From d50be5295c49be1b6024f5902948b52e683b4c23 Mon Sep 17 00:00:00 2001
From: lizhengui <lizhengui@huawei.com>
Date: Wed, 9 Sep 2020 14:18:35 +0800
Subject: [PATCH] lm32: do not leak memory on object_new/object_unref
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Bottom halves and ptimers are malloced, but nothing in these
files is freeing memory allocated by instance_init.  Since
these are sysctl devices that are never unrealized, just moving
the allocations to realize is enough to avoid the leak in
practice (and also to avoid upsetting asan when running
device-introspect-test).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/timer/lm32_timer.c       |  6 +++---
 hw/timer/milkymist-sysctl.c | 10 +++++-----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/hw/timer/lm32_timer.c b/hw/timer/lm32_timer.c
index 6ce876c6..13f15825 100644
--- a/hw/timer/lm32_timer.c
+++ b/hw/timer/lm32_timer.c
@@ -184,9 +184,6 @@ static void lm32_timer_init(Object *obj)
 
     sysbus_init_irq(dev, &s->irq);
 
-    s->bh = qemu_bh_new(timer_hit, s);
-    s->ptimer = ptimer_init(s->bh, PTIMER_POLICY_DEFAULT);
-
     memory_region_init_io(&s->iomem, obj, &timer_ops, s,
                           "timer", R_MAX * 4);
     sysbus_init_mmio(dev, &s->iomem);
@@ -196,6 +193,9 @@ static void lm32_timer_realize(DeviceState *dev, Error **errp)
 {
     LM32TimerState *s = LM32_TIMER(dev);
 
+    s->bh = qemu_bh_new(timer_hit, s);
+    s->ptimer = ptimer_init(s->bh, PTIMER_POLICY_DEFAULT);
+
     ptimer_set_freq(s->ptimer, s->freq_hz);
 }
 
diff --git a/hw/timer/milkymist-sysctl.c b/hw/timer/milkymist-sysctl.c
index a9d25087..2f1ecc6d 100644
--- a/hw/timer/milkymist-sysctl.c
+++ b/hw/timer/milkymist-sysctl.c
@@ -280,11 +280,6 @@ static void milkymist_sysctl_init(Object *obj)
     sysbus_init_irq(dev, &s->timer0_irq);
     sysbus_init_irq(dev, &s->timer1_irq);
 
-    s->bh0 = qemu_bh_new(timer0_hit, s);
-    s->bh1 = qemu_bh_new(timer1_hit, s);
-    s->ptimer0 = ptimer_init(s->bh0, PTIMER_POLICY_DEFAULT);
-    s->ptimer1 = ptimer_init(s->bh1, PTIMER_POLICY_DEFAULT);
-
     memory_region_init_io(&s->regs_region, obj, &sysctl_mmio_ops, s,
             "milkymist-sysctl", R_MAX * 4);
     sysbus_init_mmio(dev, &s->regs_region);
@@ -294,6 +289,11 @@ static void milkymist_sysctl_realize(DeviceState *dev, Error **errp)
 {
     MilkymistSysctlState *s = MILKYMIST_SYSCTL(dev);
 
+    s->bh0 = qemu_bh_new(timer0_hit, s);
+    s->bh1 = qemu_bh_new(timer1_hit, s);
+    s->ptimer0 = ptimer_init(s->bh0, PTIMER_POLICY_DEFAULT);
+    s->ptimer1 = ptimer_init(s->bh1, PTIMER_POLICY_DEFAULT);
+
     ptimer_set_freq(s->ptimer0, s->freq_hz);
     ptimer_set_freq(s->ptimer1, s->freq_hz);
 }
-- 
2.19.1