Re: [PATCH 06/10] Allow alsa_t to create alsa_runtime_t file as well

On 10/11/19 8:24 AM, Laurent Bigonville wrote:
> From: Laurent Bigonville <[email protected]>
> 
> When alsactl is started as a daemon, it creates a pidfile
> (/run/alsactl.pid), that needs to be allowed
> 
> ----
> time->Sun Oct  6 10:59:09 2019
> type=AVC msg=audit(1570352349.743:45): avc:  denied  { write open } for  pid=804 comm="alsactl" path="/run/alsactl.pid" dev="tmpfs" ino=25882 scontext=system_u:system_r:alsa_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1570352349.743:45): avc:  denied  { create } for  pid=804 comm="alsactl" name="alsactl.pid" scontext=system_u:system_r:alsa_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1
> ----
> time->Sun Oct  6 11:54:38 2019
> type=AVC msg=audit(1570355678.226:657): avc:  denied  { open } for  pid=9186 comm="alsactl" path="/run/alsactl.pid" dev="tmpfs" ino=25882 scontext=system_u:system_r:alsa_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1570355678.226:657): avc:  denied  { read } for  pid=9186 comm="alsactl" name="alsactl.pid" dev="tmpfs" ino=25882 scontext=system_u:system_r:alsa_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1
> ----
> time->Sun Oct  6 11:54:38 2019
> type=AVC msg=audit(1570355678.230:659): avc:  denied  { unlink } for  pid=804 comm="alsactl" name="alsactl.pid" dev="tmpfs" ino=25882 scontext=system_u:system_r:alsa_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=1
> 
> Signed-off-by: Laurent Bigonville <[email protected]>
> ---
>   policy/modules/admin/alsa.fc | 1 +
>   policy/modules/admin/alsa.te | 3 ++-
>   2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/policy/modules/admin/alsa.fc b/policy/modules/admin/alsa.fc
> index 75ea9ebf..16ccb7ca 100644
> --- a/policy/modules/admin/alsa.fc
> +++ b/policy/modules/admin/alsa.fc
> @@ -4,6 +4,7 @@ HOME_DIR/\.asoundrc				--	gen_context(system_u:object_r:alsa_home_t,s0)
>   /etc/asound\.conf				--	gen_context(system_u:object_r:alsa_etc_t,s0)
>   
>   /run/alsa(/.*)?						gen_context(system_u:object_r:alsa_runtime_t,s0)
> +/run/alsactl.pid				--	gen_context(system_u:object_r:alsa_runtime_t,s0)

Needs escaping ( \.pid )


>   
>   /usr/bin/ainit					--	gen_context(system_u:object_r:alsa_exec_t,s0)
>   /usr/bin/alsactl				--	gen_context(system_u:object_r:alsa_exec_t,s0)
> diff --git a/policy/modules/admin/alsa.te b/policy/modules/admin/alsa.te
> index e567dd32..9d053c4d 100644
> --- a/policy/modules/admin/alsa.te
> +++ b/policy/modules/admin/alsa.te
> @@ -58,8 +58,9 @@ allow alsa_t alsa_etc_t:file map;
>   can_exec(alsa_t, alsa_exec_t)
>   
>   allow alsa_t alsa_runtime_t:dir manage_dir_perms;
> +allow alsa_t alsa_runtime_t:file manage_file_perms;
>   allow alsa_t alsa_runtime_t:lnk_file manage_lnk_file_perms;
> -files_pid_filetrans(alsa_t, alsa_runtime_t, dir)
> +files_pid_filetrans(alsa_t, alsa_runtime_t, { dir file })
>   
>   manage_dirs_pattern(alsa_t, alsa_tmp_t, alsa_tmp_t)
>   manage_files_pattern(alsa_t, alsa_tmp_t, alsa_tmp_t)
> 


-- 
Chris PeBenito