camera2/3: Add protection to callback processing call

Callback stream in callbackprocessor could be delleted while process or
discard callback are ongoing, which leads CpuConsumer related call crash.

Bug 9303911

Change-Id: Ib6137e512208e5603468eba166640729b744e8f9

1 files changed, 7 insertions, 0 deletions

diff --git a/services/camera/libcameraservice/camera2/CallbackProcessor.cpp b/services/camera/libcameraservice/camera2/CallbackProcessor.cpp
index 5fa84e0..05c0abe 100644
--- a/services/camera/libcameraservice/camera2/CallbackProcessor.cpp
+++ b/services/camera/libcameraservice/camera2/CallbackProcessor.cpp
@@ -182,6 +182,13 @@ bool CallbackProcessor::threadLoop() {
     }
 
     do {
+        Mutex::Autolock l(mInputMutex);
+        if (mCallbackStreamId == NO_STREAM) {
+            ALOGV("%s: Camera %d:No stream is available"
+                    , __FUNCTION__, mId);
+            break;
+        }
+
         sp<Camera2Client> client = mClient.promote();
         if (client == 0) {
             res = discardNewCallback();