From 8963947f0f22f2917fde11a71fa8be062ab1e8fa Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Tue, 14 Aug 2018 13:34:14 -0300
Subject: [PATCH] Check for invalid ids

---
 Ryujinx.HLE/OsHle/SystemState/UserId.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Ryujinx.HLE/OsHle/SystemState/UserId.cs b/Ryujinx.HLE/OsHle/SystemState/UserId.cs
index f186d00c21..278ea9f772 100644
--- a/Ryujinx.HLE/OsHle/SystemState/UserId.cs
+++ b/Ryujinx.HLE/OsHle/SystemState/UserId.cs
@@ -13,6 +13,11 @@ namespace Ryujinx.HLE.OsHle.SystemState
 
         public UserId(long Low, long High)
         {
+            if ((Low | High) == 0)
+            {
+                throw new ArgumentException("Zero is not a valid user id!");
+            }
+
             byte[] Bytes = new byte[16];
 
             int Index = Bytes.Length;
@@ -42,7 +47,12 @@ namespace Ryujinx.HLE.OsHle.SystemState
         {
             if (UserIdHex == null || UserIdHex.Length != 32 || !UserIdHex.All("0123456789abcdefABCDEF".Contains))
             {
-                throw new ArgumentException("UserId is not a valid Hex string", nameof(UserIdHex));
+                throw new ArgumentException("Invalid user id!", nameof(UserIdHex));
+            }
+
+            if (UserIdHex == "00000000000000000000000000000000")
+            {
+                throw new ArgumentException("Zero is not a valid user id!", nameof(UserIdHex));
             }
 
             this.UserIdHex = UserIdHex.ToUpper();