--- linux-3.9.9-201.fc18.x86_64/drivers/gpu/drm/nouveau/nouveau_bo.c	2013-04-29 03:36:01.000000000 +0300
+++ linux-3.9.9-201.fc18.x86_64/drivers/gpu/drm/nouveau/nouveau_bo.c	2013-07-18 20:23:48.116008533 +0300
@@ -949,6 +949,10 @@
 	struct nouveau_mem *node = mem->mm_node;
 	int ret;
 
+	if (WARN_ON(mem->mem_type != TTM_PL_VRAM && !node->pages)) {
+		return -EINVAL;
+	}
+
 	ret = nouveau_vm_get(nv_client(chan->cli)->vm, mem->num_pages <<
 			     PAGE_SHIFT, node->page_shift,
 			     NV_MEM_ACCESS_RW, vma);