[reactos] 01/01: [FLTMGR] CreateClientPort(): Fix ObInsertObject() error handling

[Serge Gautherie]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=5ba5051f7960b8e2275d0…

commit 5ba5051f7960b8e2275d0018d1656438a68cf3a0
Author:     Serge Gautherie <reactos-git_serge_171003(a)gautherie.fr>
AuthorDate: Mon May 24 08:56:17 2021 +0200
Commit:     Victor Perevertkin <victor(a)perevertkin.ru>
CommitDate: Tue Dec 28 02:27:50 2021 +0300

    [FLTMGR] CreateClientPort(): Fix ObInsertObject() error handling
    
    Avoid extra ObDereferenceObject().
    
    CORE-17904
---
 drivers/filters/fltmgr/Messaging.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/filters/fltmgr/Messaging.c b/drivers/filters/fltmgr/Messaging.c
index f4ed276eb4d..713e8fd1770 100644
--- a/drivers/filters/fltmgr/Messaging.c
+++ b/drivers/filters/fltmgr/Messaging.c
@@ -699,10 +699,12 @@ CreateClientPort(_In_ PFILE_OBJECT FileObject,
         goto Quit;
     }
 
-    /* Now insert the new client port into the object manager*/
-    Status = ObInsertObject(ClientPortObject, 0, FLT_PORT_ALL_ACCESS, 1, 0,
(PHANDLE)&PortHandle);
+    /* Now insert the new client port into the object manager */
+    Status = ObInsertObject(ClientPortObject, NULL, FLT_PORT_ALL_ACCESS, 1, NULL,
(PHANDLE)&PortHandle);
     if (!NT_SUCCESS(Status))
     {
+        /* ObInsertObject() failed and already dereferenced ClientPortObject */
+        ClientPortObject = NULL;
         goto Quit;
     }