Avoid NULL pointer dereference in routing table an_match().

OK mvs@

diff --git a/sys/net/rtable.c b/sys/net/rtable.c
index 38282eb..48108ce 100644 (file)
--- a/sys/net/rtable.c
+++ b/sys/net/rtable.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: rtable.c,v 1.85 2023/11/12 17:51:40 bluhm Exp $ */
+/*     $OpenBSD: rtable.c,v 1.86 2024/03/26 10:01:57 bluhm Exp $ */
 
 /*
  * Copyright (c) 2014-2016 Martin Pieuchot
@@ -875,7 +875,7 @@ an_match(struct art_node *an, const struct sockaddr *dst, int plen)
                return (0);
 
        rt = SRPL_FIRST(&sr, &an->an_rtlist);
-       match = (memcmp(rt->rt_dest, dst, dst->sa_len) == 0);
+       match = (rt != NULL && memcmp(rt->rt_dest, dst, dst->sa_len) == 0);
        SRPL_LEAVE(&sr);
 
        return (match);