diff options
| author | Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org> | 2002-06-27 00:26:56 +0000 |
|---|---|---|
| committer | Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org> | 2002-06-27 00:26:56 +0000 |
| commit | f531891db5addcaa93e9307284336ed02e9b2244 (patch) | |
| tree | 0fdba901a99e11c9d6186b07ae965aa3918f6376 /usr.sbin | |
| parent | d7763465fa51acddc377e336bcf842ed4bd300c0 (diff) | |
boundary check in IPv4/v6 mapped address case (affects dig(1)).
from jimpa@tla.se
Diffstat (limited to 'usr.sbin')
| -rw-r--r-- | usr.sbin/named/libresolv/gethnamaddr.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/usr.sbin/named/libresolv/gethnamaddr.c b/usr.sbin/named/libresolv/gethnamaddr.c index 69a7c03c8d5..a3d9cbe6558 100644 --- a/usr.sbin/named/libresolv/gethnamaddr.c +++ b/usr.sbin/named/libresolv/gethnamaddr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: gethnamaddr.c,v 1.5 2002/06/26 06:08:17 itojun Exp $ */ +/* $OpenBSD: gethnamaddr.c,v 1.6 2002/06/27 00:26:55 itojun Exp $ */ /* * ++Copyright++ 1985, 1988, 1993 @@ -60,7 +60,7 @@ static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93"; static char rcsid[] = "$From: gethnamaddr.c,v 8.23 1998/04/07 04:59:46 vixie Exp $"; #else -static char rcsid[] = "$OpenBSD: gethnamaddr.c,v 1.5 2002/06/26 06:08:17 itojun Exp $"; +static char rcsid[] = "$OpenBSD: gethnamaddr.c,v 1.6 2002/06/27 00:26:55 itojun Exp $"; #endif #endif /* LIBC_SCCS and not lint */ @@ -881,10 +881,10 @@ map_v4v6_address(src, dst) } static void -map_v4v6_hostent(hp, bpp, lenp) +map_v4v6_hostent(hp, bpp, ep) struct hostent *hp; char **bpp; - int *lenp; + char *ep; { char **ap; @@ -895,17 +895,15 @@ map_v4v6_hostent(hp, bpp, lenp) for (ap = hp->h_addr_list; *ap; ap++) { int i = sizeof(align) - ((u_long)*bpp % sizeof(align)); - if (*lenp < (i + IN6ADDRSZ)) { + if (ep - *bpp < (i + IN6ADDRSZ)) { /* Out of memory. Truncate address list here. XXX */ *ap = NULL; return; } *bpp += i; - *lenp -= i; map_v4v6_address(*ap, *bpp); *ap = *bpp; *bpp += IN6ADDRSZ; - *lenp -= IN6ADDRSZ; } } |