tough neverallow

[Henry Zhang]

Hi folks,

I meet a tough neverallow problem:
(neverallow base_typeattr_8 self (capability (sys_module)))
|     <root>
|     allow at
/mnt/disk2/henryzhang/sec-4715/connectivity-bsp/build-ctx0700-updater/tmp/work/ctx0700-fsl-linux/refpolicy-mcs/2.20190201-r0/image/var/lib/selinux/mcs/tmp/modules/100/ota_client/cil:678
|       (allow ota_client_t self (capability (net_raw sys_module sys_resource
mknod)))

The SELinux interface does not contain ota_client_t but file
usr/share/selinux/devel/include/system/unconfined.if: allow $1
self:capability ~{ sys_module };

I do not know how to make following worked
allow ota_client_t self (capability (net_raw sys_module sys_resource mknod))

Please advise.

Thanks.

----henry

[Simon Sekidde]

On Thu, Feb 23, 2023 at 12:38 PM Henry Zhang <henryzhang62(a)gmail.com&gt; wrote:

>  Hi folks,
>
>  I meet a tough neverallow problem:
>  (neverallow base_typeattr_8 self (capability (sys_module)))
>  |     <root>
>  |     allow at
>
> /mnt/disk2/henryzhang/sec-4715/connectivity-bsp/build-ctx0700-updater/tmp/work/ctx0700-fsl-linux/refpolicy-mcs/2.20190201-r0/image/var/lib/selinux/mcs/tmp/modules/100/ota_client/cil:678
>  |       (allow ota_client_t self (capability (net_raw sys_module sys_resource
>  mknod)))
>
>  The SELinux interface does not contain ota_client_t but file
>  usr/share/selinux/devel/include/system/unconfined.if: allow $1
>  self:capability ~{ sys_module };
>
>  I do not know how to make following worked
>  allow ota_client_t self (capability (net_raw sys_module sys_resource
>  mknod))
>  
Does the ota_client app need these caps? See capabilities(7) or
/usr/include/linux/capability.h
Are you able to manage the app with a confined user like sysadm_u instead?


>  Please advise.
>
>  Thanks.
>
>  ----henry
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-- 

Simon Sekidde

[Henry Zhang]

Simon,

kernel.if of SELinux contains self and I copy attribute and typeattribute
to make ota_client_t accessing self so that
"allow ota_client_t self: capability sys_module" works

---henry

On Fri, Feb 24, 2023 at 8:46 PM Simon Sekidde <ssekidde(a)redhat.com&gt; wrote:

>  On Thu, Feb 23, 2023 at 12:38 PM Henry Zhang
> <henryzhang62(a)gmail.com&gt;
>  wrote:
>
> > Hi folks,
> >
> > I meet a tough neverallow problem:
> > (neverallow base_typeattr_8 self (capability (sys_module)))
> > |     <root>
> > |     allow at
> >
> /mnt/disk2/henryzhang/sec-4715/connectivity-bsp/build-ctx0700-updater/tmp/work/ctx0700-fsl-linux/refpolicy-mcs/2.20190201-r0/image/var/lib/selinux/mcs/tmp/modules/100/ota_client/cil:678
> > |       (allow ota_client_t self (capability (net_raw sys_module sys_resource
> > mknod)))
> >
> > The SELinux interface does not contain ota_client_t but file
> > usr/share/selinux/devel/include/system/unconfined.if: allow $1
> > self:capability ~{ sys_module };
> >
> > I do not know how to make following worked
> > allow ota_client_t self (capability (net_raw sys_module sys_resource
> > mknod))
> >
>
>  Does the ota_client app need these caps? See capabilities(7) or
>  /usr/include/linux/capability.h
>  Are you able to manage the app with a confined user like sysadm_u instead?
>
>
> > Please advise.
> >
> > Thanks.
> >
> > ----henry
> > _______________________________________________
> > selinux mailing list -- selinux(a)lists.fedoraproject.org
> > To unsubscribe send an email to selinux-leave(a)lists.fedoraproject.org
> > Fedora Code of Conduct:
> > https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > List Archives:
> > https://lists.fedoraproject.org/archives/list/[e-mail]...
> > Do not reply to spam, report it:
> > https://pagure.io/fedora-infrastructure/new_issue
> >
>
>
>  --
>
>  Simon Sekidde
>
>
>