Giovanni Mascellani : vkd3d-shader/ir: Validate index count for NULL registers.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: c8676829829514c91f078f282d474a2abdfa5aab
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/c8676829829514c91f078f282d474a...

Author: Giovanni Mascellani <gmascellani(a)codeweavers.com>
Date:   Wed Nov  8 23:12:30 2023 +0100

vkd3d-shader/ir: Validate index count for NULL registers.

---

 libs/vkd3d-shader/ir.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c
index c2bad117..0f8d596b 100644
--- a/libs/vkd3d-shader/ir.c
+++ b/libs/vkd3d-shader/ir.c
@@ -1542,6 +1542,12 @@ static void vsir_validate_register(struct validation_context *ctx,
                         reg->idx[0].offset, temp_count);
             break;
 
+        case VKD3DSPR_NULL:
+            if (reg->idx_count != 0)
+                validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INDEX_COUNT, "Invalid index count %u for a NULL register.",
+                        reg->idx_count);
+            break;
+
         default:
             break;
     }