[PATCH] xen: Allow xenstored to map /proc/xen/xsd_kva

[PATCH] xen: Allow xenstored to map /proc/xen/xsd_kva

[Anthony PERARD]

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)
 
-- 
Anthony PERARD

Re: [PATCH] xen: Allow xenstored to map /proc/xen/xsd_kva

[Chris PeBenito]

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