diff --git a/audio/aidl/common/include/Utils.h b/audio/aidl/common/include/Utils.h
index 305c924..652d63c 100644
--- a/audio/aidl/common/include/Utils.h
+++ b/audio/aidl/common/include/Utils.h
@@ -111,30 +111,6 @@
            device == ::aidl::android::media::audio::common::AudioDeviceType::OUT_TELEPHONY_TX;
 }
 
-constexpr bool isUsbInputDeviceType(::aidl::android::media::audio::common::AudioDeviceType type) {
-    switch (type) {
-        case ::aidl::android::media::audio::common::AudioDeviceType::IN_DOCK:
-        case ::aidl::android::media::audio::common::AudioDeviceType::IN_ACCESSORY:
-        case ::aidl::android::media::audio::common::AudioDeviceType::IN_DEVICE:
-        case ::aidl::android::media::audio::common::AudioDeviceType::IN_HEADSET:
-            return true;
-        default:
-            return false;
-    }
-}
-
-constexpr bool isUsbOutputtDeviceType(::aidl::android::media::audio::common::AudioDeviceType type) {
-    switch (type) {
-        case ::aidl::android::media::audio::common::AudioDeviceType::OUT_DOCK:
-        case ::aidl::android::media::audio::common::AudioDeviceType::OUT_ACCESSORY:
-        case ::aidl::android::media::audio::common::AudioDeviceType::OUT_DEVICE:
-        case ::aidl::android::media::audio::common::AudioDeviceType::OUT_HEADSET:
-            return true;
-        default:
-            return false;
-    }
-}
-
 constexpr bool isValidAudioMode(::aidl::android::media::audio::common::AudioMode mode) {
     return std::find(kValidAudioModes.begin(), kValidAudioModes.end(), mode) !=
            kValidAudioModes.end();
diff --git a/audio/aidl/default/usb/ModuleUsb.cpp b/audio/aidl/default/usb/ModuleUsb.cpp
index ecdbd5c..28116ae 100644
--- a/audio/aidl/default/usb/ModuleUsb.cpp
+++ b/audio/aidl/default/usb/ModuleUsb.cpp
@@ -30,13 +30,13 @@
 #include "alsa_device_profile.h"
 }
 
-using aidl::android::hardware::audio::common::isUsbInputDeviceType;
 using aidl::android::media::audio::common::AudioChannelLayout;
 using aidl::android::media::audio::common::AudioDeviceAddress;
 using aidl::android::media::audio::common::AudioDeviceDescription;
 using aidl::android::media::audio::common::AudioDeviceType;
 using aidl::android::media::audio::common::AudioFormatDescription;
 using aidl::android::media::audio::common::AudioFormatType;
+using aidl::android::media::audio::common::AudioIoFlags;
 using aidl::android::media::audio::common::AudioPort;
 using aidl::android::media::audio::common::AudioPortConfig;
 using aidl::android::media::audio::common::AudioPortExt;
@@ -117,7 +117,7 @@
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
     }
 
-    const bool isInput = isUsbInputDeviceType(devicePort.device.type.type);
+    const bool isInput = audioPort->flags.getTag() == AudioIoFlags::input;
     alsa_device_profile profile;
     profile_init(&profile, isInput ? PCM_IN : PCM_OUT);
     profile.card = alsaAddress[0];
diff --git a/bluetooth/aidl/TEST_MAPPING b/bluetooth/aidl/TEST_MAPPING
index d1de251..18958d2 100644
--- a/bluetooth/aidl/TEST_MAPPING
+++ b/bluetooth/aidl/TEST_MAPPING
@@ -1,24 +1,12 @@
 {
   "presubmit" : [
     {
-      "name" : "VtsHalBluetoothTargetTest",
-      "options": [
-        {
-          // TODO(b/275847929)
-          "exclude-filter": "VtsHalBluetoothTargetTest.PerInstance/BluetoothAidlTest#Cdd_C_12_1_Bluetooth5Requirements/0_android_hardware_bluetooth_IBluetoothHci_default"
-        }
-      ]
+      "name" : "VtsHalBluetoothTargetTest"
     }
   ],
   "hwasan-presubmit" : [
     {
-      "name" : "VtsHalBluetoothTargetTest",
-      "options": [
-        {
-          // TODO(b/275847929)
-          "exclude-filter": "VtsHalBluetoothTargetTest.PerInstance/BluetoothAidlTest#Cdd_C_12_1_Bluetooth5Requirements/0_android_hardware_bluetooth_IBluetoothHci_default"
-        }
-      ]
+      "name" : "VtsHalBluetoothTargetTest"
     }
   ]
 }
diff --git a/bluetooth/aidl/default/BluetoothHci.cpp b/bluetooth/aidl/default/BluetoothHci.cpp
index ac2eabc..18a371d 100644
--- a/bluetooth/aidl/default/BluetoothHci.cpp
+++ b/bluetooth/aidl/default/BluetoothHci.cpp
@@ -174,7 +174,10 @@
   mFdWatcher.WatchFdForNonBlockingReads(mFd,
                                         [this](int) { mH4->OnDataReady(); });
 
