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Re: [PATCH 2/3] misc/mos6522: Use timer_free() in the finalize function
From: |
David Gibson |
Subject: |
Re: [PATCH 2/3] misc/mos6522: Use timer_free() in the finalize function to avoid memleak |
Date: |
Sat, 5 Dec 2020 20:56:48 +1100 |
On Fri, Dec 04, 2020 at 04:12:08PM +0800, Gan Qixin wrote:
> When running device-introspect-test, a memory leak occurred in the
> mos6522_init
> function, this patch use timer_free() in the finalize function to fix it.
>
> ASAN shows memory leak stack:
>
> Direct leak of 96 byte(s) in 2 object(s) allocated from:
> #0 0xfffd5fe9e1f0 in __interceptor_calloc (/lib64/libasan.so.5+0xee1f0)
> #1 0xfffd5f7b6800 in g_malloc0 (/lib64/libglib-2.0.so.0+0x56800)
> #2 0xaaae50303d0c in timer_new_full qemu/include/qemu/timer.h:523
> #3 0xaaae50303d0c in timer_new qemu/include/qemu/timer.h:544
> #4 0xaaae50303d0c in timer_new_ns qemu/include/qemu/timer.h:562
> #5 0xaaae50303d0c in mos6522_init qemu/hw/misc/mos6522.c:490
> #6 0xaaae50b77d70 in object_init_with_type qemu/qom/object.c:371
> #7 0xaaae50b7ae84 in object_initialize_with_type qemu/qom/object.c:515
> #8 0xaaae50b7b0f8 in object_new_with_type qemu/qom/object.c:729
> #9 0xaaae50bb6d58 in qmp_device_list_properties
> qemu/qom/qom-qmp-cmds.c:153
> #10 0xaaae50d7e1dc in qmp_marshal_device_list_properties
> qemu/qapi/qapi-commands-qdev.c:59
> #11 0xaaae50dc87a0 in do_qmp_dispatch_bh qemu/qapi/qmp-dispatch.c:110
> #12 0xaaae50d931a0 in aio_bh_call qemu/util/async.c:136
>
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Gan Qixin <ganqixin@huawei.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> Cc: David Gibson <david@gibson.dropbear.id.au>
> ---
> hw/misc/mos6522.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
> index ac4cd1d58e..0236eeece1 100644
> --- a/hw/misc/mos6522.c
> +++ b/hw/misc/mos6522.c
> @@ -490,6 +490,16 @@ static void mos6522_init(Object *obj)
> s->timers[1].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer2, s);
> }
>
> +static void mos6522_finalize(Object *obj)
> +{
> + MOS6522State *s = MOS6522(obj);
> +
> + timer_del(s->timers[0].timer);
> + timer_free(s->timers[0].timer);
> + timer_del(s->timers[1].timer);
> + timer_free(s->timers[1].timer);
> +}
> +
> static Property mos6522_properties[] = {
> DEFINE_PROP_UINT64("frequency", MOS6522State, frequency, 0),
> DEFINE_PROP_END_OF_LIST()
> @@ -519,6 +529,7 @@ static const TypeInfo mos6522_type_info = {
> .parent = TYPE_SYS_BUS_DEVICE,
> .instance_size = sizeof(MOS6522State),
> .instance_init = mos6522_init,
> + .instance_finalize = mos6522_finalize,
> .abstract = true,
> .class_size = sizeof(MOS6522DeviceClass),
> .class_init = mos6522_class_init,
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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