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Date: Thu, 14 Mar 2019 15:26:20 -0500 From: Aditya Pakki <pakki001@....edu> To: pakki001@....edu Cc: kjlu@....edu, Shahed Shaikh <shshaikh@...vell.com>, Manish Chopra <manishc@...vell.com>, GR-Linux-NIC-Dev@...vell.com, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] 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@....edu> --- drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c index 3b0adda7cc9c..826571029b21 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c @@ -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 (!unlikely(skb)) + break; qlcnic_create_loopback_buff(skb->data, adapter->mac_addr); skb_put(skb, QLCNIC_ILB_PKT_SIZE); adapter->ahw->diag_cnt = 0; -- 2.17.1
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