-  send(PacketType::COMMAND, reset);
+  ndk::ScopedAStatus result = send(PacketType::COMMAND, reset);
+  if (!result.isOk()) {
+    ALOGE("Error sending reset command");
+  }
   auto status = resetFuture.wait_for(std::chrono::seconds(1));
   mFdWatcher.StopWatchingFileDescriptors();
   if (status == std::future_status::ready) {
@@ -301,30 +304,35 @@
 
 ndk::ScopedAStatus BluetoothHci::sendHciCommand(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::COMMAND, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::COMMAND, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendAclData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::ACL_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::ACL_DATA, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendScoData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::SCO_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::SCO_DATA, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendIsoData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::ISO_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::ISO_DATA, packet);
 }
 
-void BluetoothHci::send(PacketType type, const std::vector<uint8_t>& v) {
+ndk::ScopedAStatus BluetoothHci::send(PacketType type,
+    const std::vector<uint8_t>& v) {
+  if (mH4 == nullptr) {
+    return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+  }
+  if (v.empty()) {
+    ALOGE("Packet is empty, no data was found to be sent");
+    return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+  }
   mH4->Send(type, v);
+  return ndk::ScopedAStatus::ok();
 }
 
 }  // namespace aidl::android::hardware::bluetooth::impl
diff --git a/bluetooth/aidl/default/BluetoothHci.h b/bluetooth/aidl/default/BluetoothHci.h
index 85aafc8..477cc5c 100644
--- a/bluetooth/aidl/default/BluetoothHci.h
+++ b/bluetooth/aidl/default/BluetoothHci.h
@@ -66,8 +66,9 @@
   ::android::hardware::bluetooth::async::AsyncFdWatcher mFdWatcher;
 
   int getFdFromDevPath();
-  void send(::android::hardware::bluetooth::hci::PacketType type,
-            const std::vector<uint8_t>& packet);
+  [[nodiscard]] ndk::ScopedAStatus send(
+      ::android::hardware::bluetooth::hci::PacketType type,
+      const std::vector<uint8_t>& packet);
   std::unique_ptr<NetBluetoothMgmt> management_{};
 
   // Send a reset command and discard all packets until a reset is received.
diff --git a/bluetooth/hci/h4_protocol.cc b/bluetooth/hci/h4_protocol.cc
index 51a624f..5f6d86e 100644
--- a/bluetooth/hci/h4_protocol.cc
+++ b/bluetooth/hci/h4_protocol.cc
@@ -105,15 +105,12 @@
       buffer_offset += 1;
     } else {
       bool packet_ready = hci_packetizer_.OnDataReady(
-          hci_packet_type_, input_buffer, buffer_offset);
+          hci_packet_type_, input_buffer, &buffer_offset);
       if (packet_ready) {
-        // Call packet callback and move offset.
-        buffer_offset += OnPacketReady(hci_packetizer_.GetPacket());
+        // Call packet callback.
+        OnPacketReady(hci_packetizer_.GetPacket());
         // Get ready for the next type byte.
         hci_packet_type_ = PacketType::UNKNOWN;
-      } else {
-        // The data was consumed, but there wasn't a packet.
-        buffer_offset = input_buffer.size();
       }
     }
   }
diff --git a/bluetooth/hci/hci_packetizer.cc b/bluetooth/hci/hci_packetizer.cc
index 5b6c443..4135920 100644
--- a/bluetooth/hci/hci_packetizer.cc
+++ b/bluetooth/hci/hci_packetizer.cc
@@ -51,9 +51,10 @@
 
 bool HciPacketizer::OnDataReady(PacketType packet_type,
                                 const std::vector<uint8_t>& buffer,
-                                size_t offset) {
+                                size_t* offset) {
   bool packet_completed = false;
-  size_t bytes_available = buffer.size() - offset;
+  size_t bytes_available = buffer.size() - *offset;
+
   switch (state_) {
     case HCI_HEADER: {
       size_t header_size =
@@ -62,18 +63,20 @@
         bytes_remaining_ = header_size;
         packet_.clear();
       }
+
       size_t bytes_to_copy = std::min(bytes_remaining_, bytes_available);
-      packet_.insert(packet_.end(), buffer.begin() + offset,
-                     buffer.begin() + offset + bytes_to_copy);
+      packet_.insert(packet_.end(), buffer.begin() + *offset,
+                     buffer.begin() + *offset + bytes_to_copy);
       bytes_remaining_ -= bytes_to_copy;
       bytes_available -= bytes_to_copy;
+      *offset += bytes_to_copy;
+
       if (bytes_remaining_ == 0) {
         bytes_remaining_ = HciGetPacketLengthForType(packet_type, packet_);
         if (bytes_remaining_ > 0) {
           state_ = HCI_PAYLOAD;
           if (bytes_available > 0) {
-            packet_completed =
-                OnDataReady(packet_type, buffer, offset + bytes_to_copy);
+            packet_completed = OnDataReady(packet_type, buffer, offset);
           }
         } else {
           packet_completed = true;
@@ -84,9 +87,10 @@
 
