1 files changed, 16 insertions, 0 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index b6e59f0a9475..d06cb8752dcd 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1397,6 +1397,22 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
         return svsk;
 }
 
+bool svc_alien_sock(struct net *net, int fd)
+{
+        int err;
+        struct socket *sock = sockfd_lookup(fd, &err);
+        bool ret = false;
+
+        if (!sock)
+                goto out;
+        if (sock_net(sock->sk) != net)
+                ret = true;
+        sockfd_put(sock);
+out:
+        return ret;
+}
+EXPORT_SYMBOL_GPL(svc_alien_sock);
+
 /**
  * svc_addsock - add a listener socket to an RPC service
  * @serv: pointer to RPC service to which to add a new listener