From 4e155d8189f5fd7eeb4bee3f734833a218bbd390 Mon Sep 17 00:00:00 2001
From: Justin Miller <justin.miller@reactos.org>
Date: Fri, 16 Oct 2026 17:34:08 -0700
Subject: [PATCH] [NTOS:KE] Lower IRQL back down

---
 ntoskrnl/ke/amd64/trap.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ntoskrnl/ke/amd64/trap.S b/ntoskrnl/ke/amd64/trap.S
index 7270af76cc9..51b76d61031 100644
--- a/ntoskrnl/ke/amd64/trap.S
+++ b/ntoskrnl/ke/amd64/trap.S
@@ -695,6 +695,10 @@ PUBLIC KiIpiInterrupt
     /* Call the worker routine */
     call KiIpiInterruptHandler
 
+    /* Go back to the old irql */
+    movzx rax, byte ptr [rbp + KTRAP_FRAME_PreviousIrql]
+    mov cr8, rax
+
     /* Return */
     ExitTrap (TF_SAVE_ALL or TF_IRQL)
 .ENDP