Fatal signal 6

[Alexander Samoylyk]

Binary package hint: ppp

After upgrading to Itrepid (ppp 2.4.4rel-9ubuntu2 -> 2.4.4rel-10ubuntu2) it became impossible to create pptp-tunnels. I changed nothing in configuration after upgrade. When I downgrade ppp to 2.4.4rel-9ubuntu2 everything works fine.

The error is "Fatal signal 6". How to track that down? What can it be?

The full debug log of session:

Oct 31 09:09:59 server pppd[78791]: Plugin radius.so loaded.
Oct 31 09:09:59 server pppd[78791]: RADIUS plugin initialized.
Oct 31 09:09:59 server pppd[78791]: Plugin radattr.so loaded.
Oct 31 09:09:59 server pppd[78791]: RADATTR plugin initialized.
Oct 31 09:09:59 server pptp[78791]: Plugin pptp.so loaded.
Oct 31 09:09:59 server pptp[78791]: PPTP plugin version 0.7.13 compiled for pppd-2.4.4, linux-2.6.27.2
Oct 31 09:09:59 server pptp[78791]: pppd 2.4.4 started by root, uid 0
Oct 31 09:09:59 server pptp[78791]: using channel 4579
Oct 31 09:09:59 server pptp[78791]: Using interface ppp1
Oct 31 09:09:59 server pptp[78791]: Connect: ppp1 <--> pptp (XXX.XXX.XXX.XXX)
Oct 31 09:09:59 server pptp[78791]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x123d78e2> <pcomp> <accomp>]
Oct 31 09:09:59 server pptp[78791]: rcvd [LCP ConfReq id=0x0 <mru 1400> <magic 0x2043406c> <pcomp> <accomp> <callback CBCP>]
Oct 31 09:09:59 server pptp[78791]: sent [LCP ConfRej id=0x0 <callback CBCP>]
Oct 31 09:09:59 server pptp[78791]: rcvd [LCP ConfReq id=0x1 <mru 1400> <magic 0x2043406c> <pcomp> <accomp>]
Oct 31 09:09:59 server pptp[78791]: sent [LCP ConfAck id=0x1 <mru 1400> <magic 0x2043406c> <pcomp> <accomp>]
Oct 31 09:10:02 server pptp[78791]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x123d78e2> <pcomp> <accomp>]
Oct 31 09:10:02 server pptp[78791]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0x123d78e2> <pcomp> <accomp>]
Oct 31 09:10:02 server pptp[78791]: sent [LCP EchoReq id=0x0 magic=0x123d78e2]
Oct 31 09:10:02 server pptp[78791]: sent [CHAP Challenge id=0xb4 <7c4cf5ceec08ea00c4f49155a5414e02>, name = "pptpd"]
Oct 31 09:10:02 server pptp[78791]: rcvd [LCP Ident id=0x2 magic=0x2043406c "MSRASV5.10"]
Oct 31 09:10:02 server pptp[78791]: rcvd [LCP Ident id=0x3 magic=0x2043406c "MSRAS-0-NAME"]
Oct 31 09:10:02 server pptp[78791]: rcvd [LCP EchoRep id=0x0 magic=0x2043406c]
