From: Thomas Faber <thomas.faber@reactos.org>
Date: Sun, 3 Feb 2019 15:55:04 +0000 (+0100)
Subject: [COMCTL32] Check for NULL pointer when handling BCM_GETIDEALSIZE.
X-Git-Tag: 0.4.13-dev~377
X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=8dcdf82e71c3b032617251ab0ec2024b7f4f820a;ds=sidebyside

[COMCTL32] Check for NULL pointer when handling BCM_GETIDEALSIZE.

Fixes crash in comctl32_winetest:button.
---

diff --git a/dll/win32/comctl32/button.c b/dll/win32/comctl32/button.c
index 59067471f1e..1d7431d0b16 100644
--- a/dll/win32/comctl32/button.c
+++ b/dll/win32/comctl32/button.c
@@ -941,6 +941,11 @@ static LRESULT CALLBACK BUTTON_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, L
         BOOL ret = FALSE;
         SIZE* pSize = (SIZE*)lParam;
 
+        if (!pSize)
+        {
+            return FALSE;
+        }
+
         if (btn_type == BS_PUSHBUTTON || 
             btn_type == BS_DEFPUSHBUTTON ||
             btn_type == BS_USERBUTTON)