Hi all & hi Daniel ,
We had a crash with version 4.0.5 today .
I looks like it happens due to a race condition between a provisional response
(183) and the generation of a 408 .
We send the INVITE, get a `100 Trying` from upstream , then we get a `183
Session Progress` from upstream , then after exactly 1 minute , we get another
`183 Session Progress` from upstream. At this moment kamailio crashed.
Some tm params we have :
modparam("tm", "fr_timer", 5000)
modparam("tm", "fr_inv_timer", 60000) <- our final reply timer is 1 minute .
modparam("tm", "restart_fr_on_each_reply", 1)
GDB output and logs here:
kamailio 4.0.5 crash - in fake_req() - race cond - Pastebin.com
kamailio 4.0.5 crash - in fake_req() - race cond - Paste...
(gdb) bt #0 0x00007f4d93129a32 in memcpy () from /lib64/libc.so.6
View on pastebin.com Preview by Yahoo
In fake_req() from t_reply.c , the pointer shmem_msg->new_uri.s which is passed
to memcpy becomes invalid.
memcpy( faked_req->new_uri.s, shmem_msg->new_uri.s,faked_req->new_uri.len);
(gdb) p shmem_msg->new_uri
$3 = {s = 0x0, len = 0}
If this bug is not supposed to be fixed in 4.2.0 , we can help with debugging .
Regards,
Dragos_______________________________________________
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