1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 6842dd2edd5b..8905712cfbb8 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -53,6 +53,8 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
 {
         const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
         const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
+        __be32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
+        __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
         int sk_ipv6only = ipv6_only_sock(sk);
         int sk2_ipv6only = inet_v6_ipv6only(sk2);
         int addr_type = ipv6_addr_type(sk_rcv_saddr6);
@@ -60,7 +62,9 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
 
         /* if both are mapped, treat as IPv4 */
         if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED)
-                return ipv4_rcv_saddr_equal(sk, sk2);
+                return (!sk2_ipv6only &&
+                        (!sk_rcv_saddr || !sk2_rcv_saddr ||
+                          sk_rcv_saddr == sk2_rcv_saddr));
 
         if (addr_type2 == IPV6_ADDR_ANY &&
             !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))