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)
