upstream: Return immediately from get_sock_port

if sock <0 so we don't call getsockname on a negative FD.  From Coverity
CID 291840, ok djm@

OpenBSD-Commit-ID: de1c1130646230c2eda559831fc6bfd1b61d9618

diff --git a/canohost.c b/canohost.c
index 457e9097e1593253f389056cfcca4d2fbafa7a60..28f086e5a694565c196fd198a67e16309e4d4356 100644 (file)
--- a/canohost.c
+++ b/canohost.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: canohost.c,v 1.76 2023/03/03 05:00:34 djm Exp $ */
+/* $OpenBSD: canohost.c,v 1.77 2023/03/31 04:42:29 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -163,6 +163,8 @@ get_sock_port(int sock, int local)
        char strport[NI_MAXSERV];
        int r;
 
+       if (sock < 0)
+               return -1;
        /* Get IP address of client. */
        fromlen = sizeof(from);
        memset(&from, 0, sizeof(from));