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[curl:bugs] #1496 pointer realloc crash while doing curl_easy_perform

From: Daniel Stenberg <bagder_at_users.sf.net>
Date: Wed, 08 Apr 2015 19:01:46 +0000

- **status**: open --> pending-needsinfo
- **assigned_to**: Daniel Stenberg
- **Comment**:

Sorry but there's no code attach and there are literally thousands of people and applications using libcurl daily that don't get this sort of crash. We need more specific details to pinpoint the source of this!

---
** [bugs:#1496] pointer realloc crash while doing curl_easy_perform**
**Status:** pending-needsinfo
**Labels:** getaddrinfo 
**Created:** Wed Apr 08, 2015 03:25 PM UTC by Puneet Singhal
**Last Updated:** Wed Apr 08, 2015 03:25 PM UTC
**Owner:** Daniel Stenberg
I use libcurl to download some files on the system but seems to be crashing intermittently.
Attaching system info and calling code in the ticket
libCurl version - 7.39.0
Crashed Thread:        24
Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Application Specific Information:
abort() called
*** error for object 0x1400000017: pointer being realloc'd was not allocated
Crash Stack:
Thread 24 Crashed:
0   libsystem_kernel.dylib        	0x00007fff9c809286 __pthread_kill + 10
1   libsystem_c.dylib             	0x00007fff97952b53 abort + 129
2   libsystem_malloc.dylib        	0x00007fff98e273cd realloc + 385
3   libsystem_c.dylib             	0x00007fff97958037 reallocf + 21
4   libsystem_info.dylib          	0x00007fff959d47d2 _mdns_hostent_append_alias + 129
5   libsystem_info.dylib          	0x00007fff959d42ae _mdns_query_callback + 248
6   libsystem_dnssd.dylib         	0x00007fff93bb0c9b handle_query_response + 243
7   libsystem_dnssd.dylib         	0x00007fff93baf1b8 DNSServiceProcessResult + 680
8   libsystem_info.dylib          	0x00007fff959d2c1e _mdns_search + 1592
9   libsystem_info.dylib          	0x00007fff959d9dd2 mdns_addrinfo + 525
10  libsystem_info.dylib          	0x00007fff959d9b85 search_addrinfo + 179
11  libsystem_info.dylib          	0x00007fff959d98da si_addrinfo + 1395
12  libsystem_info.dylib          	0x00007fff959d92c3 getaddrinfo + 179
13  se.haxx.curl.libcurl          	0x0000000110a465d9 Curl_getaddrinfo_ex + 40
14  se.haxx.curl.libcurl          	0x0000000110a42407 Curl_getaddrinfo + 267
15  se.haxx.curl.libcurl          	0x0000000110a19276 Curl_resolv + 243
16  se.haxx.curl.libcurl          	0x0000000110a1936e Curl_resolv_timeout + 119
17  se.haxx.curl.libcurl          	0x0000000110a2bcc3 create_conn + 11389
18  se.haxx.curl.libcurl          	0x0000000110a2bea1 Curl_connect + 37
19  se.haxx.curl.libcurl          	0x0000000110a3df3f multi_runsingle + 712
20  se.haxx.curl.libcurl          	0x0000000110a3f2c0 curl_multi_perform + 163
21  se.haxx.curl.libcurl          	0x0000000110a377b4 curl_easy_perform + 394
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Received on 2015-04-08

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