enforce dns_adb_createaddrinfofind() invariant

ADB `dns_adb_createaddrinfofind()` expects `maxaddrs` paramaters is
always strictly positive. Add an assertion to enforce it.

diff --git a/lib/dns/adb.c b/lib/dns/adb.c
index 8c9b0cbeb8f123ae02629b35eee2e95260ffab1b..8e3a381f55f457967d7e5ff702714e0775d5c651 100644 (file)
--- a/lib/dns/adb.c
+++ b/lib/dns/adb.c
@@ -1743,6 +1743,7 @@ dns_adb_createaddrinfosfind(dns_adb_t *adb, isc_netaddrlist_t *addrs,
        REQUIRE(DNS_ADB_VALID(adb));
        REQUIRE(addrs != NULL);
        REQUIRE(findp != NULL && *findp == NULL);
+       REQUIRE(maxaddrs > 0);
 
        rcu_read_lock();