From: Gabriel Valcazar Date: Fri, 20 Aug 2021 15:06:12 +0200 Subject: [PATCH 2/2] Make udevadm_t executables run in the udev_t realm This prevents SELinux from denying udev activity in DEY. This is a partial port of the following commit: https://www.spinics.net/lists/selinux-refpolicy/msg00805.html Signed-off-by: Gabriel Valcazar --- policy/modules/system/udev.fc | 4 ++-- policy/modules/system/udev.if | 4 ++-- policy/modules/system/udev.te | 6 +++--- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/policy/modules/system/udev.fc b/policy/modules/system/udev.fc index ceb5b70b3..36d91f3a2 100644 --- a/policy/modules/system/udev.fc +++ b/policy/modules/system/udev.fc @@ -10,7 +10,7 @@ /etc/udev/scripts/.+ -- gen_context(system_u:object_r:udev_helper_exec_t,s0) /usr/bin/udev -- gen_context(system_u:object_r:udev_exec_t,s0) -/usr/bin/udevadm -- gen_context(system_u:object_r:udevadm_exec_t,s0) +/usr/bin/udevadm -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/bin/udevd -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/bin/udevinfo -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/bin/udevsend -- gen_context(system_u:object_r:udev_exec_t,s0) @@ -22,7 +22,7 @@ ifdef(`distro_debian',` ') /usr/sbin/udev -- gen_context(system_u:object_r:udev_exec_t,s0) -/usr/sbin/udevadm -- gen_context(system_u:object_r:udevadm_exec_t,s0) +/usr/sbin/udevadm -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/sbin/udevd -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/sbin/udevsend -- gen_context(system_u:object_r:udev_exec_t,s0) /usr/sbin/udevstart -- gen_context(system_u:object_r:udev_exec_t,s0) diff --git a/policy/modules/system/udev.if b/policy/modules/system/udev.if index 468f83d2e..1b37166d2 100644 --- a/policy/modules/system/udev.if +++ b/policy/modules/system/udev.if @@ -548,10 +548,10 @@ interface(`udev_manage_runtime_files',` # interface(`udevadm_domtrans',` gen_require(` - type udevadm_t, udevadm_exec_t; + type udevadm_t, udev_exec_t; ') - domtrans_pattern($1, udevadm_exec_t, udevadm_t) + domtrans_pattern($1, udev_exec_t, udevadm_t) ') ######################################## diff --git a/policy/modules/system/udev.te b/policy/modules/system/udev.te index 2bd2fcdc7..3bfde5bef 100644 --- a/policy/modules/system/udev.te +++ b/policy/modules/system/udev.te @@ -8,6 +8,7 @@ attribute_role udevadm_roles; type udev_t; type udev_exec_t; +typealias udev_exec_t alias udevadm_exec_t; type udev_helper_exec_t; kernel_domtrans_to(udev_t, udev_exec_t) domain_obj_id_change_exemption(udev_t) @@ -17,9 +18,7 @@ init_daemon_domain(udev_t, udev_exec_t) init_named_socket_activation(udev_t, udev_runtime_t) type udevadm_t; -type udevadm_exec_t; -init_system_domain(udevadm_t, udevadm_exec_t) -application_domain(udevadm_t, udevadm_exec_t) +application_domain(udevadm_t, udev_exec_t) role udevadm_roles types udevadm_t; type udev_etc_t alias etc_udev_t; @@ -86,6 +85,7 @@ manage_files_pattern(udev_t, udev_runtime_t, udev_runtime_t) manage_lnk_files_pattern(udev_t, udev_runtime_t, udev_runtime_t) manage_sock_files_pattern(udev_t, udev_runtime_t, udev_runtime_t) files_runtime_filetrans(udev_t, udev_runtime_t, dir, "udev") +allow udev_t udev_runtime_t:dir watch; kernel_load_module(udev_t) kernel_read_system_state(udev_t)