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refpolicy: locallogin - allow sulogin_t user_tty_device_t rw

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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 2025-04-30 11:00:42 -06:00 committed by Yi Zhao
parent 0eb1efe8af
commit b7a64b98ad
2 changed files with 80 additions and 0 deletions
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79
recipes-security/refpolicy/refpolicy/0065-policy-modules-system-locallogin-allow-sulogin_t-use.patch Normal file
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@ -0,0 +1,79 @@
From 4887bfe28a279c7495e23403c401c46bb95d4a41 Mon Sep 17 00:00:00 2001
From: Clayton Casciato <ccasciato@21sw.us>
Date: Tue, 1 Apr 2025 12:18:56 -0600
Subject: [PATCH] locallogin: allow sulogin_t user_tty_device_t rw
type=PROCTITLE proctitle=/usr/sbin/sulogin
type=SYSCALL arch=armeb syscall=openat per=PER_LINUX success=yes exit=3
a0=AT_FDCWD a1=0x4e77d0 a2=O_RDWR|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW a3=0x0
items=0 ppid=432 pid=433 auid=unset uid=root gid=root euid=root
suid=root fsuid=root egid=root sgid=root fsgid=root tty=ttyAMA0
ses=unset comm=sulogin exe=/usr/sbin/sulogin.util-linux
subj=system_u:system_r:sulogin_t:s0 key=(null)
type=AVC avc: denied { open } for pid=433 comm=sulogin
path=/dev/ttyAMA0 dev="devtmpfs" ino=2
scontext=system_u:system_r:sulogin_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
type=AVC avc: denied { read write } for pid=433 comm=sulogin
name=ttyAMA0 dev="devtmpfs" ino=2
scontext=system_u:system_r:sulogin_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
----
type=PROCTITLE proctitle=/usr/sbin/sulogin
type=SYSCALL arch=armeb syscall=ioctl per=PER_LINUX success=yes exit=0
a0=0x3 a1=0x5457 a2=0xbe8cba90 a3=0xbe8cba40 items=0 ppid=432 pid=433
auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root
sgid=root fsgid=root tty=ttyAMA0 ses=unset comm=sulogin
exe=/usr/sbin/sulogin.util-linux subj=system_u:system_r:sulogin_t:s0
key=(null)
type=AVC avc: denied { ioctl } for pid=433 comm=sulogin
path=/dev/ttyAMA0 dev="devtmpfs" ino=2 ioctlcmd=0x5457
scontext=system_u:system_r:sulogin_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
----
type=PROCTITLE proctitle=/usr/sbin/sulogin
type=SYSCALL arch=armeb syscall=statx per=PER_LINUX success=yes exit=0
a0=0x0 a1=0xb6f046ac a2=0x1800 a3=0x7ff items=0 ppid=432 pid=433
auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root
sgid=root fsgid=root tty=ttyAMA0 ses=unset comm=sulogin
exe=/usr/sbin/sulogin.util-linux subj=system_u:system_r:sulogin_t:s0
key=(null)
type=AVC avc: denied { getattr } for pid=433 comm=sulogin
path=/dev/ttyAMA0 dev="devtmpfs" ino=2
scontext=system_u:system_r:sulogin_t:s0
tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file
--
Fedora:
https://github.com/fedora-selinux/selinux-policy/blob/v41.35/policy/modules/system/locallogin.te#L266
Signed-off-by: Clayton Casciato <ccasciato@21sw.us>
Upstream-Status: Backport [https://github.com/SELinuxProject/refpolicy/commit/2240e1a89ea61096b64a172c45fa9db73553ac6d]
Signed-off-by: Clayton Casciato <majortomtosourcecontrol@gmail.com>
---
policy/modules/system/locallogin.te | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/policy/modules/system/locallogin.te b/policy/modules/system/locallogin.te
index fcec23010..c370caf2b 100644
--- a/policy/modules/system/locallogin.te
+++ b/policy/modules/system/locallogin.te
@@ -276,7 +276,7 @@ seutil_read_default_contexts(sulogin_t)
userdom_use_unpriv_users_fds(sulogin_t)
userdom_search_user_home_dirs(sulogin_t)
-userdom_use_user_ptys(sulogin_t)
+userdom_use_user_terminals(sulogin_t)
sysadm_shell_domtrans(sulogin_t)

1
recipes-security/refpolicy/refpolicy_common.inc
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@ -80,6 +80,7 @@ SRC_URI += " \
file://0062-policy-modules-multiple-filetrans-run_machine_id-etc.patch \
file://0063-policy-modules-system-locallogin-dontaudit-sulogin_t.patch \
file://0064-policy-modules-system-locallogin-allow-sulogin_t-unc.patch \
file://0065-policy-modules-system-locallogin-allow-sulogin_t-use.patch \
"
S = "${WORKDIR}/refpolicy"