Hi Antoine,
On Sat, Jun 29, 2013 at 08:43:37PM -0400, Antoine Beaupré wrote:
> (gdb) bt
> #0 0x00007f6b57da8475 in *__GI_raise (sig=<optimized out>)
> at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
> #1 0x00007f6b57dab6f0 in *__GI_abort () at abort.c:92
> #2 0x00007f6b57de352b in __libc_message (do_abort=<optimized out>,
> fmt=<optimized out>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
> #3 0x00007f6b57decd76 in malloc_printerr (action=3,
> str=0x7f6b57ec5170 "munmap_chunk(): invalid pointer", ptr=<optimized out>)
> at malloc.c:6283
> #4 0x00007f6b55c8ca9e in ?? () from /lib/x86_64-linux-gnu/libgcrypt.so.11
> #5 0x00007f6b5613b094 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.26
> #6 0x00007f6b56145645 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.26
> #7 0x00007f6b5614dba4 in gnutls_deinit ()
> from /usr/lib/x86_64-linux-gnu/libgnutls.so.26
> #8 0x00007f6b56a2b139 in _lm_ssl_close (ssl=0x26ba6c0) at lm-ssl-gnutls.c:300
> #9 0x00007f6b56a25e78 in connection_do_close (connection=0x26bb8a0)
> at lm-connection.c:514
> #10 connection_do_close (connection=0x26bb8a0) at lm-connection.c:494
> #11 0x00007f6b56a27b32 in lm_connection_close (connection=0x26bb8a0,
> error=0x0)
> at lm-connection.c:1375
> #12 0x00007f6b56c403bd in server_cleanup ()
> from /usr/lib/irssi/modules/libxmpp_core.so
> #13 0x000000000048e0ba in ?? ()
> #14 0x000000000048e56d in signal_emit ()
> ---Type <return> to continue, or q <return> to quit---
> #15 0x0000000000488ed0 in server_disconnect ()
> #16 0x00007f6b56c4c80e in check_ping_func ()
> from /usr/lib/irssi/modules/libxmpp_core.so
> #17 0x00007f6b58bd8eeb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #18 0x00007f6b58bd8355 in g_main_context_dispatch ()
> from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #19 0x00007f6b58bd8688 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #20 0x00007f6b58bd8744 in g_main_context_iteration ()
> from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #21 0x000000000041905c in main ()
>
> >From what I can tell, it looks like loudmouth is throwing an exception
> and the plugin is not handling it so crashes.
maybe you're seeing something that I fail to recognize, but where do you
see the exception from loudmouth? irssi-plugin-xmpp times out in
check_ping_func(), calls server_disconnect() which is in
irssi-0.8.15:src/core/servers.c:489, which calls
signal_emit("server disconnected", 1, server);
which is irssi's regular way to tell all modules interested in this
event that it has happened. It is handled in many places, both in
irssi-plugin-xmpp and possibly elsewhere, before server_cleanup() gets
it, which was added with signal_add_last(). From there onwards, the
backtrace shows a regular teardown of an xmpp ssl connection, up to the
double-free segfault. So I think this is essentially the same as #499229
or #707758, no?
Sadly, I still have no idea what's corrupting gnutls's / gcrypt's ssl
object, if not otr...
Florian
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