systemd/0023-dev-console-must-be-labeled-with-SELinux-label.patch

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2016-03-17 13:26:01 +00:00
From 641a7f0c61ff42ea55ad7152e7f874ea5d680a2d Mon Sep 17 00:00:00 2001
From: Dan Walsh <dwalsh@redhat.com>
Date: Wed, 9 Mar 2016 09:29:25 -0500
Subject: [PATCH] /dev/console must be labeled with SELinux label
If the user specifies an selinux_apifs_context all content created in
the container including /dev/console should use this label.
Currently when this uses the default label it gets labeled user_devpts_t,
which would require us to write a policy allowing container processes to
manage user_devpts_t. This means that an escaped process would be allowed
to attack all users terminals as well as other container terminals. Changing
the label to match the apifs_context, means the processes would only be allowed
to manage their specific tty.
This change fixes a problem preventing RKT containers from working with systemd-nspawn.
(cherry picked from commit 68b020494d1ff085281061413d9236b5865ef238)
---
src/nspawn/nspawn.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index ef348c335b..8c06f6ef75 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -87,6 +87,7 @@
#ifdef HAVE_SECCOMP
#include "seccomp-util.h"
#endif
+#include "selinux-util.h"
#include "signal-util.h"
#include "socket-util.h"
#include "stat-util.h"
@@ -3286,6 +3287,12 @@ int main(int argc, char *argv[]) {
goto finish;
}
+ if (arg_selinux_apifs_context) {
+ r = mac_selinux_apply(console, arg_selinux_apifs_context);
+ if (r < 0)
+ goto finish;
+ }
+
if (unlockpt(master) < 0) {
r = log_error_errno(errno, "Failed to unlock tty: %m");
goto finish;