Re: [PATCH 02/12] macfb: fix invalid object reference in macfb_common_realize()

[BALATON Zoltan]

On Sat, 2 Oct 2021, Mark Cave-Ayland wrote:
> During realize memory_region_init_ram_nomigrate() is used to initialise the RAM
> memory region used for the framebuffer but the owner object reference is
> incorrect since MacFbState is a typedef and not a QOM type.
>
> Change the memory region owner to be the corresponding DeviceState to fix the
> issue and prevent random crashes during macfb_common_realize().
>
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>

> ---
> hw/display/macfb.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/display/macfb.c b/hw/display/macfb.c
> index 2b747a8de8..815870f2fe 100644
> --- a/hw/display/macfb.c
> +++ b/hw/display/macfb.c
> @@ -365,7 +365,7 @@ static void macfb_common_realize(DeviceState *dev, 
> MacfbState *s, Error **errp)
>     memory_region_init_io(&s->mem_ctrl, OBJECT(dev), &macfb_ctrl_ops, s,
>                           "macfb-ctrl", 0x1000);
>
> -    memory_region_init_ram_nomigrate(&s->mem_vram, OBJECT(s), "macfb-vram",
> +    memory_region_init_ram_nomigrate(&s->mem_vram, OBJECT(dev), "macfb-vram",
>                                      MACFB_VRAM_SIZE, errp);
>     s->vram = memory_region_get_ram_ptr(&s->mem_vram);
>     s->vram_bit_mask = MACFB_VRAM_SIZE - 1;