     case HCI_PAYLOAD: {
       size_t bytes_to_copy = std::min(bytes_remaining_, bytes_available);
-      packet_.insert(packet_.end(), buffer.begin() + offset,
-                     buffer.begin() + offset + bytes_to_copy);
+      packet_.insert(packet_.end(), buffer.begin() + *offset,
+                     buffer.begin() + *offset + bytes_to_copy);
       bytes_remaining_ -= bytes_to_copy;
+      *offset += bytes_to_copy;
       if (bytes_remaining_ == 0) {
         state_ = HCI_HEADER;
         packet_completed = true;
@@ -94,6 +98,7 @@
       break;
     }
   }
+
   return packet_completed;
 }
 
diff --git a/bluetooth/hci/hci_packetizer.h b/bluetooth/hci/hci_packetizer.h
index ba3e841..0d9319f 100644
--- a/bluetooth/hci/hci_packetizer.h
+++ b/bluetooth/hci/hci_packetizer.h
@@ -28,7 +28,7 @@
  public:
   HciPacketizer() = default;
   bool OnDataReady(PacketType packet_type, const std::vector<uint8_t>& data,
-                   size_t offset);
+                   size_t* offset);
   const std::vector<uint8_t>& GetPacket() const;
 
  protected:
diff --git a/bluetooth/hci/test/h4_protocol_unittest.cc b/bluetooth/hci/test/h4_protocol_unittest.cc
index d3fab61..f0c49b5 100644
--- a/bluetooth/hci/test/h4_protocol_unittest.cc
+++ b/bluetooth/hci/test/h4_protocol_unittest.cc
@@ -31,7 +31,6 @@
 #include <vector>
 
 #include "async_fd_watcher.h"
-#include "log/log.h"
 
 using android::hardware::bluetooth::async::AsyncFdWatcher;
 using namespace android::hardware::bluetooth::hci;
@@ -49,6 +48,7 @@
 static char event_data[100] = "The edges of a surface are lines.";
 static char iso_data[100] =
     "A plane angle is the inclination to one another of two lines in a ...";
+static char short_payload[10] = "12345";
 
 // 5 seconds.  Just don't hang.
 static constexpr size_t kTimeoutMs = 5000;
@@ -225,6 +225,49 @@
     CallDataReady();
   }
 
+  void WriteAndExpectManyAclDataPacketsDifferentOffsetsShort() {
+    std::promise<void> last_packet_promise;
+    size_t kNumPackets = 30;
+    // h4 type[1] + handle[2] + size[2]
+    char preamble[5] = {static_cast<uint8_t>(PacketType::ACL_DATA), 19, 92, 0,
+                        0};
+    int length = strlen(short_payload);
+    preamble[3] = length & 0xFF;
+    preamble[4] = 0;
+
+    EXPECT_CALL(acl_cb_, Call(PacketMatches(preamble + 1, kAclHeaderSize,
+                                            short_payload)))
+        .Times(kNumPackets);
+    ExpectInboundEvent(event_data, &last_packet_promise);
+
+    char all_packets[kNumPackets * 10];
+    size_t total_bytes = 0;
+
+    for (size_t packet = 0; packet < kNumPackets; packet++) {
+      for (size_t i = 0; i < sizeof(preamble); i++) {
+        all_packets[total_bytes++] = preamble[i];
+      }
+      for (size_t i = 0; i < length; i++) {
+        all_packets[total_bytes++] = short_payload[i];
+      }
+    }
+
+    size_t written_bytes = 0;
+    size_t partial_size = 1;
+    while (written_bytes < total_bytes) {
+      size_t to_write = std::min(partial_size, total_bytes - written_bytes);
+      TEMP_FAILURE_RETRY(
+          write(chip_uart_fd_, all_packets + written_bytes, to_write));
+      written_bytes += to_write;
+      CallDataReady();
+      partial_size++;
+      partial_size = partial_size % 5 + 1;
+    }
+    WriteInboundEvent(event_data);
+    CallDataReady();
+    WaitForTimeout(&last_packet_promise);
+  }
+
   testing::MockFunction<void(const std::vector<uint8_t>&)> cmd_cb_;
   testing::MockFunction<void(const std::vector<uint8_t>&)> event_cb_;
   testing::MockFunction<void(const std::vector<uint8_t>&)> acl_cb_;
@@ -276,6 +319,10 @@
   WriteAndExpectManyInboundAclDataPackets(sco_data);
 }
 
