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ivshmem: fix memory backend leak 

object_new() returns a new backend with refcount == 1 and
then later object_property_add_child() increases refcount to 2
So when ivshmem is destroyed, the backend it has created isn't
destroyed along with it as children cleanup will bring
backend's refcount only to 1, which leaks backend including
resources it is using.

Drop the original reference from object_new() once backend
is attached to its parent.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1541069086-167036-1-git-send-email-imammedo@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Fixes: 5503e28504
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
master
Igor Mammedov 2018-11-01 11:44:46 +01:00 committed by Paolo Bonzini
parent d4715481de
commit bce410a33b
1 changed files with 1 additions and 0 deletions
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hw/misc/ivshmem.c
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@ -1279,6 +1279,7 @@ static void desugar_shm(IVShmemState *s)
object_property_set_bool(obj, true, "share", &error_abort);
object_property_add_child(OBJECT(s), "internal-shm-backend", obj,
&error_abort);
object_unref(obj);
user_creatable_complete(obj, &error_abort);
s->hostmem = MEMORY_BACKEND(obj);
}