Troubleshootng the Selunix troubleshooter
Richard Chapman
rchapman at aardvark.com.au
Mon Jan 5 05:47:35 UTC 2009
Thanks Daniel
I'm pretty sure you are right - that there is something wrong with the
labelling - but
touch /.autorelabel; reboot
Doesn't seem to cause the relabelling.
I was a bit suspicious that the relabelling didn't work the first time -
because I also did a touch /forcefsck at the boot when I was expecting
relabelling - and it seemed to do 3 fscks - but no obvious relabelling.
I assumed one of the fscks must have really been a relabel - but maybe
not.... Now wehn I do the touch and reboot - there is no delay in the
reboot messages on the system console.
I have found this thread - which seem to describe a similar lack of
relabelling - but doesn't offer a solution:
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=17009&forum=37&post_id=60859
<http://www.centos.org/modules/newbb/viewtopic.php?topic_id=17009&forum=37&post_id=60859>
I haven't tried the 5.3 policy preview yet. Might that help me with the
relabelling?
Thanks again
Richard.
Daniel J Walsh wrote:
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> Richard Chapman wrote:
>
>> Hi.. When I first installed Centos 5.0 - I disabled SELinux at the first
>> sign of trouble. I have now seen the light - and have enabled SELinux
>> on the system which is now updated to Centos 5.2 with Kernel Linux
>> 2.6.18-92.1.22.el5 on x86_64. I initially enabled Selinux in permissive
>> mode - and tried looking at the GUI SELinux Troubleshooter - but it
>> shows no problems. This may be OK - because there are no "type=avc"
>> messages in the audit.log file. However there are thousands of "type=
>> user_avc". Here are the last 20 while in permissive mode:
>>
>> type=USER_AVC msg=audit(1231052785.984:833): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=AddMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.984:834): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=GetNameOwner dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.985:835): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.Hal.Device
>> member=Rescan dest=org.freedesktop.Hal spid=7820 tpid=3667
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.986:836): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_return dest=:1.14 spid=3667 tpid=7820
>> scontext=system_u:system_r:init_t:s0
>> tcontext=user_u:system_r:initrc_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.987:837): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=RemoveMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.987:838): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=AddMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.987:839): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=GetNameOwner dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.988:840): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.Hal.Device
>> member=Rescan dest=org.freedesktop.Hal spid=7820 tpid=3667
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.989:841): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_return dest=:1.14 spid=3667 tpid=7820
>> scontext=system_u:system_r:init_t:s0
>> tcontext=user_u:system_r:initrc_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.990:842): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=RemoveMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.990:843): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=AddMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.990:844): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=GetNameOwner dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.991:845): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.Hal.Device
>> member=Rescan dest=org.freedesktop.Hal spid=7820 tpid=3667
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.991:846): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_return dest=:1.14 spid=3667 tpid=7820
>> scontext=system_u:system_r:init_t:s0
>> tcontext=user_u:system_r:initrc_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.992:847): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=RemoveMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.992:848): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=AddMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.992:849): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=GetNameOwner dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.992:850): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.Hal.Device
>> member=Rescan dest=org.freedesktop.Hal spid=7820 tpid=3667
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.993:851): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_return dest=:1.14 spid=3667 tpid=7820
>> scontext=system_u:system_r:init_t:s0
>> tcontext=user_u:system_r:initrc_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>> type=USER_AVC msg=audit(1231052785.994:852): user pid=2489 uid=81
>> auid=4294967295 subj=system_u:system_r:init_t:s0 msg='avc: denied {
>> send_msg } for msgtype=method_call interface=org.freedesktop.DBus
>> member=RemoveMatch dest=org.freedesktop.DBus spid=7820
>> scontext=user_u:system_r:initrc_t:s0
>> tcontext=system_u:system_r:init_t:s0 tclass=dbus :
>> exe="/bin/dbus-daemon" (sauid=81, hostname=?, addr=?, terminal=?)'
>>
>>
>> If I set the system to Enforcing mode - and log out and log back in -
>> the login seems to run very slowly. If I try to run the gui SELinux
>> Troubleshooter - the application window doesn't come up - but I see the
>> following errors in the boot.log file.
