witness: lock_object uninitialized: 0xffff8000001a1578

Starting stack trace...

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,c3d3185ad4cf0dc1,ffff8000001a1550) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline]

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,c3d3185ad4cf0dc1,ffff8000001a1550) at witness_checkorder+0x137 sys/kern/subr_witness.c:777

mtx_enter(ffff8000001a1568,ffff8000001a1568,ff0fa72d7cff8f7c,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,dea8ee523fea82ae,ffffffff82bbad00) at vio_attach+0x5b7 sys/dev/pv/if_vio.c:596

config_attach(ffff800000024c00,ffffffff82bc7418,ffff800000024c00,0,88a383236e79ff34,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

virtio_pci_attach(ffff80000002de00,ffff800000024c00,ffffffff83160a10,ffff80000002de00,8fdf3608c890b06d,ffffffff82c28040) at virtio_pci_attach+0x24d sys/dev/pci/virtio_pci.c:611

config_attach(ffff80000002de00,ffffffff82bc96a8,ffffffff83160a10,ffffffff81d6e2b0,88a383236efd1929,ffff80000007b180) at config_attach+0x33a sys/kern/subr_autoconf.c:418

pci_probe_device(ffff80000002de00,80002000,0,0,a56f5610549e949e,0) at pci_probe_device+0x730 sys/dev/pci/pci.c:574

pci_enumerate_bus(ffff80000002de00,0,0,ffff80000002de00,6ddb4086ed07ba69,ffffffff82bddda0) at pci_enumerate_bus+0x260 sys/dev/pci/pci.c:863

config_attach(ffff80000002b280,ffffffff82bc7568,ffffffff83160c60,ffffffff825df9f0,88a383236d760b08,ffff80000002db00) at config_attach+0x33a sys/kern/subr_autoconf.c:418

acpipci_attach_bus(ffff80000002b280,ffff80000002db00,3096acadbf8e1f94,2,ffff80000002b280,1) at acpipci_attach_bus+0x261 sys/arch/amd64/pci/acpipci.c:226

acpipci_attach_busses(ffff80000002b280,ffff80000002b280,849cb6c857b51549,1,ffff80000002b280,ffffffff82bcce10) at acpipci_attach_busses+0x6a sys/arch/amd64/pci/acpipci.c:234

mainbus_attach(0,ffff80000002b280,0,0,9e5573e1cd36beb,ffffffff82c0fac0) at mainbus_attach+0x24e sys/arch/amd64/amd64/mainbus.c:232

config_attach(0,ffffffff82bc7098,0,0,88a383236d4debe5,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

cpu_configure(86352eef07fedf43,0,ffff800000028000,ffff80000002e000,ffffffff8266192c,ffffffff83160f00) 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: c1eefb889fd5f4079821f8399acadb0ef32c2203aaf6cced84781fa927ba453c, active connections: 1).