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* [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
@ 2019-04-09 15:09 Sugar, David
  2019-04-10  1:00 ` Russell Coker
  0 siblings, 1 reply; 9+ messages in thread
From: Sugar, David @ 2019-04-09 15:09 UTC (permalink / raw)
  To: selinux-refpolicy

This patch is based on comments from previous a patch to
remove the many uses of kernel_dgram_send() and incorporate
it into logging_send_syslog_msg().

Signed-off-by: Dave Sugar <dsugar@tresys.com>
---
 policy/modules/admin/aide.te       | 1 -
 policy/modules/admin/usermanage.te | 5 -----
 policy/modules/services/dbus.te    | 3 ---
 policy/modules/system/authlogin.te | 5 -----
 policy/modules/system/init.if      | 2 --
 policy/modules/system/init.te      | 3 ---
 policy/modules/system/logging.if   | 2 ++
 policy/modules/system/logging.te   | 4 ----
 policy/modules/system/systemd.te   | 5 -----
 policy/modules/system/udev.te      | 1 -
 10 files changed, 2 insertions(+), 29 deletions(-)

diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
index 30deba09..f5e64a86 100644
--- a/policy/modules/admin/aide.te
+++ b/policy/modules/admin/aide.te
@@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
 files_read_all_files(aide_t)
 files_read_all_symlinks(aide_t)
 
-kernel_dgram_send(aide_t)
 kernel_read_crypto_sysctls(aide_t)
 
 logging_send_audit_msgs(aide_t)
diff --git a/policy/modules/admin/usermanage.te b/policy/modules/admin/usermanage.te
index 5753741b..4a10bf84 100644
--- a/policy/modules/admin/usermanage.te
+++ b/policy/modules/admin/usermanage.te
@@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
 # on user home dir
 userdom_dontaudit_search_user_home_content(passwd_t)
 
-ifdef(`init_systemd',`
-	# for journald /dev/log
-	kernel_dgram_send(passwd_t)
-')
-
 optional_policy(`
 	nscd_run(passwd_t, passwd_roles)
 ')
diff --git a/policy/modules/services/dbus.te b/policy/modules/services/dbus.te
index 9c085876..c05370dd 100644
--- a/policy/modules/services/dbus.te
+++ b/policy/modules/services/dbus.te
@@ -162,9 +162,6 @@ ifdef(`init_systemd', `
 	# for /run/systemd/dynamic-uid/
 	init_list_pids(system_dbusd_t)
 	init_read_runtime_symlinks(system_dbusd_t)
-
-	# for journald /dev/log
-	kernel_dgram_send(system_dbusd_t)
 ')
 
 optional_policy(`
diff --git a/policy/modules/system/authlogin.te b/policy/modules/system/authlogin.te
index 28f74bac..2cf86952 100644
--- a/policy/modules/system/authlogin.te
+++ b/policy/modules/system/authlogin.te
@@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
 	')
 ')
 
-ifdef(`init_systemd',`
-	# for journald /dev/log
-	kernel_dgram_send(chkpwd_t)
-')
-
 optional_policy(`
 	# apache leaks file descriptors
 	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
diff --git a/policy/modules/system/init.if b/policy/modules/system/init.if
index fef2c88e..00bd4991 100644
--- a/policy/modules/system/init.if
+++ b/policy/modules/system/init.if
@@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
 
 	ifdef(`init_systemd',`
 		init_domain($1, $2)
-		# this may be because of late labelling
-		kernel_dgram_send($1)
 
 		allow $1 init_t:unix_dgram_socket sendto;
 	')
diff --git a/policy/modules/system/init.te b/policy/modules/system/init.te
index a12d151b..3e8eb2da 100644
--- a/policy/modules/system/init.te
+++ b/policy/modules/system/init.te
@@ -272,7 +272,6 @@ ifdef(`init_systemd',`
 
 	kernel_dyntrans_to(init_t)
 	kernel_read_network_state(init_t)
-	kernel_dgram_send(init_t)
 	kernel_stream_connect(init_t)
 	kernel_getattr_proc(init_t)
 	kernel_read_fs_sysctls(init_t)
@@ -969,8 +968,6 @@ ifdef(`init_systemd',`
 	allow initrc_t systemdunit:service reload;
 	allow initrc_t init_script_file_type:service { stop start status reload };
 
-	kernel_dgram_send(initrc_t)
-
 	# run systemd misc initializations
 	# in the initrc_t domain, as would be
 	# done in traditional sysvinit/upstart.
diff --git a/policy/modules/system/logging.if b/policy/modules/system/logging.if
index 7b7644f7..1f696b7f 100644
--- a/policy/modules/system/logging.if
+++ b/policy/modules/system/logging.if
@@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
 	ifdef(`init_systemd',`
 		# Allow systemd-journald to check whether the process died
 		allow syslogd_t $1:process signull;
+
+		kernel_dgram_send($1)
 	')
 ')
 
diff --git a/policy/modules/system/logging.te b/policy/modules/system/logging.te
index 0c5be1cd..02f268ea 100644
--- a/policy/modules/system/logging.te
+++ b/policy/modules/system/logging.te
@@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
 
 sysnet_dns_name_resolve(audisp_t)
 
-ifdef(`init_systemd',`
-	kernel_dgram_send(audisp_t)
-')
-
 optional_policy(`
 	dbus_system_bus_client(audisp_t)
 ')
diff --git a/policy/modules/system/systemd.te b/policy/modules/system/systemd.te
index f6455f6f..cf9241c0 100644
--- a/policy/modules/system/systemd.te
+++ b/policy/modules/system/systemd.te
@@ -266,7 +266,6 @@ systemd_log_parse_environment(systemd_gpt_generator_t)
 allow systemd_cgroups_t self:capability net_admin;
 
 kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
-kernel_dgram_send(systemd_cgroups_t)
 # for /proc/cmdline
 kernel_read_system_state(systemd_cgroups_t)
 
@@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_netw
 manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_networkd_var_run_t)
 manage_lnk_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_networkd_var_run_t)
 
-kernel_dgram_send(systemd_networkd_t)
 kernel_read_system_state(systemd_networkd_t)
 kernel_read_kernel_sysctls(systemd_networkd_t)
 kernel_read_network_state(systemd_networkd_t)
@@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
 init_dgram_send(systemd_networkd_t)
 init_read_state(systemd_networkd_t)
 
-logging_send_syslog_msg(systemd_networkd_t)
-
 miscfiles_read_localization(systemd_networkd_t)
 
 sysnet_read_config(systemd_networkd_t)
@@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t, systemd_resolved_var_run_t, dir)
 
 dev_read_sysfs(systemd_resolved_t)
 
-kernel_dgram_send(systemd_resolved_t)
 kernel_read_crypto_sysctls(systemd_resolved_t)
 kernel_read_kernel_sysctls(systemd_resolved_t)
 kernel_read_net_sysctls(systemd_resolved_t)
diff --git a/policy/modules/system/udev.te b/policy/modules/system/udev.te
index ff564280..f00de30d 100644
--- a/policy/modules/system/udev.te
+++ b/policy/modules/system/udev.te
@@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
 kernel_read_kernel_sysctls(udev_t)
 kernel_rw_hotplug_sysctls(udev_t)
 kernel_rw_unix_dgram_sockets(udev_t)
-kernel_dgram_send(udev_t)
 kernel_signal(udev_t)
 kernel_search_debugfs(udev_t)
 kernel_search_key(udev_t)
-- 
2.20.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-09 15:09 [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg() Sugar, David
@ 2019-04-10  1:00 ` Russell Coker
  2019-04-10  1:07   ` Sugar, David
  0 siblings, 1 reply; 9+ messages in thread
From: Russell Coker @ 2019-04-10  1:00 UTC (permalink / raw)
  To: Sugar, David; +Cc: selinux-refpolicy

Why does the kernel need such access?

