Merge changes from topic "fail-validation-q" into qt-qpr1-dev

* changes:
  Delete orphaned staging directories for staged session on reboot
  Clean up staged session data on validation failure

services/core/java/com/android/server/pm/PackageInstallerService.java

@@ -287,6 +287,10 @@ public class PackageInstallerService extends IPackageInstaller.Stub implements
         final ArraySet<File> unclaimedStages = newArraySet(
                 stagingDir.listFiles(sStageFilter));
 
+        // We also need to clean up orphaned staging directory for staged sessions
+        final File stagedSessionStagingDir = Environment.getDataStagingDirectory(volumeUuid);
+        unclaimedStages.addAll(newArraySet(stagedSessionStagingDir.listFiles()));
+
         // Ignore stages claimed by active sessions
         for (int i = 0; i < mSessions.size(); i++) {
             final PackageInstallerSession session = mSessions.valueAt(i);

services/core/java/com/android/server/pm/PackageInstallerSession.java

@@ -881,6 +881,12 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
                             + mParentSessionId +  " and may not be committed directly.");
         }
         if (!markAsCommitted(statusReceiver, forTransfer)) {
+            if (isStaged()) {
+                // cleanStageDir calls mSessionProvider to get hold of child sessions, which in turn
+                // needs PackageInstallerService#mSessions lock. So we should not call cleanStageDir
+                // while holding mLock to avoid lock inversion.
+                cleanStageDir();
+            }
             return;
         }
         if (isMultiPackage()) {