panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188
Starting stack trace...
panic(ffffffff830f8354) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff830a900c,ffffffff830690ad,bc,ffffffff8302b8c6) at __assert+0x29
unveil_destroy(ffff800037257660) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188
exit1(ffff80003498ecf0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233
sys_exit(ffff80003498ecf0,ffff80002a102140,ffff80002a102090) at sys_exit+0x1a
syscall(ffff80002a102140) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80002a102140) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7152652c3f10, count: 250
End of stack trace.
syncing disks...panic: kernel diagnostic assertion "rw_write_held(uobj->vmobjlock)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 610
Starting stack trace...
panic(ffffffff830f8354) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff830a900c,ffffffff82fe8085,262,ffffffff83027381) at __assert+0x29
uvn_flush(fffffd806cedcc50,0,0,31) at uvn_flush+0xdfd sys/uvm/uvm_vnode.c:753
uvm_vnp_sync(ffff800000b66000) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1541
sys_sync(ffff80003498ecf0,0,0) at sys_sync+0xd4 sys/kern/vfs_syscalls.c:536
vfs_syncwait(ffff80003498ecf0,1) at vfs_syncwait+0x44
vfs_shutdown(ffff80003498ecf0) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1793
boot(100) at boot+0x15c sys/arch/amd64/amd64/machdep.c:907
reboot(100) at reboot+0xb1
panic(ffffffff830f8354) at panic+0x1f9 sys/kern/subr_prf.c:231
__assert(ffffffff830a900c,ffffffff830690ad,bc,ffffffff8302b8c6) at __assert+0x29
unveil_destroy(ffff800037257660) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188
exit1(ffff80003498ecf0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233
sys_exit(ffff80003498ecf0,ffff80002a102140,ffff80002a102090) at sys_exit+0x1a
syscall(ffff80002a102140) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80002a102140) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7152652c3f10, count: 241
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 50375c3b-e826-8a7e-06ca-b163c863336b
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.67
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace