On 8 July 2016 at 01:41, William Roberts <[email protected]> wrote:

>
> On Jul 7, 2016 1:13 PM, "YongQin Liu" <[email protected]> wrote:
> >
> > Hi, ALL
> >
> > When I try AOSP master with the hikey board, I see following sys_module
> denial on netd domain.
> >
> >> avc: denied { sys_module } for pid=1775 comm="netd" capability=16
> scontext=u:r:netd:s0 tcontext=u:r:netd:s0 tclass=capability permissive=0
> >
> >
> > After some check, I found it was caused by "capable(CAP_SYS_MODULE)"
> call in dev_load method of the kernel net/core/dev_ioctl.c file here:
> >
> >
> https://android.googlesource.com/kernel/hikey-linaro/+/refs/heads/android-hikey-linaro-4.4/net/core/dev_ioctl.c#371
> >
> >
> > When I comment the capable(CAP_SYS_MODULE) check, there is no
>  sys_module denial output.
> >
> > I did not dig into the implementation of capable, but should not it just
> return false without the sys_module denial?
> >
> > Could anyone please help point to the source where I should check, why
> the  sys_module denial is output?
>
> From what I know is the cap check is separate. This denial is on
> finit_module. See this patch:
>
> http://comments.gmane.org/gmane.comp.security.selinux/24164
>
Thanks, William!
Will check it.


-- 
Best Regards,
Yongqin Liu
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