hw/misc/xlnx-versal-cfu: destroy fifo in finalize

Since the TYPE_XNLX_VERSAL_CFU_FDRO device creates a FIFO in its
instance_init method, we must destroy the FIFO in instance_finalize
to avoid a memory leak for the QOM introspection
"instantiate-examine-finalize" cycle:

Direct leak of 8192 byte(s) in 1 object(s) allocated from:
    #0 0x55ec89eae7ee in malloc (/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/asan/qemu-system-aarch64+0x294d7ee) (BuildId: 6d508874816cc47d17c8dd775e8f809ae520e8cb)
    #1 0x7f697018f738 in g_malloc debian/build/deb/../../../glib/gmem.c:128:13
    #2 0x55ec8d98d98d in fifo8_create util/fifo8.c:27:18
    #3 0x55ec8aa2a624 in fifo32_create /mnt/nvmedisk/linaro/qemu-from-laptop/qemu/include/qemu/fifo32.h:35:5
    #4 0x55ec8aa2a33c in cfu_fdro_init hw/misc/xlnx-versal-cfu.c:397:5
    #5 0x55ec8ce75da1 in object_init_with_type qom/object.c:420:9
    #6 0x55ec8ce5d07b in object_initialize_with_type qom/object.c:562:5
    #7 0x55ec8ce5e91d in object_new_with_type qom/object.c:782:5
    #8 0x55ec8ce5e9f1 in object_new qom/object.c:797:12
    #9 0x55ec8d65c81d in qmp_device_list_properties qom/qom-qmp-cmds.c:144:11

Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Edgar E. Iglesias <[email protected]>
Reviewed-by: Francisco Iglesias <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
Message-id: [email protected]

hw/misc/xlnx-versal-cfu.c

@@ -397,6 +397,13 @@ static void cfu_fdro_init(Object *obj)
     fifo32_create(&s->fdro_data, 8 * KiB / sizeof(uint32_t));
 }
 
+static void cfu_fdro_finalize(Object *obj)
+{
+    XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
+
+    fifo32_destroy(&s->fdro_data);
+}
+
 static void cfu_fdro_reset_enter(Object *obj, ResetType type)
 {
     XlnxVersalCFUFDRO *s = XLNX_VERSAL_CFU_FDRO(obj);
@@ -539,6 +546,7 @@ static const TypeInfo cfu_fdro_info = {
     .instance_size = sizeof(XlnxVersalCFUFDRO),
     .class_init    = cfu_fdro_class_init,
     .instance_init = cfu_fdro_init,
+    .instance_finalize = cfu_fdro_finalize,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_XLNX_CFI_IF },
         { }