On Wednesday, 10 April 2019 1:09:59 AM AEST Sugar, David wrote:
> This patch is based on comments from previous a patch to
> remove the many uses of kernel_dgram_send() and incorporate
> it into logging_send_syslog_msg().
> 
> Signed-off-by: Dave Sugar <dsugar@tresys.com>
> ---
>  policy/modules/admin/aide.te       | 1 -
>  policy/modules/admin/usermanage.te | 5 -----
>  policy/modules/services/dbus.te    | 3 ---
>  policy/modules/system/authlogin.te | 5 -----
>  policy/modules/system/init.if      | 2 --
>  policy/modules/system/init.te      | 3 ---
>  policy/modules/system/logging.if   | 2 ++
>  policy/modules/system/logging.te   | 4 ----
>  policy/modules/system/systemd.te   | 5 -----
>  policy/modules/system/udev.te      | 1 -
>  10 files changed, 2 insertions(+), 29 deletions(-)
> 
> diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
> index 30deba09..f5e64a86 100644
> --- a/policy/modules/admin/aide.te
> +++ b/policy/modules/admin/aide.te
> @@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
>  files_read_all_files(aide_t)
>  files_read_all_symlinks(aide_t)
>  
> -kernel_dgram_send(aide_t)
>  kernel_read_crypto_sysctls(aide_t)
>  
>  logging_send_audit_msgs(aide_t)
> diff --git a/policy/modules/admin/usermanage.te
> b/policy/modules/admin/usermanage.te
 index 5753741b..4a10bf84 100644
> --- a/policy/modules/admin/usermanage.te
> +++ b/policy/modules/admin/usermanage.te
> @@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
>  # on user home dir
>  userdom_dontaudit_search_user_home_content(passwd_t)
>  
> -ifdef(`init_systemd',`
> -	# for journald /dev/log
> -	kernel_dgram_send(passwd_t)
> -')
> -
>  optional_policy(`
>  	nscd_run(passwd_t, passwd_roles)
>  ')
> diff --git a/policy/modules/services/dbus.te
> b/policy/modules/services/dbus.te
 index 9c085876..c05370dd 100644
> --- a/policy/modules/services/dbus.te
> +++ b/policy/modules/services/dbus.te
> @@ -162,9 +162,6 @@ ifdef(`init_systemd', `
>  	# for /run/systemd/dynamic-uid/
>  	init_list_pids(system_dbusd_t)
>  	init_read_runtime_symlinks(system_dbusd_t)
> -
> -	# for journald /dev/log
> -	kernel_dgram_send(system_dbusd_t)
>  ')
>  
>  optional_policy(`
> diff --git a/policy/modules/system/authlogin.te
> b/policy/modules/system/authlogin.te
 index 28f74bac..2cf86952 100644
> --- a/policy/modules/system/authlogin.te
> +++ b/policy/modules/system/authlogin.te
> @@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
>  	')
>  ')
>  
> -ifdef(`init_systemd',`
> -	# for journald /dev/log
> -	kernel_dgram_send(chkpwd_t)
> -')
> -
>  optional_policy(`
>  	# apache leaks file descriptors
>  	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
> diff --git a/policy/modules/system/init.if b/policy/modules/system/init.if
> index fef2c88e..00bd4991 100644
> --- a/policy/modules/system/init.if
> +++ b/policy/modules/system/init.if
> @@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
>  
>  	ifdef(`init_systemd',`
>  		init_domain($1, $2)
> -		# this may be because of late labelling
> -		kernel_dgram_send($1)
>  
>  		allow $1 init_t:unix_dgram_socket sendto;
>  	')
> diff --git a/policy/modules/system/init.te b/policy/modules/system/init.te
> index a12d151b..3e8eb2da 100644
> --- a/policy/modules/system/init.te
> +++ b/policy/modules/system/init.te
> @@ -272,7 +272,6 @@ ifdef(`init_systemd',`
>  
>  	kernel_dyntrans_to(init_t)
>  	kernel_read_network_state(init_t)
> -	kernel_dgram_send(init_t)
>  	kernel_stream_connect(init_t)
>  	kernel_getattr_proc(init_t)
>  	kernel_read_fs_sysctls(init_t)
> @@ -969,8 +968,6 @@ ifdef(`init_systemd',`
>  	allow initrc_t systemdunit:service reload;
>  	allow initrc_t init_script_file_type:service { stop start status reload
> };
 
> -	kernel_dgram_send(initrc_t)
> -
>  	# run systemd misc initializations
>  	# in the initrc_t domain, as would be
>  	# done in traditional sysvinit/upstart.
> diff --git a/policy/modules/system/logging.if
> b/policy/modules/system/logging.if
 index 7b7644f7..1f696b7f 100644
> --- a/policy/modules/system/logging.if
> +++ b/policy/modules/system/logging.if
> @@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
>  	ifdef(`init_systemd',`
>  		# Allow systemd-journald to check whether the process died
>  		allow syslogd_t $1:process signull;
> +
> +		kernel_dgram_send($1)
>  	')
>  ')
>  
> diff --git a/policy/modules/system/logging.te
> b/policy/modules/system/logging.te
 index 0c5be1cd..02f268ea 100644
> --- a/policy/modules/system/logging.te
> +++ b/policy/modules/system/logging.te
> @@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
>  
>  sysnet_dns_name_resolve(audisp_t)
>  
> -ifdef(`init_systemd',`
> -	kernel_dgram_send(audisp_t)
> -')
> -
>  optional_policy(`
>  	dbus_system_bus_client(audisp_t)
>  ')
> diff --git a/policy/modules/system/systemd.te
> b/policy/modules/system/systemd.te
 index f6455f6f..cf9241c0 100644
> --- a/policy/modules/system/systemd.te
> +++ b/policy/modules/system/systemd.te
> @@ -266,7 +266,6 @@ systemd_log_parse_environment(systemd_gpt_generator_t)
>  allow systemd_cgroups_t self:capability net_admin;
>  
>  kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
> -kernel_dgram_send(systemd_cgroups_t)
>  # for /proc/cmdline
>  kernel_read_system_state(systemd_cgroups_t)
>  
> @@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t,
> systemd_networkd_var_run_t, systemd_netw
> manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t,
> systemd_networkd_var_run_t) manage_lnk_files_pattern(systemd_networkd_t,
> systemd_networkd_var_run_t, systemd_networkd_var_run_t) 
> -kernel_dgram_send(systemd_networkd_t)
>  kernel_read_system_state(systemd_networkd_t)
>  kernel_read_kernel_sysctls(systemd_networkd_t)
>  kernel_read_network_state(systemd_networkd_t)
> @@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
>  init_dgram_send(systemd_networkd_t)
>  init_read_state(systemd_networkd_t)
>  
> -logging_send_syslog_msg(systemd_networkd_t)
> -
>  miscfiles_read_localization(systemd_networkd_t)
>  
>  sysnet_read_config(systemd_networkd_t)
> @@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t,
> systemd_resolved_var_run_t, dir)
 
>  dev_read_sysfs(systemd_resolved_t)
>  
> -kernel_dgram_send(systemd_resolved_t)
>  kernel_read_crypto_sysctls(systemd_resolved_t)
>  kernel_read_kernel_sysctls(systemd_resolved_t)
>  kernel_read_net_sysctls(systemd_resolved_t)
> diff --git a/policy/modules/system/udev.te b/policy/modules/system/udev.te
> index ff564280..f00de30d 100644
> --- a/policy/modules/system/udev.te
> +++ b/policy/modules/system/udev.te
> @@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
>  kernel_read_kernel_sysctls(udev_t)
>  kernel_rw_hotplug_sysctls(udev_t)
>  kernel_rw_unix_dgram_sockets(udev_t)
> -kernel_dgram_send(udev_t)
>  kernel_signal(udev_t)
>  kernel_search_debugfs(udev_t)
>  kernel_search_key(udev_t)
> -- 
> 2.20.1
> 

-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/




^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-10  1:00 ` Russell Coker
@ 2019-04-10  1:07   ` Sugar, David
  2019-04-10  1:39     ` Russell Coker
  0 siblings, 1 reply; 9+ messages in thread
From: Sugar, David @ 2019-04-10  1:07 UTC (permalink / raw)
  To: Russell Coker; +Cc: selinux-refpolicy



On 4/9/19 9:00 PM, Russell Coker wrote:
> Why does the kernel need such access?

I'm not sure I understand your question.  Are you asking why the 
kernel_dgram_send() access is needed by syslog?  This is because many 
domains send messages to the journal.

I have been adding this interface as needed throughout the policy as I'm 
seeing issues.  It was suggested to move this interface use into 
logging_send_syslog_msg as that is the same concept and most domains log 
already.

This patch is mostly removing uses of kernel_dgram_send and just adding 
it one place.

