protect against 'use after free' or race condition

diff --git a/lib/hostip.c b/lib/hostip.c
index cee5bc2d8017cd363cf4819b9deafb1930d4def1..03dcce86cc11d37d2f0a334023f19483aa34296f 100644 (file)
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -732,6 +732,7 @@ void Curl_freeaddrinfo(Curl_addrinfo *ai)
       free(ai->ai_addr);
     if(ai->ai_canonname)
       free(ai->ai_canonname);
+    memset(ai, 0, sizeof(Curl_addrinfo));
     free(ai);
     ai = next;
   }