tests: Add test to trigger transfer IOV overflow

Related #138

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>

tests/test_fuzzer_formats.c

@@ -574,6 +574,46 @@ static void test_format_is_has_alpha_nullptr_deref_trigger_legal_resource()
    virgl_renderer_submit_cmd((void *) cmd, ctx_id, VIRGL_OBJ_SAMPLER_VIEW_SIZE + 1);
 }
 
+static void test_heap_overflow_vrend_renderer_transfer_write_iov()
+{
+   struct virgl_renderer_resource_create_args args;
+   args.handle = 4;
+   args.target = 0;
+   args.format = 4;
+   args.bind = 131072;
+   args.width = 0;
+   args.height = 1;
+   args.depth = 1;
+   args.array_size = 0;
+   args.last_level = 0;
+   args.nr_samples = 0;
+   args.flags = 0;
+
+   virgl_renderer_resource_create(&args, NULL, 0);
+   virgl_renderer_ctx_attach_resource(ctx_id, args.handle);
+
+   char data[16];
+   memset(data, 'A', 16);
+   uint32_t cmd[11 + 4 +1];
+
+   int i = 0;
+   cmd[i++] = (11+4) << 16 | 0 << 8 | VIRGL_CCMD_RESOURCE_INLINE_WRITE;
+   cmd[i++] = 4; // handle
+   cmd[i++] = 0; // level
+   cmd[i++] = 0; // usage
+   cmd[i++] = 0; // stride
+   cmd[i++] = 0; // layer_stride
+   cmd[i++] = 0; // x
+   cmd[i++] = 0; // y
+   cmd[i++] = 0; // z
+   cmd[i++] = 0x80000000; // w
+   cmd[i++] = 0; // h
+   cmd[i++] = 0; // d
+   memcpy(&cmd[i], data, 16);
+
+   virgl_renderer_submit_cmd((void *) cmd, ctx_id, 11 + 4 + 1);
+}
+
 int main()
 {
    initialize_environment();
@@ -589,6 +629,8 @@ int main()
    test_format_is_has_alpha_nullptr_deref_trigger_original();
    test_format_is_has_alpha_nullptr_deref_trigger_legal_resource();
 
+   test_heap_overflow_vrend_renderer_transfer_write_iov();
+
    virgl_renderer_context_destroy(ctx_id);
    virgl_renderer_cleanup(&cookie);
    virgl_egl_destroy(test_egl);