> 
> On Wednesday, 10 April 2019 1:09:59 AM AEST Sugar, David wrote:
>> This patch is based on comments from previous a patch to
>> remove the many uses of kernel_dgram_send() and incorporate
>> it into logging_send_syslog_msg().
>>
>> Signed-off-by: Dave Sugar <dsugar@tresys.com>
>> ---
>>   policy/modules/admin/aide.te       | 1 -
>>   policy/modules/admin/usermanage.te | 5 -----
>>   policy/modules/services/dbus.te    | 3 ---
>>   policy/modules/system/authlogin.te | 5 -----
>>   policy/modules/system/init.if      | 2 --
>>   policy/modules/system/init.te      | 3 ---
>>   policy/modules/system/logging.if   | 2 ++
>>   policy/modules/system/logging.te   | 4 ----
>>   policy/modules/system/systemd.te   | 5 -----
>>   policy/modules/system/udev.te      | 1 -
>>   10 files changed, 2 insertions(+), 29 deletions(-)
>>
>> diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
>> index 30deba09..f5e64a86 100644
>> --- a/policy/modules/admin/aide.te
>> +++ b/policy/modules/admin/aide.te
>> @@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
>>   files_read_all_files(aide_t)
>>   files_read_all_symlinks(aide_t)
>>   
>> -kernel_dgram_send(aide_t)
>>   kernel_read_crypto_sysctls(aide_t)
>>   
>>   logging_send_audit_msgs(aide_t)
>> diff --git a/policy/modules/admin/usermanage.te
>> b/policy/modules/admin/usermanage.te
>   index 5753741b..4a10bf84 100644
>> --- a/policy/modules/admin/usermanage.te
>> +++ b/policy/modules/admin/usermanage.te
>> @@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
>>   # on user home dir
>>   userdom_dontaudit_search_user_home_content(passwd_t)
>>   
>> -ifdef(`init_systemd',`
>> -	# for journald /dev/log
>> -	kernel_dgram_send(passwd_t)
>> -')
>> -
>>   optional_policy(`
>>   	nscd_run(passwd_t, passwd_roles)
>>   ')
>> diff --git a/policy/modules/services/dbus.te
>> b/policy/modules/services/dbus.te
>   index 9c085876..c05370dd 100644
>> --- a/policy/modules/services/dbus.te
>> +++ b/policy/modules/services/dbus.te
>> @@ -162,9 +162,6 @@ ifdef(`init_systemd', `
>>   	# for /run/systemd/dynamic-uid/
>>   	init_list_pids(system_dbusd_t)
>>   	init_read_runtime_symlinks(system_dbusd_t)
>> -
>> -	# for journald /dev/log
>> -	kernel_dgram_send(system_dbusd_t)
>>   ')
>>   
>>   optional_policy(`
>> diff --git a/policy/modules/system/authlogin.te
>> b/policy/modules/system/authlogin.te
>   index 28f74bac..2cf86952 100644
>> --- a/policy/modules/system/authlogin.te
>> +++ b/policy/modules/system/authlogin.te
>> @@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
>>   	')
>>   ')
>>   
>> -ifdef(`init_systemd',`
>> -	# for journald /dev/log
>> -	kernel_dgram_send(chkpwd_t)
>> -')
>> -
>>   optional_policy(`
>>   	# apache leaks file descriptors
>>   	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
>> diff --git a/policy/modules/system/init.if b/policy/modules/system/init.if
>> index fef2c88e..00bd4991 100644
>> --- a/policy/modules/system/init.if
>> +++ b/policy/modules/system/init.if
>> @@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
>>   
>>   	ifdef(`init_systemd',`
>>   		init_domain($1, $2)
>> -		# this may be because of late labelling
>> -		kernel_dgram_send($1)
>>   
>>   		allow $1 init_t:unix_dgram_socket sendto;
>>   	')
>> diff --git a/policy/modules/system/init.te b/policy/modules/system/init.te
>> index a12d151b..3e8eb2da 100644
>> --- a/policy/modules/system/init.te
>> +++ b/policy/modules/system/init.te
>> @@ -272,7 +272,6 @@ ifdef(`init_systemd',`
>>   
>>   	kernel_dyntrans_to(init_t)
>>   	kernel_read_network_state(init_t)
>> -	kernel_dgram_send(init_t)
>>   	kernel_stream_connect(init_t)
>>   	kernel_getattr_proc(init_t)
>>   	kernel_read_fs_sysctls(init_t)
>> @@ -969,8 +968,6 @@ ifdef(`init_systemd',`
>>   	allow initrc_t systemdunit:service reload;
>>   	allow initrc_t init_script_file_type:service { stop start status reload
>> };
>   
>> -	kernel_dgram_send(initrc_t)
>> -
>>   	# run systemd misc initializations
>>   	# in the initrc_t domain, as would be
>>   	# done in traditional sysvinit/upstart.
>> diff --git a/policy/modules/system/logging.if
>> b/policy/modules/system/logging.if
>   index 7b7644f7..1f696b7f 100644
>> --- a/policy/modules/system/logging.if
>> +++ b/policy/modules/system/logging.if
>> @@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
>>   	ifdef(`init_systemd',`
>>   		# Allow systemd-journald to check whether the process died
>>   		allow syslogd_t $1:process signull;
>> +
>> +		kernel_dgram_send($1)
>>   	')
>>   ')
>>   
>> diff --git a/policy/modules/system/logging.te
>> b/policy/modules/system/logging.te
>   index 0c5be1cd..02f268ea 100644
>> --- a/policy/modules/system/logging.te
>> +++ b/policy/modules/system/logging.te
>> @@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
>>   
>>   sysnet_dns_name_resolve(audisp_t)
>>   
>> -ifdef(`init_systemd',`
>> -	kernel_dgram_send(audisp_t)
>> -')
>> -
>>   optional_policy(`
>>   	dbus_system_bus_client(audisp_t)
>>   ')
>> diff --git a/policy/modules/system/systemd.te
>> b/policy/modules/system/systemd.te
>   index f6455f6f..cf9241c0 100644
>> --- a/policy/modules/system/systemd.te
>> +++ b/policy/modules/system/systemd.te
>> @@ -266,7 +266,6 @@ systemd_log_parse_environment(systemd_gpt_generator_t)
>>   allow systemd_cgroups_t self:capability net_admin;
>>   
>>   kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
>> -kernel_dgram_send(systemd_cgroups_t)
>>   # for /proc/cmdline
>>   kernel_read_system_state(systemd_cgroups_t)
>>   
>> @@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t,
>> systemd_networkd_var_run_t, systemd_netw
>> manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t,
>> systemd_networkd_var_run_t) manage_lnk_files_pattern(systemd_networkd_t,
>> systemd_networkd_var_run_t, systemd_networkd_var_run_t)
>> -kernel_dgram_send(systemd_networkd_t)
>>   kernel_read_system_state(systemd_networkd_t)
>>   kernel_read_kernel_sysctls(systemd_networkd_t)
>>   kernel_read_network_state(systemd_networkd_t)
>> @@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
>>   init_dgram_send(systemd_networkd_t)
>>   init_read_state(systemd_networkd_t)
>>   
>> -logging_send_syslog_msg(systemd_networkd_t)
>> -
>>   miscfiles_read_localization(systemd_networkd_t)
>>   
>>   sysnet_read_config(systemd_networkd_t)
>> @@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t,
>> systemd_resolved_var_run_t, dir)
>   
>>   dev_read_sysfs(systemd_resolved_t)
>>   
>> -kernel_dgram_send(systemd_resolved_t)
>>   kernel_read_crypto_sysctls(systemd_resolved_t)
>>   kernel_read_kernel_sysctls(systemd_resolved_t)
>>   kernel_read_net_sysctls(systemd_resolved_t)
>> diff --git a/policy/modules/system/udev.te b/policy/modules/system/udev.te
>> index ff564280..f00de30d 100644
>> --- a/policy/modules/system/udev.te
>> +++ b/policy/modules/system/udev.te
>> @@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
>>   kernel_read_kernel_sysctls(udev_t)
>>   kernel_rw_hotplug_sysctls(udev_t)
>>   kernel_rw_unix_dgram_sockets(udev_t)
>> -kernel_dgram_send(udev_t)
>>   kernel_signal(udev_t)
>>   kernel_search_debugfs(udev_t)
>>   kernel_search_key(udev_t)
>> -- 
>> 2.20.1
>>
> 

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-10  1:07   ` Sugar, David
@ 2019-04-10  1:39     ` Russell Coker
  2019-04-10 14:16       ` Sugar, David
  2019-04-12 11:54       ` Chris PeBenito
  0 siblings, 2 replies; 9+ messages in thread
From: Russell Coker @ 2019-04-10  1:39 UTC (permalink / raw)
  To: Sugar, David; +Cc: selinux-refpolicy

Why is a socket that everything sends to labeled as kernel_t?

