Since 7f5d9b206d1e ("object-add: don't create return value if failed"), qmp_object_add() don't write any value in 'ret_data', thus has random data. Then qobject_unref() fails and abort().
Fix by initialising 'ret_data' properly. Fixes: 5f07c4d60d09 ("qapi: Flatten object-add") Signed-off-by: Anthony PERARD <anthony.per...@citrix.com> Reviewed-by: Markus Armbruster <arm...@redhat.com> Message-Id: <20200406164207.1446817-1-anthony.per...@citrix.com> --- hw/block/xen-block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c index 07bb32e22b51..99cb4c67cb09 100644 --- a/hw/block/xen-block.c +++ b/hw/block/xen-block.c @@ -860,7 +860,7 @@ static XenBlockIOThread *xen_block_iothread_create(const char *id, XenBlockIOThread *iothread = g_new(XenBlockIOThread, 1); Error *local_err = NULL; QDict *opts; - QObject *ret_data; + QObject *ret_data = NULL; iothread->id = g_strdup(id); -- Anthony PERARD