From d8136adbed1653561d2107174e628e2eaa386ff4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20Rydg=C3=A5rd?= <hrydgard@gmail.com>
Date: Mon, 2 Jan 2023 22:01:20 +0100
Subject: [PATCH] GPUCommon::FastRunLoop: Try not to crash

---
 GPU/GPUCommon.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/GPU/GPUCommon.cpp b/GPU/GPUCommon.cpp
index 5e5ea82763..a1c205cfdc 100644
--- a/GPU/GPUCommon.cpp
+++ b/GPU/GPUCommon.cpp
@@ -1197,6 +1197,13 @@ bool GPUCommon::InterpretList(DisplayList &list) {
 // Maybe should write this in ASM...
 void GPUCommon::FastRunLoop(DisplayList &list) {
 	PROFILE_THIS_SCOPE("gpuloop");
+
+	if (!Memory::IsValidAddress(list.pc)) {
+		// We're having some serious problems here, just bail and try to limp along and not crash the app.
+		downcount = 0;
+		return;
+	}
+
 	const CommandInfo *cmdInfo = cmdInfo_;
 	int dc = downcount;
 	for (; dc > 0; --dc) {