[gentoo-commits] proj/hardened-refpolicy:master commit in: policy/modules/system/, policy/modules/kernel/

["Jason Zaman" <perfinion@gentoo.org>]

commit:     9f6c6ae09df158fda4a027209642d9393c471b03
Author:     Kenton Groombridge <me <AT> concord <DOT> sh>
AuthorDate: Sat May  7 01:16:29 2022 +0000
Commit:     Jason Zaman <perfinion <AT> gentoo <DOT> org>
CommitDate: Sat Sep  3 18:41:55 2022 +0000
URL:        https://gitweb.gentoo.org/proj/hardened-refpolicy.git/commit/?id=9f6c6ae0

term, init: allow systemd to watch and watch reads on unallocated ttys

As of systemd 250, systemd needs to be able to add a watch on and watch
reads on unallocated ttys in order to start getty.

systemd[55548]: getty <AT> tty1.service: Failed to set up standard input: Permission denied
systemd[55548]: getty <AT> tty1.service: Failed at step STDIN spawning /sbin/agetty: Permission denied

time->Fri May  6 21:17:58 2022
type=PROCTITLE msg=audit(1651886278.452:1770): proctitle="(agetty)"
type=PATH msg=audit(1651886278.452:1770): item=0 name="/dev/tty1" inode=18 dev=00:05 mode=020620 ouid=0 ogid=5 rdev=04:01 obj=system_u:object_r:tty_device_t:s0 nametype=NORMAL cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 cap_frootid=0
type=CWD msg=audit(1651886278.452:1770): cwd="/"
type=SYSCALL msg=audit(1651886278.452:1770): arch=c000003e syscall=254 success=no exit=-13 a0=3 a1=60ba5c21e020 a2=18 a3=23 items=1 ppid=1 pid=55551 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="(agetty)" exe="/lib/systemd/systemd" subj=system_u:system_r:init_t:s0 key=(null)
type=AVC msg=audit(1651886278.452:1770): avc:  denied  { watch watch_reads } for  pid=55551 comm="(agetty)" path="/dev/tty1" dev="devtmpfs" ino=18 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=0

Signed-off-by: Kenton Groombridge <me <AT> concord.sh>
Signed-off-by: Jason Zaman <perfinion <AT> gentoo.org>

 policy/modules/kernel/terminal.if | 38 ++++++++++++++++++++++++++++++++++++++
 policy/modules/system/init.te     |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/policy/modules/kernel/terminal.if b/policy/modules/kernel/terminal.if
index 55c18dff..e5645c7c 100644
--- a/policy/modules/kernel/terminal.if
+++ b/policy/modules/kernel/terminal.if
@@ -1284,6 +1284,44 @@ interface(`term_dontaudit_use_unallocated_ttys',`
 	dontaudit $1 tty_device_t:chr_file rw_chr_file_perms;
 ')
 
+########################################
+## <summary>
+##	Watch unallocated ttys.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`term_watch_unallocated_ttys',`
+	gen_require(`
+		type tty_device_t;
+	')
+
+	dev_list_all_dev_nodes($1)
+	allow $1 tty_device_t:chr_file watch;
+')
+
+########################################
+## <summary>
+##	Watch reads on unallocated ttys.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`term_watch_reads_unallocated_ttys',`
+	gen_require(`
+		type tty_device_t;
+	')
+
+	dev_list_all_dev_nodes($1)
+	allow $1 tty_device_t:chr_file watch_reads;
+')
+
 ########################################
 ## <summary>
 ##	Get the attributes of all tty device nodes.

diff --git a/policy/modules/system/init.te b/policy/modules/system/init.te
index db06551c..a93eefed 100644
--- a/policy/modules/system/init.te
+++ b/policy/modules/system/init.te
@@ -523,6 +523,8 @@ ifdef(`init_systemd',`
 	term_create_devpts_dirs(init_t)
 	term_create_ptmx(init_t)
 	term_create_controlling_term(init_t)
+	term_watch_unallocated_ttys(init_t)
+	term_watch_reads_unallocated_ttys(init_t)
 
 	# udevd is a "systemd kobject uevent socket activated daemon"
 	udev_create_kobject_uevent_sockets(init_t)