From 64639de4d25905febf9ee48b5211696ac691bbe4 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gunnar@beutner.name>
Date: Sun, 25 Apr 2021 13:39:11 +0200
Subject: [PATCH] Kernel: Stop walking the stack when we encounter return
 address 0

---
 Kernel/PerformanceEventBuffer.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Kernel/PerformanceEventBuffer.cpp b/Kernel/PerformanceEventBuffer.cpp
index 1aafac5b40..8f8023e510 100644
--- a/Kernel/PerformanceEventBuffer.cpp
+++ b/Kernel/PerformanceEventBuffer.cpp
@@ -45,6 +45,8 @@ static Vector<FlatPtr, PerformanceEvent::max_stack_frame_count> raw_backtrace(Fl
         FlatPtr retaddr;
         if (!safe_memcpy(&retaddr, (void*)(stack_ptr + sizeof(FlatPtr)), sizeof(FlatPtr), fault_at))
             break;
+        if (retaddr == 0)
+            break;
         backtrace.append(retaddr);
         if (backtrace.size() == PerformanceEvent::max_stack_frame_count)
             break;