[master] zone parsing broken with embedded null

3534.	[bug]		Extra text after an embedded NULL was ignored when
			parsing zone files. [RT #32699]

CHANGES

+3534.	[bug]		Extra text after an embedded NULL was ignored when
+			parsing zone files. [RT #32699]
+
 3533.	[contrib]	query-loc-0.4.0: memory leaks. [RT #32960]
 
 3532.	[contrib]	zkt: fixed buffer overrun, resource leaks. [RT #32960]

bin/tests/system/checkzone/tests.sh

@@ -28,6 +28,16 @@ do
 	status=`expr $status + $ret`
 done
 
+for db in zones/bad*.db
+do
+	echo "I:checking $db ($n)"
+	ret=0
+	$CHECKZONE -i local example $db > test.out.$n 2>&1 && ret=1
+	n=`expr $n + 1`
+	if [ $ret != 0 ]; then echo "I:failed"; fi
+	status=`expr $status + $ret`
+done
+
 echo "I:checking with journal file ($n)"
 ret=0
 $CHECKZONE -D -o test.orig.db test zones/test1.db > /dev/null 2>&1 || ret=1

lib/dns/master.c

@@ -584,6 +584,7 @@ loadctx_create(dns_masterformat_t format, isc_mem_t *mctx,
 			goto cleanup_inc;
 		lctx->keep_lex = ISC_FALSE;
 		memset(specials, 0, sizeof(specials));
+		specials[0] = 1;
 		specials['('] = 1;
 		specials[')'] = 1;
 		specials['"'] = 1;