[PATCH 1/1] grant permission to map security_t

[PATCH 1/1] grant permission to map security_t

[Sugar, David]

I'm seeing the following denial while installing RPMs.  

type=AVC msg=audit(1560944462.698:217): avc:  denied  { map } for pid=1265 comm="rpm" path="/sys/fs/selinux/status" dev="selinuxfs" ino=19 scontext=system_u:system_r:rpm_t:s0 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1

The RedHat targeted policy has the change in this patch.  I'm not sure if this is preferred, or
if it would be better to create a new interface 'selinux_map_security_files' (or similar).

Signed-off-by: Dave Sugar <dsugar@tresys.com>
---
 policy/modules/kernel/selinux.if | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/policy/modules/kernel/selinux.if b/policy/modules/kernel/selinux.if
index 6790e5d0..f0504613 100644
--- a/policy/modules/kernel/selinux.if
+++ b/policy/modules/kernel/selinux.if
@@ -492,7 +492,7 @@ interface(`selinux_validate_context',`
 
 	dev_search_sysfs($1)
 	allow $1 security_t:dir list_dir_perms;
-	allow $1 security_t:file rw_file_perms;
+	allow $1 security_t:file { map rw_file_perms };
 	allow $1 security_t:security check_context;
 ')
 
-- 
2.21.0

Re: [PATCH 1/1] grant permission to map security_t

[Chris PeBenito]

On 7/2/19 11:31 AM, Sugar, David wrote:
> I'm seeing the following denial while installing RPMs.
> 
> type=AVC msg=audit(1560944462.698:217): avc:  denied  { map } for pid=1265 comm="rpm" path="/sys/fs/selinux/status" dev="selinuxfs" ino=19 scontext=system_u:system_r:rpm_t:s0 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1
> 
> The RedHat targeted policy has the change in this patch.  I'm not sure if this is preferred, or
> if it would be better to create a new interface 'selinux_map_security_files' (or similar).

That would be preferred, as this is not a typical behavior.


> Signed-off-by: Dave Sugar <dsugar@tresys.com>
> ---
>   policy/modules/kernel/selinux.if | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/policy/modules/kernel/selinux.if b/policy/modules/kernel/selinux.if
> index 6790e5d0..f0504613 100644
> --- a/policy/modules/kernel/selinux.if
> +++ b/policy/modules/kernel/selinux.if
> @@ -492,7 +492,7 @@ interface(`selinux_validate_context',`
>   
>   	dev_search_sysfs($1)
>   	allow $1 security_t:dir list_dir_perms;
> -	allow $1 security_t:file rw_file_perms;
> +	allow $1 security_t:file { map rw_file_perms };
>   	allow $1 security_t:security check_context;
>   ')
>   
> 


-- 
Chris PeBenito