Re: [PATCH v2] ACPI: Avoid infinite recursion when dump-vmstate

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Nov 12, 2020 at 10:06:38AM +0800, Peng Liang wrote:
> There is a field with vmstate_ghes_state as vmsd in vmstate_ghes_state,
> which will lead to infinite recursion in dump_vmstate_vmsd.
> 
> Fixes: a08a64627b ("ACPI: Record the Generic Error Status Block address")
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Peng Liang <liangpeng10@huawei.com>
> Acked-by: Igor Mammedov <imammedo@redhat.com>

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

> ---
>  hw/acpi/generic_event_device.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index 6df400e1ee16..5454be67d5f0 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -322,6 +322,16 @@ static const VMStateDescription vmstate_ged_state = {
>      }
>  };
>  
> +static const VMStateDescription vmstate_ghes = {
> +    .name = "acpi-ghes",
> +    .version_id = 1,
> +    .minimum_version_id = 1,
> +    .fields     = (VMStateField[]) {
> +        VMSTATE_UINT64(ghes_addr_le, AcpiGhesState),
> +        VMSTATE_END_OF_LIST()
> +    },
> +};
> +
>  static bool ghes_needed(void *opaque)
>  {
>      AcpiGedState *s = opaque;
> @@ -335,7 +345,7 @@ static const VMStateDescription vmstate_ghes_state = {
>      .needed = ghes_needed,
>      .fields      = (VMStateField[]) {
>          VMSTATE_STRUCT(ghes_state, AcpiGedState, 1,
> -                       vmstate_ghes_state, AcpiGhesState),
> +                       vmstate_ghes, AcpiGhesState),
>          VMSTATE_END_OF_LIST()
>      }
>  };
> -- 
> 2.26.2