Adding multiuser pendingintent linting to default Android linting (093f6ba8) · Commits · e / os / android_frameworks_base

tools/lint/framework/checks/src/main/java/com/google/android/lint/AndroidFrameworkIssueRegistry.kt

+2 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package com.google.android.lint
		import com.android.tools.lint.client.api.IssueRegistry
		import com.android.tools.lint.client.api.Vendor
		import com.android.tools.lint.detector.api.CURRENT_API
		import com.google.android.lint.multiuser.PendingIntentGetActivityDetector
		import com.google.android.lint.parcel.SaferParcelChecker
		import com.google.auto.service.AutoService

		@@ -40,6 +41,7 @@ class AndroidFrameworkIssueRegistry : IssueRegistry() {
		PermissionMethodDetector.ISSUE_PERMISSION_METHOD_USAGE,
		PermissionMethodDetector.ISSUE_CAN_BE_PERMISSION_METHOD,
		FeatureAutomotiveDetector.ISSUE,
		PendingIntentGetActivityDetector.ISSUE_PENDING_INTENT_GET_ACTIVITY,
		)

		override val api: Int

tools/lint/framework/checks/src/main/java/com/google/android/lint/multiuser/PendingIntentGetActivityDetector.kt

0 → 100644

+107 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2025 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 com.google.android.lint.multiuser

		import com.android.tools.lint.detector.api.Category
		import com.android.tools.lint.detector.api.Detector
		import com.android.tools.lint.detector.api.Implementation
		import com.android.tools.lint.detector.api.Issue
		import com.android.tools.lint.detector.api.JavaContext
		import com.android.tools.lint.detector.api.Scope
		import com.android.tools.lint.detector.api.Severity
		import com.android.tools.lint.detector.api.SourceCodeScanner
		import com.intellij.psi.PsiMethod
		import java.util.EnumSet
		import org.jetbrains.uast.UCallExpression

		/**
		* Detector for flagging potential multiuser issues in `PendingIntent.getActivity()` calls.
		*
		* This detector checks for calls to `PendingIntent#getActivity()` and
		* reports a warning if such a call is found, suggesting that the
		* default user 0 context might not be the right one.
		*/
		class PendingIntentGetActivityDetector : Detector(), SourceCodeScanner {

		companion object {

		val description = """Flags potential multiuser issue in PendingIntent.getActivity() calls."""

		val EXPLANATION =
		"""
		Problem:

		Calling `PendingIntent.getActivity()` in the `system_server` often accidentally uses the user 0 context. Moreover, since there's no explicit user parameter in the `getActivity` method, it can be hard to tell which user the `PendingIntent` activity is associated with, making the code error-prone and less readable.

		Solution:

		Always use the user aware methods to refer the correct user context. You can achieve this by:

		* Using `PendingIntent.getActivityAsUser(...)`: This API allows you to explicitly specify the user for the activity.

		```java
		PendingIntent.getActivityAsUser(
		mContext, /requestCode=/0, intent,
		PendingIntent.FLAG_IMMUTABLE, /options=/null,
		UserHandle.of(mUserId));
		```

		When to Ignore this Warning:

		You can safely ignore this warning if you are certain that:

		* You've confirmed that the `PendingIntent` activity you're targeting is the correct one and is rightly associated with the context parameter passed into the `PendingIntent.getActivity` method.

		Note: If you are unsure about the user context, it's best to err on the side of caution and explicitly specify the user using the method specified above.

		For any further questions, please reach out to go/multiuser-help.
		""".trimIndent()

		val ISSUE_PENDING_INTENT_GET_ACTIVITY: Issue =
		Issue.create(
		id = "PendingIntent#getActivity",
		briefDescription = description,
		explanation = EXPLANATION,
		category = Category.SECURITY,
		priority = 8,
		severity = Severity.WARNING,
		implementation =
		Implementation(
		PendingIntentGetActivityDetector::class.java,
		EnumSet.of(Scope.JAVA_FILE, Scope.TEST_SOURCES),
		),
		)
		}

		override fun getApplicableMethodNames() = listOf("getActivity")

		override fun visitMethodCall(context: JavaContext, node: UCallExpression, method: PsiMethod) {
		// Check if the method call is PendingIntent.getActivity
		if (
		context.evaluator.isMemberInClass(method, "android.app.PendingIntent") &&
		method.name == "getActivity"
		) {
		context.report(
		ISSUE_PENDING_INTENT_GET_ACTIVITY,
		node,
		context.getLocation(node),
		"Using `PendingIntent.getActivity(...)` might not be multiuser-aware. " +
		"Consider using the user aware method `PendingIntent.getActivityAsUser(...)`.",
		)
		}
		}
		}

tools/lint/framework/checks/src/test/java/com/google/android/lint/multiuser/PendingIntentGetActivityDetectorTest.kt

0 → 100644

+173 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2025 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 com.google.android.lint.multiuser

		import com.android.tools.lint.checks.infrastructure.LintDetectorTest
		import com.android.tools.lint.checks.infrastructure.TestFile
		import com.android.tools.lint.checks.infrastructure.TestLintTask
		import com.android.tools.lint.detector.api.Detector
		import com.android.tools.lint.detector.api.Issue

		@Suppress("UnstableApiUsage")
		class PendingIntentGetActivityDetectorTest : LintDetectorTest() {

		override fun getDetector(): Detector = PendingIntentGetActivityDetector()

		override fun getIssues(): List<Issue> =
		listOf(PendingIntentGetActivityDetector.ISSUE_PENDING_INTENT_GET_ACTIVITY)

		override fun lint(): TestLintTask = super.lint().allowMissingSdk(true)

		fun testPendingIntentGetActivity() {
		lint()
		.files(
		java(
		"""
		package test.pkg;

		import android.app.PendingIntent;
		import android.content.Context;
		import android.content.Intent;

		public class TestClass {
		private Context mContext;

		public void testMethod(Intent intent) {
		PendingIntent.getActivity(
		mContext, /requestCode=/0, intent,
		PendingIntent.FLAG_IMMUTABLE, /options=/null
		);
		}
		}
		"""
		)
		.indented(),
		*stubs,
		)
		.issues(PendingIntentGetActivityDetector.ISSUE_PENDING_INTENT_GET_ACTIVITY)
		.run()
		.expect(
		"""
		src/test/pkg/TestClass.java:11: Warning: Using PendingIntent.getActivity(...) might not be multiuser-aware. Consider using the user aware method PendingIntent.getActivityAsUser(...). [PendingIntent#getActivity]
		PendingIntent.getActivity(
		^
		0 errors, 1 warnings
		"""
		)
		}

		fun testPendingIntentGetActivityAsUser() {
		lint()
		.files(
		java(
		"""
		package test.pkg;

		import android.app.PendingIntent;
		import android.content.Context;
		import android.content.Intent;
		import android.os.UserHandle;

		public class TestClass {
		private Context mContext;

		public void testMethod(Intent intent) {
		PendingIntent.getActivityAsUser(
		mContext, /requestCode=/0, intent,
		0, /options=/null,
		UserHandle.CURRENT
		);
		}
		}
		"""
		)
		.indented(),
		*stubs,
		)
		.issues(PendingIntentGetActivityDetector.ISSUE_PENDING_INTENT_GET_ACTIVITY)
		.run()
		.expectClean()
		}

		private val pendingIntentStub: TestFile =
		java(
		"""
		package android.app;

		import android.content.Context;
		import android.content.Intent;
		import android.os.UserHandle;

		public class PendingIntent {
		public static boolean getActivity(Context context, int requestCode, Intent intent, int flags) {
		return true;
		}

		public static boolean getActivityAsUser(
		Context context,
		int requestCode,
		Intent intent,
		int flags,
		UserHandle userHandle
		) {
		return true;
		}
		}
		"""
		)

		private val contxtStub: TestFile =
		java(
		"""
		package android.content;

		import android.os.UserHandle;

		public class Context {

		public Context createContextAsUser(UserHandle userHandle, int flags) {
		return this;
		}
		}

		"""
		)

		private val userHandleStub: TestFile =
		java(
		"""
		package android.os;

		public class UserHandle {

		}

		"""
		)

		private val intentStub: TestFile =
		java(
		"""
		package android.content;

		public class Intent {

		}
		"""
		)

		private val stubs = arrayOf(pendingIntentStub, contxtStub, userHandleStub, intentStub)
		}