Troubleshootng the Selunix troubleshooter
Richard Chapman
rchapman at aardvark.com.au
Mon Jan 5 06:10:54 UTC 2009
Hi again Daniel
Here is some more info on this problem - which may be significant...
After checking the link from my last email again I tried:
[root at C5 ~]# fixfiles relabel
Files in the /tmp directory may be labeled incorrectly, this command
can remove all files in /tmp. If you choose to remove files from /tmp,
a reboot will be required after completion.
Do you wish to clean out the /tmp directory [N]? y
Cleaning out /tmp
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 18
has invalid context user_u:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 19
has invalid context user_u:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 20
has invalid context user_u:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 21
has invalid context user_u:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 23
has invalid context user_u:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 40
has invalid context root:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 41
has invalid context root:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 42
has invalid context root:object_r:user_mozilla_home_t:s0
/etc/selinux/targeted/contexts/files/file_contexts.homedirs: line 43
has invalid context root:object_r:user_mozilla_home_t:s0
Exiting after 10 errors.
[root at C5 ~]#
Looks like there is a problem with the policy? Any suggestions how to
resolve this?
Richard.
Richard Chapman wrote:
> 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:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> 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
>> -----BEGIN PGP SIGNATURE-----
>> Version: GnuPG v1.4.9 (GNU/Linux)
>> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
>>
>> iEYEARECAAYFAklhET0ACgkQrlYvE4MpobN/xQCfbPlG+JiHqdeE4hlT74XlRLmR
>> IUQAoJu/VriYRDC2S+89oBxm7DcTN84u
>> =k22P
>> -----END PGP SIGNATURE-----
>>
>>
>
> --
> fedora-selinux-list mailing list
> fedora-selinux-list at redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-selinux-list
>
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