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Subject: Re: [PATCH] xen: Allow xenstored to map /proc/xen/xsd_kva
To:     Anthony PERARD <anthony.perard@citrix.com>,
        selinux-refpolicy@vger.kernel.org
References: <20200714132007.821541-1-anthony.perard@citrix.com>
From:   Chris PeBenito <pebenito@ieee.org>
Message-ID: <a766c125-62da-1566-a084-c6af072d7c20@ieee.org>
Date:   Thu, 16 Jul 2020 09:37:11 -0400
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On 7/14/20 9:20 AM, Anthony PERARD wrote:
> xenstored is using mmap() on /proc/xen/xsd_kva, and when the SELinux
> boolean "domain_can_mmap_files" in CentOS is set to false the mmap()
> call fails.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
> ---
>   policy/modules/system/xen.te | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/policy/modules/system/xen.te b/policy/modules/system/xen.te
> index 1b91b5cbc82a..b3df1f627804 100644
> --- a/policy/modules/system/xen.te
> +++ b/policy/modules/system/xen.te
> @@ -459,6 +459,7 @@ files_read_usr_files(xenstored_t)
>   
>   fs_search_xenfs(xenstored_t)
>   fs_manage_xenfs_files(xenstored_t)
> +allow xenstored_t xenfs_t:file map;
>   
>   term_use_generic_ptys(xenstored_t)

You need to add an interface in filesystem.if that allows the caller to map 
xenfs files and call it from xen.te.

-- 
Chris PeBenito