From: YueHaibing <yuehaibing@huawei.com>
Date: Tue, 22 May 2018 07:07:18 +0000 (+0800)
Subject: cxgb4: Check for kvzalloc allocation failure
X-Git-Tag: for-linus-20180616~56^2~151
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d624613e422d9bda9e4f066281b1f178ed51f0b1;p=linux-block.git

cxgb4: Check for kvzalloc allocation failure

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>
---

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 513e1d356384..8405187f8e3f 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -4140,6 +4140,10 @@ static int adap_init0(struct adapter *adap)
 		 * 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,