From 47d4097efaa616452c10b708d878136fa3528c8e Mon Sep 17 00:00:00 2001
From: Henri Verbeet <hverbeet@codeweavers.com>
Date: Thu, 21 Sep 2023 16:49:11 +0200
Subject: [PATCH] vkd3d-utils: Check for a NULL 'blob' pointer in
 D3DCreateBlob().

---
 libs/vkd3d-utils/vkd3d_utils_main.c    |  6 ++++++
 libs/vkd3d-utils/vkd3d_utils_private.h |  4 ++++
 tests/hlsl_d3d12.c                     | 24 ++++++++++++++++++++++++
 3 files changed, 34 insertions(+)

diff --git a/libs/vkd3d-utils/vkd3d_utils_main.c b/libs/vkd3d-utils/vkd3d_utils_main.c
index b0c025f4..e7985e3c 100644
--- a/libs/vkd3d-utils/vkd3d_utils_main.c
+++ b/libs/vkd3d-utils/vkd3d_utils_main.c
@@ -537,6 +537,12 @@ HRESULT WINAPI D3DCreateBlob(SIZE_T data_size, ID3DBlob **blob)
 
     TRACE("data_size %lu, blob %p.\n", data_size, blob);
 
+    if (!blob)
+    {
+        WARN("Invalid 'blob' pointer specified.\n");
+        return D3DERR_INVALIDCALL;
+    }
+
     if (!(data = vkd3d_calloc(data_size, 1)))
         return E_OUTOFMEMORY;
 
diff --git a/libs/vkd3d-utils/vkd3d_utils_private.h b/libs/vkd3d-utils/vkd3d_utils_private.h
index 1b8254b6..e0a697de 100644
--- a/libs/vkd3d-utils/vkd3d_utils_private.h
+++ b/libs/vkd3d-utils/vkd3d_utils_private.h
@@ -31,4 +31,8 @@
 #include "vkd3d_memory.h"
 #include <vkd3d_utils.h>
 
+#ifndef D3DERR_INVALIDCALL
+#define D3DERR_INVALIDCALL _HRESULT_TYPEDEF_(0x8876086c)
+#endif
+
 #endif  /* __VKD3D_UTILS_PRIVATE_H */
diff --git a/tests/hlsl_d3d12.c b/tests/hlsl_d3d12.c
index ff29f1f7..de3737f6 100644
--- a/tests/hlsl_d3d12.c
+++ b/tests/hlsl_d3d12.c
@@ -20,6 +20,10 @@
 #include "d3d12_crosstest.h"
 #include "vkd3d_common.h"
 
+#ifndef D3DERR_INVALIDCALL
+#define D3DERR_INVALIDCALL 0x8876086c
+#endif
+
 struct test_options test_options = {0};
 
 #define check_preprocess(a, b, c, d, e) check_preprocess_(__LINE__, a, b, c, d, e)
@@ -602,6 +606,25 @@ static void test_thread_id(void)
     destroy_test_context(&context);
 }
 
+static void test_create_blob(void)
+{
+    unsigned int refcount;
+    ID3D10Blob *blob;
+    HRESULT hr;
+
+    hr = D3DCreateBlob(1, NULL);
+    ok(hr == D3DERR_INVALIDCALL, "Got hr %#x.\n", hr);
+
+    hr = D3DCreateBlob(0, NULL);
+    ok(hr == D3DERR_INVALIDCALL, "Got hr %#x.\n", hr);
+
+    hr = D3DCreateBlob(0, &blob);
+    ok(hr == S_OK, "Got hr %#x.\n", hr);
+
+    refcount = ID3D10Blob_Release(blob);
+    ok(!refcount, "Got refcount %u.\n", refcount);
+}
+
 START_TEST(hlsl_d3d12)
 {
     parse_args(argc, argv);
@@ -610,4 +633,5 @@ START_TEST(hlsl_d3d12)
 
     run_test(test_preprocess);
     run_test(test_thread_id);
+    run_test(test_create_blob);
 }