From dde7a2efac1f5ad9f1d9b913d8e355ce53a7ed37 Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Thu, 16 Dec 2021 16:44:01 +0100
Subject: [PATCH] backends/drm: fix crash with direct scanout

BUG: 447079
---
 src/backends/drm/egl_gbm_backend.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/backends/drm/egl_gbm_backend.cpp b/src/backends/drm/egl_gbm_backend.cpp
index 64905bba59..5ee60fea0a 100644
--- a/src/backends/drm/egl_gbm_backend.cpp
+++ b/src/backends/drm/egl_gbm_backend.cpp
@@ -624,7 +624,9 @@ bool EglGbmBackend::scanout(AbstractOutput *drmOutput, SurfaceItem *surfaceItem)
         return false;
     }
     if (output.oldScanoutCandidate && output.oldScanoutCandidate != surface) {
-        output.oldScanoutCandidate->dmabufFeedbackV1()->setTranches({});
+        if (output.oldScanoutCandidate->dmabufFeedbackV1()) {
+            output.oldScanoutCandidate->dmabufFeedbackV1()->setTranches({});
+        }
         output.oldScanoutCandidate = nullptr;
     }
     output.scanoutCandidate = surface;