Strip part of the activity info of another uid if no privilege
The activity info could be from another uid which is different
from the app that hosts the task. The information should be
trimmed if the caller app doesn't have the privilege.
However, removing the entire info may result in app compatibility
issues. So, only swiping the info that are sensitive to empty
string.
Bug: 243130512
Test: verified market app locally
Test: atest RecentTasksTest
Change-Id: I5b6775dd3c4e2ccdacd30741884d336b2eaa70da
diff --git a/services/core/java/com/android/server/wm/AppTaskImpl.java b/services/core/java/com/android/server/wm/AppTaskImpl.java
index e80c260..0bfc48b 100644
--- a/services/core/java/com/android/server/wm/AppTaskImpl.java
+++ b/services/core/java/com/android/server/wm/AppTaskImpl.java
@@ -98,7 +98,7 @@
throw new IllegalArgumentException("Unable to find task ID " + mTaskId);
}
return mService.getRecentTasks().createRecentTaskInfo(task,
- false /* stripExtras */);
+ false /* stripExtras */, true /* getTasksAllowed */);
} finally {
Binder.restoreCallingIdentity(origId);
}
diff --git a/services/core/java/com/android/server/wm/RecentTasks.java b/services/core/java/com/android/server/wm/RecentTasks.java
index 4860762..1fc061b 100644
--- a/services/core/java/com/android/server/wm/RecentTasks.java
+++ b/services/core/java/com/android/server/wm/RecentTasks.java
@@ -976,7 +976,7 @@
continue;
}
- res.add(createRecentTaskInfo(task, true /* stripExtras */));
+ res.add(createRecentTaskInfo(task, true /* stripExtras */, getTasksAllowed));
}
return res;
}
@@ -1895,7 +1895,8 @@
/**
* Creates a new RecentTaskInfo from a Task.
*/
- ActivityManager.RecentTaskInfo createRecentTaskInfo(Task tr, boolean stripExtras) {
+ ActivityManager.RecentTaskInfo createRecentTaskInfo(Task tr, boolean stripExtras,
+ boolean getTasksAllowed) {
final ActivityManager.RecentTaskInfo rti = new ActivityManager.RecentTaskInfo();
// If the recent Task is detached, we consider it will be re-attached to the default
// TaskDisplayArea because we currently only support recent overview in the default TDA.
@@ -1907,6 +1908,9 @@
rti.id = rti.isRunning ? rti.taskId : INVALID_TASK_ID;
rti.persistentId = rti.taskId;
rti.lastSnapshotData.set(tr.mLastTaskSnapshotData);
+ if (!getTasksAllowed) {
+ Task.trimIneffectiveInfo(tr, rti);
+ }
// Fill in organized child task info for the task created by organizer.
if (tr.mCreatedByOrganizer) {
diff --git a/services/core/java/com/android/server/wm/RunningTasks.java b/services/core/java/com/android/server/wm/RunningTasks.java
index 120fec0..0e60274 100644
--- a/services/core/java/com/android/server/wm/RunningTasks.java
+++ b/services/core/java/com/android/server/wm/RunningTasks.java
@@ -142,6 +142,10 @@
task.fillTaskInfo(rti, !mKeepIntentExtra);
// Fill in some deprecated values
rti.id = rti.taskId;
+
+ if (!mAllowed) {
+ Task.trimIneffectiveInfo(task, rti);
+ }
return rti;
}
}
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 5806f79..a259baa 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -3467,6 +3467,54 @@
info.isSleeping = shouldSleepActivities();
}
+ /**
+ * Removes the activity info if the activity belongs to a different uid, which is
+ * different from the app that hosts the task.
+ */
+ static void trimIneffectiveInfo(Task task, TaskInfo info) {
+ final ActivityRecord baseActivity = task.getActivity(r -> !r.finishing,
+ false /* traverseTopToBottom */);
+ final int baseActivityUid =
+ baseActivity != null ? baseActivity.getUid() : task.effectiveUid;
+
+ if (info.topActivityInfo != null
+ && task.effectiveUid != info.topActivityInfo.applicationInfo.uid) {
+ // Making a copy to prevent eliminating the info in the original ActivityRecord.
+ info.topActivityInfo = new ActivityInfo(info.topActivityInfo);
+ info.topActivityInfo.applicationInfo =
+ new ApplicationInfo(info.topActivityInfo.applicationInfo);
+
+ // Strip the sensitive info.
