hw/usb/hcd-ehci-sysbus: Free USBPacket on instance finalize()

When building with --enable-sanitizers we get:

  Direct leak of 32 byte(s) in 2 object(s) allocated from:
      #0 0x5618479ec7cf in malloc (qemu-system-aarch64+0x233b7cf)
      #1 0x7f675745f958 in g_malloc (/lib64/libglib-2.0.so.0+0x58958)
      qemu#2 0x561847f02ca2 in usb_packet_init hw/usb/core.c:531:5
      qemu#3 0x561848df4df4 in usb_ehci_init hw/usb/hcd-ehci.c:2575:5
      qemu#4 0x561847c119ac in ehci_sysbus_init hw/usb/hcd-ehci-sysbus.c:73:5
      qemu#5 0x56184a5bdab8 in object_init_with_type qom/object.c:375:9
      qemu#6 0x56184a5bd955 in object_init_with_type qom/object.c:371:9
      qemu#7 0x56184a5a2bda in object_initialize_with_type qom/object.c:517:5
      qemu#8 0x56184a5a24d5 in object_initialize qom/object.c:536:5
      qemu#9 0x56184a5a2f6c in object_initialize_child_with_propsv qom/object.c:566:5
      qemu#10 0x56184a5a2e60 in object_initialize_child_with_props qom/object.c:549:10
      qemu#11 0x56184a5a3a1e in object_initialize_child_internal qom/object.c:603:5
      qemu#12 0x561849542d18 in npcm7xx_init hw/arm/npcm7xx.c:427:5

Similarly to commit d710e1e ("usb: ehci: fix memory leak in
ehci"), fix by calling usb_ehci_finalize() to free the USBPacket.

Fixes: 7341ea0
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Gerd Hoffmann <[email protected]>

hw/usb/hcd-ehci-sysbus.c

@@ -74,6 +74,14 @@ static void ehci_sysbus_init(Object *obj)
     sysbus_init_mmio(d, &s->mem);
 }
 
+static void ehci_sysbus_finalize(Object *obj)
+{
+    EHCISysBusState *i = SYS_BUS_EHCI(obj);
+    EHCIState *s = &i->ehci;
+
+    usb_ehci_finalize(s);
+}
+
 static void ehci_sysbus_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -94,6 +102,7 @@ static const TypeInfo ehci_type_info = {
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(EHCISysBusState),
     .instance_init = ehci_sysbus_init,
+    .instance_finalize = ehci_sysbus_finalize,
     .abstract      = true,
     .class_init    = ehci_sysbus_class_init,
     .class_size    = sizeof(SysBusEHCIClass),