witness: lock_object uninitialized: 0xffff8000001a1578

Starting stack trace...

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,909401fd3091fb3b,ffff8000001a1550) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline]

witness_checkorder(ffff8000001a1578,9,0,ffff8000001a1578,909401fd3091fb3b,ffff8000001a1550) at witness_checkorder+0x137 sys/kern/subr_witness.c:777

mtx_enter(ffff8000001a1568,ffff8000001a1568,ec7d1654bace6bfe,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,ffff800000024c00,9813e58ba42ce085,ffffffff82ba4260) at vio_attach+0x5b7 sys/dev/pv/if_vio.c:596

config_attach(ffff800000024c00,ffffffff82bd1dc8,ffff800000024c00,0,2e9c99e1a5e77ba8,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

virtio_pci_attach(ffff80000002de00,ffff800000024c00,ffffffff83161a10,ffff80000002de00,4efba8581419f049,ffffffff82bb4930) at virtio_pci_attach+0x24d sys/dev/pci/virtio_pci.c:611

config_attach(ffff80000002de00,ffffffff82bd4058,ffffffff83161a10,ffffffff815789f0,2e9c99e1a6ba2c15,ffff80000007b180) at config_attach+0x33a sys/kern/subr_autoconf.c:418

pci_probe_device(ffff80000002de00,80002000,0,0,9fb704429faf778,0) at pci_probe_device+0x730 sys/dev/pci/pci.c:574

pci_enumerate_bus(ffff80000002de00,0,0,ffff80000002de00,139cc44e6f35b30b,ffffffff82ba4470) at pci_enumerate_bus+0x260 sys/dev/pci/pci.c:863

config_attach(ffff80000002b280,ffffffff82bd1f18,ffffffff83161c60,ffffffff8257dcf0,2e9c99e1a5ba63f4,ffff80000002db00) at config_attach+0x33a sys/kern/subr_autoconf.c:418

acpipci_attach_bus(ffff80000002b280,ffff80000002db00,909401fd33cf098f,2,ffff80000002b280,1) at acpipci_attach_bus+0x261 sys/arch/amd64/pci/acpipci.c:226

acpipci_attach_busses(ffff80000002b280,ffff80000002b280,2d233c199f2ccc9b,1,ffff80000002b280,ffffffff82bd77c0) at acpipci_attach_busses+0x6a sys/arch/amd64/pci/acpipci.c:234

mainbus_attach(0,ffff80000002b280,0,0,53dee8ffbcce34ff,ffffffff82c50a50) at mainbus_attach+0x24e sys/arch/amd64/amd64/mainbus.c:232

config_attach(0,ffffffff82bd1a48,0,0,2e9c99e1a6fa29a9,0) at config_attach+0x33a sys/kern/subr_autoconf.c:418

cpu_configure(f29ebaa95fca532c,0,ffff800000028000,ffff80000002e000,ffffffff8117969c,ffffffff83161f00) 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-2 port 1 (session ID: f57ce775d9749f3b7b9faeba2ecc68ebe4b4b7bf40653537cda1a1c391dc2c48, active connections: 1).