witness: lock order reversal:
1st 0xffffffff839aa6c8 pf_lock (pf_lock)
2nd 0xffffffff83976af0 netlock (netlock)
lock order [1] pf_lock (pf_lock) -> [2] netlock (netlock)
#0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
#1 uvn_io+0x54c sys/uvm/uvm_vnode.c:1244
#2 uvn_get+0x31d sys/uvm/uvm_vnode.c:1076
#3 uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612
#4 uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381
#5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#6 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:285
#7 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:532
#8 alltraps_kern_meltdown+0x7b
#9 _copyin+0x5b
#10 pfioctl+0x1377 sys/net/pf_ioctl.c:3284
#11 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#12 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
#13 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#14 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#14 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#15 Xsyscall+0x128
lock order [2] netlock (netlock) -> [1] pf_lock (pf_lock)
#0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
#1 pfi_attach_ifgroup+0x2a sys/net/pf_if.c:357
#2 if_addgroup+0x2f8 if_creategroup sys/net/if.c:3059 [inline]
#2 if_addgroup+0x2f8 sys/net/if.c:3097
#3 if_attachsetup+0xcf sys/net/if.c:512
#4 if_attach+0x6d sys/net/if.c:604
#5 vio_attach+0x1853 sys/dev/pv/if_vio.c:935
#6 config_attach+0x449 sys/kern/subr_autoconf.c:421
#7 virtio_pci_attach+0x4e6 sys/dev/pci/virtio_pci.c:673
#8 config_attach+0x449 sys/kern/subr_autoconf.c:421
#9 pci_probe_device+0x8e5 sys/dev/pci/pci.c:574
#10 pci_enumerate_bus+0x368 sys/dev/pci/pci.c:877
#11 config_attach+0x449 sys/kern/subr_autoconf.c:421
#12 acpipci_attach_bus+0x381 sys/arch/amd64/pci/acpipci.c:257
#13 acpipci_attach_busses+0x93 sys/arch/amd64/pci/acpipci.c:265
#14 mainbus_attach+0x304 sys/arch/amd64/amd64/mainbus.c:222
#15 config_attach+0x449 sys/kern/subr_autoconf.c:421
#16 cpu_configure+0x47 sys/arch/amd64/amd64/autoconf.c:124
#17 main+0x4c7 sys/kern/init_main.c:345
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> show kasan
No such command
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff83976af0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(ffffffff83976ad8,0) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
uvn_io(fffff4006cd40dd0,ffff80003839d7b8,1,202,0) at uvn_io+0x54c sys/uvm/uvm_vnode.c:1244
uvn_get(fffff4006cd40dd0,0,ffff80003839d888,ffff80003839d86c,0,1,3e6e06bd75e2dabe,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1076
uvm_fault_lower_io(ffff80003839daa0,ffff80003839dad8,ffff80003839d920,ffff80003839d908) at uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612
uvm_fault_lower(ffff80003839daa0,ffff80003839dad8,ffff80003839da20) at uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381
uvm_fault(fffff4006cefe3e8,200000001000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003839dc50,200000001200) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:285
kerntrap(ffff80003839dc50) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:532
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
pfioctl(24900,c4504441,ffff800001575000,1,ffff80002a21c010) at pfioctl+0x1377 sys/net/pf_ioctl.c:3284
VOP_IOCTL(fffff4007af467b8,c4504441,ffff800001575000,1,fffff400097fd618,ffff80002a21c010) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffff4006cf0b710,c4504441,ffff800001575000,ffff80002a21c010) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80002a21c010,ffff80003839e800,ffff80003839e750) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003839e800) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003839e800) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc8ba5158d80, count: -18
ddb{1}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80003839d570
rbx 0
rdx 0xffff8000015fb780
rcx 0xffff80002a21c010
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80003839d450
r9 0x8080808080808080
r10 0x286a96440fe5da97
r11 0xc31fcdb152e3edae
r12 0xfffff400041072c0
r13 0xfffff400048f6d68
r14 0x3
r15 0xffffffff8355ee31 substchar+0x500b
rip 0xffffffff81991da5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003839d560
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=130573 pid=53864 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800045fe9778,0xffff80002a21d248
