diff --git a/Android.bp b/Android.bp
index 1aa297f..b072087 100644
--- a/Android.bp
+++ b/Android.bp
@@ -136,6 +136,9 @@
         // For the generated R.java and Manifest.java
         ":framework-res{.aapt.srcjar}",
 
+        // Java/AIDL sources to be moved out to CrashRecovery module
+        ":framework-crashrecovery-sources",
+
         // etc.
         ":framework-javastream-protos",
         ":statslog-framework-java-gen", // FrameworkStatsLog.java
diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 3d01011..95dc07f 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -298,7 +298,7 @@
     field public static final String RECOVER_KEYSTORE = "android.permission.RECOVER_KEYSTORE";
     field public static final String REGISTER_CALL_PROVIDER = "android.permission.REGISTER_CALL_PROVIDER";
     field public static final String REGISTER_CONNECTION_MANAGER = "android.permission.REGISTER_CONNECTION_MANAGER";
-    field public static final String REGISTER_NSD_OFFLOAD_ENGINE = "android.permission.REGISTER_NSD_OFFLOAD_ENGINE";
+    field @FlaggedApi("com.android.net.flags.register_nsd_offload_engine") public static final String REGISTER_NSD_OFFLOAD_ENGINE = "android.permission.REGISTER_NSD_OFFLOAD_ENGINE";
     field public static final String REGISTER_SIM_SUBSCRIPTION = "android.permission.REGISTER_SIM_SUBSCRIPTION";
     field public static final String REGISTER_STATS_PULL_ATOM = "android.permission.REGISTER_STATS_PULL_ATOM";
     field public static final String REMOTE_DISPLAY_PROVIDER = "android.permission.REMOTE_DISPLAY_PROVIDER";
diff --git a/core/java/android/os/storage/OWNERS b/core/java/android/os/storage/OWNERS
index e5b76f6..bf22dcc 100644
--- a/core/java/android/os/storage/OWNERS
+++ b/core/java/android/os/storage/OWNERS
@@ -4,14 +4,16 @@
 
 # Android Storage Team
 alukin@google.com
-corinac@google.com
+ankitavyas@google.com
 dipankarb@google.com
+gargshivam@google.com
 krishang@google.com
+riyaghai@google.com
 sahanas@google.com
 sergeynv@google.com
+shikhamalhotra@google.com
 shubhisaxena@google.com
 tylersaunders@google.com
 
