[refpolicy] [PATCH 2/2] fcron socket support

[cpebenito@tresys.com (Christopher J. PeBenito)]

On 04/21/2014 11:08 AM, Sven Vermeulen wrote:
> The fcron daemon creates a socket file in /var/run (called fcron.fifo)
> which is used by the fcrondyn application to interact with the fcron
> daemon. This application allows admins to list the defined jobs, run
> jobs immediately, remove jobs, etc.
> 
> Without this, fcrondyn cannot connect to the cron daemon; fcron also
> logs this at start-up:
> 
> fcron[23724]: Cannot bind socket to '/var/run/fcron.fifo': Permission
> denied
> 
> Through this patch, we allow the crond daemon to create this socket and
> update the admin role to allow the admin domain to stream_connect
> through this socket to the crond_t domain.
> 
> Changes since v1:
> - Moved named file transition outside tunable_policy
> - Use user domain instead of role in cron_admin's stream_connect_pattern

Merged.  I moved the file transition back into the tunable, but dropped the name.  I don't think the name is necessary in this case.  I also added a missing type require for the interface change.

 
> Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
> ---
>  cron.if | 5 +++++
>  cron.te | 2 ++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/cron.if b/cron.if
> index 1303b30..7496a64 100644
> --- a/cron.if
> +++ b/cron.if
> @@ -277,6 +277,11 @@ interface(`cron_admin_role',`
>  		dontaudit $2 cronjob_t:process { ptrace signal_perms };
>  	')
>  
> +	tunable_policy(`crond_fcron',`
> +		# Support for fcrondyn
> +		stream_connect_pattern($2, crond_var_run_t, crond_var_run_t, crond_t)
> +	')
> +
>  	optional_policy(`
>  		gen_require(`
>  			class dbus send_msg;
> diff --git a/cron.te b/cron.te
> index bd8a5cc..89a6620 100644
> --- a/cron.te
> +++ b/cron.te
> @@ -232,6 +232,7 @@ logging_log_filetrans(crond_t, cron_log_t, file)
>  
>  manage_files_pattern(crond_t, crond_var_run_t, crond_var_run_t)
>  files_pid_filetrans(crond_t, crond_var_run_t, file)
> +files_pid_filetrans(crond_t, crond_var_run_t, sock_file, "fcron.fifo")
>  
>  manage_files_pattern(crond_t, cron_spool_t, cron_spool_t)
>  
> @@ -347,6 +348,7 @@ tunable_policy(`allow_polyinstantiation',`
>  
>  tunable_policy(`fcron_crond',`
>  	allow crond_t { system_cron_spool_t user_cron_spool_t }:file manage_file_perms;
> +	allow crond_t crond_var_run_t:sock_file manage_sock_file_perms;
>  ')
>  
>  optional_policy(`
> 


-- 
Chris PeBenito
Tresys Technology, LLC
www.tresys.com | oss.tresys.com