1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index a3f559162521..b81eb7cb815e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -737,6 +737,7 @@ static void tcp_v6_init_req(struct request_sock *req,
                             const struct sock *sk_listener,
                             struct sk_buff *skb)
 {
+        bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);
         struct inet_request_sock *ireq = inet_rsk(req);
         const struct ipv6_pinfo *np = inet6_sk(sk_listener);
 
@@ -744,7 +745,7 @@ static void tcp_v6_init_req(struct request_sock *req,
         ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
 
         /* So that link locals have meaning */
-        if (!sk_listener->sk_bound_dev_if &&
+        if ((!sk_listener->sk_bound_dev_if || l3_slave) &&
             ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
                 ireq->ir_iif = tcp_v6_iif(skb);