+TEST_F(H4ProtocolTest, TestMultipleWritesPacketsShortWrites) {
+  WriteAndExpectManyAclDataPacketsDifferentOffsetsShort();
+}
+
 TEST_F(H4ProtocolTest, TestDisconnect) {
   EXPECT_CALL(disconnect_cb_, Call());
   close(chip_uart_fd_);
@@ -332,10 +379,8 @@
 
   void TearDown() override { fd_watcher_.StopWatchingFileDescriptors(); }
 
-  void CallDataReady() override {
-    // The Async test can't call data ready.
-    FAIL();
-  }
+  // Calling CallDataReady() has no effect in the AsyncTest
+  void CallDataReady() override {}
 
   void SendAndReadUartOutbound(PacketType type, char* data) {
     ALOGD("%s sending", __func__);
@@ -434,6 +479,10 @@
   WriteAndExpectManyInboundAclDataPackets(sco_data);
 }
 
+TEST_F(H4ProtocolAsyncTest, TestMultipleWritesPacketsShortWrites) {
+  WriteAndExpectManyAclDataPacketsDifferentOffsetsShort();
+}
+
 TEST_F(H4ProtocolAsyncTest, TestDisconnect) {
   std::promise<void> promise;
   EXPECT_CALL(disconnect_cb_, Call()).WillOnce(Notify(&promise));
diff --git a/compatibility_matrices/Android.bp b/compatibility_matrices/Android.bp
index 93b5380..b3ca293 100644
--- a/compatibility_matrices/Android.bp
+++ b/compatibility_matrices/Android.bp
@@ -82,3 +82,15 @@
         "kernel_config_u_6.1",
     ],
 }
+
+vintf_compatibility_matrix {
+    name: "framework_compatibility_matrix.9.xml",
+    stem: "compatibility_matrix.9.xml",
+    srcs: [
+        "compatibility_matrix.9.xml",
+    ],
+    kernel_configs: [
+        "kernel_config_v_5.15",
+        "kernel_config_v_6.1",
+    ],
+}
diff --git a/compatibility_matrices/Android.mk b/compatibility_matrices/Android.mk
index 6e4c419..a82a421 100644
--- a/compatibility_matrices/Android.mk
+++ b/compatibility_matrices/Android.mk
@@ -103,6 +103,7 @@
     framework_compatibility_matrix.6.xml \
     framework_compatibility_matrix.7.xml \
     framework_compatibility_matrix.8.xml \
+    framework_compatibility_matrix.9.xml \
     framework_compatibility_matrix.device.xml \
 
