From: YueHaibing <yuehaibing@huawei.com>
Date: Tue, 22 May 2018 15:07:18 +0800
Subject: cxgb4: Check for kvzalloc allocation failure
Patch-mainline: v4.18-rc1
Git-commit: d624613e422d9bda9e4f066281b1f178ed51f0b1
References: bsc#1097585 bsc#1097586 bsc#1097587 bsc#1097588 bsc#1097583 bsc#1097584

t4_prep_fw doesn't check for card_fw pointer before store the read data,
which could lead to a NULL pointer dereference if kvzalloc failed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -4113,6 +4113,10 @@ static int adap_init0(struct adapter *ad
 		 * card
 		 */
 		card_fw = kvzalloc(sizeof(*card_fw), GFP_KERNEL);
+		if (!card_fw) {
+			ret = -ENOMEM;
+			goto bye;
+		}
 
 		/* Get FW from from /lib/firmware/ */
 		ret = request_firmware(&fw, fw_info->fw_mod_name,