diff --git a/media/jni/android_media_tv_Tuner.cpp b/media/jni/android_media_tv_Tuner.cpp
index 5db672993df18..5daf8b0f88f85 100644
--- a/media/jni/android_media_tv_Tuner.cpp
+++ b/media/jni/android_media_tv_Tuner.cpp
@@ -171,6 +171,12 @@ static int IP_V6_LENGTH = 16;
 
 void DestroyCallback(const C2Buffer * /* buf */, void *arg) {
     android::sp<android::MediaEvent> event = (android::MediaEvent *)arg;
+    if (event->mLinearBlockObj != NULL) {
+        JNIEnv *env = android::AndroidRuntime::getJNIEnv();
+        env->DeleteWeakGlobalRef(event->mLinearBlockObj);
+        event->mLinearBlockObj = NULL;
+    }
+
     event->mAvHandleRefCnt--;
     event->finalize();
 }
@@ -182,6 +188,12 @@ LnbCallback::LnbCallback(jobject lnbObj, LnbId id) : mId(id) {
     mLnb = env->NewWeakGlobalRef(lnbObj);
 }
 
+LnbCallback::~LnbCallback() {
+    JNIEnv *env = AndroidRuntime::getJNIEnv();
+    env->DeleteWeakGlobalRef(mLnb);
+    mLnb = NULL;
+}
+
 Return<void> LnbCallback::onEvent(LnbEventType lnbEventType) {
     ALOGD("LnbCallback::onEvent, type=%d", lnbEventType);
     JNIEnv *env = AndroidRuntime::getJNIEnv();
@@ -305,6 +317,7 @@ MediaEvent::MediaEvent(sp<IFilter> iFilter, hidl_handle avHandle,
     JNIEnv *env = AndroidRuntime::getJNIEnv();
     mMediaEventObj = env->NewWeakGlobalRef(obj);
     mAvHandle = native_handle_clone(avHandle.getNativeHandle());
+    mLinearBlockObj = NULL;
 }
 
 MediaEvent::~MediaEvent() {
@@ -367,7 +380,7 @@ jobject MediaEvent::getLinearBlock() {
                 true);
         mLinearBlockObj = env->NewWeakGlobalRef(linearBlock);
         mAvHandleRefCnt++;
-        return mLinearBlockObj;
+        return linearBlock;
     } else {
         native_handle_close(const_cast<native_handle_t*>(
                     reinterpret_cast<const native_handle_t*>(mIonHandle)));
diff --git a/media/jni/android_media_tv_Tuner.h b/media/jni/android_media_tv_Tuner.h
index fd29959174750..c4deeaf887bbd 100644
--- a/media/jni/android_media_tv_Tuner.h
+++ b/media/jni/android_media_tv_Tuner.h
@@ -73,6 +73,7 @@ namespace android {
 
 struct LnbCallback : public ILnbCallback {
     LnbCallback(jweak tunerObj, LnbId id);
+    ~LnbCallback();
     virtual Return<void> onEvent(LnbEventType lnbEventType);
     virtual Return<void> onDiseqcMessage(const hidl_vec<uint8_t>& diseqcMessage);
     jweak mLnb;