1 files changed, 6 insertions, 1 deletions

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 1b745d412cf6..dd2b9478ddd1 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -466,8 +466,13 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
                 goto out;
 
         if (addr->sin_family != AF_INET) {
+                /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
+                 * only if s_addr is INADDR_ANY.
+                 */
                 err = -EAFNOSUPPORT;
-                goto out;
+                if (addr->sin_family != AF_UNSPEC ||
+                    addr->sin_addr.s_addr != htonl(INADDR_ANY))
+                        goto out;
         }
 
         chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);