(gdb) bt
#0  0x081268fd in __ast_pthread_mutex_lock (filename=0x3c53e8 "res_jabber.c", lineno=2244, func=0x3c82c9 "aji_dinfo_handler", 
    mutex_name=0x3c58e9 "&(buddy)->_lock", t=0xc0c) at lock.c:163
#1  0x003b8ae1 in aji_dinfo_handler (data=0xb6a18fe8, pak=0x85dd030) at res_jabber.c:2244
#2  0x00456a8a in iks_filter_packet () from /usr/lib/libiksemel.so.3
#3  0x003b5bc0 in aji_act_hook (data=0xb6a18fe8, type=1, node=0x864265c) at res_jabber.c:1818
#4  0x00454b20 in ?? () from /usr/lib/libiksemel.so.3
#5  0x00452dd3 in iks_parse () from /usr/lib/libiksemel.so.3
#6  0x003b3939 in aji_recv (client=0xb6a18fe8, timeout=1) at res_jabber.c:1425
#7  0x003bb3b8 in aji_recv_loop (data=0xb6a18fe8) at res_jabber.c:2803
#8  0x081addfd in dummy_start (data=0xb6a17cb0) at utils.c:1010
#9  0x0052d96e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0x00e9198e in clone () from /lib/tls/i686/cmov/libc.so.6