From: Richard Alpe <richard.alpe@ericsson.com>
Date: Thu, 3 Mar 2016 13:20:43 +0000 (+0100)
Subject: tipc: make sure required IPv6 addresses are scoped
X-Git-Tag: v4.14-rc1~3609^2~122
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=34f65dbb6c7572b826d836d62b99de32ecf2af48;p=platform%2Fkernel%2Flinux-rpi.git

tipc: make sure required IPv6 addresses are scoped

Make sure the user has provided a scope for multicast and link local
addresses used locally by a UDP bearer.

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 6fe8740..fb2f7ec6 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -310,9 +310,14 @@ err:
 
 #if IS_ENABLED(CONFIG_IPV6)
 	} else if ((sa_local.ss_family & sa_remote.ss_family) == AF_INET6) {
+		int atype;
 		struct sockaddr_in6 *ip6;
 
 		ip6 = (struct sockaddr_in6 *)&sa_local;
+		atype = ipv6_addr_type(&ip6->sin6_addr);
+		if (__ipv6_addr_needs_scope_id(atype) && !ip6->sin6_scope_id)
+			return -EINVAL;
+
 		local->proto = htons(ETH_P_IPV6);
 		local->udp_port = ip6->sin6_port;
 		memcpy(&local->ipv6, &ip6->sin6_addr, sizeof(struct in6_addr));