Handle failure of hash_questions()

src/forward.c

@@ -1417,6 +1417,7 @@ static int  tcp_check_for_unsigned_zone(time_t now, struct dns_header *header, s
       
       /* We rely on the question section coming back unchanged, ensure it is with the hash. */
       if ((newhash = hash_questions(header, (unsigned int)m, name)))
+	{
 	  memcpy(hash, newhash, HASH_SIZE);
       
 	  *length = htons(m);
@@ -1457,6 +1458,7 @@ static int  tcp_check_for_unsigned_zone(time_t now, struct dns_header *header, s
 		    }
 		}
 	    }
+	}
       
       free(packet);
 
@@ -1731,6 +1733,8 @@ unsigned char *tcp_request(int confd, time_t now,
 		  unsigned char *newhash, hash[HASH_SIZE];
 		  if ((newhash = hash_questions(header, (unsigned int)size, daemon->keyname)))
 		    memcpy(hash, newhash, HASH_SIZE);
+		  else
+		    memset(hash, 0, HASH_SIZE);
 #else
 		  unsigned int crc = questions_crc(header, (unsigned int)size, daemon->namebuff);
 #endif