 my_framework_matrix_deps += \
diff --git a/compatibility_matrices/compatibility_matrix.9.xml b/compatibility_matrices/compatibility_matrix.9.xml
index 188746d..f9b795e 100644
--- a/compatibility_matrices/compatibility_matrix.9.xml
+++ b/compatibility_matrices/compatibility_matrix.9.xml
@@ -1,4 +1,3 @@
-<!-- WARNING: This file is unused in the Android 14 branch. -->
 <compatibility-matrix version="1.0" type="framework" level="9">
     <hal format="hidl" optional="true">
         <name>android.hardware.audio</name>
@@ -493,16 +492,6 @@
         </interface>
     </hal>
     <hal format="aidl" optional="true">
-        <name>android.hardware.radio.satellite</name>
-        <version>1</version>
-        <interface>
-            <name>IRadioSatellite</name>
-            <instance>slot1</instance>
-            <instance>slot2</instance>
-            <instance>slot3</instance>
-        </interface>
-    </hal>
-    <hal format="aidl" optional="true">
         <name>android.hardware.radio.ims.media</name>
         <version>1</version>
         <interface>
@@ -510,14 +499,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.renderscript</name>
-        <version>1.0</version>
-        <interface>
-            <name>IDevice</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.rebootescrow</name>
         <version>1</version>
diff --git a/drm/1.3/vts/OWNERS b/drm/1.3/vts/OWNERS
index 3a0672e..744827c 100644
--- a/drm/1.3/vts/OWNERS
+++ b/drm/1.3/vts/OWNERS
@@ -1,9 +1,11 @@
+# Bug component: 49079
 conglin@google.com
-edwinwong@google.com
 fredgc@google.com
-jtinker@google.com
 juce@google.com
+kelzhan@google.com
 kylealexander@google.com
+mattfedd@google.com
 rfrias@google.com
 robertshih@google.com
 sigquit@google.com
+vickymin@google.com
\ No newline at end of file
diff --git a/gnss/aidl/OWNERS b/gnss/aidl/OWNERS
index b7b4a2e..e5b585e 100644
--- a/gnss/aidl/OWNERS
+++ b/gnss/aidl/OWNERS
@@ -1,3 +1,5 @@
+# Bug component: 393449
+
 gomo@google.com
 smalkos@google.com
 wyattriley@google.com
diff --git a/health/storage/aidl/vts/functional/OWNERS b/health/storage/aidl/vts/functional/OWNERS
new file mode 100644
index 0000000..a15ed7c
--- /dev/null
+++ b/health/storage/aidl/vts/functional/OWNERS
@@ -0,0 +1,2 @@
+# Bug component: 30545
+file:platform/hardware/interfaces:/health/aidl/OWNERS
\ No newline at end of file
diff --git a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
index e759123..c035f19 100644
--- a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
+++ b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
@@ -88,96 +88,9 @@
 class AttestKeyTest : public KeyMintAidlTestBase {
   public:
     void SetUp() override {
-        check_skip_test();
+        skipAttestKeyTest();
         KeyMintAidlTestBase::SetUp();
     }
-
-  protected:
-    const string FEATURE_KEYSTORE_APP_ATTEST_KEY = "android.hardware.keystore.app_attest_key";
-
-    const string FEATURE_STRONGBOX_KEYSTORE = "android.hardware.strongbox_keystore";
-
-    ErrorCode GenerateAttestKey(const AuthorizationSet& key_desc,
-                                const optional<AttestationKey>& attest_key,
-                                vector<uint8_t>* key_blob,
-                                vector<KeyCharacteristics>* key_characteristics,
-                                vector<Certificate>* cert_chain) {
-        // The original specification for KeyMint v1 required ATTEST_KEY not be combined
-        // with any other key purpose, but the original VTS tests incorrectly did exactly that.
-        // This means that a device that launched prior to Android T (API level 33) may
-        // accept or even require KeyPurpose::SIGN too.
-        if (property_get_int32("ro.board.first_api_level", 0) < __ANDROID_API_T__) {
-            AuthorizationSet key_desc_plus_sign = key_desc;
-            key_desc_plus_sign.push_back(TAG_PURPOSE, KeyPurpose::SIGN);
-
-            auto result = GenerateKey(key_desc_plus_sign, attest_key, key_blob, key_characteristics,
-                                      cert_chain);
-            if (result == ErrorCode::OK) {
-                return result;
-            }
-            // If the key generation failed, it may be because the device is (correctly)
-            // rejecting the combination of ATTEST_KEY+SIGN.  Fall through to try again with
-            // just ATTEST_KEY.
-        }
-        return GenerateKey(key_desc, attest_key, key_blob, key_characteristics, cert_chain);
-    }
-
-    // Check if ATTEST_KEY feature is disabled
-    bool is_attest_key_feature_disabled(void) const {
-        if (!check_feature(FEATURE_KEYSTORE_APP_ATTEST_KEY)) {
-            GTEST_LOG_(INFO) << "Feature " + FEATURE_KEYSTORE_APP_ATTEST_KEY + " is disabled";
-            return true;
-        }
-
-        return false;
-    }
-
-    // Check if StrongBox KeyStore is enabled
-    bool is_strongbox_enabled(void) const {
-        if (check_feature(FEATURE_STRONGBOX_KEYSTORE)) {
-            GTEST_LOG_(INFO) << "Feature " + FEATURE_STRONGBOX_KEYSTORE + " is enabled";
-            return true;
-        }
-
-        return false;
-    }
-
-    // Check if chipset has received a waiver allowing it to be launched with Android S or T with
-    // Keymaster 4.0 in StrongBox.
-    bool is_chipset_allowed_km4_strongbox(void) const {
-        std::array<char, PROPERTY_VALUE_MAX> buffer;
-
-        const int32_t first_api_level = property_get_int32("ro.board.first_api_level", 0);
-        if (first_api_level <= 0 || first_api_level > __ANDROID_API_T__) return false;
-
-        auto res = property_get("ro.vendor.qti.soc_model", buffer.data(), nullptr);
-        if (res <= 0) return false;
-
-        const string allowed_soc_models[] = {"SM8450", "SM8475", "SM8550", "SXR2230P"};
-
-        for (const string model : allowed_soc_models) {
-            if (model.compare(buffer.data()) == 0) {
-                GTEST_LOG_(INFO) << "QTI SOC Model " + model + " is allowed SB KM 4.0";
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    // Skip the test if all the following conditions hold:
-    // 1. ATTEST_KEY feature is disabled
-    // 2. STRONGBOX is enabled
-    // 3. The device is running one of the chipsets that have received a waiver
-    //     allowing it to be launched with Android S (or later) with Keymaster 4.0
-    //     in StrongBox
-    void check_skip_test(void) const {
-        // Check the chipset first as that doesn't require a round-trip to Package Manager.
-        if (is_chipset_allowed_km4_strongbox() && is_strongbox_enabled() &&
-            is_attest_key_feature_disabled()) {
-            GTEST_SKIP() << "Test is not applicable";
-        }
-    }
 };
 
