[PATCH 5/7] exynos4210_rtc: Use ptimer_free() in the finalize function to avoid memleaks

From: Gan Qixin <ganqixin@huawei.com>
To: <qemu-arm@nongnu.org>, <qemu-devel@nongnu.org>
Cc: peter.maydell@linaro.org, zhang.zhanghailiang@huawei.com,
	Igor Mitsyanko <i.mitsyanko@gmail.com>,
	Gan Qixin <ganqixin@huawei.com>,
	Euler Robot <euler.robot@huawei.com>,
	kuhn.chenqun@huawei.com
Subject: [PATCH 5/7] exynos4210_rtc: Use ptimer_free() in the finalize function to avoid memleaks
Date: Fri, 27 Nov 2020 15:18:01 +0800	[thread overview]
Message-ID: <20201127071803.2479462-6-ganqixin@huawei.com> (raw)
In-Reply-To: <20201127071803.2479462-1-ganqixin@huawei.com>

When running device-introspect-test, a memory leak occurred in the exynos4210_rtc_init
function, so use ptimer_free() in the finalize function to avoid it.

ASAN shows memory leak stack:

Indirect leak of 96 byte(s) in 1 object(s) allocated from:
    #0 0xffffab97e1f0 in __interceptor_calloc (/lib64/libasan.so.5+0xee1f0)
    #1 0xffffab256800 in g_malloc0 (/lib64/libglib-2.0.so.0+0x56800)
    #2 0xaaabf555db78 in ptimer_init /qemu/hw/core/ptimer.c:432
    #3 0xaaabf57b3934 in exynos4210_rtc_init /qemu/hw/rtc/exynos4210_rtc.c:567
    #4 0xaaabf6339f6c in object_initialize_with_type /qemu/qom/object.c:515
    #5 0xaaabf633a1e0 in object_new_with_type /qemu/qom/object.c:729
    #6 0xaaabf6375e40 in qmp_device_list_properties /qemu/qom/qom-qmp-cmds.c:153
    #7 0xaaabf653d8ec in qmp_marshal_device_list_properties /qemu/qapi/qapi-commands-qdev.c:59
    #8 0xaaabf6587d08 in do_qmp_dispatch_bh /qemu/qapi/qmp-dispatch.c:110
    #9 0xaaabf6552708 in aio_bh_call /qemu/util/async.c:136
    #10 0xaaabf6552708 in aio_bh_poll /qemu/util/async.c:164
    #11 0xaaabf655f19c in aio_dispatch /qemu/util/aio-posix.c:381
    #12 0xaaabf65523f4 in aio_ctx_dispatch /qemu/util/async.c:306

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Gan Qixin <ganqixin@huawei.com>
---
Cc: Igor Mitsyanko <i.mitsyanko@gmail.com>
---
 hw/rtc/exynos4210_rtc.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/hw/rtc/exynos4210_rtc.c b/hw/rtc/exynos4210_rtc.c
index 4c97624478..2f667fb010 100644
--- a/hw/rtc/exynos4210_rtc.c
+++ b/hw/rtc/exynos4210_rtc.c
@@ -584,6 +584,14 @@ static void exynos4210_rtc_init(Object *obj)
     sysbus_init_mmio(dev, &s->iomem);
 }
 
+static void exynos4210_rtc_finalize(Object *obj)
+{
+    Exynos4210RTCState *s = EXYNOS4210_RTC(obj);
+
+    ptimer_free(s->ptimer);
+    ptimer_free(s->ptimer_1Hz);
+}
+
 static void exynos4210_rtc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -593,11 +601,12 @@ static void exynos4210_rtc_class_init(ObjectClass *klass, void *data)
 }
 
 static const TypeInfo exynos4210_rtc_info = {
-    .name          = TYPE_EXYNOS4210_RTC,
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(Exynos4210RTCState),
-    .instance_init = exynos4210_rtc_init,
-    .class_init    = exynos4210_rtc_class_init,
+    .name              = TYPE_EXYNOS4210_RTC,
+    .parent            = TYPE_SYS_BUS_DEVICE,
+    .instance_size     = sizeof(Exynos4210RTCState),
+    .instance_init     = exynos4210_rtc_init,
+    .instance_finalize = exynos4210_rtc_finalize,
+    .class_init        = exynos4210_rtc_class_init,
 };
 
 static void exynos4210_rtc_register_types(void)
-- 
2.23.0


