witness: lock_object uninitialized: 0xffff8000001a1578

Starting stack trace...

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,ce98fccd41a8eae7,ffff8000001a1550) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline]

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,ce98fccd41a8eae7,ffff8000001a1550) at witness_checkorder+0x137 sys/kern/subr_witness.c:777

mtx_enter(ffff8000001a1568,ffff8000001a1568,b1830df4c9c40804,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,bddad4a73f4d795c,ffffffff82bad140) at vio_attach+0x5b7 sys/dev/pv/if_vio.c:596

config_attach(ffff800000024c00,ffffffff82c0f858,ffff800000024c00,0,5d0fff4128a5b6e,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

virtio_pci_attach(ffff80000002de00,ffff800000024c00,ffffffff83163a10,ffff80000002de00,4e7266fc60a7eead,ffffffff82c09310) at virtio_pci_attach+0x24d sys/dev/pci/virtio_pci.c:611

config_attach(ffff80000002de00,ffffffff82c11ae8,ffffffff83163a10,ffffffff8259fa50,5d0fff41157f3a3,ffff80000007b180) at config_attach+0x33a sys/kern/subr_autoconf.c:418

pci_probe_device(ffff80000002de00,80002000,0,0,cf78ac3dda40df06,0) at pci_probe_device+0x730 sys/dev/pci/pci.c:574

pci_enumerate_bus(ffff80000002de00,0,0,ffff80000002de00,3cd647b689ba7170,ffffffff82c46280) at pci_enumerate_bus+0x260 sys/dev/pci/pci.c:863

config_attach(ffff80000002b280,ffffffff82c0f9a8,ffffffff83163c60,ffffffff81dd60a0,5d0fff412d09052,ffff80000002db00) at config_attach+0x33a sys/kern/subr_autoconf.c:418

acpipci_attach_bus(ffff80000002b280,ffff80000002db00,beba6defd3d5b640,2,ffff80000002b280,1) at acpipci_attach_bus+0x261 sys/arch/amd64/pci/acpipci.c:226

acpipci_attach_busses(ffff80000002b280,ffff80000002b280,cad736a71370ae3a,1,ffff80000002b280,ffffffff82c15250) at acpipci_attach_busses+0x6a sys/arch/amd64/pci/acpipci.c:234

mainbus_attach(0,ffff80000002b280,0,0,3e55598502539321,ffffffff82bf0b88) at mainbus_attach+0x24e sys/arch/amd64/amd64/mainbus.c:232

config_attach(0,ffffffff82c0f4d8,0,0,5d0fff4110ed8ff,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

cpu_configure(2bac71dc6f739924,0,ffff800000028000,ffff80000002e000,ffffffff820328dc,ffffffff83163f00) 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-multicore-test-2 port 1 (session ID: 91b22eefe6d25f90400f285342a1b60c29f8be929b08587589e07f3aeabacfcb, active connections: 1).