witness: lock_object uninitialized: 0xffff8000001a1578

Starting stack trace...

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,98b663eca11b8391,ffff8000001a1550) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline]

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,98b663eca11b8391,ffff8000001a1550) at witness_checkorder+0x137 sys/kern/subr_witness.c:777

mtx_enter(ffff8000001a1568,ffff8000001a1568,37c4a1f5068fbb41,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,cd7a18c48278e1cb,ffffffff82bc6d10) at vio_attach+0x5b7 sys/dev/pv/if_vio.c:596

config_attach(ffff800000024c00,ffffffff82c30de8,ffff800000024c00,0,2944d8f7b3862db9,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

virtio_pci_attach(ffff80000002de00,ffff800000024c00,ffffffff8315ca10,ffff80000002de00,38b6640f9ea44bb1,ffffffff82b76d38) at virtio_pci_attach+0x24d sys/dev/pci/virtio_pci.c:611

config_attach(ffff80000002de00,ffffffff82c33078,ffffffff8315ca10,ffffffff81ba1340,2944d8f7b37bf864,ffff80000007b180) at config_attach+0x33a sys/kern/subr_autoconf.c:418

pci_probe_device(ffff80000002de00,80002000,0,0,a9ba57f16eddefa,0) at pci_probe_device+0x730 sys/dev/pci/pci.c:574

pci_enumerate_bus(ffff80000002de00,0,0,ffff80000002de00,f273936498bfbb37,ffffffff82bca810) at pci_enumerate_bus+0x260 sys/dev/pci/pci.c:863

config_attach(ffff80000002b280,ffffffff82c30f38,ffffffff8315cc60,ffffffff815d25d0,2944d8f7b39cc1b5,ffff80000002db00) at config_attach+0x33a sys/kern/subr_autoconf.c:418

acpipci_attach_bus(ffff80000002b280,ffff80000002db00,98b663eca2792c55,2,ffff80000002b280,1) at acpipci_attach_bus+0x261 sys/arch/amd64/pci/acpipci.c:226

acpipci_attach_busses(ffff80000002b280,ffff80000002b280,7e5480dbed8588de,1,ffff80000002b280,ffffffff82c367e0) at acpipci_attach_busses+0x6a sys/arch/amd64/pci/acpipci.c:234

mainbus_attach(0,ffff80000002b280,0,0,33e877e0b48e983,ffffffff82c3d8e0) at mainbus_attach+0x24e sys/arch/amd64/amd64/mainbus.c:232

config_attach(0,ffffffff82c30a68,0,0,2944d8f7b3eba028,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

cpu_configure(ea02f52b97a85058,0,ffff800000028000,ffff80000002e000,ffffffff812a443c,ffffffff8315cf00) 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: e6127c06f66dafce1e66561fe8966f3e38b4bb27d45639f85202a0da07d2bc32, active connections: 1).