panic: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/uipc_mbuf.c", line 1384
Starting stack trace...
panic(ffffffff82577da7) at panic+0x16b sys/kern/subr_prf.c:233
__assert(ffffffff825ebc34,ffffffff8255f654,568,ffffffff8258dc04) at __assert+0x25 sys/kern/subr_prf.c:161
m_align(fffffd807e2a9000,ffffffce) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385
bpf_movein(ffff8000240bc058,ffff800000c6b400,ffff8000240bbdb8,ffff8000240bbcb8) at bpf_movein+0x25e sys/net/bpf.c:228
bpfwrite(61700,ffff8000240bc058,1) at bpfwrite+0x169 sys/net/bpf.c:644
spec_write(ffff8000240bbeb0) at spec_write+0xd4 sys/kern/spec_vnops.c:309
VOP_WRITE(fffffd80677b1170,ffff8000240bc058,1,fffffd807f7d8780) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
vn_write(fffffd806f1731d0,ffff8000240bc058,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414
dofilewritev(ffff8000ffff4540,3,ffff8000240bc058,0,ffff8000240bc150) at dofilewritev+0x19c sys/kern/sys_generic.c:381
sys_write(ffff8000ffff4540,ffff8000240bc0f8,ffff8000240bc150) at sys_write+0x83 sys/kern/sys_generic.c:301
syscall(ffff8000240bc1c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000240bc1c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3c14c835750, count: 245
End of stack trace.
syncing disks...20 17  done

dump to dev 4,1 not possible
rpebaonoiticn:g .k..er
nel diagnostSeaBIOS (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 10ee261f-e4fb-b939-235d-2a56a4c27911
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 0x000f2500: 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 3.53
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