Can you run gdb on your target?

If so, that could help you determine exactly where it stops.

If not, I guess adding some logging to libcurl at some places could be useful to narrow down exactly which exact code that crashes.

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** [bugs:#1463] libCurl crashes the program by throwing SSL read: error:00000000:lib(0):func(0):reason(0), errno 110".**
**Status:** open
**Labels:** errno 110 SSL/TLS openssl 
**Created:** Tue Dec 09, 2014 12:18 PM UTC by kritpal singh
**Last Updated:** Wed Dec 10, 2014 07:52 AM UTC
**Owner:** Daniel Stenberg
**libcurl version** - 7.38.0
**platform** - openwrt arm7 
**protocol** - https 
**program code snippet**
if (curl) {
   curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
   curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30);
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, read_data);
   //url_easy_setopt(curl, CURLOPT_WRITEDATA, client);
   curl_easy_setopt(curl, CURLOPT_URL, "https://***.com:1027/page");  
   curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
   curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 0);
   printf("sending perform request\n");
   try{
   res = curl_easy_perform(curl); // Perform the request, res will get the return code 
   printf("%s",curl_easy_strerror(res));
   }catch(int e){
       printf("catch the error\n");
       fflush(stdout);
   }
   printf("perform done");
   if (res != CURLE_OK) { /* Check for errors */
       fprintf(stderr, "curl_easy_perform() failed: %s\n",
               curl_easy_strerror(res));
       printf(" Uploading failed \n");
       fflush(stdout);
       result = 0;
   }
And i tried with this as well 
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 2);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, true);
    curl_easy_setopt(curl, CURLOPT_CAINFO, "/server.cer");
**Output **
sending perform request
> POST /send_log HTTP/1.1
Host: cloud.securifi.com:1027
Accept: */*
Content-Length: 1028775
Expect: 100-continue
Content-Type: multipart/form-data; boundary=----------------------------d7460292fcc7
< HTTP/1.1 100 Continue
* SSL read: error:00000000:lib(0):func(0):reason(0), errno 110
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