 -0500 Subject: qlcnic: Avoid potential NULL pointer dereference [ Upstream commit 5bf7295fe34a5251b1d241b9736af4697b590670 ] 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 Signed-off-by: David S. Miller Signed-off-by: Sasha Levin (Microsoft) --- drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c index 0a2318cad34d..63ebc491057b 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c @@ -1038,6 +1038,8 @@ 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; -- cgit v1.2.3