panic: trap type 4, code=0, pc=ffffffff82b87304
Starting stack trace...
panic(ffffffff82fdd8a8) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a757760) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
__x86_indirect_thunk_r11() at __x86_indirect_thunk_r11+0x14
rt_clone(ffff80002a757a38,fffffd806f0ecc60,0) at rt_clone+0x98 sys/net/route.c:383
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 rt_match sys/net/route.c:360 [inline]
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 rtalloc_mpath sys/net/route.c:476 [inline]
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 sys/net/route.c:255
in_pcbselsrc(fffffd8069538af8,ffff80002a757b88,fffffd806f0ecbd0) at in_pcbselsrc+0x250
rip_output(fffffd8069538a00,ffff8000012882a8,ffff80002a757b88,167) at rip_output+0x2bf sys/netinet/raw_ip.c:310
rip_send(ffff8000012882a8,fffffd8069538a00,0,0) at rip_send+0x13d sys/netinet/raw_ip.c:628
sosend(ffff8000012882a8,0,ffff80002a757ce8,0,0,0) at sosend+0xa40
sendit(ffff80002a762ce8,4,ffff80002a757de0,0,ffff80002a757e90) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a762ce8,ffff80002a757f40,ffff80002a757e90) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564
syscall(ffff80002a757f40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a757f40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xba1c458ab20, count: 243
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 611
Starting stack trace...
panic(ffffffff830e2b0f) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8309c06f,ffffffff82fe2611,263,ffffffff8301ac49) at __assert+0x29
uvn_flush(fffffd806f0bfac0,0,0,31) at uvn_flush+0xdfd sys/uvm/uvm_vnode.c:754
uvm_vnp_sync(ffff800000b5e000) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1542
sys_sync(ffff80002a762ce8,0,0) at sys_sync+0xd4 sys/kern/vfs_syscalls.c:536
vfs_syncwait(ffff80002a762ce8,1) at vfs_syncwait+0x44
vfs_shutdown(ffff80002a762ce8) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1791
boot(100) at boot+0x15c sys/arch/amd64/amd64/machdep.c:907
reboot(100) at reboot+0xb1
panic(ffffffff82fdd8a8) at panic+0x1f9 sys/kern/subr_prf.c:231
kerntrap(ffff80002a757760) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
__x86_indirect_thunk_r11() at __x86_indirect_thunk_r11+0x14
rt_clone(ffff80002a757a38,fffffd806f0ecc60,0) at rt_clone+0x98 sys/net/route.c:383
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 rt_match sys/net/route.c:360 [inline]
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 rtalloc_mpath sys/net/route.c:476 [inline]
route_mpath(fffffd806f0ecc48,ffff80002a757b8c,0,0) at route_mpath+0x170 sys/net/route.c:255
in_pcbselsrc(fffffd8069538af8,ffff80002a757b88,fffffd806f0ecbd0) at in_pcbselsrc+0x250
rip_output(fffffd8069538a00,ffff8000012882a8,ffff80002a757b88,167) at rip_output+0x2bf sys/netinet/raw_ip.c:310
rip_send(ffff8000012882a8,fffffd8069538a00,0,0) at rip_send+0x13d sys/netinet/raw_ip.c:628
sosend(ffff8000012882a8,0,ffff80002a757ce8,0,0,0) at sosend+0xa40
sendit(ffff80002a762ce8,4,ffff80002a757de0,0,ffff80002a757e90) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a762ce8,ffff80002a757f40,ffff80002a757e90) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564
syscall(ffff80002a757f40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a757f40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xba1c458ab20, count: 234
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 2c48b237-609e-0a7d-d6ca-08d70f46a694
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 $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