I built a version of pptp with debug enabled, and caught the
segmentation fault again. This time I get the following in the syslog
file:
{{{
Nov 16 23:07:33 paul-ubuntu pptp[5592]: nm-pptp-service-5464
log[decaps_gre:pptp_gre.c:414]: buffering packet 1323 (expecting 1322, lost or
reordered)
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[logecho:pptp_ctrl.c:677]: Echo Request received.
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 6 'Echo-Reply'
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[pptp_read_some:pptp_ctrl.c:551]: read error: Connection reset by peer
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[callmgr_main:pptp_callmgr.c:258]: Closing connection (shutdown)
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[pptp_send_ctrl_packet:pptp_ctrl.c:622]: write error: Broken pipe
Nov 16 23:08:09 paul-ubuntu pptp[5598]: nm-pptp-service-5464
log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Nov 16 23:08:09 paul-ubuntu kernel: [ 6282.854809] pptpcm[5598]: segfault at
c0bbb964 ip 0804d3f0 sp bf8dcb40 error 5 in pptp[8048000+e000]
}}}
Then using gdb on the core bump extracted from apport's crash report I
get the following:
{{{
(gdb) where
#0 0x0804d3f0 in pptp_fd_set (conn=0x96f6858, read_set=0xbf8dcc3c,
write_set=0xbf8dcbbc, max_fd=0xbf8dce34) at pptp_ctrl.c:464
#1 0x08052e7f in callmgr_main (argc=3, argv=0xbf8dcf1c, envp=0xbf8de2dc) at
pptp_callmgr.c:266
#2 0x0804a8e0 in launch_callmgr (inetaddr=..., phonenr=0x0, argc=5,
argv=0xbf8de2c4, envp=0xbf8de2dc) at pptp.c:505
#3 0x0804a722 in open_callmgr (inetaddr=..., phonenr=0x0, argc=5,
argv=0xbf8de2c4, envp=0xbf8de2dc, pty_fd=0, gre_fd=4) at pptp.c:474
#4 0x0804a225 in main (argc=5, argv=0xbf8de2c4, envp=0xbf8de2dc) at pptp.c:375
}}}
The call that causes the fault appears to be the one at pptp_callmgr.c
line 266 where it is doing the 'shutdown' steps.
--
kernel: pptpcm[32528]: segfault at d6a1ec30 ip 0804d6b1 sp bfa3e0e0 error 5 in
pptp[8048000+f000]
https://bugs.launchpad.net/bugs/356978
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