On Wednesday, 10 April 2019 11:07:29 AM AEST Sugar, David wrote:
> On 4/9/19 9:00 PM, Russell Coker wrote:
> 
> > Why does the kernel need such access?
> 
> 
> I'm not sure I understand your question.  Are you asking why the 
> kernel_dgram_send() access is needed by syslog?  This is because many 
> domains send messages to the journal.
> 
> I have been adding this interface as needed throughout the policy as I'm 
> seeing issues.  It was suggested to move this interface use into 
> logging_send_syslog_msg as that is the same concept and most domains log 
> already.
> 
> This patch is mostly removing uses of kernel_dgram_send and just adding 
> it one place.
> 
> 
> > 
> > On Wednesday, 10 April 2019 1:09:59 AM AEST Sugar, David wrote:
> > 
> >> This patch is based on comments from previous a patch to
> >> remove the many uses of kernel_dgram_send() and incorporate
> >> it into logging_send_syslog_msg().
> >>
> >>
> >>
> >> Signed-off-by: Dave Sugar <dsugar@tresys.com>
> >> ---
> >> 
> >>   policy/modules/admin/aide.te       | 1 -
> >>   policy/modules/admin/usermanage.te | 5 -----
> >>   policy/modules/services/dbus.te    | 3 ---
> >>   policy/modules/system/authlogin.te | 5 -----
> >>   policy/modules/system/init.if      | 2 --
> >>   policy/modules/system/init.te      | 3 ---
> >>   policy/modules/system/logging.if   | 2 ++
> >>   policy/modules/system/logging.te   | 4 ----
> >>   policy/modules/system/systemd.te   | 5 -----
> >>   policy/modules/system/udev.te      | 1 -
> >>   10 files changed, 2 insertions(+), 29 deletions(-)
> >>
> >>
> >>
> >> diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
> >> index 30deba09..f5e64a86 100644
> >> --- a/policy/modules/admin/aide.te
> >> +++ b/policy/modules/admin/aide.te
> >> @@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
> >> 
> >>   files_read_all_files(aide_t)
> >>   files_read_all_symlinks(aide_t)
> >>   
> >> 
> >> -kernel_dgram_send(aide_t)
> >> 
> >>   kernel_read_crypto_sysctls(aide_t)
> >>   
> >>   logging_send_audit_msgs(aide_t)
> >> 
> >> diff --git a/policy/modules/admin/usermanage.te
> >> b/policy/modules/admin/usermanage.te
> >> 
> >   index 5753741b..4a10bf84 100644
> >> 
> >> --- a/policy/modules/admin/usermanage.te
> >> +++ b/policy/modules/admin/usermanage.te
> >> @@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
> >> 
> >>   # on user home dir
> >>   userdom_dontaudit_search_user_home_content(passwd_t)
> >>   
> >> 
> >> -ifdef(`init_systemd',`
> >> -	# for journald /dev/log
> >> -	kernel_dgram_send(passwd_t)
> >> -')
> >> -
> >> 
> >>   optional_policy(`
> >>   
> >>   	nscd_run(passwd_t, passwd_roles)
> >>   
> >>   ')
> >> 
> >> diff --git a/policy/modules/services/dbus.te
> >> b/policy/modules/services/dbus.te
> >> 
> >   index 9c085876..c05370dd 100644
> >> 
> >> --- a/policy/modules/services/dbus.te
> >> +++ b/policy/modules/services/dbus.te
> >> @@ -162,9 +162,6 @@ ifdef(`init_systemd', `
> >> 
> >>   	# for /run/systemd/dynamic-uid/
> >>   	init_list_pids(system_dbusd_t)
> >>   	init_read_runtime_symlinks(system_dbusd_t)
> >> 
> >> -
> >> -	# for journald /dev/log
> >> -	kernel_dgram_send(system_dbusd_t)
> >> 
> >>   ')
> >>   
> >>   optional_policy(`
> >> 
> >> diff --git a/policy/modules/system/authlogin.te
> >> b/policy/modules/system/authlogin.te
> >> 
> >   index 28f74bac..2cf86952 100644
> >> 
> >> --- a/policy/modules/system/authlogin.te
> >> +++ b/policy/modules/system/authlogin.te
> >> @@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
> >> 
> >>   	')
> >>   
> >>   ')
> >>   
> >> 
> >> -ifdef(`init_systemd',`
> >> -	# for journald /dev/log
> >> -	kernel_dgram_send(chkpwd_t)
> >> -')
> >> -
> >> 
> >>   optional_policy(`
> >>   
> >>   	# apache leaks file descriptors
> >>   	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
> >> 
> >> diff --git a/policy/modules/system/init.if
> >> b/policy/modules/system/init.if
> >> index fef2c88e..00bd4991 100644
> >> --- a/policy/modules/system/init.if
> >> +++ b/policy/modules/system/init.if
> >> @@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
> >> 
> >>   
> >>   
> >>   	ifdef(`init_systemd',`
> >>   	
> >>   		init_domain($1, $2)
> >> 
> >> -		# this may be because of late labelling
> >> -		kernel_dgram_send($1)
> >> 
> >>   
> >>   
> >>   		allow $1 init_t:unix_dgram_socket sendto;
> >>   	
> >>   	')
> >> 
> >> diff --git a/policy/modules/system/init.te
> >> b/policy/modules/system/init.te
> >> index a12d151b..3e8eb2da 100644
> >> --- a/policy/modules/system/init.te
> >> +++ b/policy/modules/system/init.te
> >> @@ -272,7 +272,6 @@ ifdef(`init_systemd',`
> >> 
> >>   
> >>   
> >>   	kernel_dyntrans_to(init_t)
> >>   	kernel_read_network_state(init_t)
> >> 
> >> -	kernel_dgram_send(init_t)
> >> 
> >>   	kernel_stream_connect(init_t)
> >>   	kernel_getattr_proc(init_t)
> >>   	kernel_read_fs_sysctls(init_t)
> >> 
> >> @@ -969,8 +968,6 @@ ifdef(`init_systemd',`
> >> 
> >>   	allow initrc_t systemdunit:service reload;
> >>   	allow initrc_t init_script_file_type:service { stop start status
> >>   	reload
> >> 
> >> };
> >> 
> >   
> >> 
> >> -	kernel_dgram_send(initrc_t)
> >> -
> >> 
> >>   	# run systemd misc initializations
> >>   	# in the initrc_t domain, as would be
> >>   	# done in traditional sysvinit/upstart.
> >> 
> >> diff --git a/policy/modules/system/logging.if
> >> b/policy/modules/system/logging.if
> >> 
> >   index 7b7644f7..1f696b7f 100644
> >> 
> >> --- a/policy/modules/system/logging.if
> >> +++ b/policy/modules/system/logging.if
> >> @@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
> >> 
> >>   	ifdef(`init_systemd',`
> >>   	
> >>   		# Allow systemd-journald to check whether the process died
> >>   		allow syslogd_t $1:process signull;
> >> 
> >> +
> >> +		kernel_dgram_send($1)
> >> 
> >>   	')
> >>   
> >>   ')
> >>   
> >> 
> >> diff --git a/policy/modules/system/logging.te
> >> b/policy/modules/system/logging.te
> >> 
> >   index 0c5be1cd..02f268ea 100644
> >> 
> >> --- a/policy/modules/system/logging.te
> >> +++ b/policy/modules/system/logging.te
> >> @@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
> >> 
> >>   
> >>   sysnet_dns_name_resolve(audisp_t)
> >>   
> >> 
> >> -ifdef(`init_systemd',`
> >> -	kernel_dgram_send(audisp_t)
> >> -')
> >> -
> >> 
> >>   optional_policy(`
> >>   
> >>   	dbus_system_bus_client(audisp_t)
> >>   
> >>   ')
> >> 
> >> diff --git a/policy/modules/system/systemd.te
> >> b/policy/modules/system/systemd.te
> >> 
> >   index f6455f6f..cf9241c0 100644
> >> 
> >> --- a/policy/modules/system/systemd.te
> >> +++ b/policy/modules/system/systemd.te
> >> @@ -266,7 +266,6 @@
> >> systemd_log_parse_environment(systemd_gpt_generator_t)
> >> 
> >>   allow systemd_cgroups_t self:capability net_admin;
> >>   
> >>   kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
> >> 
> >> -kernel_dgram_send(systemd_cgroups_t)
> >> 
> >>   # for /proc/cmdline
> >>   kernel_read_system_state(systemd_cgroups_t)
> >>   
> >> 
> >> @@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t,
> >> systemd_networkd_var_run_t, systemd_netw
> >> manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t,
> >> systemd_networkd_var_run_t) manage_lnk_files_pattern(systemd_networkd_t,
> >> systemd_networkd_var_run_t, systemd_networkd_var_run_t)
> >> -kernel_dgram_send(systemd_networkd_t)
> >> 
> >>   kernel_read_system_state(systemd_networkd_t)
> >>   kernel_read_kernel_sysctls(systemd_networkd_t)
> >>   kernel_read_network_state(systemd_networkd_t)
> >> 
> >> @@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
> >> 
> >>   init_dgram_send(systemd_networkd_t)
> >>   init_read_state(systemd_networkd_t)
> >>   
> >> 
> >> -logging_send_syslog_msg(systemd_networkd_t)
> >> -
> >> 
> >>   miscfiles_read_localization(systemd_networkd_t)
> >>   
> >>   sysnet_read_config(systemd_networkd_t)
> >> 
> >> @@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t,
> >> systemd_resolved_var_run_t, dir)
> >> 
> >   
> >   
> >>   dev_read_sysfs(systemd_resolved_t)
> >>   
> >> 
> >> -kernel_dgram_send(systemd_resolved_t)
> >> 
> >>   kernel_read_crypto_sysctls(systemd_resolved_t)
> >>   kernel_read_kernel_sysctls(systemd_resolved_t)
> >>   kernel_read_net_sysctls(systemd_resolved_t)
> >> 
> >> diff --git a/policy/modules/system/udev.te
> >> b/policy/modules/system/udev.te
> >> index ff564280..f00de30d 100644
> >> --- a/policy/modules/system/udev.te
> >> +++ b/policy/modules/system/udev.te
> >> @@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
> >> 
> >>   kernel_read_kernel_sysctls(udev_t)
> >>   kernel_rw_hotplug_sysctls(udev_t)
> >>   kernel_rw_unix_dgram_sockets(udev_t)
> >> 
> >> -kernel_dgram_send(udev_t)
> >> 
> >>   kernel_signal(udev_t)
> >>   kernel_search_debugfs(udev_t)
> >>   kernel_search_key(udev_t)
> >> 
> >> -- 
> >> 2.20.1
> >>
> >>
> >>
> > 