 /*
diff --git a/security/keymint/aidl/vts/functional/BootloaderStateTest.cpp b/security/keymint/aidl/vts/functional/BootloaderStateTest.cpp
index 723edee..dff0498 100644
--- a/security/keymint/aidl/vts/functional/BootloaderStateTest.cpp
+++ b/security/keymint/aidl/vts/functional/BootloaderStateTest.cpp
@@ -34,20 +34,13 @@
 
 // Since this test needs to talk to KeyMint HAL, it can only run as root. Thus,
 // bootloader can not be locked.
-class BootloaderStateTest : public testing::TestWithParam<std::string> {
-  public:
-    virtual void SetUp() override {
-        ::ndk::SpAIBinder binder(AServiceManager_waitForService(GetParam().c_str()));
-        keyMint_ = IKeyMintDevice::fromBinder(binder);
-        ASSERT_TRUE(keyMint_) << "Failed to get KM device";
-    }
-
-    std::shared_ptr<IKeyMintDevice> keyMint_;
-};
+class BootloaderStateTest : public KeyMintAidlTestBase {};
 
 // Check that attested bootloader state is set to unlocked.
 TEST_P(BootloaderStateTest, IsUnlocked) {
     // Generate a key with attestation.
+    vector<uint8_t> key_blob;
+    vector<KeyCharacteristics> key_characteristics;
     AuthorizationSet keyDesc = AuthorizationSetBuilder()
                                        .Authorization(TAG_NO_AUTH_REQUIRED)
                                        .EcdsaSigningKey(EcCurve::P_256)
@@ -55,15 +48,23 @@
                                        .AttestationApplicationId("bar")
                                        .Digest(Digest::NONE)
                                        .SetDefaultValidity();
-    KeyCreationResult creationResult;
-    auto kmStatus = keyMint_->generateKey(keyDesc.vector_data(), std::nullopt, &creationResult);
-    ASSERT_TRUE(kmStatus.isOk());
-
-    vector<Certificate> key_cert_chain = std::move(creationResult.certificateChain);
+    auto result = GenerateKey(keyDesc, &key_blob, &key_characteristics);
+    // If factory provisioned attestation key is not supported by Strongbox,
+    // then create a key with self-signed attestation and use it as the
+    // attestation key instead.
+    if (SecLevel() == SecurityLevel::STRONGBOX &&
+        result == ErrorCode::ATTESTATION_KEYS_NOT_PROVISIONED) {
+        result = GenerateKeyWithSelfSignedAttestKey(
+                AuthorizationSetBuilder()
+                        .EcdsaKey(EcCurve::P_256)
+                        .AttestKey()
+                        .SetDefaultValidity(), /* attest key params */
+                keyDesc, &key_blob, &key_characteristics);
+    }
+    ASSERT_EQ(ErrorCode::OK, result);
 
     // Parse attested AVB values.
-    const auto& attestation_cert = key_cert_chain[0].encodedCertificate;
-    X509_Ptr cert(parse_cert_blob(attestation_cert));
+    X509_Ptr cert(parse_cert_blob(cert_chain_[0].encodedCertificate));
     ASSERT_TRUE(cert.get());
 
     ASN1_OCTET_STRING* attest_rec = get_attestation_record(cert.get());
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
index 5e27bd0..a8ea407 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.cpp
@@ -322,12 +322,13 @@
         const AuthorizationSet& attest_key_desc, const AuthorizationSet& key_desc,
         vector<uint8_t>* key_blob, vector<KeyCharacteristics>* key_characteristics,
         vector<Certificate>* cert_chain) {
+    skipAttestKeyTest();
     AttestationKey attest_key;
     vector<Certificate> attest_cert_chain;
     vector<KeyCharacteristics> attest_key_characteristics;
     // Generate a key with self signed attestation.
-    auto error = GenerateKey(attest_key_desc, std::nullopt, &attest_key.keyBlob,
-                             &attest_key_characteristics, &attest_cert_chain);
+    auto error = GenerateAttestKey(attest_key_desc, std::nullopt, &attest_key.keyBlob,
+                                   &attest_key_characteristics, &attest_cert_chain);
     if (error != ErrorCode::OK) {
         return error;
     }
@@ -1548,6 +1549,88 @@
     return result;
 }
 
