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refpolicy: systemd - allow systemd_generator_t use user ttys

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Signed-off-by: Clayton Casciato <majortomtosourcecontrol@gmail.com>
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
This commit is contained in:
Clayton Casciato 2025-10-14 12:13:02 -06:00 committed by Yi Zhao
parent 4aebbafb86
commit 2681e5093f
2 changed files with 78 additions and 0 deletions
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77
recipes-security/refpolicy/refpolicy/0070-policy-modules-system-systemd-allow-systemd_generato.patch Normal file
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@ -0,0 +1,77 @@
From 853593e232e1ec568482c42e8d27052990d08e91 Mon Sep 17 00:00:00 2001
From: Clayton Casciato <ccasciato@21sw.us>
Date: Mon, 5 May 2025 11:15:14 -0600
Subject: [PATCH] systemd: allow systemd_generator_t use user ttys
type=PROCTITLE
proctitle=/usr/lib/systemd/system-generators/systemd-getty-generator
/run/systemd/generator /run/systemd/generator.early /run/systemd/gene
type=SYSCALL arch=armeb syscall=openat per=PER_LINUX success=yes exit=4
a0=AT_FDCWD a1=0xbea41b28
a2=O_RDWR|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_CLOEXEC a3=0x0 items=0
ppid=1106 pid=1109 auid=unset uid=root gid=root euid=root suid=root
fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset
comm=systemd-getty-g
exe=/usr/lib/systemd/system-generators/systemd-getty-generator
subj=system_u:system_r:systemd_generator_t:s0 key=(null)
type=AVC avc: denied { open } for pid=1109 comm=systemd-getty-g
path=/dev/ttyAMA0 dev="devtmpfs" ino=2
scontext=system_u:system_r:systemd_generator_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
type=AVC avc: denied { read write } for pid=1109 comm=systemd-getty-g
name=ttyAMA0 dev="devtmpfs" ino=2
scontext=system_u:system_r:systemd_generator_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
----
type=PROCTITLE
proctitle=/usr/lib/systemd/system-generators/systemd-getty-generator
/run/systemd/generator /run/systemd/generator.early /run/systemd/gene
type=SYSCALL arch=armeb syscall=ioctl per=PER_LINUX success=yes exit=0
a0=0x4 a1=TCGETS a2=0xbea41ab0 a3=0xbea41ae4 items=0 ppid=1106 pid=1109
auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root
sgid=root fsgid=root tty=(none) ses=unset comm=systemd-getty-g
exe=/usr/lib/systemd/system-generators/systemd-getty-generator
subj=system_u:system_r:systemd_generator_t:s0 key=(null)
type=AVC avc: denied { ioctl } for pid=1109 comm=systemd-getty-g
path=/dev/ttyAMA0 dev="devtmpfs" ino=2 ioctlcmd=TCGETS
scontext=system_u:system_r:systemd_generator_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
--
Fedora:
matchpathcon /usr/lib/systemd/system-generators/systemd-getty-generator
system_u:object_r:systemd_getty_generator_exec_t:s0
https://github.com/fedora-selinux/selinux-policy/commit/6adfc23f83c3b9078c0245c66095eb78f411bedd#diff-20413b38529167819e3ef86a39929b3638ea684202dc692282e633cd05065969R1322
Signed-off-by: Clayton Casciato <ccasciato@21sw.us>
Upstream-Status: Backport [https://github.com/SELinuxProject/refpolicy/commit/930e04f861ab3e753ca831b0c3a1fe51f4b423f9]
Signed-off-by: Clayton Casciato <majortomtosourcecontrol@gmail.com>
---
policy/modules/system/systemd.te | 3 +++
1 file changed, 3 insertions(+)
diff --git a/policy/modules/system/systemd.te b/policy/modules/system/systemd.te
index 5823fd543..bbcded640 100644
--- a/policy/modules/system/systemd.te
+++ b/policy/modules/system/systemd.te
@@ -595,6 +595,9 @@ udev_read_runtime_files(systemd_generator_t)
mls_file_read_to_clearance(systemd_generator_t)
mls_file_write_to_clearance(systemd_generator_t)
+# for systemd-getty-generator
+userdom_use_user_ttys(systemd_generator_t)
+
ifdef(`distro_gentoo',`
corecmd_shell_entry_type(systemd_generator_t)
')

1
recipes-security/refpolicy/refpolicy_common.inc
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@ -85,6 +85,7 @@ SRC_URI += " \
file://0067-fixdep-dbus.patch \
file://0068-fix-building-when-dbus-module-is-not-enabled.patch \
file://0069-policy-modules-services-oddjob-allow-oddjob_mkhomedi.patch \
file://0070-policy-modules-system-systemd-allow-systemd_generato.patch \
"
S = "${WORKDIR}/refpolicy"