 maco@google.com
 nandana@google.com
-narayan@google.com
diff --git a/core/java/com/android/internal/pm/OWNERS b/core/java/com/android/internal/pm/OWNERS
new file mode 100644
index 0000000..6ef34e2
--- /dev/null
+++ b/core/java/com/android/internal/pm/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 36137
+
+file:/PACKAGE_MANAGER_OWNERS
+
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 0e753e5..f7b6a7b 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2278,6 +2278,7 @@
     <!-- Allows system apps to call methods to register itself as a mDNS offload engine.
         <p>Not for use by third-party or privileged applications.
         @SystemApi
+        @FlaggedApi("com.android.net.flags.register_nsd_offload_engine")
         @hide This should only be used by system apps.
     -->
     <permission android:name="android.permission.REGISTER_NSD_OFFLOAD_ENGINE"
diff --git a/packages/CrashRecovery/OWNERS b/packages/CrashRecovery/OWNERS
new file mode 100644
index 0000000..daa0211
--- /dev/null
+++ b/packages/CrashRecovery/OWNERS
@@ -0,0 +1,3 @@
+ancr@google.com
+harshitmahajan@google.com
+robertogil@google.com
diff --git a/packages/CrashRecovery/framework/Android.bp b/packages/CrashRecovery/framework/Android.bp
new file mode 100644
index 0000000..b2af315
--- /dev/null
+++ b/packages/CrashRecovery/framework/Android.bp
@@ -0,0 +1,9 @@
+filegroup {
+    name: "framework-crashrecovery-sources",
+    srcs: [
+        "java/**/*.java",
+        "java/**/*.aidl",
+    ],
+    path: "java",
+    visibility: ["//frameworks/base:__subpackages__"],
+}
diff --git a/core/java/android/service/watchdog/ExplicitHealthCheckService.java b/packages/CrashRecovery/framework/java/android/service/watchdog/ExplicitHealthCheckService.java
similarity index 100%
rename from core/java/android/service/watchdog/ExplicitHealthCheckService.java
rename to packages/CrashRecovery/framework/java/android/service/watchdog/ExplicitHealthCheckService.java
diff --git a/core/java/android/service/watchdog/IExplicitHealthCheckService.aidl b/packages/CrashRecovery/framework/java/android/service/watchdog/IExplicitHealthCheckService.aidl
similarity index 96%
rename from core/java/android/service/watchdog/IExplicitHealthCheckService.aidl
rename to packages/CrashRecovery/framework/java/android/service/watchdog/IExplicitHealthCheckService.aidl
index 78c0328..9096509 100644
--- a/core/java/android/service/watchdog/IExplicitHealthCheckService.aidl
+++ b/packages/CrashRecovery/framework/java/android/service/watchdog/IExplicitHealthCheckService.aidl
@@ -21,6 +21,7 @@
 /**
  * @hide
  */
+@PermissionManuallyEnforced
 oneway interface IExplicitHealthCheckService
 {
     void setCallback(in @nullable RemoteCallback callback);
diff --git a/core/java/android/service/watchdog/OWNERS b/packages/CrashRecovery/framework/java/android/service/watchdog/OWNERS
similarity index 100%
rename from core/java/android/service/watchdog/OWNERS
rename to packages/CrashRecovery/framework/java/android/service/watchdog/OWNERS
diff --git a/core/java/android/service/watchdog/PackageConfig.aidl b/packages/CrashRecovery/framework/java/android/service/watchdog/PackageConfig.aidl
similarity index 100%
rename from core/java/android/service/watchdog/PackageConfig.aidl
rename to packages/CrashRecovery/framework/java/android/service/watchdog/PackageConfig.aidl
diff --git a/packages/CrashRecovery/services/Android.bp b/packages/CrashRecovery/services/Android.bp
new file mode 100644
index 0000000..27ddff9
--- /dev/null
+++ b/packages/CrashRecovery/services/Android.bp
@@ -0,0 +1,9 @@
+filegroup {
+    name: "services-crashrecovery-sources",
+    srcs: [
+        "java/**/*.java",
+        "java/**/*.aidl",
+    ],
+    path: "java",
+    visibility: ["//frameworks/base:__subpackages__"],
+}
diff --git a/services/core/java/com/android/server/ExplicitHealthCheckController.java b/packages/CrashRecovery/services/java/com/android/server/ExplicitHealthCheckController.java
similarity index 100%
rename from services/core/java/com/android/server/ExplicitHealthCheckController.java
rename to packages/CrashRecovery/services/java/com/android/server/ExplicitHealthCheckController.java
diff --git a/services/core/java/com/android/server/PackageWatchdog.java b/packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java
similarity index 100%
rename from services/core/java/com/android/server/PackageWatchdog.java
rename to packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java
diff --git a/services/core/java/com/android/server/RescueParty.java b/packages/CrashRecovery/services/java/com/android/server/RescueParty.java
similarity index 100%
rename from services/core/java/com/android/server/RescueParty.java
rename to packages/CrashRecovery/services/java/com/android/server/RescueParty.java
diff --git a/services/core/java/com/android/server/rollback/RollbackPackageHealthObserver.java b/packages/CrashRecovery/services/java/com/android/server/rollback/RollbackPackageHealthObserver.java
similarity index 100%
rename from services/core/java/com/android/server/rollback/RollbackPackageHealthObserver.java
rename to packages/CrashRecovery/services/java/com/android/server/rollback/RollbackPackageHealthObserver.java
diff --git a/services/core/java/com/android/server/rollback/WatchdogRollbackLogger.java b/packages/CrashRecovery/services/java/com/android/server/rollback/WatchdogRollbackLogger.java
similarity index 100%
rename from services/core/java/com/android/server/rollback/WatchdogRollbackLogger.java
rename to packages/CrashRecovery/services/java/com/android/server/rollback/WatchdogRollbackLogger.java
diff --git a/services/core/Android.bp b/services/core/Android.bp
index 22f8570..77b8b02 100644
--- a/services/core/Android.bp
+++ b/services/core/Android.bp
@@ -122,6 +122,9 @@
         "java/com/android/server/am/EventLogTags.logtags",
         "java/com/android/server/wm/EventLogTags.logtags",
         "java/com/android/server/policy/EventLogTags.logtags",
+
+        // Java/AIDL sources to be moved out to CrashRecovery module
+        ":services-crashrecovery-sources",
     ],
 
