From b8103265ec63fa87ac264c62bb796dbc38376652 Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Thu, 17 Sep 2026 15:02:29 +0300
Subject: [PATCH] =?UTF-8?q?sys:=20FspFastIoDeviceControl:=20fix=20vulnerab?=
 =?UTF-8?q?ility=20reported=20by:=20Luigino=20Camastra=20=E2=80=94=20AISLE?=
 =?UTF-8?q?=20Research?=
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---
 src/sys/devctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sys/devctl.c b/src/sys/devctl.c
index d2d95947..57327fc4 100644
--- a/src/sys/devctl.c
+++ b/src/sys/devctl.c
@@ -68,7 +68,8 @@ BOOLEAN FspFastIoDeviceControl(
     Result = DEBUGTEST(50) &&
         CanWait &&
         FSP_IOCTL_TRANSACT == IoControlCode &&
-        FspFsctlDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind;
+        FspFsctlDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind &&
+        0 != FileObject->FsContext2;
     if (!Result)
         FSP_RETURN();