From efa84a263d1c3d601a50c72f0a986f62aaaa22df Mon Sep 17 00:00:00 2001
From: "Rustem Gimadutdinov (rgimad)" <rustem.gimadutdinov@gmail.com>
Date: Tue, 17 Nov 2020 20:00:28 +0000
Subject: [PATCH] fix is_region_userspace (worked incorrectly for e.g
 0xFFFFFFFF)

git-svn-id: svn://kolibrios.org@8216 a494cfbc-eb01-0410-851d-a64ba20cac60
---
 kernel/trunk/kernel.asm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/trunk/kernel.asm b/kernel/trunk/kernel.asm
index 10ee2b0e41..9a312fdbdf 100644
--- a/kernel/trunk/kernel.asm
+++ b/kernel/trunk/kernel.asm
@@ -5674,13 +5674,16 @@ is_region_userspace:
 ;      ebx = len
 ; out: eax = 1 if region in userspace memory, 0 if not
         push    esi edi ecx
+
+        cmp     eax, OS_BASE
+        ja      @f
+
         add     eax, ebx
         cmp     eax, OS_BASE
         ja      @f
 
         mov     eax, 1
-        jmp     .ret 
-
+        jmp     .ret
 @@:
         xor     eax, eax
 .ret: