From 05bbbd7d8b5c6c039c8f9b3727db522a42e75a33 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Mon, 11 Apr 2022 10:53:36 +0900
Subject: [PATCH] [NTUSER] Dereference spDefaultImc at UserCreateInputContext
 (#4446)

Dereference pti->spDefaultImc by UserDereferenceObject if pti->spDefaultImc is NULL at UserCreateInputContext function. CORE-11700
---
 win32ss/user/ntuser/ime.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/win32ss/user/ntuser/ime.c b/win32ss/user/ntuser/ime.c
index 1c46bfded3b..7b6c06b9f94 100644
--- a/win32ss/user/ntuser/ime.c
+++ b/win32ss/user/ntuser/ime.c
@@ -1362,6 +1362,8 @@ PIMC FASTCALL UserCreateInputContext(ULONG_PTR dwClientImcData)
     else // First time. It's the default IMC.
     {
         // Add the first one (default) to the list.
+        if (pti->spDefaultImc)
+            UserDereferenceObject(pti->spDefaultImc);
         pti->spDefaultImc = pIMC;
         pIMC->pImcNext = NULL;
     }