corrupted requests with multiple questions could

cause assertion failure (fix from Bob)

CHANGES

@@ -1,3 +1,6 @@
+ 141.	[bug]		Corrupt requests with multiple questions could
+			cause an assertion failure.
+
  140.   [cleanup]       <isc/time.h> does not need <time.h> or <isc/result.h>.
 
  139.   [cleanup]       <isc/net.h> now includes <isc/types.h> instead of

lib/dns/message.c

@@ -941,6 +941,7 @@ getquestions(isc_buffer_t *source, dns_message_t *msg, dns_decompress_t *dctx)
 		rdataset->attributes |= DNS_RDATASETATTR_QUESTION;
 
 		ISC_LIST_APPEND(name->list, rdataset, link);
+		rdataset = NULL;
 	}
 
 	return (ISC_R_SUCCESS);