panic: trap type 4, code=0, pc=ffffffff820c8e5b
Starting stack trace...
panic(ffffffff833a8c17) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c940f50) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0x0, count: 254
End of stack trace.
syncing disks...panic: kernel diagnostic assertion "(sih->sih_state & SIS_RESTART) == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_softintr.c", line 181
Starting stack trace...
panic(ffffffff8337b146) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833baccf,ffffffff83351e3c,b5,ffffffff8336fefe) at __assert+0x29 sys/kern/subr_prf.c:-1
softintr_schedule(ffff80000002a040) at softintr_schedule+0x1d1
timeout_hardclock_update() at timeout_hardclock_update+0x6f5 sys/kern/kern_timeout.c:669
clockintr_hardclock(ffffffff837cfc20,ffff80003c940890,0) at clockintr_hardclock+0x148 sys/kern/kern_clockintr.c:-1
clockintr_dispatch(ffff80003c940890) at clockintr_dispatch+0x396 sys/kern/kern_clockintr.c:-1
lapic_clockintr(0,0) at lapic_clockintr+0x43 sys/arch/amd64/amd64/lapic.c:482
Xresume_lapic_ltimer() at Xresume_lapic_ltimer+0x2a
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153
uvn_io(fffffd806eec4198,ffff80003c940ba0,1,31,1) at uvn_io+0x765 sys/uvm/uvm_vnode.c:1281
uvn_put(fffffd806eec4198,ffff80003c940ba0,1,31) at uvn_put+0x125 sys/uvm/uvm_vnode.c:891
uvm_pager_put(fffffd806eec4198,fffffd80041f3480,ffff80003c940c40,ffff80003c940c64,31,0,fea9ad6c6762815f) at uvm_pager_put+0x10a sys/uvm/uvm_pager.c:505
uvn_flush(fffffd806eec4198,0,0,31) at uvn_flush+0x68d sys/uvm/uvm_vnode.c:705
uvm_vnp_sync(ffff800000c68400) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1501
sys_sync(ffff80003c93afb0,0,0) at sys_sync+0xd4 sys/kern/vfs_syscalls.c:534
vfs_syncwait(ffff80003c93afb0,1) at vfs_syncwait+0x44 sys/kern/vfs_subr.c:-1
vfs_shutdown(ffff80003c93afb0) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1803
boot(100) at boot+0x166 sys/arch/amd64/amd64/machdep.c:927
reboot(100) at reboot+0xa8
panic(ffffffff833a8c17) at panic+0x1e3
kerntrap(ffff80003c940f50) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0x0, count: 235
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 9c8ab089-5fb3-144b-a4ba-2e178800b25c
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 0x000f26e0: 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> trace
|/-\|/-\|/booting hd0a:trace: -\|/open hd0a:trace: No such file or directory
 failed(2). will try /bsd
boot> machine ddbcpu 1
machine: syntax error
boot> trace