[Qemu-devel] [PATCH v2 1/4] spapr_cpu_core: drop reference on ICP object during CPU realization

[Greg Kurz]

When a piece of code allocates an object, it implicitely gets a reference
on it. If it then makes that object a child property of another object, it
should drop its own reference at some point otherwise the child object can
never be finalized. The current code hence leaks one ICP object per CPU
when hot-removing a core.

Failing to add a newly allocated ICP object to the CPU is a bug. While here,
let's ensure QEMU aborts if this ever happens.

Signed-off-by: Greg Kurz <address@hidden>
---
 hw/ppc/spapr_cpu_core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 1df1404ea52d..ff7058ecc00e 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -143,7 +143,8 @@ static void spapr_cpu_core_realize_child(Object *child, 
Error **errp)
     Object *obj;
 
     obj = object_new(spapr->icp_type);
-    object_property_add_child(OBJECT(cpu), "icp", obj, NULL);
+    object_property_add_child(OBJECT(cpu), "icp", obj, &error_abort);
+    object_unref(obj);
     object_property_add_const_link(obj, "xics", OBJECT(spapr), &error_abort);
     object_property_set_bool(obj, true, "realized", &local_err);
     if (local_err) {