CTS test for Android security b/169161709

Bug: 169161709
Bug: 170661754
Test: cts-tradefed run cts -m CtsSecurityBulletinHostTestCases -t android.security.cts.CVE_2020_0462#testPocCVE_2020_0462

Change-Id: I6e0aaa7382ec5dc046445f4b9d8e2e17a1db8b87
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/CVE_2020_0462.java b/hostsidetests/securitybulletin/src/android/security/cts/CVE_2020_0462.java
new file mode 100644
index 0000000..fe42a0b
--- /dev/null
+++ b/hostsidetests/securitybulletin/src/android/security/cts/CVE_2020_0462.java
@@ -0,0 +1,46 @@
+/**
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.security.cts;
+
+import android.platform.test.annotations.SecurityTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
+
+import static org.junit.Assume.assumeTrue;
+import static org.junit.Assert.*;
+
+@RunWith(DeviceJUnit4ClassRunner.class)
+public class CVE_2020_0462 extends SecurityTestCase {
+
+    /**
+     * b/169161709
+     */
+    @Test
+    @SecurityTest(minPatchLevel = "2020-12")
+    public void testPocCVE_2020_0462() throws Exception {
+        assumeTrue(containsDriver(getDevice(),
+                "/sys/devices/system/cpu/vulnerabilities/spec_store_bypass"));
+        String spec_store_bypass = AdbUtils.runCommandLine(
+                "cat /sys/devices/system/cpu/vulnerabilities/spec_store_bypass", getDevice());
+        assertFalse(spec_store_bypass.startsWith("Vulnerable"));
+        assertTrue(spec_store_bypass.startsWith("Not affected") ||
+                spec_store_bypass.startsWith("Mitigation"));
+    }
+}