[pptp-devel] Segfault in pptpcm

[Lorenzo M. - C.S.I.A. U. <lor...@un...>]

Dear all,
I'm new here and I've just signed up to the mailing list to report a problem
I am facing with pptpclient.

My setup is debian 7 Wheezy with pptp-linux package installed (1.7.2-7
version)
The ppp package installed for dependency is 2.4.5-5.1+deb7u1
The counterpart of the connection is a Windows Server 2012 R2 with a simple
incoming connection enabled (not RRAS). The connection from another windows
8.1 client is working without problems.

The problem is that connection drops after one minute and a half for a
segfault in pptpcm module. As I made the connection persistent, the tunnel
restores, but with the same error after the same amount of time.
Moreover, in that 1.5 minutes window, I can't route any traffic inside the
tunnel, despite I put a rule creating the route upon connection.

Here is the relevant part of the /var/log/messages file:

Apr 14 11:26:47 oldportal2 pppd[62659]: Using interface ppp0
Apr 14 11:26:47 oldportal2 pppd[62659]: Connect: ppp0 <--> /dev/pts/2
Apr 14 11:26:49 oldportal2 pppd[62659]: CHAP authentication succeeded
Apr 14 11:26:49 oldportal2 pppd[62659]: MPPE 128-bit stateless compression
enabled
Apr 14 11:26:51 oldportal2 pppd[62659]: local  IP address 192.168.0.112
Apr 14 11:26:51 oldportal2 pppd[62659]: remote IP address 172.16.0.10
Apr 14 11:28:31 oldportal2 pppd[62659]: Modem hangup
Apr 14 11:28:31 oldportal2 kernel: [412887.322010] pptpcm[62669]: segfault
at 7ffc9d9a42d0 ip 0000000000405634 sp 00007ffc9d645390 error 4 in
pptp[400000+10000]
Apr 14 11:28:31 oldportal2 pppd[62659]: Connect time 1.7 minutes.
Apr 14 11:28:31 oldportal2 pppd[62659]: Sent 0 bytes, received 0 bytes.
Apr 14 11:28:31 oldportal2 pppd[62659]: Connection terminated.

This block of lines is then repeated until I "poff" the pptp connection.

What can I do to obtain correct operation of the PPTP tunnel?
Thanks in advance.

Lorenzo