Re: [PATCH 2/3] stm32f2xx_timer: delay timer_new to avoid memleaks

[Alistair Francis <alistair23@gmail.com>]

On Tue, Feb 4, 2020 at 11:09 PM <pannengyuan@huawei.com> wrote:
>
> From: Pan Nengyuan <pannengyuan@huawei.com>
>
> There is a memory leak when we call 'device_list_properties' with typename = stm32f2xx_timer. It's easy to reproduce as follow:
>
>     virsh qemu-monitor-command vm1 --pretty '{"execute": "device-list-properties", "arguments": {"typename": "stm32f2xx_timer"}}'
>
> This patch delay timer_new to fix this memleaks.
>
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> Cc: Alistair Francis <alistair@alistair23.me>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/timer/stm32f2xx_timer.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/hw/timer/stm32f2xx_timer.c b/hw/timer/stm32f2xx_timer.c
> index fb370ce0f0..06ec8a02c2 100644
> --- a/hw/timer/stm32f2xx_timer.c
> +++ b/hw/timer/stm32f2xx_timer.c
> @@ -314,7 +314,11 @@ static void stm32f2xx_timer_init(Object *obj)
>      memory_region_init_io(&s->iomem, obj, &stm32f2xx_timer_ops, s,
>                            "stm32f2xx_timer", 0x400);
>      sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
> +}
>
> +static void stm32f2xx_timer_realize(DeviceState *dev, Error **errp)
> +{
> +    STM32F2XXTimerState *s = STM32F2XXTIMER(dev);
>      s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, stm32f2xx_timer_interrupt, s);
>  }
>
> @@ -325,6 +329,7 @@ static void stm32f2xx_timer_class_init(ObjectClass *klass, void *data)
>      dc->reset = stm32f2xx_timer_reset;
>      device_class_set_props(dc, stm32f2xx_timer_properties);
>      dc->vmsd = &vmstate_stm32f2xx_timer;
> +    dc->realize = stm32f2xx_timer_realize;
>  }
>
>  static const TypeInfo stm32f2xx_timer_info = {
> --
> 2.21.0.windows.1
>
>
>