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Re: curl_easy_perform crash in Curl_do after Curl_reconnect_request has been called

From: Ho-chi Chen <>
Date: Tue, 25 Sep 2012 13:29:45 -0700 (PDT)

I have the similar issue for 7.21.1. At first, I debugged it and found the crash was caused by using the variable conn which was already freed. So I did the research and found this thread. I downloaded 7.27.0 and checked the codes again but I think there still is a protential problem. In

CURLcode Curl_reconnect_request(structconnectdata **connp)
result = Curl_done(&conn, result, FALSE);
for some cases, Curl_done() could free the memory which is assigned to *connp and only set conn to NULL but not *connp which becomes a bad address and it may cause the crash later.
Should we add the following line after returning from Curl_done()?
    *connp = NULL;
Ho-chi Chen

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Received on 2012-09-25