15/18: [FLTMGR] Callers must have registered an unload routine to be allowed to unload

[Ged Murphy]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c73c1825e23b97c77dbb8…
commit c73c1825e23b97c77dbb8f2163dcc8b6d5558e05
Author:     Ged Murphy <gedmurphy(a)reactos.org>
AuthorDate: Mon Oct 29 11:28:10 2018 +0000
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Mon Oct 29 23:56:39 2018 +0100
    [FLTMGR] Callers must have registered an unload routine to be allowed to unload
---
 drivers/filters/fltmgr/Filter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/filters/fltmgr/Filter.c b/drivers/filters/fltmgr/Filter.c
index 92a824c0d3..1c50f14738 100644
--- a/drivers/filters/fltmgr/Filter.c
+++ b/drivers/filters/fltmgr/Filter.c
@@ -250,7 +250,7 @@ FltRegisterFilter(_In_ PDRIVER_OBJECT DriverObject,
     Filter->OldDriverUnload =
(PFLT_FILTER_UNLOAD_CALLBACK)DriverObject->DriverUnload;
     /* Check we opted not to have an unload routine, or if we want to stop the driver
from being unloaded */
-    if (!FlagOn(Filter->Flags, FLTFL_REGISTRATION_DO_NOT_SUPPORT_SERVICE_STOP))
+    if (Registration->FilterUnloadCallback && !FlagOn(Filter->Flags,
FLTFL_REGISTRATION_DO_NOT_SUPPORT_SERVICE_STOP))
     {
         DriverObject->DriverUnload = (PDRIVER_UNLOAD)FltpMiniFilterDriverUnload;
     }