Re: [PATCH for-9.2 4/6] hw/nvram/xlnx-zynqmp-efuse: Call register_finalize_block

[Alistair Francis]

On Fri, Aug 23, 2024 at 2:23 AM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> The TYPE_XLNX_ZYNQMP_EFUSE device creates a register block with
> register_init_block32() in its instance_init method; we must
> therefore destroy it in our instance_finalize method to avoid a leak
> in the QOM introspection "init-inspect-finalize" lifecycle:
>
> Direct leak of 304 byte(s) in 1 object(s) allocated from:
>     #0 0x55f3ff5839d8 in __interceptor_calloc 
> (/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/asan/qemu-system-aarch64+0x294d9d8)
>  (BuildId: 23cf931c66865a71b6cc4da95156d03bc106fa72)
>     #1 0x7f3f31c6bc50 in g_malloc0 
> debian/build/deb/../../../glib/gmem.c:161:13
>     #2 0x55f3ff9b8c5d in register_init_block hw/core/register.c:248:34
>     #3 0x55f3ff9b96be in register_init_block32 hw/core/register.c:299:12
>     #4 0x55f4005e5b25 in efuse_ctrl_init 
> hw/nvram/xlnx-versal-efuse-ctrl.c:718:9
>     #5 0x55f40254afb1 in object_init_with_type qom/object.c:420:9
>     #6 0x55f40253228b in object_initialize_with_type qom/object.c:562:5
>     #7 0x55f402533b2d in object_new_with_type qom/object.c:782:5
>     #8 0x55f402533c01 in object_new qom/object.c:797:12
>     #9 0x55f402d31a2d in qmp_device_list_properties qom/qom-qmp-cmds.c:144:11
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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

Alistair

> ---
>  include/hw/nvram/xlnx-zynqmp-efuse.h |  1 +
>  hw/nvram/xlnx-zynqmp-efuse.c         | 13 ++++++++++---
>  2 files changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/include/hw/nvram/xlnx-zynqmp-efuse.h 
> b/include/hw/nvram/xlnx-zynqmp-efuse.h
> index f5beacc2e6a..7fb12df3fbb 100644
> --- a/include/hw/nvram/xlnx-zynqmp-efuse.h
> +++ b/include/hw/nvram/xlnx-zynqmp-efuse.h
> @@ -37,6 +37,7 @@ struct XlnxZynqMPEFuse {
>      qemu_irq irq;
>
>      XlnxEFuse *efuse;
> +    RegisterInfoArray *reg_array;
>      uint32_t regs[XLNX_ZYNQMP_EFUSE_R_MAX];
>      RegisterInfo regs_info[XLNX_ZYNQMP_EFUSE_R_MAX];
>  };
> diff --git a/hw/nvram/xlnx-zynqmp-efuse.c b/hw/nvram/xlnx-zynqmp-efuse.c
> index 2d465f0fc6a..4e2d1b9d1e7 100644
> --- a/hw/nvram/xlnx-zynqmp-efuse.c
> +++ b/hw/nvram/xlnx-zynqmp-efuse.c
> @@ -803,9 +803,8 @@ static void zynqmp_efuse_init(Object *obj)
>  {
>      XlnxZynqMPEFuse *s = XLNX_ZYNQMP_EFUSE(obj);
>      SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> -    RegisterInfoArray *reg_array;
>
> -    reg_array =
> +    s->reg_array =
>          register_init_block32(DEVICE(obj), zynqmp_efuse_regs_info,
>                                ARRAY_SIZE(zynqmp_efuse_regs_info),
>                                s->regs_info, s->regs,
> @@ -813,10 +812,17 @@ static void zynqmp_efuse_init(Object *obj)
>                                ZYNQMP_EFUSE_ERR_DEBUG,
>                                R_MAX * 4);
>
> -    sysbus_init_mmio(sbd, &reg_array->mem);
> +    sysbus_init_mmio(sbd, &s->reg_array->mem);
>      sysbus_init_irq(sbd, &s->irq);
>  }
>
> +static void zynqmp_efuse_finalize(Object *obj)
> +{
> +    XlnxZynqMPEFuse *s = XLNX_ZYNQMP_EFUSE(obj);
> +
> +    register_finalize_block(s->reg_array);
> +}
> +
>  static const VMStateDescription vmstate_efuse = {
>      .name = TYPE_XLNX_ZYNQMP_EFUSE,
>      .version_id = 1,
> @@ -853,6 +859,7 @@ static const TypeInfo efuse_info = {
>      .instance_size = sizeof(XlnxZynqMPEFuse),
>      .class_init    = zynqmp_efuse_class_init,
>      .instance_init = zynqmp_efuse_init,
> +    .instance_finalize = zynqmp_efuse_finalize,
>  };
>
>  static void efuse_register_types(void)
> --
> 2.34.1
>
>