Bug 1277198

Summary:	pppd segfaults with dump option
Product:	Red Hat Enterprise Linux 7	Reporter:	Jaroslav Aster <jaster>
Component:	ppp	Assignee:	Jaroslav Škarvada <jskarvad>
Status:	CLOSED WONTFIX	QA Contact:	qe-baseos-daemons
Severity:	high	Docs Contact:
Priority:	medium
Version:	7.2	CC:	msekleta, pwouters, thozza
Target Milestone:	rc	Keywords:	FastFix, Patch
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1197792	Environment:
Last Closed:	2019-12-06 16:06:17 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jaroslav Aster 2015-11-02 16:21:34 UTC

The same issue on rhel-7.

ppp-2.4.5-33.el7

+++ This bug was initially created as a clone of Bug #1197792 +++

Description of problem:

pppd segfaults with dump option in configuration file on server site in xl2tpd VPN.

Version-Release number of selected component (if applicable):

ppp-2.4.5-8.el6


How reproducible:

Always.


Steps to Reproduce:
1. Configure client and server

SERVER
-------
a, install ppp and xl2tpd (from epel)

# yum --enablerepo=epel install ppp xl2tpd

b, configure server

# cat /etc/ppp/options.xl2tpd 
dump

# cat /etc/xl2tpd/xl2tpd.conf 
[global]
listen-addr = _SERVER_IP_CHANGE_

[lns default]
name = server
pppoptfile = /etc/ppp/options.xl2tpd
ppp debug = yes
require chap = yes
refuse pap = yes
require authentication = yes
ip range = 192.168.0.1-192.168.0.253
local ip = 192.168.0.254

# cat /etc/ppp/chap-secrets
client * "redhat123" *

c, start server

# service xl2tpd start

CLIENT
------
a, install ppp and xl2tpd (from epel)

yum --enablerepo=epel install ppp xl2tpd

b, configure client

# cat /etc/ppp/options.xl2tpd 
#nothing here

# cat /etc/xl2tpd/xl2tpd.conf
[global]
listen-addr = _CLIENT_IP_CHANGE_
debug network = yes

[lac server]
name = client
pppoptfile = /etc/ppp/options.xl2tpd
ppp debug = yes
lns = _SERVER_IP_CHANGE_

# cat /etc/ppp/chap-secrets
client * "redhat123" *

c, start client

# service xl2tpd start
# xl2tpd-control connect server


Actual results:

Segfault and no established vpn.

# cat /var/log/messages
...
Mar  2 16:48:04 sheep-26 pppd[4460]: Plugin pppol2tp.so loaded.
Mar  2 16:48:04 sheep-26 pppd[4460]: pppd options in effect:
Mar  2 16:48:04 sheep-26 pppd[4460]: debug#011#011# (from command line)
Mar  2 16:48:04 sheep-26 pppd[4460]: nodetach#011#011# (from command line)
Mar  2 16:48:04 sheep-26 pppd[4460]: dump#011#011# (from /etc/ppp/options.xl2tpd)
Mar  2 16:48:04 sheep-26 pppd[4460]: plugin pppol2tp.so#011#011# (from command line)
Mar  2 16:48:04 sheep-26 pppd[4460]: require-chap#011#011# (from command line)
Mar  2 16:48:04 sheep-26 pppd[4460]: refuse-pap#011#011# (from command line)
Mar  2 16:48:04 sheep-26 pppd[4460]: name server#011#011# (from command line)
Mar  2 16:48:04 sheep-26 kernel: pppd[4460]: segfault at 0 ip 0092e8bb sp bf9d62d0 error 4 in pppd[90d000+4c000]
...

Expected results:

No segfault and established vpn.

SERVER
-------
# ip a show dev ppp0
5: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp 
    inet 192.168.0.254 peer 192.168.0.1/32 scope global ppp0

CLIENT
------
# ip a show dev ppp0
153: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp 
    inet 192.168.0.1 peer 192.168.0.254/32 scope global ppp0

Additional info:

Comment 1 Paul Wouters 2016-05-10 20:34:57 UTC

this should really get into rhel7 - I had to grab fedora's ppp to get my DSL working without pppd segfaulting, and then i ran into other bugs (one of them I reported at https://bugzilla.redhat.com/show_bug.cgi?id=1334913

Comment 6 Tomáš Hozza 2019-12-06 16:06:12 UTC

Red Hat Enterprise Linux version 7 entered the Maintenance Support 1 Phase in August 2019. In this phase only qualified Critical and Important Security errata advisories (RHSAs) and Urgent Priority Bug Fix errata advisories (RHBAs) may be released as they become available. Other errata advisories may be delivered as appropriate.

This bug has been reviewed by Support and Engineering representative and does not meet the inclusion criteria for Maintenance Support 1 Phase. If this issue still exists in newer major version of Red Hat Enterprise Linux, it has been cloned there and work will continue in the cloned bug.

For more information about Red Hat Enterprise Linux Lifecycle, please see https://access.redhat.com/support/policy/updates/errata/

Comment 7 RHEL Program Management 2019-12-06 16:06:17 UTC

Development Management has reviewed and declined this request. You may appeal this decision by using your Red Hat support channels, who will make certain  the issue receives the proper prioritization with product and development management.

https://www.redhat.com/support/process/production/#howto