Please help me in resolving this issue
Srinivasa Rao Ragolu
sragolu at mvista.com
Wed Aug 19 12:34:28 UTC 2015
Hi Daniel,
Please see the output of security contexts. Also no usr is mounted.
root at arm-cortex-a15:~# ls -lZ /bin/login*
lrwxrwxrwx. 1 root root system_u:object_r:bin_t:s0 17 Aug 18
15:06 /bin/login -> /bin/login.shadow
-rwxr-xr-x. 1 root root system_u:object_r:login_exec_t:s0 31756 Aug 12
07:18 /bin/login.shadow
root at arm-cortex-a15:~# mount
/dev/root on / type ext2 (rw,relatime,seclabel)
sysfs on /sys type sysfs (rw,relatime,seclabel)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
proc on /proc type proc (rw,relatime)
none on /dev type devtmpfs
(rw,relatime,seclabel,size=514956k,nr_inodes=128739,mode=755)
devpts on /dev/pts type devpts
(rw,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /var/volatile type tmpfs (rw,relatime,seclabel)
tmpfs on /media/ram type tmpfs (rw,relatime,seclabel)
please guide if you find an clue from above output
Thanks,
Srinivas.
On Wed, Aug 19, 2015 at 12:38 AM, Daniel J Walsh <dwalsh at redhat.com> wrote:
> ls -lZ /usr/bin/login*
>
> By any chance is the /usr directory mounted NOSUID?
>
>
> On 08/18/2015 07:58 AM, Srinivasa Rao Ragolu wrote:
>
> Hi,
>
> I am building for embedded platform. Could not able to get exact version.
> But can provide info about recipe in yocto.
>
>
> http://git.yoctoproject.org/cgit/cgit.cgi/meta-selinux/tree/recipes-security/refpolicy/
>
> http://git.yoctoproject.org/cgit/cgit.cgi/meta-selinux/tree/recipes-security/refpolicy/refpolicy-targeted_git.bb
>
> Any pointers please?
>
> Thanks,
> Srinivas.
>
> On Tue, Aug 18, 2015 at 8:17 PM, Miroslav Grepl <mgrepl at redhat.com> wrote:
>
>> On 08/18/2015 04:37 PM, Srinivasa Rao Ragolu wrote:
>> > Hi Daniel,
>> >
>> > I have checked the file_contexts file
>> >
>> > * #grep :login_exec_t contexts/files/file_contexts*
>> > /bin/login--system_u:object_r:login_exec_t:s0
>> > /bin/login\.shadow--system_u:object_r:login_exec_t:s0
>> > /bin/login\.tinylogin--system_u:object_r:login_exec_t:s0
>> > /usr/kerberos/sbin/login\.krb5--system_u:object_r:login_exec_t:s0
>> >
>> > Now If I run with permissive mode. I Could see below login programs are
>> > running
>> > (Here I gave unconfined_r as role and s0 as range)
>> >
>> > * 1109 root 3540 S /bin/login --*
>> > * 1111 root 0 SW [kauditd]*
>> > * 1113 root 3020 S -sh*
>> > *
>> > *
>> > But when I run with enforcing mode I get same error
>> >
>> > /*arm-cortex-a15 login: root*/
>> > /*Last login: Tue Aug 18 11:36:58 UTC 2015 on console*/
>> > /*Would you like to enter a security context? [N] Y*/
>> > /*role: unconfined_r*/
>> > /*level: s0*/
>> > /*[ 1252.885468] type=1400 audit(1439898856.140:13): avc: denied {
>> > transition } for pid=1120 comm="login" path="/bin/bash" dev="mmcblk0"
>> > ino=58115 scontext=system_u:system_r:init_t:s0
>> > tcontext=unconfined_u:unconfined_r:unconfined_t:s0 tclass=process*/
>> > /*[ 1252.887219] type=1400 audit(1439898856.140:14): avc: denied {
>> > transition } for pid=1120 comm="login" path="/bin/bash" dev="mmcblk0"
>> > ino=58115 scontext=system_u:system_r:init_t:s0
>> > tcontext=unconfined_u:unconfined_r:unconfined_t:s0 tclass=process*/
>> > /*Cannot execute /bin/sh: Permission denied*/
>> > /*
>> > */
>> > /*MontaVista Carrier Grade Linux 7.0.0 arm-cortex-a15 /dev/console*/
>> > /*
>> > */
>> > /*arm-cortex-a15 login:*/
>> > /*
>> > */
>> > /*
>> > */
>> > /Please guide me what is going wrong and how to resolve this issue./
>> > /
>> > /
>> > /Thanks,/
>> > /Srinivas./
>> >
>> > On Tue, Aug 18, 2015 at 6:52 PM, Daniel J Walsh < <dwalsh at redhat.com>
>> dwalsh at redhat.com
>> > <mailto: <dwalsh at redhat.com>dwalsh at redhat.com>> wrote:
>> >
>> > What is the path to the login program? What is it labeled? The
>> > problem is login is running with the wrong context.
