From 5bf7295fe34a5251b1d241b9736af4697b590670 Mon Sep 17 00:00:00 2001
From: Aditya Pakki <pakki001@umn.edu>
Date: Thu, 14 Mar 2019 15:31:40 -0500
Subject: [PATCH] qlcnic: Avoid potential NULL pointer dereference
Git-commit: 5bf7295fe34a5251b1d241b9736af4697b590670
Patch-mainline: v5.1-rc3
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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..a4cd6f2cfb86 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 (!skb)
+ break;
qlcnic_create_loopback_buff(skb->data, adapter->mac_addr);
skb_put(skb, QLCNIC_ILB_PKT_SIZE);
adapter->ahw->diag_cnt = 0;
--
2.16.4