uvm_fault(fffffd8063956198,20d45000,0,1) at uvm_fault+0x238
kpageflttrap(ffff80002ca62bc0,20d45000) at kpageflttrap+0x209
kerntrap(ffff80002ca62bc0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x53
pipe_write(fffffd806cd457d0,ffff80002ca62e38,0) at pipe_write+0x373 sys/kern/sys_pipe.c:561
dofilewritev(ffff80002127f508,6,ffff80002ca62e38,0,ffff80002ca62f20) at dofilewritev+0x19c sys/kern/sys_generic.c:375
sys_write(ffff80002127f508,ffff80002ca62ed8,ffff80002ca62f20) at sys_write+0x83 sys/kern/sys_generic.c:295
syscall(ffff80002ca62fa0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002ca62fa0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x547f9fbaca0, count: -19
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd8066c8a0a0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd8066c8a0a0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd8066c8a090,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd8066c8a090,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd807a5b9ca8,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd807a5b9ca8,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
uvn_io(fffffd806915d8d0,ffff80002ca6f9b0,2,2b,1) at uvn_io+0x338 sys/uvm/uvm_vnode.c:1234
uvm_pager_put(fffffd806915d8d0,fffffd800794f580,ffff80002ca6fa48,ffff80002ca6fa88,2b,0,d495c57d56b17a44) at uvm_pager_put+0x137 sys/uvm/uvm_pager.c:545
uvn_flush(fffffd806915d8d0,0,2000,b) at uvn_flush+0x532 sys/uvm/uvm_vnode.c:722
uvm_map_clean(fffffd80639565e8,20000000,20002000,b) at uvm_map_clean+0x72b sys/uvm/uvm_map.c:4540
syscall(ffff80002ca6fc80) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002ca6fc80) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdcd48cb2aa0, count: -12