diff options
| author |   itojun <itojun@openbsd.org> | 2001-08-20 02:27:10 +0000 |
|---|---|---|
| committer | itojun <itojun@openbsd.org> | 2001-08-20 02:27:10 +0000 |
| commit | a36c0ed8e931d761b4c93b4721c53a5fb113a96e (patch) | |
| tree | d9d3a8f262f45e734453e89a03b62b690cc3696c | |
| parent | cope with negative return value from snprintf. (diff) | |
| download | wireguard-openbsd-a36c0ed8e931d761b4c93b4721c53a5fb113a96e.tar.xz wireguard-openbsd-a36c0ed8e931d761b4c93b4721c53a5fb113a96e.zip | |
cope with sa_len < sizeof(struct sockaddr).
From: Patrik Lindergren <patrik@datacom.nu>
| -rw-r--r-- | lib/libc/net/getifaddrs.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/libc/net/getifaddrs.c b/lib/libc/net/getifaddrs.c index 5c9c337f711..ca69af8b9e4 100644 --- a/lib/libc/net/getifaddrs.c +++ b/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 */ |