On 10/27/20 1:22 PM, 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 <[email protected]>
> ---
> v2: Declare an interface instead of using allow in xen.te directly.
> ---
> policy/modules/kernel/filesystem.if | 18 ++++++++++++++++++
> policy/modules/system/xen.te | 1 +
> 2 files changed, 19 insertions(+)
>
> diff --git a/policy/modules/kernel/filesystem.if b/policy/modules/kernel/filesystem.if
> index b52fc769236b..b85ae2f6e851 100644
> --- a/policy/modules/kernel/filesystem.if
> +++ b/policy/modules/kernel/filesystem.if
> @@ -5310,6 +5310,24 @@ interface(`fs_manage_xenfs_files',`
> manage_files_pattern($1, xenfs_t, xenfs_t)
> ')
>
> +########################################
> +## <summary>
> +## Map files a XENFS filesystem.
> +## </summary>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`fs_mmap_xenfs_files',`
> + gen_require(`
> + type xenfs_t;
> + ')
> +
> + allow $1 xenfs_t:file map;
> +')
> +
> ########################################
> ## <summary>
> ## Do not audit attempts to create,
> diff --git a/policy/modules/system/xen.te b/policy/modules/system/xen.te
> index 2c95d0ca3bbd..82328cbbbaa3 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)
> +fs_mmap_xenfs_files(xenstored_t)
>
> term_use_generic_ptys(xenstored_t)
Merged.
--
Chris PeBenito