diff -Naru c-ares-1.15.0/ares_parse_a_reply.c c-ares-1.15.0_patch/ares_parse_a_reply.c
--- c-ares-1.15.0/ares_parse_a_reply.c	2017-07-03 17:04:19.000000000 +0800
+++ c-ares-1.15.0_patch/ares_parse_a_reply.c	2021-07-26 16:20:35.986193500 +0800
@@ -221,7 +221,8 @@
               if (addrttls[i].ttl > cname_ttl)
                 addrttls[i].ttl = cname_ttl;
             }
-          *naddrttls = n;
+          /* Truncated to at most *naddrttls entries */
+          *naddrttls = (n > *naddrttls) ? *naddrttls : n;
         }
       if (aliases)
         aliases[naliases] = NULL;
diff -Naru c-ares-1.15.0/ares_parse_aaaa_reply.c c-ares-1.15.0_patch/ares_parse_aaaa_reply.c
--- c-ares-1.15.0/ares_parse_aaaa_reply.c	2017-07-03 17:04:19.000000000 +0800
+++ c-ares-1.15.0_patch/ares_parse_aaaa_reply.c	2021-07-26 16:21:10.314711500 +0800
@@ -221,7 +221,8 @@
               if (addrttls[i].ttl > cname_ttl)
                 addrttls[i].ttl = cname_ttl;
             }
-          *naddrttls = n;
+          /* Truncated to at most *naddrttls entries */
+          *naddrttls = (n > *naddrttls) ? *naddrttls : n;
         }
       if (aliases)
         aliases[naliases] = NULL;