>> >
>> > It should be labeled login_exec_t
>> >
>> > grep :login_exec_t
>> /etc/selinux/targeted/contexts/files/file_contexts
>> > /bin/login -- system_u:object_r:login_exec_t:s0
>> > /usr/bin/login -- system_u:object_r:login_exec_t:s0
>> > /usr/kerberos/sbin/login\.krb5 --
>> > system_u:object_r:login_exec_t:s0
>> >
>> >
>> > init_t is supposed to transition to local_login_t when executing the
>> > login program.
>> >
>> >
>> > On 08/18/2015 06:17 AM, Srinivasa Rao Ragolu wrote:
>> >> Hi Daniel,
>> >>
>> >> Thanks for quick reply. Please find first time boot log with
>> >> lableling and reboot.
>> >>
>> >> Also find second time boot log when I created /.autorelablel.
>> >>
>> >> Somehow I could not able to login as root.
>> >>
>> >> Your help is really appriciated.
>> >>
>> >> Thanks,
>> >> Srinivas.
>> >>
>> >> On Tue, Aug 18, 2015 at 6:16 PM, Daniel J Walsh <dwalsh at redhat.com
>> >> <mailto: <dwalsh at redhat.com>dwalsh at redhat.com>> wrote:
>> >>
>> >> Looks like you have a labeling issue.
>> >>
>> >> touch /.autorelabel; reboot
>> >>
>> >> Should fix the issues.
>> >>
>> >>
>> >>
>> >> On 08/18/2015 04:53 AM, Srinivasa Rao Ragolu wrote:
>> >>> Hi All,
>> >>>
>> >>> I have very new to selinux. Today I have ported selinux to my
>> >>> embedded platform with targeted policy+enforcing.
>> >>>
>> >>> When I try to boot, it completes labeling filesystem. But I
>> >>> could not able to login using root.. See my error log...
>> >>>
>> >>> /*arm-cortex-a15 login: root*/
>> >>> /*Last login: Tue Aug 18 11:36:58 UTC 2015 on console*/
>> >>> /*Would you like to enter a security context? [N] Y*/
>> >>> /*role: unconfined_r*/
>> >>> /*level: s0*/
>> >>> /*[ 1252.885468] type=1400 audit(1439898856.140:13): avc:
>> >>> denied { transition } for pid=1120 comm="login"
>> >>> path="/bin/bash" dev="mmcblk0" ino=58115
>> >>> scontext=system_u:system_r:init_t:s0
>> >>> tcontext=unconfined_u:unconfined_r:unconfined_t:s0
>> >>> tclass=process*/
>> >>> /*[ 1252.887219] type=1400 audit(1439898856.140:14): avc:
>> >>> denied { transition } for pid=1120 comm="login"
>> >>> path="/bin/bash" dev="mmcblk0" ino=58115
>> >>> scontext=system_u:system_r:init_t:s0
>> >>> tcontext=unconfined_u:unconfined_r:unconfined_t:s0
>> >>> tclass=process*/
>> >>> /*Cannot execute /bin/sh: Permission denied*/
>> >>> /*
>> >>> */
>> >>> /*MontaVista Carrier Grade Linux 7.0.0 arm-cortex-a15
>> >>> /dev/console*/
>> >>> /*
>> >>> */
>> >>> /*arm-cortex-a15 login:*/
>> >>> /*
>> >>> */
>> >>> Please help me.. How can I solve this issue and achieve
>> >>> normal boot.
>> >>>
>> >>>
>> >>> Thanks,
>> >>> Srinivas.
>> >>>
>> >>>
>> >>> --
>> >>> selinux mailing list
>> >>> selinux at lists.fedoraproject.org
>> >>> <mailto: <selinux at lists.fedoraproject.org>
>> selinux at lists.fedoraproject.org>
>> >>> <https://admin.fedoraproject.org/mailman/listinfo/selinux>
>> https://admin.fedoraproject.org/mailman/listinfo/selinux
>> >>
>> >>
>> >>
>> >>
>> >> --
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>> >> <mailto:selinux at lists.fedoraproject.org>
>> >> https://admin.fedoraproject.org/mailman/listinfo/selinux
>> >
>> >
>> >
>> >
>> > --
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>> > https://admin.fedoraproject.org/mailman/listinfo/selinux
>> >
>>
>> What does
>>
>> $ rpm -q selinux-policy-targeted
>>
>> ?
>>
>> Also could you try to reinstall the selinux-policy-targeted to see if it
>> blows up?
>>
>> --
>> Miroslav Grepl
>> Senior Software Engineer, SELinux Solutions
>> Red Hat, Inc.
>>
>
>
>
> --
> selinux mailing listselinux at lists.fedoraproject.orghttps://admin.fedoraproject.org/mailman/listinfo/selinux
>
>
>
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