[libcamera-devel,v4,10/12] android: camera_device: Fix variables access without protection
diff mbox series

Message ID 20211201070728.3114247-11-hiroh@chromium.org
State Superseded
Headers show
Series
  • Introduce clang thread safety annotations
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Commit Message

Hirokazu Honda Dec. 1, 2021, 7:07 a.m. UTC 
This fixes the code accessing descriptors and
Camera3RequestDescriptor::pendingStreamsToProcess_ without holding
descriptorsMutex_ and Camera3RequestDescriptor::streamProcessMutex_
in CameraDevice.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/android/camera_device.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Patch
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diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
index d74307a2..c7de5da0 100644
--- a/src/android/camera_device.cpp
+++ b/src/android/camera_device.cpp
@@ -421,7 +421,11 @@  void CameraDevice::stop()
 	worker_.stop();
 	camera_->stop();
 
-	descriptors_ = {};
+	{
+		MutexLocker descriptorsLock(descriptorsMutex_);
+		descriptors_ = {};
+	}
+
 	streams_.clear();
 
 	state_ = State::Stopped;
@@ -918,6 +922,9 @@  int CameraDevice::processCaptureRequest(camera3_capture_request_t *camera3Reques
 		 */
 		FrameBuffer *frameBuffer = nullptr;
 		int acquireFence = -1;
+
+		MutexLocker lock(descriptor->streamsProcessMutex_);
+
 		switch (cameraStream->type()) {
 		case CameraStream::Type::Mapped:
 			/*