From: Denis V. Lunev <den@openvz.org>
Date: Wed, 4 Jun 2008 11:49:08 +0000 (+0400)
Subject: [IPV6]: Do not change protocol for UDPv6 sockets with pending sent data.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9596cc826e2e52bfc318ca37a6c52fe3d72990a3;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[IPV6]: Do not change protocol for UDPv6 sockets with pending sent data.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 1afe210d6286..26b83e512a09 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -164,9 +164,14 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			if (sk->sk_type == SOCK_RAW)
 				break;
 
-			if (sk->sk_protocol != IPPROTO_UDP &&
-			    sk->sk_protocol != IPPROTO_UDPLITE &&
-			    sk->sk_protocol != IPPROTO_TCP)
+			if (sk->sk_protocol == IPPROTO_UDP ||
+			    sk->sk_protocol == IPPROTO_UDPLITE) {
+				struct udp_sock *up = udp_sk(sk);
+				if (up->pending == AF_INET6) {
+					retv = -EBUSY;
+					break;
+				}
+			} else if (sk->sk_protocol != IPPROTO_TCP)
 				break;
 
 			if (sk->sk_state != TCP_ESTABLISHED) {