>>
>> Jan 3 16:55:54 C5 dbus: avc: received setenforce notice (enforcing=1)
>> Jan 3 16:56:23 C5 userhelper[24703]: running
>> '/usr/share/system-config-securitylevel/system-config-securitylevel.py'
>> with system_u:system_r:unconfined_t context Jan 3 16:56:23 C5
>> userhelper[24703]: running
>> '/usr/share/system-config-securitylevel/system-config-securitylevel.py'
>> with root privileges on behalf of 'root'
>> Jan 3 16:58:02 C5 gconfd (root-21790): Exiting
>> Jan 3 16:58:02 C5 sshd[21044]: pam_unix(sshd:session): session closed
>> for user nx
>> Jan 3 16:58:02 C5 su: pam_unix(su-l:session): session closed for user root
>> Jan 3 16:58:23 C5 sshd[24747]: Accepted publickey for nx from
>> 192.168.0.2 port 33869 ssh2
>> Jan 3 16:58:23 C5 sshd[24747]: pam_unix(sshd:session): session opened
>> for user nx by (uid=0)
>> Jan 3 16:58:25 C5 su: pam_unix(su-l:session): session opened for user
>> root by (uid=102)
>> Jan 3 16:58:28 C5 dovecot: IMAP(tim): Disconnected: Logged out
>> Jan 3 16:58:30 C5 gconfd (root-25493): starting (version 2.14.0), pid
>> 25493 user 'root'
>> Jan 3 16:58:30 C5 gconfd (root-25493): Resolved address
>> "xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only
>> configuration source at position 0
>> Jan 3 16:58:30 C5 gconfd (root-25493): Resolved address
>> "xml:readwrite:/root/.gconf" to a writable configuration source at
>> position 1
>> Jan 3 16:58:30 C5 gconfd (root-25493): Resolved address
>> "xml:readonly:/etc/gconf/gconf.xml.defaults" to a read-only
>> configuration source at position 2
>> Jan 3 16:58:33 C5 pcscd: winscard.c:304:SCardConnect() Reader E-Gate 0 0
>> Not Found
>> Jan 3 16:58:33 C5 last message repeated 4 times
>> Jan 3 16:58:33 C5 gconfd (root-25493): Resolved address
>> "xml:readwrite:/root/.gconf" to a writable configuration source at
>> position 0
>> Jan 3 16:59:46 C5 gdm[4045]: pam_unix(gdm:session): session opened for
>> user root by (uid=0)
>> Jan 3 16:59:59 C5 pcscd: winscard.c:304:SCardConnect() Reader E-Gate 0 0
>> Not Found
>> Jan 3 16:59:59 C5 last message repeated 4 times
>> Jan 3 17:00:01 C5 crond[25738]: (root) CMD (/var/www/sarg/sarg.cron >
>> /dev/null 2>&1)
>> Jan 3 17:00:01 C5 crond[25740]: (root) CMD
>> (/etc/webmin/webalizer/webalizer.pl /var/log/squid/access.log)
>> Jan 3 17:00:01 C5 crond[25742]: (root) CMD (/etc/webmin/status/monitor.pl)
>> Jan 3 17:00:01 C5 crond[25743]: (root) CMD
>> (/etc/webmin/fetchmail/check.pl --mail rchapman\@aardvark\.com\.au
>> --errors)
>> Jan 3 17:00:01 C5 su: pam_unix(su:session): session opened for user
>> richard by (uid=0)
>> Jan 3 17:00:04 C5 su: pam_unix(su:session): session opened for user
>> postgres by (uid=0)
>> Jan 3 17:00:04 C5 su: pam_unix(su:session): session closed for user
>> postgres
>> Jan 3 17:00:13 C5 su: pam_unix(su:session): session closed for user richard
>> Jan 3 17:01:01 C5 crond[25911]: (root) CMD (run-parts /etc/cron.hourly)
>> Jan 3 17:01:15 C5 userhelper[25928]: running
>> '/usr/share/system-config-securitylevel/system-config-securitylevel.py'
>> with system_u:system_r:unconfined_t context Jan 3 17:01:15 C5
>> userhelper[25928]: running
>> '/usr/share/system-config-securitylevel/system-config-securitylevel.py'
>> with root privileges on behalf of 'root'
>> Jan 3 17:02:18 C5 setroubleshoot: [dbus.ERROR] could not start dbus: Did
>> not receive a reply. Possible causes include: the remote application did
>> not send a reply, the message bus security policy blocked the reply, the
>> reply timeout expired, or the network connection was broken.
>> Jan 3 17:03:06 C5 dovecot: imap-login: Login: user=<tim>, method=PLAIN,
>> rip=192.168.0.199, lip=192.168.0.201
>> Jan 3 17:03:37 C5 dovecot: IMAP(tim): Disconnected: Logged out
>> Jan 3 17:04:14 C5 setroubleshoot: [dbus.ERROR] could not start dbus: Did
>> not receive a reply. Possible causes include: the remote application did
>> not send a reply, the message bus security policy blocked the reply, the
>> reply timeout expired, or the network connection was broken.
>>
>> I have also tried the comand line sealert application - which runs fine
>> - but shows no problems:
>>
>> [root at C5 <mailto:root at C5> ~]# sealert -a /var/log/audit/audit.log
>> 100% donefound 0 alerts in /var/log/audit/audit.log
>> [root at C5 <mailto:root at C5> ~]#
>> It looks to me as if there is some problem (possibly a policy issue)
>> with my dbus connection. and this is preventing the selinux
>> troubleshooter operating in enforcing mode - and also probably causing
>> some other problems in enforcing mode - though no "type-avc" problems
>> show up int eh audit logs.
>>
>> Can anyone explain to me what "type=user_avc" messages are - and why
>> they are not reported by teh gui SELinux troubleshooter or sealert? How
>> should I debug the remainig issues in theis system?
>>
>> All adice appreciated.
>>
>> Richard.
>>
>>
>>
>> --
>> fedora-selinux-list mailing list
>> fedora-selinux-list at redhat.com
>> https://www.redhat.com/mailman/listinfo/fedora-selinux-list
>>
> Please make sure your labeling is correct.
>
> touch /.autorelabel; reboot
>
> Looks like the entire system is running with a signal context which is
> causing you your problems.
>
> You might also want to grab the 5.3 policy, a preview is currently
> available on
>
> http://people.redhat.com/dwalsh/SELinux/RHEL5
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> =k22P
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>
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