From: "Sugar, David" <dsugar@tresys.com>
To: "selinux-refpolicy@vger.kernel.org" <selinux-refpolicy@vger.kernel.org>
Subject: [PATCH v3] Allow systemd to getattr all files
Date: Thu, 23 Jan 2020 12:40:49 +0000 [thread overview]
Message-ID: <20200123124037.969990-1-dsugar@tresys.com> (raw)
Systemd has ConditionPath.*, ConditionFile.* and ConditionDir* which
are used to check various path/file/directory to control starting a
service. But this requires getattr permissions on the types.
Example denials that fit the problem.
The first example is from lvm where accessing config file.
type=AVC msg=audit(1575427946.229:1624): avc: denied { getattr } for
pid=1 comm="systemd" path="/etc/lvm/lvm.conf" dev="dm-0" ino=51799
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:lvm_etc_t:s0 tclass=file permissive=0
This second example is from chronyd, but it is happening becuase I added
the conditional in a drop-in file.
type=AVC msg=audit(1575427959.882:1901): avc: denied { getattr } for
pid=1 comm="systemd" path="/etc/chrony.conf" dev="dm-0" ino=53824
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:chronyd_conf_t:s0 tclass=file permissive=1
v3 - rework to not use interface and allow getattr for all files
Signed-off-by: Dave Sugar <dsugar@tresys.com>
---
policy/modules/system/init.te | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/policy/modules/system/init.te b/policy/modules/system/init.te
index 281d4fd2..c772ff40 100644
--- a/policy/modules/system/init.te
+++ b/policy/modules/system/init.te
@@ -335,6 +335,11 @@ ifdef(`init_systemd',`
domain_subj_id_change_exemption(init_t)
domain_role_change_exemption(init_t)
+ files_getattr_all_dirs(init_t)
+ files_getattr_all_files(init_t)
+ files_getattr_all_pipes(init_t)
+ files_getattr_all_sockets(init_t)
+ files_read_all_symlinks(init_t)
files_read_all_pids(init_t)
files_list_usr(init_t)
files_list_var(init_t)
--
2.24.1
next reply other threads:[~2020-01-23 12:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 12:40 Sugar, David [this message]
2020-01-30 14:40 ` [PATCH v3] Allow systemd to getattr all files Sugar, David
2020-02-08 14:41 ` Chris PeBenito
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200123124037.969990-1-dsugar@tresys.com \
--to=dsugar@tresys.com \
--cc=selinux-refpolicy@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).