witness: lock_object uninitialized: 0xffff8000001a1578

Starting stack trace...

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,e70cee398943a08d,ffff8000001a1550) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline]

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,e70cee398943a08d,ffff8000001a1550) at witness_checkorder+0x137 sys/kern/subr_witness.c:777

mtx_enter(ffff8000001a1568,ffff8000001a1568,b044d15d070cae60,ffff8000001a1550,fff,ffff8000001a1568) at mtx_enter+0x3e sys/kern/kern_lock.c:265

ifq_set_maxlen(ffff8000001a1550,fff,ffff8000001a1050,ffff800000024c00,ffff8000001a12a8,ffff8000001a1050) at ifq_set_maxlen+0x28 sys/net/ifq.c:536

vio_attach(ffff800000024c00,ffff8000001a1000,ffff800000024c00,ffff800000024c00,cd90504ad0123f5a,ffffffff82c147b0) at vio_attach+0x5b7 sys/dev/pv/if_vio.c:596

config_attach(ffff800000024c00,ffffffff82bdfd58,ffff800000024c00,0,f054059ec350e0e0,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

virtio_pci_attach(ffff80000002de00,ffff800000024c00,ffffffff8315fa10,ffff80000002de00,828c4d8230dfb835,ffffffff82be9d18) at virtio_pci_attach+0x24d sys/dev/pci/virtio_pci.c:611

config_attach(ffff80000002de00,ffffffff82be1fe8,ffffffff8315fa10,ffffffff81972f80,f054059ec345a7ad,ffff80000007b180) at config_attach+0x33a sys/kern/subr_autoconf.c:418

pci_probe_device(ffff80000002de00,80002000,0,0,64b830119f47b0fa,0) at pci_probe_device+0x730 sys/dev/pci/pci.c:574

pci_enumerate_bus(ffff80000002de00,0,0,ffff80000002de00,66113a97cefcad48,ffffffff82bc8bd0) at pci_enumerate_bus+0x260 sys/dev/pci/pci.c:863

config_attach(ffff80000002b280,ffffffff82bdfea8,ffffffff8315fc60,ffffffff81c5d060,f054059ec3174f2c,ffff80000002db00) at config_attach+0x33a sys/kern/subr_autoconf.c:418

acpipci_attach_bus(ffff80000002b280,ffff80000002db00,e70cee39899790a9,2,ffff80000002b280,1) at acpipci_attach_bus+0x261 sys/arch/amd64/pci/acpipci.c:226

acpipci_attach_busses(ffff80000002b280,ffff80000002b280,21d43ed08ba17604,1,ffff80000002b280,ffffffff82be5750) at acpipci_attach_busses+0x6a sys/arch/amd64/pci/acpipci.c:234

mainbus_attach(0,ffff80000002b280,0,0,24dcefb06ea194fc,ffffffff82c3b290) at mainbus_attach+0x24e sys/arch/amd64/amd64/mainbus.c:232

config_attach(0,ffffffff82bdf9d8,0,0,f054059ec3e056e1,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

cpu_configure(8154d70a5f8853a7,0,ffff800000028000,ffff80000002e000,ffffffff8132c9fc,ffffffff8315ff00) at cpu_configure+0x3c sys/arch/amd64/amd64/autoconf.c:124

main(0,0,0,0,0,1) at main+0x401 sys/kern/init_main.c:342

end trace frame: 0x0, count: 241

End of stack trace.

Stopped at      db_enter+0x1c:  addq    $0x8,%rsp

ddb{0}> serialport: Connected to syzkaller.us-central1-b.ci-openbsd-setuid-test-0 port 1 (session ID: db8812e76ebc9d631a9c4fafaa83f818c7dc77c31534949323673106f67b5a37, active connections: 1).