From 02ef3f6343a82bf16202db82d176fb78d35a69de Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 20 Dec 2020 18:45:08 +0100
Subject: [PATCH] Kernel: Ptrace should not assert on poke in non-mapped tracee
 memory

---
 Kernel/Syscalls/ptrace.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Kernel/Syscalls/ptrace.cpp b/Kernel/Syscalls/ptrace.cpp
index 66b3c46451..ccc585a511 100644
--- a/Kernel/Syscalls/ptrace.cpp
+++ b/Kernel/Syscalls/ptrace.cpp
@@ -75,7 +75,8 @@ KResult Process::poke_user_data(Userspace<u32*> address, u32 data)
     ProcessPagingScope scope(*this);
     Range range = { VirtualAddress(address), sizeof(u32) };
     auto* region = find_region_containing(range);
-    ASSERT(region != nullptr);
+    if (!region)
+        return KResult(-EFAULT);
     if (region->is_shared()) {
         // If the region is shared, we change its vmobject to a PrivateInodeVMObject
         // to prevent the write operation from changing any shared inode data