[PATCH 5.11 071/306] net: qrtr: fix error return code of qrtr_sendmsg()

[gregkh]

From: Greg Kroah-Hartman <gre...@linuxfoundation.org>

From: Jia-Ju Bai <baijiaju1...@gmail.com>

commit 179d0ba0c454057a65929c46af0d6ad986754781 upstream.

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 <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/qrtr/qrtr.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -958,8 +958,10 @@ static int qrtr_sendmsg(struct socket *s
        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);