     libs: [
@@ -153,7 +156,7 @@
         "android.hardware.boot-V1.0-java", // HIDL
         "android.hardware.boot-V1.1-java", // HIDL
         "android.hardware.boot-V1.2-java", // HIDL
-        "android.hardware.boot-V1-java",   // AIDL
+        "android.hardware.boot-V1-java", // AIDL
         "android.hardware.broadcastradio-V2.0-java", // HIDL
         "android.hardware.broadcastradio-V1-java", // AIDL
         "android.hardware.health-V1.0-java", // HIDL
diff --git a/services/core/java/com/android/server/BootReceiver.java b/services/core/java/com/android/server/BootReceiver.java
index 572e9c2..926d7a4 100644
--- a/services/core/java/com/android/server/BootReceiver.java
+++ b/services/core/java/com/android/server/BootReceiver.java
@@ -62,6 +62,7 @@
 import java.nio.file.attribute.PosixFilePermissions;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.concurrent.locks.ReentrantLock;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -328,9 +329,11 @@
      * @param tombstone path to the tombstone
      * @param proto whether the tombstone is stored as proto
      * @param processName the name of the process corresponding to the tombstone
+     * @param tmpFileLock the lock for reading/writing tmp files
      */
     public static void addTombstoneToDropBox(
-                Context ctx, File tombstone, boolean proto, String processName) {
+                Context ctx, File tombstone, boolean proto, String processName,
+                ReentrantLock tmpFileLock) {
         final DropBoxManager db = ctx.getSystemService(DropBoxManager.class);
         if (db == null) {
             Slog.e(TAG, "Can't log tombstone: DropBoxManager not available");
@@ -351,39 +354,11 @@
                     // due to rate limiting. Do this by enclosing the proto tombsstone in a
                     // container proto that has the dropped entry count and the proto tombstone as
                     // bytes (to avoid the complexity of reading and writing nested protos).
-
-                    // Read the proto tombstone file as bytes.
-                    final byte[] tombstoneBytes = Files.readAllBytes(tombstone.toPath());
-
-                    final File tombstoneProtoWithHeaders = File.createTempFile(
-                            tombstone.getName(), ".tmp", TOMBSTONE_TMP_DIR);
-                    Files.setPosixFilePermissions(
-                            tombstoneProtoWithHeaders.toPath(),
-                            PosixFilePermissions.fromString("rw-rw----"));
-
-                    // Write the new proto container proto with headers.
-                    ParcelFileDescriptor pfd;
+                    tmpFileLock.lock();
                     try {
-                        pfd = ParcelFileDescriptor.open(tombstoneProtoWithHeaders, MODE_READ_WRITE);
-
-                        ProtoOutputStream protoStream = new ProtoOutputStream(
-                                pfd.getFileDescriptor());
-                        protoStream.write(TombstoneWithHeadersProto.TOMBSTONE, tombstoneBytes);
-                        protoStream.write(
-                                TombstoneWithHeadersProto.DROPPED_COUNT,
-                                rateLimitResult.droppedCountSinceRateLimitActivated());
-                        protoStream.flush();
-
-                        // Add the proto to dropbox.
-                        db.addFile(TAG_TOMBSTONE_PROTO_WITH_HEADERS, tombstoneProtoWithHeaders, 0);
-                    } catch (FileNotFoundException ex) {
-                        Slog.e(TAG, "failed to open for write: " + tombstoneProtoWithHeaders, ex);
-                        throw ex;
+                        addAugmentedProtoToDropbox(tombstone, db, rateLimitResult);
                     } finally {
-                        // Remove the temporary file.
-                        if (tombstoneProtoWithHeaders != null) {
-                            tombstoneProtoWithHeaders.delete();
-                        }
+                        tmpFileLock.unlock();
                     }
                 }
             } else {
@@ -399,6 +374,44 @@
         writeTimestamps(timestamps);
     }
 
