Bugs item #3023840, was opened at 2010-07-01 14:41
Message generated for change (Tracker Item Submitted) made by ygreks
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Category: libcurl
Group: crash
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: ygrek (ygreks)
Assigned to: Daniel Stenberg (bagder)
Summary: getinfo(CURLINFO_LASTSOCKET) after curl_multi_remove_handle

Initial Comment:
libcurl segfaults when trying to get CURLINFO_LASTSOCKET after the easy handle was removed from multi handle. Swapping the calls to curl_multi_remove_handle and curl_easy_getinfo makes the crash go away.
Not that it makes much sense to do but anyway :)

Debian testing
$ dpkg -l | grep libcurl
ii libcurl3 7.21.0-1 Multi-protocol file transfer library (OpenSSL)
ii libcurl3-dbg 7.21.0-1 libcurl compiled with debug symbols
ii libcurl3-gnutls 7.21.0-1 Multi-protocol file transfer library (GnuTLS)
ii libcurl4-openssl-dev 7.21.0-1 Development files and documentation for libcurl (OpenSS
$ uname -r
2.6.32-trunk-amd64

The url in code is http://127.0.0.1/ which responds 403. The code is minimally modified examples/multi-single.c

$ gcc -lcurl multi-single.c -o multi
$ ./multi
GNU libc version: 2.10.2 stable
libcurl/7.21.0 OpenSSL/0.9.8m zlib/1.2.3.4 libidn/1.15 libssh2/1.2.5
Segmentation fault
$ gdb ./multi
[...]
(gdb) r
[...]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fa387ed1710 (LWP 1997)]
0x00007fa387aac81c in Curl_getconnectinfo () from /usr/lib/libcurl.so.4
(gdb) bt
#0 0x00007fa387aac81c in Curl_getconnectinfo () from /usr/lib/libcurl.so.4
#1 0x00007fa387aa5fc6 in Curl_getinfo () from /usr/lib/libcurl.so.4
#2 0x00007fa387aa8eeb in curl_easy_getinfo () from /usr/lib/libcurl.so.4
#3 0x0000000000400da0 in main ()

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Received on 2010-07-01