linux-kernel - [PATCH] net: qrtr: fix error return code of qrtr

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Message-Id: <20210308091355.8726-1-baijiaju1990@gmail.com>
Date:   Mon,  8 Mar 2021 01:13:55 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     davem@...emloft.net, kuba@...nel.org, loic.poulain@...aro.org,
        bjorn.andersson@...aro.org, mani@...nel.org,
        cjhuang@...eaurora.org, necip@...gle.com, edumazet@...gle.com,
        miaoqinglang@...wei.com, dan.carpenter@...cle.com,
        wenhu.wang@...o.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] net: qrtr: fix error return code of qrtr_sendmsg()

When sock_alloc_send_skb() returns NULL to skb, no error return code of
qrtr_sendmsg() is assigned.
To fix this bug, rc is assigned with -ENOMEM in this case.

Fixes: 194ccc88297a ("net: qrtr: Support decoding incoming v2 packets")
Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 net/qrtr/qrtr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index b34358282f37..ac2a4a7711da 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -958,8 +958,10 @@ static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	plen = (len + 3) & ~3;
 	skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE,
 				  msg->msg_flags & MSG_DONTWAIT, &rc);
-	if (!skb)
+	if (!skb) {
+		rc = -ENOMEM;
 		goto out_node;
+	}
 
 	skb_reserve(skb, QRTR_HDR_MAX_SIZE);
 
-- 
2.17.1