[tests/selinux] pr775-checkpolicy-revdeps: Add a test for bogus warning in selinux_ima_measure_state()

[Ondrej Mosnacek <omosnace@redhat.com>]

            A new commit has been pushed.

            Repo   : tests/selinux
            Branch : pr775-checkpolicy-revdeps
            Commit : fd520ce6f3cd0e83db4c306bd2e0958ef8518ce5
            Author : Ondrej Mosnacek <omosnace@redhat.com>
            Date   : 2022-05-10T15:31:19+02:00
            Stats  : +54/-0 in 2 file(s)
            URL    : https://src.fedoraproject.org/tests/selinux/c/fd520ce6f3cd0e83db4c306bd2e0958ef8518ce5?branch=pr775-checkpolicy-revdeps

            Log:
            Add a test for bogus warning in selinux_ima_measure_state()

Verifies:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ce2fc710c9d2b25afc710f49bb2065b4439a62bc

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>

---
diff --git a/kernel/bogus-warning-in-selinux_ima_measure_state/main.fmf b/kernel/bogus-warning-in-selinux_ima_measure_state/main.fmf
new file mode 100644
index 0000000..57e2859
--- /dev/null
+++ b/kernel/bogus-warning-in-selinux_ima_measure_state/main.fmf
@@ -0,0 +1,22 @@
+summary: Regression test for bogus WARNING in SELinux
+description: |
+    Verify that selinux_ima_measure_state() doesn't trigger a bogus
+    lock-related WARN_ON() when the mutex is held by another task.
+contact: Ondrej Mosnacek <omosnace@redhat.com>
+component:
+- kernel
+framework: beakerlib
+require:
+- policycoreutils
+duration: 5m
+tier: 2
+enabled: true
+adjust:
+- enabled: false
+  when: distro < fedora-36
+  because: some kernels on Fedora 35 and below don't have the fix
+- enabled: false
+  when: distro < rhel-9.1
+  because: not expected to be fixed earlier than RHEL-9.1
+link:
+- verifies: https://bugzilla.redhat.com/show_bug.cgi?id=2050966

diff --git a/kernel/bogus-warning-in-selinux_ima_measure_state/runtest.sh b/kernel/bogus-warning-in-selinux_ima_measure_state/runtest.sh
new file mode 100755
index 0000000..061b9c7
--- /dev/null
+++ b/kernel/bogus-warning-in-selinux_ima_measure_state/runtest.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# vim: dict=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+# SPDX-License-Identifier: GPLv2
+# Copyright (c) 2022 Red Hat, Inc.
+# Author: Ondrej Mosnacek <omosnace@redhat.com>
+
+# Include Beakerlib environment
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+function trigger_the_bug() {
+    while true; do echo 0 > /sys/fs/selinux/checkreqprot; done &
+    while true; do load_policy; done &
+
+    sleep 15s
+
+    kill $(jobs -p)
+    wait $(jobs -p)
+    return 0
+}
+
+rlJournalStart
+    rlPhaseStartSetup
+        rlRun "uname -r" 0 "Show the running kernel version"
+    rlPhaseEnd
+
+    rlPhaseStartTest
+        rlRun "trigger_the_bug" 0 "Run the reproducer"
+        rlRun "dmesg | grep -E 'WARNING:.*selinux_ima_measure_state'" 1 \
+            "Check that dmesg doesn't contain relevant WARNING lines"
+    rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd