diff --git a/libs/binder/Debug.h b/libs/binder/Debug.h
index 68d811b..7ca087e 100644
--- a/libs/binder/Debug.h
+++ b/libs/binder/Debug.h
@@ -37,8 +37,7 @@
     size_t alignment=0, bool cArrayStyle=false,
     debugPrintFunc func = nullptr, void* cookie = nullptr);
 
-
-ssize_t getBinderKernelReferences(size_t count, uintptr_t* buf);
+extern "C" ssize_t getBinderKernelReferences(size_t count, uintptr_t* buf);
 
 // ---------------------------------------------------------------------------
 } // namespace android
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index b91d72b..34a474b 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -41,11 +41,12 @@
 #include <binder/TextOutput.h>
 
 #include <cutils/ashmem.h>
+#include <cutils/compiler.h>
 #include <utils/Flattenable.h>
 #include <utils/Log.h>
-#include <utils/misc.h>
-#include <utils/String8.h>
 #include <utils/String16.h>
+#include <utils/String8.h>
+#include <utils/misc.h>
 
 #include <private/binder/binder_module.h>
 #include "RpcState.h"
@@ -590,12 +591,14 @@
 }
 
 status_t Parcel::writeInterfaceToken(const char16_t* str, size_t len) {
-    const IPCThreadState* threadState = IPCThreadState::self();
-    writeInt32(threadState->getStrictModePolicy() | STRICT_MODE_PENALTY_GATHER);
-    updateWorkSourceRequestHeaderPosition();
-    writeInt32(threadState->shouldPropagateWorkSource() ?
-            threadState->getCallingWorkSourceUid() : IPCThreadState::kUnsetWorkSource);
-    writeInt32(kHeader);
+    if (CC_LIKELY(!isForRpc())) {
+        const IPCThreadState* threadState = IPCThreadState::self();
+        writeInt32(threadState->getStrictModePolicy() | STRICT_MODE_PENALTY_GATHER);
+        updateWorkSourceRequestHeaderPosition();
+        writeInt32(threadState->shouldPropagateWorkSource() ? threadState->getCallingWorkSourceUid()
+                                                            : IPCThreadState::kUnsetWorkSource);
+        writeInt32(kHeader);
+    }
 
     // currently the interface identification token is just its name as a string
     return writeString16(str, len);
@@ -642,31 +645,34 @@
                               size_t len,
                               IPCThreadState* threadState) const
 {
-    // StrictModePolicy.
-    int32_t strictPolicy = readInt32();
-    if (threadState == nullptr) {
-        threadState = IPCThreadState::self();
+    if (CC_LIKELY(!isForRpc())) {
+        // StrictModePolicy.
+        int32_t strictPolicy = readInt32();
+        if (threadState == nullptr) {
+            threadState = IPCThreadState::self();
+        }
+        if ((threadState->getLastTransactionBinderFlags() & IBinder::FLAG_ONEWAY) != 0) {
+            // For one-way calls, the callee is running entirely
+            // disconnected from the caller, so disable StrictMode entirely.
+            // Not only does disk/network usage not impact the caller, but
+            // there's no way to communicate back violations anyway.
+            threadState->setStrictModePolicy(0);
+        } else {
+            threadState->setStrictModePolicy(strictPolicy);
+        }
+        // WorkSource.
+        updateWorkSourceRequestHeaderPosition();
+        int32_t workSource = readInt32();
+        threadState->setCallingWorkSourceUidWithoutPropagation(workSource);
+        // vendor header
+        int32_t header = readInt32();
+        if (header != kHeader) {
+            ALOGE("Expecting header 0x%x but found 0x%x. Mixing copies of libbinder?", kHeader,
+                  header);
+            return false;
+        }
     }
-    if ((threadState->getLastTransactionBinderFlags() &
-         IBinder::FLAG_ONEWAY) != 0) {
-      // For one-way calls, the callee is running entirely
-      // disconnected from the caller, so disable StrictMode entirely.
-      // Not only does disk/network usage not impact the caller, but
-      // there's no way to commuicate back any violations anyway.
-      threadState->setStrictModePolicy(0);
-    } else {
-      threadState->setStrictModePolicy(strictPolicy);
-    }
-    // WorkSource.
-    updateWorkSourceRequestHeaderPosition();
-    int32_t workSource = readInt32();
-    threadState->setCallingWorkSourceUidWithoutPropagation(workSource);
-    // vendor header
-    int32_t header = readInt32();
-    if (header != kHeader) {
-        ALOGE("Expecting header 0x%x but found 0x%x. Mixing copies of libbinder?", kHeader, header);
-        return false;
-    }
+
     // Interface descriptor.
     size_t parcel_interface_len;
     const char16_t* parcel_interface = readString16Inplace(&parcel_interface_len);
diff --git a/libs/binder/TEST_MAPPING b/libs/binder/TEST_MAPPING
index 7490b88..b58d919 100644
--- a/libs/binder/TEST_MAPPING
+++ b/libs/binder/TEST_MAPPING
@@ -43,6 +43,9 @@
       "name": "aidl_integration_test"
     },
     {
+      "name": "memunreachable_binder_test"
+    },
+    {
       "name": "libbinderthreadstateutils_test"
     },
     {
diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index a44c261..8941e49 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -36,11 +36,6 @@
 
 __BEGIN_DECLS
 
-#ifndef __ANDROID_API__
-#error Android builds must be compiled against a specific API. If this is an \
- android platform host build, you must use libbinder_ndk_host_user.
-#endif
-
 typedef uint32_t binder_flags_t;
 enum {
     /**
diff --git a/libs/binder/ndk/include_ndk/android/binder_status.h b/libs/binder/ndk/include_ndk/android/binder_status.h
index 05b25e7..b4dc08a 100644
--- a/libs/binder/ndk/include_ndk/android/binder_status.h
+++ b/libs/binder/ndk/include_ndk/android/binder_status.h
@@ -32,6 +32,16 @@
 
 __BEGIN_DECLS
 
+#ifndef __ANDROID_API__
+#error Android builds must be compiled against a specific API. If this is an \
+ android platform host build, you must use libbinder_ndk_host_user.
+#endif
+
+/**
+ * Low-level status types for use in binder. This is the least preferable way to
+ * return an error for binder services (where binder_exception_t should be used,
+ * particularly EX_SERVICE_SPECIFIC).
+ */
 enum {
     STATUS_OK = 0,
 
@@ -62,6 +72,10 @@
  */
 typedef int32_t binder_status_t;
 
+/**
+ * Top level exceptions types for Android binder errors, mapping to Java
+ * exceptions. Also see Parcel.java.
+ */
 enum {
     EX_NONE = 0,
     EX_SECURITY = -1,
@@ -170,7 +184,8 @@
 /**
  * New status with binder_status_t. This is typically for low level failures when a binder_status_t
  * is returned by an API on AIBinder or AParcel, and that is to be returned from a method returning
- * an AStatus instance.
+ * an AStatus instance. This is the least preferable way to return errors.
+ * Prefer exceptions (particularly service-specific errors) when possible.
  *
  * Available since API level 29.
  *
diff --git a/libs/binder/ndk/include_platform/android/binder_parcel_platform.h b/libs/binder/ndk/include_platform/android/binder_parcel_platform.h
index d54c1a1..6372449 100644
--- a/libs/binder/ndk/include_platform/android/binder_parcel_platform.h
+++ b/libs/binder/ndk/include_platform/android/binder_parcel_platform.h
@@ -20,9 +20,7 @@
 
 __BEGIN_DECLS
 
-#if defined(__ANDROID_APEX__) || defined(__ANDROID_VNDK__)
-#error this is only for platform code
-#endif
+#if !defined(__ANDROID_APEX__) && !defined(__ANDROID_VNDK__)
 
 /**
  * Gets whether or not FDs are allowed by this AParcel
@@ -33,6 +31,9 @@
  */
 bool AParcel_getAllowFds(const AParcel*);
 
+#endif
+
+#if !defined(__ANDROID_APEX__)
 /**
  * Data written to the parcel will be zero'd before being deleted or realloced.
  *
@@ -43,5 +44,6 @@
  * \param parcel The parcel to clear associated data from.
  */
 void AParcel_markSensitive(const AParcel* parcel);
+#endif
 
 __END_DECLS
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 8d08275..f1db653 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -117,6 +117,7 @@
     ABinderProcess_setupPolling; # apex
     AIBinder_getCallingSid; # apex
     AIBinder_setRequestingSid; # apex
+    AParcel_markSensitive; # llndk
     AServiceManager_isDeclared; # apex llndk
     AServiceManager_forEachDeclaredInstance; # apex llndk
     AServiceManager_registerLazyService; # llndk
@@ -139,7 +140,6 @@
 LIBBINDER_NDK_PLATFORM {
   global:
     AParcel_getAllowFds;
-    AParcel_markSensitive;
     extern "C++" {
         AIBinder_fromPlatformBinder*;
         AIBinder_toPlatformBinder*;
diff --git a/libs/binder/rust/src/binder.rs b/libs/binder/rust/src/binder.rs
index 3899d47..321b422 100644
--- a/libs/binder/rust/src/binder.rs
+++ b/libs/binder/rust/src/binder.rs
@@ -56,6 +56,26 @@
     }
 }
 
