[reactos] 11/15: [NTOS:KE] Zero out ExceptionFrame member in Syscall handler

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=04f0c7d0d7d3d9981476cc...

commit 04f0c7d0d7d3d9981476cca55372bdf49d200a1e
Author:     Timo Kreuzer [e-mail]
AuthorDate: Tue May 15 12:43:37 2018 +0200
Commit:     Timo Kreuzer [e-mail]
CommitDate: Sun Sep 20 23:08:17 2020 +0200

[NTOS:KE] Zero out ExceptionFrame member in Syscall handler
---
 ntoskrnl/ke/amd64/stubs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ntoskrnl/ke/amd64/stubs.c b/ntoskrnl/ke/amd64/stubs.c
index ff973935d69..b5ae60a550d 100644
--- a/ntoskrnl/ke/amd64/stubs.c
+++ b/ntoskrnl/ke/amd64/stubs.c
@@ -330,6 +330,9 @@ KiSystemCallHandler(
     TrapFrame->TrapFrame = (ULONG64)Thread->TrapFrame;
     Thread->TrapFrame = TrapFrame;

+    /* We don't have an exception frame yet */
+    TrapFrame->ExceptionFrame = 0;
+
     /* Before enabling interrupts get the user rsp from the KPCR */
     UserRsp = __readgsqword(FIELD_OFFSET(KIPCR, UserRsp));
     TrapFrame->Rsp = UserRsp;