From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Aditya Pakki <pakki001@umn.edu>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 01/21] qlcnic: Avoid potential NULL pointer dereference
Date: Mon, 22 Apr 2019 15:49:21 -0400 [thread overview]
Message-ID: <20190422194941.13433-1-sashal@kernel.org> (raw)
From: Aditya Pakki <pakki001@umn.edu>
[ 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 <pakki001@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
---
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 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;
--
2.19.1
next reply other threads:[~2019-04-22 19:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-22 19:49 Sasha Levin [this message]
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 02/21] netfilter: bridge: set skb transport_header before entering NF_INET_PRE_ROUTING Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 08/21] net: ks8851: Dequeue RX packets explicitly Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 09/21] net: ks8851: Reassert reset pin if chip ID check fails Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 10/21] net: ks8851: Delay requesting IRQ until opened Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 11/21] net: ks8851: Set initial carrier state to down Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 12/21] net: xilinx: fix possible object reference leak Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 13/21] net: ibm: " Sasha Levin
2019-04-22 19:49 ` [PATCH AUTOSEL 4.4 14/21] net: ethernet: ti: " Sasha Levin
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