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[PATCH 2/3] misc/mos6522: Use timer_free() in the finalize function to a
From: |
Gan Qixin |
Subject: |
[PATCH 2/3] misc/mos6522: Use timer_free() in the finalize function to avoid memleak |
Date: |
Fri, 4 Dec 2020 16:12:08 +0800 |
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>
---
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,
--
2.27.0