From bc584bdf9994b8e17034e94a02788a8996aec9e9 Mon Sep 17 00:00:00 2001
From: Nguyen Trung Khanh <nguyentrungkhanh97@gmail.com>
Date: Sat, 15 Aug 2020 17:18:35 +0700
Subject: [PATCH] [NTOS:PS] Fix stack memory disclosure in PsGetContextThread
 #3024

Fix stack memory disclosure in PsGetContextThread.
---
 ntoskrnl/ps/debug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ntoskrnl/ps/debug.c b/ntoskrnl/ps/debug.c
index d87595a8d54..b7ea2db32eb 100644
--- a/ntoskrnl/ps/debug.c
+++ b/ntoskrnl/ps/debug.c
@@ -112,7 +112,7 @@ PsGetContextThread(IN PETHREAD Thread,
     /* Enter SEH */
     _SEH2_TRY
     {
-        /* Set default ength */
+        /* Set default length */
         Size = sizeof(CONTEXT);
 
         /* Read the flags */
@@ -146,6 +146,7 @@ PsGetContextThread(IN PETHREAD Thread,
     KeInitializeEvent(&GetSetContext.Event, NotificationEvent, FALSE);
 
     /* Set the flags and previous mode */
+    RtlZeroMemory(&GetSetContext.Context, Size);
     GetSetContext.Context.ContextFlags = Flags;
     GetSetContext.Mode = PreviousMode;