+ info.topActivity = new ComponentName("", "");
+ info.topActivityInfo.packageName = "";
+ info.topActivityInfo.taskAffinity = "";
+ info.topActivityInfo.processName = "";
+ info.topActivityInfo.name = "";
+ info.topActivityInfo.parentActivityName = "";
+ info.topActivityInfo.targetActivity = "";
+ info.topActivityInfo.splitName = "";
+ info.topActivityInfo.applicationInfo.className = "";
+ info.topActivityInfo.applicationInfo.credentialProtectedDataDir = "";
+ info.topActivityInfo.applicationInfo.dataDir = "";
+ info.topActivityInfo.applicationInfo.deviceProtectedDataDir = "";
+ info.topActivityInfo.applicationInfo.manageSpaceActivityName = "";
+ info.topActivityInfo.applicationInfo.nativeLibraryDir = "";
+ info.topActivityInfo.applicationInfo.nativeLibraryRootDir = "";
+ info.topActivityInfo.applicationInfo.processName = "";
+ info.topActivityInfo.applicationInfo.publicSourceDir = "";
+ info.topActivityInfo.applicationInfo.scanPublicSourceDir = "";
+ info.topActivityInfo.applicationInfo.scanSourceDir = "";
+ info.topActivityInfo.applicationInfo.sourceDir = "";
+ info.topActivityInfo.applicationInfo.taskAffinity = "";
+ info.topActivityInfo.applicationInfo.name = "";
+ info.topActivityInfo.applicationInfo.packageName = "";
+ }
+
+ if (task.effectiveUid != baseActivityUid) {
+ info.baseActivity = new ComponentName("", "");
+ }
+ }
+
@Nullable PictureInPictureParams getPictureInPictureParams() {
final Task topTask = getTopMostTask();
if (topTask == null) return null;
diff --git a/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java b/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
index adf694c..db6ac0b 100644
--- a/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
+++ b/services/tests/wmtests/src/com/android/server/wm/RecentTasksTest.java
@@ -30,6 +30,7 @@
import static android.content.pm.ActivityInfo.LAUNCH_MULTIPLE;
import static android.content.pm.ActivityInfo.LAUNCH_SINGLE_INSTANCE;
import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
+import static android.os.Process.NOBODY_UID;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doNothing;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
@@ -1220,20 +1221,35 @@
@Test
public void testCreateRecentTaskInfo_detachedTask() {
- final Task task = createTaskBuilder(".Task").setCreateActivity(true).build();
+ final Task task = createTaskBuilder(".Task").build();
+ final ComponentName componentName = getUniqueComponentName();
+ new ActivityBuilder(mSupervisor.mService)
+ .setTask(task)
+ .setUid(NOBODY_UID)
+ .setComponent(componentName)
+ .build();
final TaskDisplayArea tda = task.getDisplayArea();
assertTrue(task.isAttached());
assertTrue(task.supportsMultiWindow());
- RecentTaskInfo info = mRecentTasks.createRecentTaskInfo(task, true);
+ RecentTaskInfo info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+ true /* getTasksAllowed */);
assertTrue(info.supportsMultiWindow);
+ info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+ false /* getTasksAllowed */);
+
+ assertFalse(info.topActivity.equals(componentName));
+ assertFalse(info.topActivityInfo.packageName.equals(componentName.getPackageName()));
+ assertFalse(info.baseActivity.equals(componentName));
+
// The task can be put in split screen even if it is not attached now.
task.removeImmediately();
- info = mRecentTasks.createRecentTaskInfo(task, true);
+ info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+ true /* getTasksAllowed */);
assertTrue(info.supportsMultiWindow);
@@ -1242,7 +1258,8 @@
doReturn(false).when(tda).supportsNonResizableMultiWindow();
doReturn(false).when(task).isResizeable();
- info = mRecentTasks.createRecentTaskInfo(task, true);
+ info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+ true /* getTasksAllowed */);
assertFalse(info.supportsMultiWindow);
@@ -1250,7 +1267,8 @@
// the device supports it.
doReturn(true).when(tda).supportsNonResizableMultiWindow();
- info = mRecentTasks.createRecentTaskInfo(task, true);
+ info = mRecentTasks.createRecentTaskInfo(task, true /* stripExtras */,
+ true /* getTasksAllowed */);
assertTrue(info.supportsMultiWindow);
}