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Avoid segmentation fault if "dns_zone_lookup()" is called with an empty 

string as name. Problem noted by Simon Burge.
This commit is contained in:
tron 2000-11-07 13:21:36 +00:00
parent 975795b27b
commit 68fa36f81f
1 changed files with 4 additions and 1 deletions
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5
usr.sbin/dhcp/common/dns.c
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@ -42,7 +42,7 @@
#ifndef lint #ifndef lint
static char copyright[] = static char copyright[] =
"$Id: dns.c,v 1.2 2000/10/29 22:55:57 tron Exp $ Copyright (c) 2000 The Internet Software Consortium. All rights reserved.\n"; "$Id: dns.c,v 1.3 2000/11/07 13:21:36 tron Exp $ Copyright (c) 2000 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */ #endif /* not lint */
#include "dhcpd.h" #include "dhcpd.h"
@ -220,6 +220,9 @@ isc_result_t dns_zone_lookup (struct dns_zone **zone, const char *name)
return ISC_R_NOTFOUND; return ISC_R_NOTFOUND;
len = strlen (name); len = strlen (name);
if (len == 0)
return ISC_R_NOTFOUND;
if (name [len - 1] != '.') { if (name [len - 1] != '.') {
tname = dmalloc (len + 2, MDL); tname = dmalloc (len + 2, MDL);
if (!tname) if (!tname)