From f629e17ff48b9639fc9709e491bb590630743aa4 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Wed, 12 Jul 2023 16:04:45 +0200
Subject: [PATCH] kernel/x86_64: Only show kernel addresses in backtraces

This avoids walking off into userspace memory where we don't know what could happen.
---
 kernel/src/arch/x86_64/CPU.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/src/arch/x86_64/CPU.cpp b/kernel/src/arch/x86_64/CPU.cpp
index dec29b60..4ef521ad 100644
--- a/kernel/src/arch/x86_64/CPU.cpp
+++ b/kernel/src/arch/x86_64/CPU.cpp
@@ -327,7 +327,7 @@ namespace CPU
     static void backtrace_impl(u64 base_pointer, void (*callback)(u64, void*), void* arg)
     {
         StackFrame* current_frame = (StackFrame*)base_pointer;
-        while (current_frame &&
+        while (current_frame && (u64)current_frame >= 0xFFFF'FFFF'8000'0000 &&
                MemoryManager::validate_access(current_frame, sizeof(*current_frame), MemoryManager::DEFAULT_ACCESS) &&
                current_frame->instruction)
         {