[PATCH v4 2/2] msxml3: Null check newNode in domelem insertBefore.

[Jefferson Carpenter]

From 8d9bbf2c5c8098633aff9b3770530f960dd2298f Mon Sep 17 00:00:00 2001
From: Jefferson Carpenter <jeffersoncarpenter2 at gmail.com>
Date: Thu, 27 May 2021 12:40:08 +0000
Subject: [PATCH 2/2] msxml3: Null check newNode in domelem insertBefore.

Signed-off-by: Jefferson Carpenter <jeffersoncarpenter2 at gmail.com>
---
 dlls/msxml3/element.c      | 2 ++
 dlls/msxml3/tests/domdoc.c | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/dlls/msxml3/element.c b/dlls/msxml3/element.c
index 05255508d4e..5891653a76f 100644
--- a/dlls/msxml3/element.c
+++ b/dlls/msxml3/element.c
@@ -309,6 +309,8 @@ static HRESULT WINAPI domelem_insertBefore(
 
     TRACE("(%p)->(%p %s %p)\n", This, newNode, debugstr_variant(&refChild), old_node);
 
+    if (!newNode) return E_INVALIDARG;
+
     hr = IXMLDOMNode_get_nodeType(newNode, &type);
     if (hr != S_OK) return hr;
 
diff --git a/dlls/msxml3/tests/domdoc.c b/dlls/msxml3/tests/domdoc.c
index 0cc4d9c3c24..80c5cd530bb 100644
--- a/dlls/msxml3/tests/domdoc.c
+++ b/dlls/msxml3/tests/domdoc.c
@@ -9416,6 +9416,13 @@ static void test_insertBefore(void)
 
     todo_wine EXPECT_REF(elem2, 2);
 
+    /* NULL to element */
+    V_VT(&v) = VT_NULL;
+    node = (void*)0xdeadbeef;
+    hr = IXMLDOMElement_insertBefore(elem1, NULL, v, &node);
+    ok(hr == E_INVALIDARG, "got 0x%08x\n", hr);
+    ok(node == (void*)0xdeadbeef, "got %p\n", node);
+
     /* document to element */
     V_VT(&v) = VT_DISPATCH;
     V_DISPATCH(&v) = NULL;
-- 
2.26.2