-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/




^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-10  1:39     ` Russell Coker
@ 2019-04-10 14:16       ` Sugar, David
  2019-04-12 11:54       ` Chris PeBenito
  1 sibling, 0 replies; 9+ messages in thread
From: Sugar, David @ 2019-04-10 14:16 UTC (permalink / raw)
  To: Russell Coker; +Cc: selinux-refpolicy



On 4/9/19 9:39 PM, Russell Coker wrote:
> Why is a socket that everything sends to labeled as kernel_t?
> 

I see, it is happening during the system booting.  /dev/log and 
/run/systemd/journal/socket are both labeled kernel_t early in the boot 
process.  At some point they are either relabeled or recreated with 
devlog_t.  But without this rule the system won't boot (I have tried).

Here are a small sample of the denials I get without these rules.

type=AVC msg=audit(1554904080.089:5018): avc:  denied  { sendto } for 
pid=7559 comm="auditd" path="/dev/log" 
scontext=system_u:system_r:auditd_t:s0 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=0

type=AVC msg=audit(1554904080.155:5138): avc:  denied  { sendto } for 
pid=7590 comm="systemd-cgroups" path="/run/systemd/journal/socket" 
scontext=system_u:system_r:systemd_cgroups_t:s0 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=0

type=AVC msg=audit(1554904080.158:5142): avc:  denied  { sendto } for 
pid=7591 comm="systemd-update-" path="/run/systemd/journal/socket" 
scontext=system_u:system_r:initrc_t:s0 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=0

type=AVC msg=audit(1554904467.831:181): avc:  denied  { sendto } for 
pid=7510 comm="chronyd" path="/dev/log" 
scontext=system_u:system_r:chronyd_t:s0 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=1

type=AVC msg=audit(1554904467.842:190): avc:  denied  { sendto } for 
pid=7498 comm="dbus-daemon" path="/dev/log" 
scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=1

type=AVC msg=audit(1554904467.850:194): avc:  denied  { sendto } for 
pid=7521 comm="systemd-user-se" path="/run/systemd/journal/socket" 
scontext=system_u:system_r:systemd_sessions_t:s0 
tcontext=system_u:system_r:kernel_t:s0 tclass=unix_dgram_socket permissive=1

