[libcamera-devel] [PATCH 1/1] qcam: Fix crash when switching from non existant camera

[Utkarsh Tiwari]

When switching to different camera we try to release the camera
previously used. But if that camera has been unplugged, then its
instance would have been destroyed. Accessing it leads to seg fault.

Fix by checking camera_ to see if it exists.

Bug: https://bugs.libcamera.org/show_bug.cgi?id=147
Signed-off-by: Utkarsh Tiwari <utkarsh02t at gmail.com>
---
 src/qcam/main_window.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/qcam/main_window.cpp b/src/qcam/main_window.cpp
index 6fe36168..e0e5092e 100644
--- a/src/qcam/main_window.cpp
+++ b/src/qcam/main_window.cpp
@@ -284,7 +284,9 @@ void MainWindow::switchCamera()
 	 */
 	startStopAction_->setChecked(false);
 
-	camera_->release();
+	if (camera_)
+		camera_->release();
+
 	camera_ = cam;
 
 	startStopAction_->setChecked(true);
-- 
2.34.1