+ErrorCode KeyMintAidlTestBase::GenerateAttestKey(const AuthorizationSet& key_desc,
+                                                 const optional<AttestationKey>& attest_key,
+                                                 vector<uint8_t>* key_blob,
+                                                 vector<KeyCharacteristics>* key_characteristics,
+                                                 vector<Certificate>* cert_chain) {
+    // The original specification for KeyMint v1 required ATTEST_KEY not be combined
+    // with any other key purpose, but the original VTS tests incorrectly did exactly that.
+    // This means that a device that launched prior to Android T (API level 33) may
+    // accept or even require KeyPurpose::SIGN too.
+    if (property_get_int32("ro.board.first_api_level", 0) < __ANDROID_API_T__) {
+        AuthorizationSet key_desc_plus_sign = key_desc;
+        key_desc_plus_sign.push_back(TAG_PURPOSE, KeyPurpose::SIGN);
+
+        auto result = GenerateKey(key_desc_plus_sign, attest_key, key_blob, key_characteristics,
+                                  cert_chain);
+        if (result == ErrorCode::OK) {
+            return result;
+        }
+        // If the key generation failed, it may be because the device is (correctly)
+        // rejecting the combination of ATTEST_KEY+SIGN.  Fall through to try again with
+        // just ATTEST_KEY.
+    }
+    return GenerateKey(key_desc, attest_key, key_blob, key_characteristics, cert_chain);
+}
+
+// Check if ATTEST_KEY feature is disabled
+bool KeyMintAidlTestBase::is_attest_key_feature_disabled(void) const {
+    if (!check_feature(FEATURE_KEYSTORE_APP_ATTEST_KEY)) {
+        GTEST_LOG_(INFO) << "Feature " + FEATURE_KEYSTORE_APP_ATTEST_KEY + " is disabled";
+        return true;
+    }
+
+    return false;
+}
+
+// Check if StrongBox KeyStore is enabled
+bool KeyMintAidlTestBase::is_strongbox_enabled(void) const {
+    if (check_feature(FEATURE_STRONGBOX_KEYSTORE)) {
+        GTEST_LOG_(INFO) << "Feature " + FEATURE_STRONGBOX_KEYSTORE + " is enabled";
+        return true;
+    }
+
+    return false;
+}
+
+// Check if chipset has received a waiver allowing it to be launched with Android S or T with
+// Keymaster 4.0 in StrongBox.
+bool KeyMintAidlTestBase::is_chipset_allowed_km4_strongbox(void) const {
+    std::array<char, PROPERTY_VALUE_MAX> buffer;
+
+    const int32_t first_api_level = property_get_int32("ro.board.first_api_level", 0);
+    if (first_api_level <= 0 || first_api_level > __ANDROID_API_T__) return false;
+
+    auto res = property_get("ro.vendor.qti.soc_model", buffer.data(), nullptr);
+    if (res <= 0) return false;
+
+    const string allowed_soc_models[] = {"SM8450", "SM8475", "SM8550", "SXR2230P"};
+
+    for (const string model : allowed_soc_models) {
+        if (model.compare(buffer.data()) == 0) {
+            GTEST_LOG_(INFO) << "QTI SOC Model " + model + " is allowed SB KM 4.0";
+            return true;
+        }
+    }
+
+    return false;
+}
+
+// Skip the test if all the following conditions hold:
+// 1. ATTEST_KEY feature is disabled
+// 2. STRONGBOX is enabled
+// 3. The device is running one of the chipsets that have received a waiver
+//     allowing it to be launched with Android S (or later) with Keymaster 4.0
+//     in StrongBox
+void KeyMintAidlTestBase::skipAttestKeyTest(void) const {
+    // Check the chipset first as that doesn't require a round-trip to Package Manager.
+    if (is_chipset_allowed_km4_strongbox() && is_strongbox_enabled() &&
+        is_attest_key_feature_disabled()) {
+        GTEST_SKIP() << "Test is not applicable";
+    }
+}
+
 void verify_serial(X509* cert, const uint64_t expected_serial) {
     BIGNUM_Ptr ser(BN_new());
     EXPECT_TRUE(ASN1_INTEGER_to_BN(X509_get_serialNumber(cert), ser.get()));
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
index 3245ca9..30ac452 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
@@ -54,6 +54,9 @@
 
 constexpr uint64_t kOpHandleSentinel = 0xFFFFFFFFFFFFFFFF;
 
