place a upper bound on rdcount

2014-06-04 13:16:42 +10:00
parent 38cf49d0ef
commit d2fbb50b98
1 changed files with 1 additions and 1 deletions
--- a/lib/dns/master.c
+++ b/lib/dns/master.c
@@ -2375,7 +2375,7 @@ load_raw(dns_loadctx_t *lctx) {
 		rdatalist.covers = isc_buffer_getuint16(&target);
 		rdatalist.ttl =  isc_buffer_getuint32(&target);
 		rdcount = isc_buffer_getuint32(&target);
-		if (rdcount == 0) {
+		if (rdcount == 0 || rdcount > 0xffff) {
 			result = ISC_R_RANGE;
 			goto cleanup;
 		}