> On Wednesday, 10 April 2019 11:07:29 AM AEST Sugar, David wrote:
>> On 4/9/19 9:00 PM, Russell Coker wrote:
>>
>>> Why does the kernel need such access?
>>
>>
>> I'm not sure I understand your question.  Are you asking why the
>> kernel_dgram_send() access is needed by syslog?  This is because many
>> domains send messages to the journal.
>>
>> I have been adding this interface as needed throughout the policy as I'm
>> seeing issues.  It was suggested to move this interface use into
>> logging_send_syslog_msg as that is the same concept and most domains log
>> already.
>>
>> This patch is mostly removing uses of kernel_dgram_send and just adding
>> it one place.
>>
>>
>>>
>>> On Wednesday, 10 April 2019 1:09:59 AM AEST Sugar, David wrote:
>>>
>>>> This patch is based on comments from previous a patch to
>>>> remove the many uses of kernel_dgram_send() and incorporate
>>>> it into logging_send_syslog_msg().
>>>>
>>>>
>>>>
>>>> Signed-off-by: Dave Sugar <dsugar@tresys.com>
>>>> ---
>>>>
>>>>    policy/modules/admin/aide.te       | 1 -
>>>>    policy/modules/admin/usermanage.te | 5 -----
>>>>    policy/modules/services/dbus.te    | 3 ---
>>>>    policy/modules/system/authlogin.te | 5 -----
>>>>    policy/modules/system/init.if      | 2 --
>>>>    policy/modules/system/init.te      | 3 ---
>>>>    policy/modules/system/logging.if   | 2 ++
>>>>    policy/modules/system/logging.te   | 4 ----
>>>>    policy/modules/system/systemd.te   | 5 -----
>>>>    policy/modules/system/udev.te      | 1 -
>>>>    10 files changed, 2 insertions(+), 29 deletions(-)
>>>>
>>>>
>>>>
>>>> diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
>>>> index 30deba09..f5e64a86 100644
>>>> --- a/policy/modules/admin/aide.te
>>>> +++ b/policy/modules/admin/aide.te
>>>> @@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
>>>>
>>>>    files_read_all_files(aide_t)
>>>>    files_read_all_symlinks(aide_t)
>>>>    
>>>>
>>>> -kernel_dgram_send(aide_t)
>>>>
>>>>    kernel_read_crypto_sysctls(aide_t)
>>>>    
>>>>    logging_send_audit_msgs(aide_t)
>>>>
>>>> diff --git a/policy/modules/admin/usermanage.te
>>>> b/policy/modules/admin/usermanage.te
>>>>
>>>    index 5753741b..4a10bf84 100644
>>>>
>>>> --- a/policy/modules/admin/usermanage.te
>>>> +++ b/policy/modules/admin/usermanage.te
>>>> @@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
>>>>
>>>>    # on user home dir
>>>>    userdom_dontaudit_search_user_home_content(passwd_t)
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(passwd_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	nscd_run(passwd_t, passwd_roles)
>>>>    
>>>>    ')
>>>>
>>>> diff --git a/policy/modules/services/dbus.te
>>>> b/policy/modules/services/dbus.te
>>>>
>>>    index 9c085876..c05370dd 100644
>>>>
>>>> --- a/policy/modules/services/dbus.te
>>>> +++ b/policy/modules/services/dbus.te
>>>> @@ -162,9 +162,6 @@ ifdef(`init_systemd', `
>>>>
>>>>    	# for /run/systemd/dynamic-uid/
>>>>    	init_list_pids(system_dbusd_t)
>>>>    	init_read_runtime_symlinks(system_dbusd_t)
>>>>
>>>> -
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(system_dbusd_t)
>>>>
>>>>    ')
>>>>    
>>>>    optional_policy(`
>>>>
>>>> diff --git a/policy/modules/system/authlogin.te
>>>> b/policy/modules/system/authlogin.te
>>>>
>>>    index 28f74bac..2cf86952 100644
>>>>
>>>> --- a/policy/modules/system/authlogin.te
>>>> +++ b/policy/modules/system/authlogin.te
>>>> @@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
>>>>
>>>>    	')
>>>>    
>>>>    ')
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(chkpwd_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	# apache leaks file descriptors
>>>>    	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
>>>>
>>>> diff --git a/policy/modules/system/init.if
>>>> b/policy/modules/system/init.if
>>>> index fef2c88e..00bd4991 100644
>>>> --- a/policy/modules/system/init.if
>>>> +++ b/policy/modules/system/init.if
>>>> @@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
>>>>
>>>>    
>>>>    
>>>>    	ifdef(`init_systemd',`
>>>>    	
>>>>    		init_domain($1, $2)
>>>>
>>>> -		# this may be because of late labelling
>>>> -		kernel_dgram_send($1)
>>>>
>>>>    
>>>>    
>>>>    		allow $1 init_t:unix_dgram_socket sendto;
>>>>    	
>>>>    	')
>>>>
>>>> diff --git a/policy/modules/system/init.te
>>>> b/policy/modules/system/init.te
>>>> index a12d151b..3e8eb2da 100644
>>>> --- a/policy/modules/system/init.te
>>>> +++ b/policy/modules/system/init.te
>>>> @@ -272,7 +272,6 @@ ifdef(`init_systemd',`
>>>>
>>>>    
>>>>    
>>>>    	kernel_dyntrans_to(init_t)
>>>>    	kernel_read_network_state(init_t)
>>>>
>>>> -	kernel_dgram_send(init_t)
>>>>
>>>>    	kernel_stream_connect(init_t)
>>>>    	kernel_getattr_proc(init_t)
>>>>    	kernel_read_fs_sysctls(init_t)
>>>>
>>>> @@ -969,8 +968,6 @@ ifdef(`init_systemd',`
>>>>
>>>>    	allow initrc_t systemdunit:service reload;
>>>>    	allow initrc_t init_script_file_type:service { stop start status
>>>>    	reload
>>>>
>>>> };
>>>>
>>>    
>>>>
>>>> -	kernel_dgram_send(initrc_t)
>>>> -
>>>>
>>>>    	# run systemd misc initializations
>>>>    	# in the initrc_t domain, as would be
>>>>    	# done in traditional sysvinit/upstart.
>>>>
>>>> diff --git a/policy/modules/system/logging.if
>>>> b/policy/modules/system/logging.if
>>>>
>>>    index 7b7644f7..1f696b7f 100644
>>>>
>>>> --- a/policy/modules/system/logging.if
>>>> +++ b/policy/modules/system/logging.if
>>>> @@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
>>>>
>>>>    	ifdef(`init_systemd',`
>>>>    	
>>>>    		# Allow systemd-journald to check whether the process died
>>>>    		allow syslogd_t $1:process signull;
>>>>
>>>> +
>>>> +		kernel_dgram_send($1)
>>>>
>>>>    	')
>>>>    
>>>>    ')
>>>>    
>>>>
>>>> diff --git a/policy/modules/system/logging.te
>>>> b/policy/modules/system/logging.te
>>>>
>>>    index 0c5be1cd..02f268ea 100644
>>>>
>>>> --- a/policy/modules/system/logging.te
>>>> +++ b/policy/modules/system/logging.te
>>>> @@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
>>>>
>>>>    
>>>>    sysnet_dns_name_resolve(audisp_t)
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	kernel_dgram_send(audisp_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	dbus_system_bus_client(audisp_t)
>>>>    
>>>>    ')
>>>>
>>>> diff --git a/policy/modules/system/systemd.te
>>>> b/policy/modules/system/systemd.te
>>>>
>>>    index f6455f6f..cf9241c0 100644
>>>>
>>>> --- a/policy/modules/system/systemd.te
>>>> +++ b/policy/modules/system/systemd.te
>>>> @@ -266,7 +266,6 @@
>>>> systemd_log_parse_environment(systemd_gpt_generator_t)
>>>>
>>>>    allow systemd_cgroups_t self:capability net_admin;
>>>>    
>>>>    kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
>>>>
>>>> -kernel_dgram_send(systemd_cgroups_t)
>>>>
>>>>    # for /proc/cmdline
>>>>    kernel_read_system_state(systemd_cgroups_t)
>>>>    
>>>>
>>>> @@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t,
>>>> systemd_networkd_var_run_t, systemd_netw
>>>> manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t,
>>>> systemd_networkd_var_run_t) manage_lnk_files_pattern(systemd_networkd_t,
>>>> systemd_networkd_var_run_t, systemd_networkd_var_run_t)
>>>> -kernel_dgram_send(systemd_networkd_t)
>>>>
>>>>    kernel_read_system_state(systemd_networkd_t)
>>>>    kernel_read_kernel_sysctls(systemd_networkd_t)
>>>>    kernel_read_network_state(systemd_networkd_t)
>>>>
>>>> @@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
>>>>
>>>>    init_dgram_send(systemd_networkd_t)
>>>>    init_read_state(systemd_networkd_t)
>>>>    
>>>>
>>>> -logging_send_syslog_msg(systemd_networkd_t)
>>>> -
>>>>
>>>>    miscfiles_read_localization(systemd_networkd_t)
>>>>    
>>>>    sysnet_read_config(systemd_networkd_t)
>>>>
>>>> @@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t,
>>>> systemd_resolved_var_run_t, dir)
>>>>
>>>    
>>>    
>>>>    dev_read_sysfs(systemd_resolved_t)
>>>>    
>>>>
>>>> -kernel_dgram_send(systemd_resolved_t)
>>>>
>>>>    kernel_read_crypto_sysctls(systemd_resolved_t)
>>>>    kernel_read_kernel_sysctls(systemd_resolved_t)
>>>>    kernel_read_net_sysctls(systemd_resolved_t)
>>>>
>>>> diff --git a/policy/modules/system/udev.te
>>>> b/policy/modules/system/udev.te
>>>> index ff564280..f00de30d 100644
>>>> --- a/policy/modules/system/udev.te
>>>> +++ b/policy/modules/system/udev.te
>>>> @@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
>>>>
>>>>    kernel_read_kernel_sysctls(udev_t)
>>>>    kernel_rw_hotplug_sysctls(udev_t)
>>>>    kernel_rw_unix_dgram_sockets(udev_t)
>>>>
>>>> -kernel_dgram_send(udev_t)
>>>>
>>>>    kernel_signal(udev_t)
>>>>    kernel_search_debugfs(udev_t)
>>>>    kernel_search_key(udev_t)
>>>>
>>>> -- 
>>>> 2.20.1
>>>>
>>>>
>>>>
>>>
> 
> 

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-10  1:39     ` Russell Coker
  2019-04-10 14:16       ` Sugar, David
@ 2019-04-12 11:54       ` Chris PeBenito
  2019-04-13  5:35         ` Russell Coker
  1 sibling, 1 reply; 9+ messages in thread
From: Chris PeBenito @ 2019-04-12 11:54 UTC (permalink / raw)
  To: Russell Coker, Sugar, David; +Cc: selinux-refpolicy

On 4/9/19 9:39 PM, Russell Coker wrote:
> Why is a socket that everything sends to labeled as kernel_t?
> 
> On Wednesday, 10 April 2019 11:07:29 AM AEST Sugar, David wrote:
>> On 4/9/19 9:00 PM, Russell Coker wrote:
>>
>>> Why does the kernel need such access?
>>
>>
>> I'm not sure I understand your question.  Are you asking why the
>> kernel_dgram_send() access is needed by syslog?  This is because many
>> domains send messages to the journal.
>>
>> I have been adding this interface as needed throughout the policy as I'm
>> seeing issues.  It was suggested to move this interface use into
>> logging_send_syslog_msg as that is the same concept and most domains log
>> already.
>>
>> This patch is mostly removing uses of kernel_dgram_send and just adding
>> it one place.
>>
>>
>>>
>>> On Wednesday, 10 April 2019 1:09:59 AM AEST Sugar, David wrote:
>>>
>>>> This patch is based on comments from previous a patch to
>>>> remove the many uses of kernel_dgram_send() and incorporate
>>>> it into logging_send_syslog_msg().