Oct 31 09:10:02 server pptp[78791]: rcvd [CHAP Response id=0xb4 <d3753acb5ccddf79415040021e69b2f80000000000000000fe276eb935df54fea7dd10479ae45346ac491945899a4fdb00>, name = "some-login"]
Oct 31 09:10:02 server pptp[78791]: RADATTR plugin wrote 3 line(s) to file /var/run/radattr.ppp1.
Oct 31 09:10:02 server pptp[78791]: sent [CHAP Success id=0xb4 "S=F4F46C682887F63B3EA1184EA72E32FAB155BA50"]
Oct 31 09:10:02 server pptp[78791]: sent [IPCP ConfReq id=0x1 <addr XXX.XXX.XXX.XXX>]
Oct 31 09:10:02 server pptp[78791]: rcvd [CCP ConfReq id=0x4 <mppe +H -M -S -L -D +C>]
Oct 31 09:10:02 server pptp[78791]: sent [CCP ConfReq id=0x1]
Oct 31 09:10:02 server pptp[78791]: sent [CCP ConfRej id=0x4 <mppe +H -M -S -L -D +C>]
Oct 31 09:10:02 server pptp[78791]: rcvd [IPCP ConfReq id=0x5 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-wins 0.0.0.0> <ms-dns3 0.0.0.0> <ms-wins 0.0.0.0>]
Oct 31 09:10:02 server pptp[78791]: sent [IPCP ConfRej id=0x5 <ms-wins 0.0.0.0> <ms-wins 0.0.0.0>]
Oct 31 09:10:02 server pptp[78791]: rcvd [IPCP ConfAck id=0x1 <addr XXX.XXX.XXX.XXX>]
Oct 31 09:10:02 server pptp[78791]: rcvd [CCP ConfAck id=0x1]
Oct 31 09:10:02 server pptp[78791]: rcvd [CCP TermReq id=0x6" C@l\000<\37777777715t\000\000\002\37777777734"]
Oct 31 09:10:02 server pptp[78791]: sent [CCP TermAck id=0x6]
Oct 31 09:10:02 server pptp[78791]: rcvd [IPCP ConfReq id=0x7 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
Oct 31 09:10:02 server pptp[78791]: sent [IPCP ConfNak id=0x7 <addr XXX.XXX.XXX.XXX> <ms-dns1 XXX.XXX.XXX.XXX> <ms-dns3 XXX.XXX.XXX.XXX>]
Oct 31 09:10:02 server pptp[78791]: rcvd [IPCP ConfReq id=0x8 <addr XXX.XXX.XXX.XXX> <ms-dns1 XXX.XXX.XXX.XXX> <ms-dns3 XXX.XXX.XXX.XXX>]
Oct 31 09:10:02 server pptp[78791]: sent [IPCP ConfAck id=0x8 <addr XXX.XXX.XXX.XXX> <ms-dns1 XXX.XXX.XXX.XXX> <ms-dns3 XXX.XXX.XXX.XXX>]
Oct 31 09:10:02 server pptp[78791]: found interface eth1 for proxy arp
Oct 31 09:10:02 server pptp[78791]: local IP address XXX.XXX.XXX.XXX
Oct 31 09:10:02 server pptp[78791]: remote IP address XXX.XXX.XXX.XXX
Oct 31 09:10:02 server pptp[78791]: Fatal signal 6
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 31 09:10:02 server pptp[78791]: RADATTR plugin removed file /var/run/radattr.ppp1.
Oct 31 09:10:02 server pptp[78791]: Exit.

lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10

apt-cache policy ppp
ppp:
  Installed: 2.4.4rel-10ubuntu2
  Candidate: 2.4.4rel-10ubuntu2
  Version table:
 *** 2.4.4rel-10ubuntu2 0
        500 http://ua.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

[Alexander Sack (asac)]

could you check the jaunty packages please? those are 2.4.5 from git.

[Alex Denvir (coldfff)]

We are closing this bug report because it has not been updated for some time. Please reopen it if you have more information to submit, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

[Adm USN (adm-5)]

I have the same error after a few hours pppoe server

pppd[]: Fatal signal 6

pppoe links over 70, pppoe-server run in kernel mode option

/usr/sbin/pppoe-server -N 1000 -k -L 10.128.19.1 -I bond0.19 -R 10.19.0.1 -S nas1

# uname -a
Linux bras-ubnt-01 3.11.0-19-generic #33~precise1-Ubuntu SMP Wed Mar 12 21:16:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

#lsb_release -rd
Description: Ubuntu 12.04.4 LTS
Release: 12.04

#tail -F /var/log/syslog
...
Apr 23 12:11:02 bras-ubnt-01 pppoe-server[65916]: Session 112 created for client 00:19:db:d7:a1:da (10.19.0.112) on bond0.19 using Service-Name 'nas1'
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Plugin /usr/lib/pppd/2.4.5/rp-pppoe.so loaded.
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Plugin radius.so loaded.
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: RADIUS plugin initialized.
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Plugin radattr.so loaded.
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: RADATTR plugin initialized.
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: pppd 2.4.5 started by root, uid 0
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Connected to 00:19:db:d7:a1:da via interface bond0.19
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: using channel 112
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Using interface ppp73
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: Connect: ppp73 <--> bond0.19
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic 0x50026425>]
Apr 23 12:11:02 bras-ubnt-01 pppd[65916]: rcvd [LCP ConfAck id=0x1 <mru 1492> <auth chap MD5> <magic 0x50026425>]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP ConfReq id=0x1 <mru 1480> <magic 0x31d71ce4> <pcomp> <accomp> <callback CBCP> <mrru 1614> <endpoint [local:0e.2d.43.e2.da.10.48.5b.b9.60.7e.35.22.b8.53.9c.00.0
0.00.00]>]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: sent [LCP ConfRej id=0x1 <pcomp> <accomp> <callback CBCP> <mrru 1614> <endpoint [local:0e.2d.43.e2.da.10.48.5b.b9.60.7e.35.22.b8.53.9c.00.00.00.00]>]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP ConfReq id=0x2 <mru 1480> <magic 0x31d71ce4>]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: sent [LCP ConfAck id=0x2 <mru 1480> <magic 0x31d71ce4>]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: sent [LCP EchoReq id=0x0 magic=0x50026425]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: sent [CHAP Challenge id=0xe8 <64b7fff196cd91425181b18f58412b42aa5b06ef327c>, name = "bras-ubnt-01"]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP Ident id=0x3 magic=0x31d71ce4 "MSRASV5.20"]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP Ident id=0x4 magic=0x31d71ce4 "MSRAS-0-\37777777600\37777777604\37777777614\37777777610\37777777615-\37777777617\37777777612"]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP Ident id=0x5 magic=0x31d71ce4 "\37777777672\37777777746\037\37777777606\37777777703U*G\37777777625H\37777777736\37777777750+\37777777734'm"]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [LCP EchoRep id=0x0 magic=0x31d71ce4]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rcvd [CHAP Response id=0xe8 <64f4a028dd8118846c0684bde2e45393>, name = "14111981"]
Apr 23 12:11:04 bras-ubnt-01 pppd[65916]: rc_avpair_gen: received unknown attribute 127 of length 4: 0x7F600000
Apr 23 12:11:0...

[Adm USN (adm-5)]

add for Ubuntu 14.04 LTS

# uname -a
Linux bras-ubnt-01 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

# lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 14.04 LTS
Release: 14.04
Codename: trusty

RP-PPPoE plugin version 3.11
pppd 2.4.5

after few hours

Apr 24 08:19:11 bras-ubnt-01 pppoe-server[119679]: Session 7 created for client 30:85:a9:9c:c8:b7 (10.19.0.7) on bond0.19 using Service-Name 'nas1'
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Plugin /etc/ppp/plugins/rp-pppoe.so loaded.
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: RP-PPPoE plugin version 3.11 compiled against pppd 2.4.5
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Plugin radius.so loaded.
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: RADIUS plugin initialized.
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Plugin radattr.so loaded.
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: RADATTR plugin initialized.
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: pppd 2.4.5 started by root, uid 0
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Connected to 30:85:a9:9c:c8:b7 via interface bond0.19
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: using channel 7
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Using interface ppp1
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: Connect: ppp1 <--> bond0.19
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic 0x716f4b27>]
Apr 24 08:19:11 bras-ubnt-01 pppd[119679]: rcvd [LCP ConfAck id=0x1 <mru 1492> <auth chap MD5> <magic 0x716f4b27>]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP ConfReq id=0x1 <mru 1480> <magic 0x541969c3> <pcomp> <accomp> <callback CBCP>]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: sent [LCP ConfRej id=0x1 <pcomp> <accomp> <callback CBCP>]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP ConfReq id=0x2 <mru 1480> <magic 0x541969c3>]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: sent [LCP ConfAck id=0x2 <mru 1480> <magic 0x541969c3>]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: sent [LCP EchoReq id=0x0 magic=0x716f4b27]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: sent [CHAP Challenge id=0xac <e7fb4ccdd260ad4e7c5b8266820473ba6aa0dd3e0bc2>, name = "bras-ubnt-01"]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP Ident id=0x3 magic=0x541969c3 "MSRASV5.20"]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP Ident id=0x4 magic=0x541969c3 "MSRAS-0-VLADIMIR"]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP Ident id=0x5 magic=0x541969c3 "_\37777777731\37777777744\37777777610d\014\37777777655H\37777777604\001a\37777777750\37777777763\37777777627\37777777762\377777
77762"]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [LCP EchoRep id=0x0 magic=0x541969c3]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rcvd [CHAP Response id=0xac <69475862a674554d28c62a8c43a64ff2>, name = "alisa33"]
Apr 24 08:19:13 bras-ubnt-01 pppd[119679]: rc_avpair_gen: received unknown attribute 127 of length 4: 0x7F60...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Emanuele Rocca (ema)]

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=782450