Re: [Qemu-devel] [PATCH for-2.12] hw/misc/macio: Fix crash when listing device properties of macio device

[Philippe Mathieu-Daudé]

On 03/19/2018 03:00 PM, Thomas Huth wrote:
> The macio-newworld device can currently be used to abort QEMU unexpectedly:
> 
> $ ppc-softmmu/qemu-system-ppc -S -M ref405ep,accel=qtest -qmp stdio
> {"QMP": {"version": {"qemu": {"micro": 50, "minor": 11, "major": 2},
>  "package": "build-all"}, "capabilities": []}}
> { 'execute': 'qmp_capabilities' }
> {"return": {}}
> { 'execute': 'device-list-properties',
>   'arguments': {'typename': 'macio-newworld'}}
> Unexpected error in qemu_chr_fe_init() at chardev/char-fe.c:222:
> Device 'serial0' is in use
> Aborted (core dumped)
> 
> qdev properties should be set during realize(), not during instance_init(),
> so move the related code there to fix this problem.

Oops I missed that.

> 
> Signed-off-by: Thomas Huth <address@hidden>

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>

> ---
>  hw/misc/macio/macio.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/hw/misc/macio/macio.c b/hw/misc/macio/macio.c
> index 454244f..b74a657 100644
> --- a/hw/misc/macio/macio.c
> +++ b/hw/misc/macio/macio.c
> @@ -115,6 +115,13 @@ static void macio_common_realize(PCIDevice *d, Error 
> **errp)
>      memory_region_add_subregion(&s->bar, 0x16000,
>                                  sysbus_mmio_get_region(sysbus_dev, 0));
>  
> +    qdev_prop_set_uint32(DEVICE(&s->escc), "disabled", 0);
> +    qdev_prop_set_uint32(DEVICE(&s->escc), "frequency", ESCC_CLOCK);
> +    qdev_prop_set_uint32(DEVICE(&s->escc), "it_shift", 4);
> +    qdev_prop_set_chr(DEVICE(&s->escc), "chrA", serial_hds[0]);
> +    qdev_prop_set_chr(DEVICE(&s->escc), "chrB", serial_hds[1]);
> +    qdev_prop_set_uint32(DEVICE(&s->escc), "chnBtype", escc_serial);
> +    qdev_prop_set_uint32(DEVICE(&s->escc), "chnAtype", escc_serial);
>      object_property_set_bool(OBJECT(&s->escc), true, "realized", &err);
>      if (err) {
>          error_propagate(errp, err);
> @@ -341,13 +348,6 @@ static void macio_instance_init(Object *obj)
>      object_property_add_child(obj, "dbdma", OBJECT(&s->dbdma), NULL);
>  
>      object_initialize(&s->escc, sizeof(s->escc), TYPE_ESCC);
> -    qdev_prop_set_uint32(DEVICE(&s->escc), "disabled", 0);
> -    qdev_prop_set_uint32(DEVICE(&s->escc), "frequency", ESCC_CLOCK);
> -    qdev_prop_set_uint32(DEVICE(&s->escc), "it_shift", 4);
> -    qdev_prop_set_chr(DEVICE(&s->escc), "chrA", serial_hds[0]);
> -    qdev_prop_set_chr(DEVICE(&s->escc), "chrB", serial_hds[1]);
> -    qdev_prop_set_uint32(DEVICE(&s->escc), "chnBtype", escc_serial);
> -    qdev_prop_set_uint32(DEVICE(&s->escc), "chnAtype", escc_serial);
>      qdev_set_parent_bus(DEVICE(&s->escc), sysbus_get_default());
>      object_property_add_child(obj, "escc", OBJECT(&s->escc), NULL);
>  }
>