Russell, you aren't seeing this type of access on Debian?

How about Gentoo?  If this is Fedora/RHEL-specific, then it should be 
reflected in the policy accordingly.






>>>> Signed-off-by: Dave Sugar <dsugar@tresys.com>
>>>> ---
>>>>
>>>>    policy/modules/admin/aide.te       | 1 -
>>>>    policy/modules/admin/usermanage.te | 5 -----
>>>>    policy/modules/services/dbus.te    | 3 ---
>>>>    policy/modules/system/authlogin.te | 5 -----
>>>>    policy/modules/system/init.if      | 2 --
>>>>    policy/modules/system/init.te      | 3 ---
>>>>    policy/modules/system/logging.if   | 2 ++
>>>>    policy/modules/system/logging.te   | 4 ----
>>>>    policy/modules/system/systemd.te   | 5 -----
>>>>    policy/modules/system/udev.te      | 1 -
>>>>    10 files changed, 2 insertions(+), 29 deletions(-)
>>>>
>>>>
>>>>
>>>> diff --git a/policy/modules/admin/aide.te b/policy/modules/admin/aide.te
>>>> index 30deba09..f5e64a86 100644
>>>> --- a/policy/modules/admin/aide.te
>>>> +++ b/policy/modules/admin/aide.te
>>>> @@ -44,7 +44,6 @@ logging_log_filetrans(aide_t, aide_log_t, file)
>>>>
>>>>    files_read_all_files(aide_t)
>>>>    files_read_all_symlinks(aide_t)
>>>>    
>>>>
>>>> -kernel_dgram_send(aide_t)
>>>>
>>>>    kernel_read_crypto_sysctls(aide_t)
>>>>    
>>>>    logging_send_audit_msgs(aide_t)
>>>>
>>>> diff --git a/policy/modules/admin/usermanage.te
>>>> b/policy/modules/admin/usermanage.te
>>>>
>>>    index 5753741b..4a10bf84 100644
>>>>
>>>> --- a/policy/modules/admin/usermanage.te
>>>> +++ b/policy/modules/admin/usermanage.te
>>>> @@ -366,11 +366,6 @@ userdom_read_user_tmp_files(passwd_t)
>>>>
>>>>    # on user home dir
>>>>    userdom_dontaudit_search_user_home_content(passwd_t)
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(passwd_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	nscd_run(passwd_t, passwd_roles)
>>>>    
>>>>    ')
>>>>
>>>> diff --git a/policy/modules/services/dbus.te
>>>> b/policy/modules/services/dbus.te
>>>>
>>>    index 9c085876..c05370dd 100644
>>>>
>>>> --- a/policy/modules/services/dbus.te
>>>> +++ b/policy/modules/services/dbus.te
>>>> @@ -162,9 +162,6 @@ ifdef(`init_systemd', `
>>>>
>>>>    	# for /run/systemd/dynamic-uid/
>>>>    	init_list_pids(system_dbusd_t)
>>>>    	init_read_runtime_symlinks(system_dbusd_t)
>>>>
>>>> -
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(system_dbusd_t)
>>>>
>>>>    ')
>>>>    
>>>>    optional_policy(`
>>>>
>>>> diff --git a/policy/modules/system/authlogin.te
>>>> b/policy/modules/system/authlogin.te
>>>>
>>>    index 28f74bac..2cf86952 100644
>>>>
>>>> --- a/policy/modules/system/authlogin.te
>>>> +++ b/policy/modules/system/authlogin.te
>>>> @@ -144,11 +144,6 @@ ifdef(`distro_ubuntu',`
>>>>
>>>>    	')
>>>>    
>>>>    ')
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	# for journald /dev/log
>>>> -	kernel_dgram_send(chkpwd_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	# apache leaks file descriptors
>>>>    	apache_dontaudit_rw_tcp_sockets(chkpwd_t)
>>>>
>>>> diff --git a/policy/modules/system/init.if
>>>> b/policy/modules/system/init.if
>>>> index fef2c88e..00bd4991 100644
>>>> --- a/policy/modules/system/init.if
>>>> +++ b/policy/modules/system/init.if
>>>> @@ -306,8 +306,6 @@ interface(`init_daemon_domain',`
>>>>
>>>>    
>>>>    
>>>>    	ifdef(`init_systemd',`
>>>>    	
>>>>    		init_domain($1, $2)
>>>>
>>>> -		# this may be because of late labelling
>>>> -		kernel_dgram_send($1)
>>>>
>>>>    
>>>>    
>>>>    		allow $1 init_t:unix_dgram_socket sendto;
>>>>    	
>>>>    	')
>>>>
>>>> diff --git a/policy/modules/system/init.te
>>>> b/policy/modules/system/init.te
>>>> index a12d151b..3e8eb2da 100644
>>>> --- a/policy/modules/system/init.te
>>>> +++ b/policy/modules/system/init.te
>>>> @@ -272,7 +272,6 @@ ifdef(`init_systemd',`
>>>>
>>>>    
>>>>    
>>>>    	kernel_dyntrans_to(init_t)
>>>>    	kernel_read_network_state(init_t)
>>>>
>>>> -	kernel_dgram_send(init_t)
>>>>
>>>>    	kernel_stream_connect(init_t)
>>>>    	kernel_getattr_proc(init_t)
>>>>    	kernel_read_fs_sysctls(init_t)
>>>>
>>>> @@ -969,8 +968,6 @@ ifdef(`init_systemd',`
>>>>
>>>>    	allow initrc_t systemdunit:service reload;
>>>>    	allow initrc_t init_script_file_type:service { stop start status
>>>>    	reload
>>>>
>>>> };
>>>>
>>>    
>>>>
>>>> -	kernel_dgram_send(initrc_t)
>>>> -
>>>>
>>>>    	# run systemd misc initializations
>>>>    	# in the initrc_t domain, as would be
>>>>    	# done in traditional sysvinit/upstart.
>>>>
>>>> diff --git a/policy/modules/system/logging.if
>>>> b/policy/modules/system/logging.if
>>>>
>>>    index 7b7644f7..1f696b7f 100644
>>>>
>>>> --- a/policy/modules/system/logging.if
>>>> +++ b/policy/modules/system/logging.if
>>>> @@ -642,6 +642,8 @@ interface(`logging_send_syslog_msg',`
>>>>
>>>>    	ifdef(`init_systemd',`
>>>>    	
>>>>    		# Allow systemd-journald to check whether the process died
>>>>    		allow syslogd_t $1:process signull;
>>>>
>>>> +
>>>> +		kernel_dgram_send($1)
>>>>
>>>>    	')
>>>>    
>>>>    ')
>>>>    
>>>>
>>>> diff --git a/policy/modules/system/logging.te
>>>> b/policy/modules/system/logging.te
>>>>
>>>    index 0c5be1cd..02f268ea 100644
>>>>
>>>> --- a/policy/modules/system/logging.te
>>>> +++ b/policy/modules/system/logging.te
>>>> @@ -271,10 +271,6 @@ miscfiles_read_localization(audisp_t)
>>>>
>>>>    
>>>>    sysnet_dns_name_resolve(audisp_t)
>>>>    
>>>>
>>>> -ifdef(`init_systemd',`
>>>> -	kernel_dgram_send(audisp_t)
>>>> -')
>>>> -
>>>>
>>>>    optional_policy(`
>>>>    
>>>>    	dbus_system_bus_client(audisp_t)
>>>>    
>>>>    ')
>>>>
>>>> diff --git a/policy/modules/system/systemd.te
>>>> b/policy/modules/system/systemd.te
>>>>
>>>    index f6455f6f..cf9241c0 100644
>>>>
>>>> --- a/policy/modules/system/systemd.te
>>>> +++ b/policy/modules/system/systemd.te
>>>> @@ -266,7 +266,6 @@
>>>> systemd_log_parse_environment(systemd_gpt_generator_t)
>>>>
>>>>    allow systemd_cgroups_t self:capability net_admin;
>>>>    
>>>>    kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
>>>>
>>>> -kernel_dgram_send(systemd_cgroups_t)
>>>>
>>>>    # for /proc/cmdline
>>>>    kernel_read_system_state(systemd_cgroups_t)
>>>>    
>>>>
>>>> @@ -642,7 +641,6 @@ manage_dirs_pattern(systemd_networkd_t,
>>>> systemd_networkd_var_run_t, systemd_netw
>>>> manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t,
>>>> systemd_networkd_var_run_t) manage_lnk_files_pattern(systemd_networkd_t,
>>>> systemd_networkd_var_run_t, systemd_networkd_var_run_t)
>>>> -kernel_dgram_send(systemd_networkd_t)
>>>>
>>>>    kernel_read_system_state(systemd_networkd_t)
>>>>    kernel_read_kernel_sysctls(systemd_networkd_t)
>>>>    kernel_read_network_state(systemd_networkd_t)
>>>>
>>>> @@ -667,8 +665,6 @@ auth_use_nsswitch(systemd_networkd_t)
>>>>
>>>>    init_dgram_send(systemd_networkd_t)
>>>>    init_read_state(systemd_networkd_t)
>>>>    
>>>>
>>>> -logging_send_syslog_msg(systemd_networkd_t)
>>>> -
>>>>
>>>>    miscfiles_read_localization(systemd_networkd_t)
>>>>    
>>>>    sysnet_read_config(systemd_networkd_t)
>>>>
>>>> @@ -945,7 +941,6 @@ init_pid_filetrans(systemd_resolved_t,
>>>> systemd_resolved_var_run_t, dir)
>>>>
>>>    
>>>    
>>>>    dev_read_sysfs(systemd_resolved_t)
>>>>    
>>>>
>>>> -kernel_dgram_send(systemd_resolved_t)
>>>>
>>>>    kernel_read_crypto_sysctls(systemd_resolved_t)
>>>>    kernel_read_kernel_sysctls(systemd_resolved_t)
>>>>    kernel_read_net_sysctls(systemd_resolved_t)
>>>>
>>>> diff --git a/policy/modules/system/udev.te
>>>> b/policy/modules/system/udev.te
>>>> index ff564280..f00de30d 100644
>>>> --- a/policy/modules/system/udev.te
>>>> +++ b/policy/modules/system/udev.te
>>>> @@ -99,7 +99,6 @@ kernel_read_modprobe_sysctls(udev_t)
>>>>
>>>>    kernel_read_kernel_sysctls(udev_t)
>>>>    kernel_rw_hotplug_sysctls(udev_t)
>>>>    kernel_rw_unix_dgram_sockets(udev_t)
>>>>
>>>> -kernel_dgram_send(udev_t)
>>>>
>>>>    kernel_signal(udev_t)
>>>>    kernel_search_debugfs(udev_t)
>>>>    kernel_search_key(udev_t)
>>>>
>>>> -- 
>>>> 2.20.1
>>>>
>>>>
>>>>
>>>
> 
> 


