From dd2569fbb053719f7df7ef8fdbb45cf47156a701 Mon Sep 17 00:00:00 2001
From: John Johansen <john.johansen@canonical.com>
Date: Fri Jun 5 18:12:21 2020 -0700
Subject: [PATCH] apparmor: fix introspection of of task mode for unconfined tasks
Git-commit: dd2569fbb053719f7df7ef8fdbb45cf47156a701
References: git-fixes
Patch-mainline: v5.8-rc1
Fix two issues with introspecting the task mode.
1. If a task is attached to a unconfined profile that is not the
ns->unconfined profile then. Mode the mode is always reported
as -
$ ps -Z
LABEL PID TTY TIME CMD
unconfined 1287 pts/0 00:00:01 bash
test (-) 1892 pts/0 00:00:00 ps
instead of the correct value of (unconfined) as shown below
$ ps -Z
LABEL PID TTY TIME CMD
unconfined 2483 pts/0 00:00:01 bash
test (unconfined) 3591 pts/0 00:00:00 ps
2. if a task is confined by a stack of profiles that are unconfined
the output of label mode is again the incorrect value of (-) like
above, instead of (unconfined). This is because the visibile
profile count increment is skipped by the special casing of
unconfined.
Fixes: f1bd904175e8 ("apparmor: add the base fns() for domain labels")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
diff --git a/security/apparmor/label.c b/security/apparmor/label.c
index 676eebc..23f7a19 100644
--- a/security/apparmor/label.c
+++ b/security/apparmor/label.c
@@ -1558,13 +1558,13 @@ static const char *label_modename(struct aa_ns *ns, struct aa_label *label,
label_for_each(i, label, profile) {
if (aa_ns_visible(ns, profile->ns, flags & FLAG_VIEW_SUBNS)) {
- if (profile->mode == APPARMOR_UNCONFINED)
+ count++;
+ if (profile == profile->ns->unconfined)
/* special case unconfined so stacks with
* unconfined don't report as mixed. ie.
* profile_foo//&:ns1:unconfined (mixed)
*/
continue;
- count++;
if (mode == -1)
mode = profile->mode;
else if (mode != profile->mode)