Re: [Qemu-stable] [PATCH v3 6/7] qdev: Protect device-list-properties against broken devices

[Eduardo Habkost]

On Thu, Sep 24, 2015 at 08:57:21PM +0200, Markus Armbruster wrote:
[...]
> diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
> index ff249af..7692090 100644
> --- a/hw/arm/allwinner-a10.c
> +++ b/hw/arm/allwinner-a10.c
> @@ -103,6 +103,8 @@ static void aw_a10_class_init(ObjectClass *oc, void *data)
>      DeviceClass *dc = DEVICE_CLASS(oc);
>  
>      dc->realize = aw_a10_realize;
> +    /* Reason: creates a CPU, thus use after free(), see cpu_class_init() */
> +    dc->cannot_even_create_with_object_new_yet = true;

The comments at aw_a10_class_init(), digic_class_init(),
fsl_imx25_class_init(), fsl_imx31_class_init(), and
xlnx_zynqmp_class_init() are now outdated, as cpu_class_init() doesn't
set cannot_even_create_with_object_new_yet anymore.

We could do this:
* Update the comments to "Reason: creates an ARM CPU, thus use after
  free(), see arm_cpu_class_init()"
* Add a note at arm_cpu_class_init() saying that we can probably
  unset cannot_even_create_with_object_new_yet in those functions
  once we fix TYPE_ARM_CPU

-- 
Eduardo