+    private static void addAugmentedProtoToDropbox(
+                File tombstone, DropBoxManager db,
+                DropboxRateLimiter.RateLimitResult rateLimitResult) throws IOException {
+        // Read the proto tombstone file as bytes.
+        final byte[] tombstoneBytes = Files.readAllBytes(tombstone.toPath());
+
+        final File tombstoneProtoWithHeaders = File.createTempFile(
+                tombstone.getName(), ".tmp", TOMBSTONE_TMP_DIR);
+        Files.setPosixFilePermissions(
+                tombstoneProtoWithHeaders.toPath(),
+                PosixFilePermissions.fromString("rw-rw----"));
+
+        // Write the new proto container proto with headers.
+        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.open(
+                    tombstoneProtoWithHeaders, MODE_READ_WRITE)) {
+            ProtoOutputStream protoStream =
+                    new ProtoOutputStream(pfd.getFileDescriptor());
+            protoStream.write(TombstoneWithHeadersProto.TOMBSTONE, tombstoneBytes);
+            protoStream.write(
+                    TombstoneWithHeadersProto.DROPPED_COUNT,
+                    rateLimitResult.droppedCountSinceRateLimitActivated());
+            protoStream.flush();
+
+            // Add the proto to dropbox.
+            db.addFile(TAG_TOMBSTONE_PROTO_WITH_HEADERS, tombstoneProtoWithHeaders, 0);
+        } catch (FileNotFoundException ex) {
+            Slog.e(TAG, "failed to open for write: " + tombstoneProtoWithHeaders, ex);
+            throw ex;
+        } catch (IOException ex) {
+            Slog.e(TAG, "IO exception during write: " + tombstoneProtoWithHeaders, ex);
+        } finally {
+            // Remove the temporary file and unlock the lock.
+            if (tombstoneProtoWithHeaders != null) {
+                tombstoneProtoWithHeaders.delete();
+            }
+        }
+    }
+
     private static void addLastkToDropBox(
             DropBoxManager db, HashMap<String, Long> timestamps,
             String headers, String footers, String filename, int maxSize,
diff --git a/services/core/java/com/android/server/os/NativeTombstoneManager.java b/services/core/java/com/android/server/os/NativeTombstoneManager.java
index e5616d0..ab0d0d2 100644
--- a/services/core/java/com/android/server/os/NativeTombstoneManager.java
+++ b/services/core/java/com/android/server/os/NativeTombstoneManager.java
@@ -61,6 +61,7 @@
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.locks.ReentrantLock;
 
 /**
  * A class to manage native tombstones.
@@ -74,6 +75,8 @@
     private final Handler mHandler;
     private final TombstoneWatcher mWatcher;
 
+    private final ReentrantLock mTmpFileLock = new ReentrantLock();
+
     private final Object mLock = new Object();
 
     @GuardedBy("mLock")
@@ -112,7 +115,12 @@
 
         // Clean up temporary files if they made it this far (e.g. if system server crashes).
         if (filename.endsWith(".tmp")) {
-            path.delete();
+            mTmpFileLock.lock();
+            try {
+                path.delete();
+            } finally {
+                mTmpFileLock.unlock();
+            }
             return;
         }
 
@@ -128,7 +136,7 @@
         if (parsedTombstone.isPresent()) {
             processName = parsedTombstone.get().getProcessName();
         }
-        BootReceiver.addTombstoneToDropBox(mContext, path, isProtoFile, processName);
+        BootReceiver.addTombstoneToDropBox(mContext, path, isProtoFile, processName, mTmpFileLock);
     }
 
     private Optional<TombstoneFile> handleProtoTombstone(File path, boolean addToList) {