diff --git a/media/codec2/vndk/platform/C2SurfaceSyncObj.cpp b/media/codec2/vndk/platform/C2SurfaceSyncObj.cpp
index e55bdc0047..bbbd03efeb 100644
--- a/media/codec2/vndk/platform/C2SurfaceSyncObj.cpp
+++ b/media/codec2/vndk/platform/C2SurfaceSyncObj.cpp
@@ -64,6 +64,11 @@ std::shared_ptr<C2SurfaceSyncMemory> C2SurfaceSyncMemory::Import(
     }
 
     HandleSyncMem *o = static_cast<HandleSyncMem*>(handle);
+    if (o->size() < sizeof(C2SyncVariables)) {
+        android_errorWriteLog(0x534e4554, "240140929");
+        return nullptr;
+    }
+
     void *ptr = mmap(NULL, o->size(), PROT_READ | PROT_WRITE, MAP_SHARED, o->memFd(), 0);
 
     if (ptr == MAP_FAILED) {
diff --git a/media/libstagefright/NuMediaExtractor.cpp b/media/libstagefright/NuMediaExtractor.cpp
index 2b45f2d16d..5b39618ad7 100644
--- a/media/libstagefright/NuMediaExtractor.cpp
+++ b/media/libstagefright/NuMediaExtractor.cpp
@@ -639,9 +639,11 @@ status_t NuMediaExtractor::appendVorbisNumPageSamples(
         numPageSamples = -1;
     }
 
+    // insert, including accounting for the space used.
     memcpy((uint8_t *)buffer->data() + mbuf->range_length(),
            &numPageSamples,
            sizeof(numPageSamples));
+    buffer->setRange(buffer->offset(), buffer->size() + sizeof(numPageSamples));
 
     uint32_t type;
     const void *data;
@@ -690,6 +692,8 @@ status_t NuMediaExtractor::readSampleData(const sp<ABuffer> &buffer) {
 
     ssize_t minIndex = fetchAllTrackSamples();
 
+    buffer->setRange(0, 0);     // start with an empty buffer
+
     if (minIndex < 0) {
         return ERROR_END_OF_STREAM;
     }
@@ -705,25 +709,25 @@ status_t NuMediaExtractor::readSampleData(const sp<ABuffer> &buffer) {
         sampleSize += sizeof(int32_t);
     }
 
+    // capacity() is ok since we cleared out the buffer
     if (buffer->capacity() < sampleSize) {
         return -ENOMEM;
     }
 
+    const size_t srclen = it->mBuffer->range_length();
     const uint8_t *src =
         (const uint8_t *)it->mBuffer->data()
             + it->mBuffer->range_offset();
 
-    memcpy((uint8_t *)buffer->data(), src, it->mBuffer->range_length());
+    memcpy((uint8_t *)buffer->data(), src, srclen);
+    buffer->setRange(0, srclen);
 
     status_t err = OK;
     if (info->mTrackFlags & kIsVorbis) {
+        // adjusts range when it inserts the extra bits
         err = appendVorbisNumPageSamples(it->mBuffer, buffer);
     }
 
-    if (err == OK) {
-        buffer->setRange(0, sampleSize);
-    }
-
     return err;
 }
 
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index 583ff01f34..f8b1d927db 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -711,8 +711,29 @@ Status AudioPolicyService::startInput(int32_t portIdAidl)
 
     Mutex::Autolock _l(mLock);
 
+    ALOGW_IF(client->silenced, "startInput on silenced input for port %d, uid %d. Unsilencing.",
+            portIdAidl,
+            client->attributionSource.uid);
+
+    if (client->active) {
+        ALOGE("Client should never be active before startInput. Uid %d port %d",
+                client->attributionSource.uid, portId);
+        finishRecording(client->attributionSource, client->attributes.source);
+        return binderStatusFromStatusT(INVALID_OPERATION);
+    }
+
+    // Force the possibly silenced client to be unsilenced since we just called
+    // startRecording (i.e. we have assumed it is unsilenced).
+    // At this point in time, the client is inactive, so no calls to appops are sent in
+    // setAppState_l.
+    // This ensures existing clients have the same behavior as new clients (starting unsilenced).
+    // TODO(b/282076713)
+    setAppState_l(client, APP_STATE_TOP);
+
     client->active = true;
     client->startTimeNs = systemTime();
+    // This call updates the silenced state, and since we are active, appropriately notifies appops
+    // if we silence the track.
     updateUidStates_l();
 
     status_t status;