+const string FEATURE_KEYSTORE_APP_ATTEST_KEY = "android.hardware.keystore.app_attest_key";
+const string FEATURE_STRONGBOX_KEYSTORE = "android.hardware.strongbox_keystore";
+
 class KeyMintAidlTestBase : public ::testing::TestWithParam<string> {
   public:
     struct KeyData {
@@ -347,6 +350,17 @@
     ErrorCode UseRsaKey(const vector<uint8_t>& rsaKeyBlob);
     ErrorCode UseEcdsaKey(const vector<uint8_t>& ecdsaKeyBlob);
 
+    ErrorCode GenerateAttestKey(const AuthorizationSet& key_desc,
+                                const optional<AttestationKey>& attest_key,
+                                vector<uint8_t>* key_blob,
+                                vector<KeyCharacteristics>* key_characteristics,
+                                vector<Certificate>* cert_chain);
+
+    bool is_attest_key_feature_disabled(void) const;
+    bool is_strongbox_enabled(void) const;
+    bool is_chipset_allowed_km4_strongbox(void) const;
+    void skipAttestKeyTest(void) const;
+
   protected:
     std::shared_ptr<IKeyMintDevice> keymint_;
     uint32_t os_version_;
diff --git a/security/keymint/aidl/vts/functional/KeyMintTest.cpp b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
index e99149b..bdec4d3 100644
--- a/security/keymint/aidl/vts/functional/KeyMintTest.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
@@ -3119,7 +3119,7 @@
  */
 TEST_P(SigningOperationsTest, NoUserConfirmation) {
     ASSERT_EQ(ErrorCode::OK, GenerateKey(AuthorizationSetBuilder()
-                                                 .RsaSigningKey(1024, 65537)
+                                                 .RsaSigningKey(2048, 65537)
                                                  .Digest(Digest::NONE)
                                                  .Padding(PaddingMode::NONE)
                                                  .Authorization(TAG_NO_AUTH_REQUIRED)
diff --git a/uwb/aidl/default/src/uwb_chip.rs b/uwb/aidl/default/src/uwb_chip.rs
index 7c2c300..cf32694 100644
--- a/uwb/aidl/default/src/uwb_chip.rs
+++ b/uwb/aidl/default/src/uwb_chip.rs
@@ -6,8 +6,8 @@
 use async_trait::async_trait;
 use binder::{Result, Strong};
 
-use tokio::fs::File;
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
+use tokio::fs::{self, File};
+use tokio::io::AsyncReadExt;
 use tokio::sync::Mutex;
 
 use std::os::fd::AsRawFd;
@@ -22,7 +22,6 @@
         callbacks: Strong<dyn IUwbClientCallback>,
         #[allow(dead_code)]
         tasks: tokio::task::JoinSet<()>,
-        write: File,
     },
 }
 
@@ -65,17 +64,11 @@
     async fn open(&self, callbacks: &Strong<dyn IUwbClientCallback>) -> Result<()> {
         log::debug!("open: {:?}", &self.path);
 
-        let serial = File::open(&self.path)
+        let mut serial = File::open(&self.path)
             .await
             .and_then(makeraw)
             .map_err(|_| binder::StatusCode::UNKNOWN_ERROR)?;
 
-        let mut read = serial
-            .try_clone()
-            .await
-            .map_err(|_| binder::StatusCode::UNKNOWN_ERROR)?;
-        let write = serial;
-
         let mut state = self.state.lock().await;
 
         if let State::Closed = *state {
@@ -88,14 +81,16 @@
                     const UWB_HEADER_SIZE: usize = 4;
 
                     let mut buffer = vec![0; UWB_HEADER_SIZE];
-                    read.read_exact(&mut buffer[0..UWB_HEADER_SIZE])
+                    serial
+                        .read_exact(&mut buffer[0..UWB_HEADER_SIZE])
                         .await
                         .unwrap();
 
                     let length = buffer[3] as usize + UWB_HEADER_SIZE;
 
                     buffer.resize(length, 0);
-                    read.read_exact(&mut buffer[UWB_HEADER_SIZE..length])
+                    serial
+                        .read_exact(&mut buffer[UWB_HEADER_SIZE..length])
                         .await
                         .unwrap();
 
@@ -108,7 +103,6 @@
             *state = State::Opened {
                 callbacks: callbacks.clone(),
                 tasks,
-                write,
             };
 
             Ok(())
@@ -155,11 +149,10 @@
     async fn sendUciMessage(&self, data: &[u8]) -> Result<i32> {
         log::debug!("sendUciMessage");
 
-        if let State::Opened { write, .. } = &mut *self.state.lock().await {
-            write
-                .write(data)
+        if let State::Opened { .. } = &mut *self.state.lock().await {
+            fs::write(&self.path, data)
                 .await
-                .map(|written| written as i32)
+                .map(|_| data.len() as i32)
                 .map_err(|_| binder::StatusCode::UNKNOWN_ERROR.into())
         } else {
             Err(binder::ExceptionCode::ILLEGAL_STATE.into())