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Commit 74a9e727 authored by Aditya Pakki's avatar Aditya Pakki Committed by Greg Kroah-Hartman
Browse files

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: default avatarAditya Pakki <pakki001@umn.edu>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin (Microsoft) <sashal@kernel.org>
parent 3b2c5114

drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c

+2 −0
Original line number Diff line number Diff line
@@ -1047,6 +1047,8 @@ 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;