Henri Verbeet : libs/vkd3d-shader: Validate the DXBC version.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 2d8e2fbe8699e96c5596fe44204b60ace363a0f8
URL:    https://source.winehq.org/git/vkd3d.git/?a=commit;h=2d8e2fbe8699e96c5596fe44204b60ace363a0f8

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Mon Jan 15 20:07:24 2018 +0330

libs/vkd3d-shader: Validate the DXBC version.

Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Józef Kucia <jkucia at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 libs/vkd3d-shader/dxbc.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/dxbc.c b/libs/vkd3d-shader/dxbc.c
index 6aa2ffa..331b619 100644
--- a/libs/vkd3d-shader/dxbc.c
+++ b/libs/vkd3d-shader/dxbc.c
@@ -1814,6 +1814,7 @@ static HRESULT parse_dxbc(const char *data, SIZE_T data_size,
     DWORD chunk_count;
     DWORD total_size;
     unsigned int i;
+    DWORD version;
     DWORD tag;
 
     read_dword(&ptr, &tag);
@@ -1828,7 +1829,13 @@ static HRESULT parse_dxbc(const char *data, SIZE_T data_size,
     WARN("Ignoring DXBC checksum.\n");
     skip_dword_unknown(&ptr, 4);
 
-    skip_dword_unknown(&ptr, 1); /* It seems to always be 0x00000001. */
+    read_dword(&ptr, &version);
+    TRACE("version: %#x.\n", version);
+    if (version != 0x00000001)
+    {
+        WARN("Got unexpected DXBC version %#x.\n", version);
+        return E_INVALIDARG;
+    }
 
     read_dword(&ptr, &total_size);
     TRACE("total size: %#x\n", total_size);