What were you trying to do that didn't work?

When executing qom-set and then qom-get command, we got

qemu-kvm: ../qapi/qobject-output-visitor.c:95: void qobject_output_add_obj(QObjectOutputVisitor *, const char *, QObject *): Assertion `name' failed.

Please provide the package NVR for which the bug is seen:

qemu-kvm-9.1.0-8.el9
host/guest kernel-5.14.0-545.el9.aarch64+64k

How reproducible is this bug?:

80%

Steps to reproduce

Boot a guest
See attachment

Query balloon for several times
{"execute": "query-balloon", "id": "LMchrPWq"} for several times
actual: 8589934592

Evict the balloon
{"execute": "balloon", "arguments":

{"value": 7324303360}

, "id": "a0QeGtCC"}

Query balloon again
{"execute": "query-balloon", "id": "LMchrPWq"}
actual: 7324303360

Enable polling
{"execute": "qom-set", "arguments":

{"path": "/machine/peripheral/balloon0", "property": "guest-stats-polling-interval", "value": 2}

, "id": "1WprSrlz"}
{"execute": "qom-get", "arguments":

{"path": "/machine/peripheral/balloon0", "property": "guest-stats"}

, "id": "BHoS8Pbb"}

Then
qemu-kvm: ../qapi/qobject-output-visitor.c:95: void qobject_output_add_obj(QObjectOutputVisitor *, const char *, QObject *): Assertion `name' failed.

Expected results

No crash

Actual results

qemu-kvm: ../qapi/qobject-output-visitor.c:95: void qobject_output_add_obj(QObjectOutputVisitor *, const char *, QObject *): Assertion `name' failed.

Stack trace of thread 123787:
#0 0x0000ffff948a26e8 __pthread_kill_implementation (libc.so.6 + 0x826e8)
#1 0x0000ffff9485a87c raise (libc.so.6 + 0x3a87c)
#2 0x0000ffff94846fb4 abort (libc.so.6 + 0x26fb4)
#3 0x0000ffff948541f0 __assert_fail_base (libc.so.6 + 0x341f0)
#4 0x0000ffff94854260 __assert_fail (libc.so.6 + 0x34260)
#5 0x0000aaaab4172f50 qobject_output_add_obj (qemu-kvm + 0x902f50)
#6 0x0000aaaab4172b5c qobject_output_type_uint64 (qemu-kvm + 0x902b5c)
#7 0x0000aaaab3f5e0d4 balloon_stats_get_all (qemu-kvm + 0x6ee0d4)
#8 0x0000aaaab3fe317c object_property_get (qemu-kvm + 0x77317c)
#9 0x0000aaaab3fe6ad0 property_get_alias (qemu-kvm + 0x776ad0)
#10 0x0000aaaab3fe317c object_property_get (qemu-kvm + 0x77317c)
#11 0x0000aaaab3fe7fe4 object_property_get_qobject (qemu-kvm + 0x777fe4)
#12 0x0000aaaab4148b9c qmp_marshal_qom_get (qemu-kvm + 0x8d8b9c)
#13 0x0000aaaab4174f4c do_qmp_dispatch_bh (qemu-kvm + 0x904f4c)
#14 0x0000aaaab4198b0c aio_bh_poll (qemu-kvm + 0x928b0c)
#15 0x0000aaaab417f324 aio_dispatch (qemu-kvm + 0x90f324)
#16 0x0000aaaab4199898 aio_ctx_dispatch (qemu-kvm + 0x929898)
#17 0x0000ffff94d250c0 g_main_context_dispatch (libglib-2.0.so.0 + 0x550c0)
#18 0x0000aaaab419a0a0 main_loop_wait (qemu-kvm + 0x92a0a0)
#19 0x0000aaaab3c2bff4 qemu_main_loop (qemu-kvm + 0x3bbff4)
#20 0x0000aaaab40e71c4 qemu_default_main (qemu-kvm + 0x8771c4)
#21 0x0000ffff94847280 __libc_start_call_main (libc.so.6 + 0x27280)
#22 0x0000ffff94847358 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x27358)
#23 0x0000aaaab3b335b0 _start (qemu-kvm + 0x2c35b0)
See full backtrace in attachment