cope with sa_len < sizeof(struct sockaddr).

From: Patrik Lindergren <patrik@datacom.nu>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/lib/libc/net/getifaddrs.c b/src/lib/libc/net/getifaddrs.c
index 5c9c337f71..ca69af8b9e 100644
--- a/src/lib/libc/net/getifaddrs.c
+++ b/src/lib/libc/net/getifaddrs.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: getifaddrs.c,v 1.5 2001/07/04 19:43:16 deraadt Exp $  */
+/*      $OpenBSD: getifaddrs.c,v 1.6 2001/08/20 02:27:10 itojun Exp $   */
 
 /*
  * Copyright (c) 1995, 1999
@@ -213,7 +213,10 @@ getifaddrs(struct ifaddrs **pif)
                 dcnt += SA_RLEN(sa);
                 ncnt += sizeof(ifr->ifr_name) + 1;
                 
-                ifr = (struct ifreq *)(((char *)sa) + SA_LEN(sa));
+                if (SA_LEN(sa) < sizeof(*sa))
+                        ifr = (struct ifreq *)(((char *)sa) + sizeof(*sa));
+                else
+                        ifr = (struct ifreq *)(((char *)sa) + SA_LEN(sa));
         }
 #endif  /* NET_RT_IFLIST */