From 6876b9a51497956de86a29ccc5f108b1d37e4327 Mon Sep 17 00:00:00 2001
From: Sahan Fernando <sahan.h.fernando@gmail.com>
Date: Fri, 29 Jan 2021 10:28:27 +1100
Subject: [PATCH] Kernel: Prevent mmap-ing as both fixed and randomized

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

diff --git a/Kernel/Syscalls/mmap.cpp b/Kernel/Syscalls/mmap.cpp
index 49c14ddba9..47c2ad65ca 100644
--- a/Kernel/Syscalls/mmap.cpp
+++ b/Kernel/Syscalls/mmap.cpp
@@ -128,6 +128,9 @@ void* Process::sys$mmap(Userspace<const Syscall::SC_mmap_params*> user_params)
     if (!map_shared && !map_private)
         return (void*)-EINVAL;
 
+    if (map_fixed && map_randomized)
+        return (void*)-EINVAL;
+
     if (!validate_mmap_prot(prot, map_stack))
         return (void*)-EINVAL;