[PATCH v4 12/13] softmmu/cpus: Free cpu->thread in generic_destroy_vcpu_thread()

["Philippe Mathieu-Daudé" <philippe.mathieu.daude@gmail.com>]

From: Mark Kanda <mark.kanda@oracle.com>

Free cpu->thread in a new AccelOpsClass::destroy_vcpu_thread() handler
generic_destroy_vcpu_thread().

vCPU hotunplug related leak reported by Valgrind:

  ==102631== 8 bytes in 1 blocks are definitely lost in loss record 1,037 of 8,555
  ==102631==    at 0x4C3ADBB: calloc (vg_replace_malloc.c:1117)
  ==102631==    by 0x69EE4CD: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.5600.4)
  ==102631==    by 0x92443A: kvm_start_vcpu_thread (kvm-accel-ops.c:68)
  ==102631==    by 0x4505C2: qemu_init_vcpu (cpus.c:643)
  ==102631==    by 0x76B4D1: x86_cpu_realizefn (cpu.c:6520)
  ==102631==    by 0x9344A7: device_set_realized (qdev.c:531)
  ==102631==    by 0x93E329: property_set_bool (object.c:2273)
  ==102631==    by 0x93C2F8: object_property_set (object.c:1408)
  ==102631==    by 0x940796: object_property_set_qobject (qom-qobject.c:28)
  ==102631==    by 0x93C663: object_property_set_bool (object.c:1477)
  ==102631==    by 0x933D3B: qdev_realize (qdev.c:333)
  ==102631==    by 0x455EC4: qdev_device_add_from_qdict (qdev-monitor.c:713)

Signed-off-by: Mark Kanda <mark.kanda@oracle.com>
Message-Id: <20220321141409.3112932-3-mark.kanda@oracle.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 softmmu/cpus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 37325b3b8d..efa8397f04 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -619,6 +619,7 @@ static void common_vcpu_thread_create(CPUState *cpu)
 
 static void common_vcpu_thread_destroy(CPUState *cpu)
 {
+    g_free(cpu->thread);
 }
 
 void cpu_remove_sync(CPUState *cpu)
-- 
2.35.1