From d5d08b3f1ee544ffd6121819e36b231f5dab7450 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Sun, 1 Mar 2026 15:31:22 +0000
Subject: [PATCH] screencopy: fix nullptr deref if shm format is weird

---
 src/protocols/Screencopy.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/protocols/Screencopy.cpp b/src/protocols/Screencopy.cpp
index 74b3b608d..9d30be51b 100644
--- a/src/protocols/Screencopy.cpp
+++ b/src/protocols/Screencopy.cpp
@@ -87,6 +87,13 @@ CScreencopyFrame::CScreencopyFrame(SP<CZwlrScreencopyFrameV1> resource_, WP<CScr
     auto       bufSize = m_frame->bufferSize();
 
     const auto PSHMINFO = NFormatUtils::getPixelFormatFromDRM(format);
+
+    if (!PSHMINFO) {
+        LOGM(Log::ERR, "No pixel format for drm format");
+        m_resource->sendFailed();
+        return;
+    }
+
     const auto stride   = NFormatUtils::minStride(PSHMINFO, bufSize.x);
     m_resource->sendBuffer(NFormatUtils::drmToShm(format), bufSize.x, bufSize.y, stride);