Insist that ai_addrlen is the expected size

2024-03-07 00:53:45 +00:00
1 changed files with 2 additions and 0 deletions
--- a/lib/dns/resconf.c
+++ b/lib/dns/resconf.c
@@ -243,8 +243,10 @@ add_server(isc_mem_t *mctx, const char *address_str,
 		if (memcmp(v4, zeroaddress, 4) == 0) {
 			memmove(v4, loopaddress, 4);
 		}
+		INSIST(res->ai_addrlen == sizeof(address->type.sin));
 		memmove(&address->type.sin, res->ai_addr, res->ai_addrlen);
 	} else if (res->ai_family == AF_INET6) {
+		INSIST(res->ai_addrlen == sizeof(address->type.sin6));
 		memmove(&address->type.sin6, res->ai_addr, res->ai_addrlen);
 	} else {
 		isc_mem_put(mctx, address, sizeof(*address));