-- 
Chris PeBenito

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-12 11:54       ` Chris PeBenito
@ 2019-04-13  5:35         ` Russell Coker
  2019-04-13 15:36           ` Sugar, David
  0 siblings, 1 reply; 9+ messages in thread
From: Russell Coker @ 2019-04-13  5:35 UTC (permalink / raw)
  To: Chris PeBenito; +Cc: Sugar, David, selinux-refpolicy

On Friday, 12 April 2019 9:54:46 PM AEST Chris PeBenito wrote:
> On 4/9/19 9:39 PM, Russell Coker wrote:
> > Why is a socket that everything sends to labeled as kernel_t?
> > 
> 
> Russell, you aren't seeing this type of access on Debian?


        ifdef(`init_systemd',`
                init_domain($1, $2)
                # this may be because of late labelling
                kernel_dgram_send($1)

                allow $1 init_t:unix_dgram_socket sendto;
        ')

The above is in the upstream policy in the init_daemon_domain() interface.  
Not sure why.

I've put in an auditallow rule and so far haven't been able to reproduce it.  
So we can probably remove that line.

-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-13  5:35         ` Russell Coker
@ 2019-04-13 15:36           ` Sugar, David
  2019-04-13 15:40             ` Russell Coker
  0 siblings, 1 reply; 9+ messages in thread
From: Sugar, David @ 2019-04-13 15:36 UTC (permalink / raw)
  To: russell, Chris PeBenito; +Cc: selinux-refpolicy



On 4/13/19 1:35 AM, Russell Coker wrote:
> On Friday, 12 April 2019 9:54:46 PM AEST Chris PeBenito wrote:
>> On 4/9/19 9:39 PM, Russell Coker wrote:
>>> Why is a socket that everything sends to labeled as kernel_t?
>>>
>>
>> Russell, you aren't seeing this type of access on Debian?
> 
> 
>          ifdef(`init_systemd',`
>                  init_domain($1, $2)
>                  # this may be because of late labelling
>                  kernel_dgram_send($1)
> 
>                  allow $1 init_t:unix_dgram_socket sendto;
>          ')
> 
> The above is in the upstream policy in the init_daemon_domain() interface.
> Not sure why.
> 
> I've put in an auditallow rule and so far haven't been able to reproduce it.
> So we can probably remove that line.
> 

Upstream RHEL is setting up the attribute 'syslog_client_type', has 
'typeattribute $1 syslog_client_type' in logging_send_syslog_msg ()

and then
ifdef(`hide_broken_symptoms',`
	kernel_dgram_send(syslog_client_type)
')
in logging.te

When not allowing this access I get a RHEL system that will not boot. 
I'm happy to put this in an 'ifdef distro_redhat'.  Please let me know 
the preference on how to proceed.

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg()
  2019-04-13 15:36           ` Sugar, David
@ 2019-04-13 15:40             ` Russell Coker
  0 siblings, 0 replies; 9+ messages in thread
From: Russell Coker @ 2019-04-13 15:40 UTC (permalink / raw)
  To: Sugar, David; +Cc: Chris PeBenito, selinux-refpolicy

On Sunday, 14 April 2019 1:36:07 AM AEST Sugar, David wrote:
> >>> Why is a socket that everything sends to labeled as kernel_t?
> >>
> >> Russell, you aren't seeing this type of access on Debian?
> > 
> > 
> > 
> > 
> >          ifdef(`init_systemd',`
> >          
> >                  init_domain($1, $2)
> >                  # this may be because of late labelling
> >                  kernel_dgram_send($1)
> > 
> > 
> > 
> >                  allow $1 init_t:unix_dgram_socket sendto;
> >          
> >          ')
> > 
> > 
> > The above is in the upstream policy in the init_daemon_domain()
> > interface.
> > Not sure why.
> > 
> > I've put in an auditallow rule and so far haven't been able to reproduce
> > it.
> > So we can probably remove that line.
> > 
> 
> 
> Upstream RHEL is setting up the attribute 'syslog_client_type', has 
> 'typeattribute $1 syslog_client_type' in logging_send_syslog_msg ()
> 
> and then
> ifdef(`hide_broken_symptoms',`
> 	kernel_dgram_send(syslog_client_type)
> ')
> in logging.te

Well they are stating that it's a symptom of brokenness...

> When not allowing this access I get a RHEL system that will not boot. 
> I'm happy to put this in an 'ifdef distro_redhat'.  Please let me know 
> the preference on how to proceed.

Yes ifdef distro_redhat seems like a good idea.

-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, back to index

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-09 15:09 [PATCH] Add kernel_dgram_send() into logging_send_syslog_msg() Sugar, David
2019-04-10  1:00 ` Russell Coker
2019-04-10  1:07   ` Sugar, David
2019-04-10  1:39     ` Russell Coker
2019-04-10 14:16       ` Sugar, David
2019-04-12 11:54       ` Chris PeBenito
2019-04-13  5:35         ` Russell Coker
2019-04-13 15:36           ` Sugar, David
2019-04-13 15:40             ` Russell Coker

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