linux-kernel - [PATCH] security: selinux: allow per-file labeling for cgroupfs

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Message-Id: <20170209160242.23405-1-amurdaca@redhat.com>
Date:   Thu,  9 Feb 2017 17:02:42 +0100
From:   Antonio Murdaca <amurdaca@...hat.com>
To:     selinux@...ho.nsa.gov
Cc:     gary.tierney@....com, linux-kernel@...r.kernel.org,
        dwalsh@...hat.com, pmoore@...hat.com, vgoyal@...hat.com,
        cgroups@...r.kernel.org, Antonio Murdaca <runcom@...hat.com>
Subject: [PATCH] security: selinux: allow per-file labeling for cgroupfs

From: Antonio Murdaca <runcom@...hat.com>

This patch allows genfscon per-file labeling for cgroupfs. For instance,
this allows to label the "release_agent" file within each
cgroup mount and limit writes to it.

Signed-off-by: Antonio Murdaca <amurdaca@...hat.com>
---
 security/selinux/hooks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9a8f12f..5a3138e 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -808,6 +808,8 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
 	if (!strcmp(sb->s_type->name, "debugfs") ||
 	    !strcmp(sb->s_type->name, "sysfs") ||
+	    !strcmp(sb->s_type->name, "cgroup") ||
+	    !strcmp(sb->s_type->name, "cgroup2") ||
 	    !strcmp(sb->s_type->name, "pstore"))
 		sbsec->flags |= SE_SBGENFS;
 
-- 
2.9.3