+/// Interface stability promise
+///
+/// An interface can promise to be a stable vendor interface ([`Vintf`]), or
+/// makes no stability guarantees ([`Local`]). [`Local`] is
+/// currently the default stability.
+pub enum Stability {
+    /// Default stability, visible to other modules in the same compilation
+    /// context (e.g. modules on system.img)
+    Local,
+
+    /// A Vendor Interface Object, which promises to be stable
+    Vintf,
+}
+
+impl Default for Stability {
+    fn default() -> Self {
+        Stability::Local
+    }
+}
+
 /// A local service that can be remotable via Binder.
 ///
 /// An object that implement this interface made be made into a Binder service
@@ -94,6 +114,8 @@
 pub const FLAG_ONEWAY: TransactionFlags = sys::FLAG_ONEWAY;
 /// Corresponds to TF_CLEAR_BUF -- clear transaction buffers after call is made.
 pub const FLAG_CLEAR_BUF: TransactionFlags = sys::FLAG_CLEAR_BUF;
+/// Set to the vendor flag if we are building for the VNDK, 0 otherwise
+pub const FLAG_PRIVATE_LOCAL: TransactionFlags = sys::FLAG_PRIVATE_LOCAL;
 
 /// Internal interface of binder local or remote objects for making
 /// transactions.
@@ -602,6 +624,23 @@
             $interface[$descriptor] {
                 native: $native($on_transact),
                 proxy: $proxy {},
+                stability: $crate::Stability::default(),
+            }
+        }
+    };
+
+    {
+        $interface:path[$descriptor:expr] {
+            native: $native:ident($on_transact:path),
+            proxy: $proxy:ident,
+            stability: $stability:expr,
+        }
+    } => {
+        $crate::declare_binder_interface! {
+            $interface[$descriptor] {
+                native: $native($on_transact),
+                proxy: $proxy {},
+                stability: $stability,
             }
         }
     };
@@ -616,12 +655,33 @@
     } => {
         $crate::declare_binder_interface! {
             $interface[$descriptor] {
+                native: $native($on_transact),
+                proxy: $proxy {
+                    $($fname: $fty = $finit),*
+                },
+                stability: $crate::Stability::default(),
+            }
+        }
+    };
+
+    {
+        $interface:path[$descriptor:expr] {
+            native: $native:ident($on_transact:path),
+            proxy: $proxy:ident {
+                $($fname:ident: $fty:ty = $finit:expr),*
+            },
+            stability: $stability:expr,
+        }
+    } => {
+        $crate::declare_binder_interface! {
+            $interface[$descriptor] {
                 @doc[concat!("A binder [`Remotable`]($crate::Remotable) that holds an [`", stringify!($interface), "`] object.")]
                 native: $native($on_transact),
                 @doc[concat!("A binder [`Proxy`]($crate::Proxy) that holds an [`", stringify!($interface), "`] remote interface.")]
                 proxy: $proxy {
                     $($fname: $fty = $finit),*
                 },
+                stability: $stability,
             }
         }
     };
@@ -635,6 +695,8 @@
             proxy: $proxy:ident {
                 $($fname:ident: $fty:ty = $finit:expr),*
             },
+
+            stability: $stability:expr,
         }
     } => {
         #[doc = $proxy_doc]
@@ -669,7 +731,7 @@
         impl $native {
             /// Create a new binder service.
             pub fn new_binder<T: $interface + Sync + Send + 'static>(inner: T) -> $crate::Strong<dyn $interface> {
-                let binder = $crate::Binder::new($native(Box::new(inner)));
+                let binder = $crate::Binder::new_with_stability($native(Box::new(inner)), $stability);
                 $crate::Strong::new(Box::new(binder))
             }
         }
diff --git a/libs/binder/rust/src/lib.rs b/libs/binder/rust/src/lib.rs
index 5bbd2a3..30928a5 100644
--- a/libs/binder/rust/src/lib.rs
+++ b/libs/binder/rust/src/lib.rs
@@ -107,8 +107,9 @@
 pub mod parcel;
 
 pub use crate::binder::{
-    FromIBinder, IBinder, IBinderInternal, Interface, InterfaceClass, Remotable, Strong,
-    TransactionCode, TransactionFlags, Weak, FIRST_CALL_TRANSACTION, FLAG_CLEAR_BUF, FLAG_ONEWAY,
+    FromIBinder, IBinder, IBinderInternal, Interface, InterfaceClass, Remotable,
+    Stability, Strong, TransactionCode, TransactionFlags, Weak,
+    FIRST_CALL_TRANSACTION, FLAG_CLEAR_BUF, FLAG_ONEWAY, FLAG_PRIVATE_LOCAL,
     LAST_CALL_TRANSACTION,
 };
 pub use error::{status_t, ExceptionCode, Result, Status, StatusCode};
diff --git a/libs/binder/rust/src/native.rs b/libs/binder/rust/src/native.rs
index 185645e..3b3fd08 100644
--- a/libs/binder/rust/src/native.rs
+++ b/libs/binder/rust/src/native.rs
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-use crate::binder::{AsNative, Interface, InterfaceClassMethods, Remotable, TransactionCode};
+use crate::binder::{AsNative, Interface, InterfaceClassMethods, Remotable, Stability, TransactionCode};
 use crate::error::{status_result, status_t, Result, StatusCode};
 use crate::parcel::{Parcel, Serialize};
 use crate::proxy::SpIBinder;
@@ -49,11 +49,19 @@
 unsafe impl<T: Remotable> Send for Binder<T> {}
 
 impl<T: Remotable> Binder<T> {
-    /// Create a new Binder remotable object.
+    /// Create a new Binder remotable object with default stability
     ///
     /// This moves the `rust_object` into an owned [`Box`] and Binder will
     /// manage its lifetime.
     pub fn new(rust_object: T) -> Binder<T> {
+        Self::new_with_stability(rust_object, Stability::default())
+    }
+
+    /// Create a new Binder remotable object with the given stability
+    ///
+    /// This moves the `rust_object` into an owned [`Box`] and Binder will
+    /// manage its lifetime.
+    pub fn new_with_stability(rust_object: T, stability: Stability) -> Binder<T> {
         let class = T::get_class();
         let rust_object = Box::into_raw(Box::new(rust_object));
         let ibinder = unsafe {
@@ -65,10 +73,12 @@
             // ends.
             sys::AIBinder_new(class.into(), rust_object as *mut c_void)
         };
-        Binder {
+        let mut binder = Binder {
             ibinder,
             rust_object,
-        }
+        };
+        binder.mark_stability(stability);
+        binder
     }
 
     /// Set the extension of a binder interface. This allows a downstream
@@ -161,6 +171,42 @@
     pub fn get_descriptor() -> &'static str {
         T::get_descriptor()
     }
+
+    /// Mark this binder object with the given stability guarantee
+    fn mark_stability(&mut self, stability: Stability) {
+        match stability {
+            Stability::Local => self.mark_local_stability(),
+            Stability::Vintf => {
+                unsafe {
+                    // Safety: Self always contains a valid `AIBinder` pointer, so
+                    // we can always call this C API safely.
+                    sys::AIBinder_markVintfStability(self.as_native_mut());
+                }
+            }
+        }
+    }
+
+    /// Mark this binder object with local stability, which is vendor if we are
+    /// building for the VNDK and system otherwise.
+    #[cfg(vendor_ndk)]
+    fn mark_local_stability(&mut self) {
+        unsafe {
+            // Safety: Self always contains a valid `AIBinder` pointer, so
+            // we can always call this C API safely.
+            sys::AIBinder_markVendorStability(self.as_native_mut());
+        }
+    }
+
+    /// Mark this binder object with local stability, which is vendor if we are
+    /// building for the VNDK and system otherwise.
+    #[cfg(not(vendor_ndk))]
+    fn mark_local_stability(&mut self) {
+        unsafe {
+            // Safety: Self always contains a valid `AIBinder` pointer, so
+            // we can always call this C API safely.
+            sys::AIBinder_markSystemStability(self.as_native_mut());
+        }
+    }
 }
 
 impl<T: Remotable> Interface for Binder<T> {
diff --git a/libs/binder/rust/sys/BinderBindings.hpp b/libs/binder/rust/sys/BinderBindings.hpp
index ef142b5..65fa2ca 100644
--- a/libs/binder/rust/sys/BinderBindings.hpp
+++ b/libs/binder/rust/sys/BinderBindings.hpp
@@ -21,6 +21,7 @@
 #include <android/binder_parcel_platform.h>
 #include <android/binder_process.h>
 #include <android/binder_shell.h>
+#include <android/binder_stability.h>
 #include <android/binder_status.h>
 
 namespace android {
@@ -80,6 +81,7 @@
 enum {
     FLAG_ONEWAY = FLAG_ONEWAY,
     FLAG_CLEAR_BUF = FLAG_CLEAR_BUF,
+    FLAG_PRIVATE_LOCAL = FLAG_PRIVATE_LOCAL,
 };
 
 } // namespace consts