process=0xffff800045fe49d0 user=0xffff800038399000, vmspace=0xfffff4006cefe3e8
estcpu=18, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
69806 247034 77039 0 7 0 0 syz-executor
69806 365986 77039 0 3 0 0x4000080 fsleep syz-executor
69806 475067 77039 0 3 0 0x4000080 ttyin syz-executor
69806 8036 77039 0 3 0 0x4000080 ttyin syz-executor
50037 474535 71933 0 2 0 0 syz-executor
52914 216642 27511 0 2 0 0 syz-executor
52914 126800 27511 0 2 0 0x4000000 syz-executor
53864 454666 62414 0 2 0 0 syz-executor
*53864 130573 62414 0 7 0 0x4000000 syz-executor
52480 498845 24662 0 2 0x2 0 syz-executor
96354 46328 74987 0 3 0x2 0 clonelk ifconfig
74987 252280 92902 0 3 0x100002 0x88 sigsusp sh
92902 205361 24662 0 3 0x2 0x80 wait syz-executor
64398 218137 5255 0 3 0 0x80 nanoslp syz-executor
64398 383491 5255 0 3 0 0x4000080 fsleep syz-executor
64398 434449 5255 0 3 0 0x4000080 kqpoll syz-executor
64398 375259 5255 0 3 0 0x4000080 fsleep syz-executor
71933 189580 24662 0 2 0x2 0 syz-executor
8970 63196 24662 0 3 0x2 0x80 nanoslp syz-executor
27511 164119 24662 0 3 0x2 0x80 nanoslp syz-executor
62414 308704 24662 0 3 0x2 0x80 nanoslp syz-executor
5255 338230 24662 0 3 0x2 0x80 nanoslp syz-executor
77039 2180 24662 0 3 0x2 0x80 nanoslp syz-executor
24662 318503 5788 0 3 0x2 0x80 kqread syz-executor
5788 118605 50231 0 3 0x100002 0x88 sigsusp ksh
50231 107766 45306 0 3 0x10 0x88 kqread sshd-session
45306 203309 25207 0 3 0x12 0x80 kqread sshd-session
76641 497890 1 0 3 0x100003 0x80 ttyin getty
25207 387845 1 0 3 0 0x88 kqread sshd
74899 154153 19339 74 3 0x1100012 0x80 bpf pflogd
19339 80306 1 0 3 0 0x80 sbwait pflogd
78325 93232 22605 73 3 0x1100010 0x80 kqread syslogd
22605 115702 1 0 3 0x100002 0x80 sbwait syslogd
62477 465735 1 0 3 0x100000 0x80 kqread resolvd
81054 50889 71137 77 3 0x100012 0x80 kqread dhcpleased
14642 117484 71137 77 3 0x100012 0x80 kqread dhcpleased
71137 51845 1 0 3 0 0x80 kqread dhcpleased
68136 221863 0 0 3 0x14000 0x200 bored smr
1339 227530 0 0 2 0x14000 0x200 zerothread
95118 368465 0 0 3 0x14000 0x200 aiodoned aiodoned
86497 206638 0 0 3 0x14000 0x200 syncer update
92127 188551 0 0 3 0x14000 0x200 cleaner cleaner
49443 178031 0 0 3 0x14000 0x200 reaper reaper
15158 66930 0 0 3 0x14000 0x200 pgdaemon pagedaemon
39463 513969 0 0 3 0x14000 0x200 bored viomb
78314 408080 0 0 3 0x14000 0x40000200 acpi0 acpi0
39897 381822 0 0 3 0x14000 0x40000200 idle1
90394 249762 0 0 3 0x14000 0x200 bored softnet1
1835 408452 0 0 2 0x14000 0x200 softnet0
20226 204998 0 0 3 0x14000 0x200 smrbar systqmp
75602 138358 0 0 3 0x14000 0x200 bored systq
55317 423944 0 0 3 0x14000 0x200 tmoslp softclockmp
95496 252427 0 0 3 0x14000 0x40000200 tmoslp softclock
23728 93512 0 0 3 0x14000 0x40000200 idle0
1 193710 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
Process 53864 (syz-executor) thread 0xffff80002a21c010 (130573)
exclusive rwlock pf_lock r = 0 (0xffffffff839aa6c8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 pfioctl+0x1342 sys/net/pf_ioctl.c:3284
#3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#4 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
#5 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#7 Xsyscall+0x128
exclusive rwlock pfioctl_rw r = 0 (0xffffffff839aa758)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 pfioctl+0x1d4 sys/net/pf_ioctl.c:2064
#3 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#4 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
#5 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#7 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83ac6c80)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:520
#2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#4 Xsyscall+0x128
Process 20226 (systqmp) thread 0xffff800045ffe530 (204998)
shared rwlock systqmp r = 0 (0xffffffff83979b58)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11050 12082K 12214K 166960K 12161 0
pcb 17 12K 12K 166960K 28 0
rtable 195 5K 7K 166960K 359 0
pf 33 17K 24K 166960K 61 0
ifaddr 36 6K 7K 166960K 46 0
ifgroup 52 2K 2K 166960K 60 0
sysctl 1 1K 9K 166960K 5 0
counters 68 36K 37K 166960K 72 0
ioctlops 1 2K 4K 166960K 1490 0
iov 0 0K 1K 166960K 2 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1296 82K 82K 166960K 1395 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 1K 166960K 2 0
VM map 2 1K 1K 166960K 2 0
sem 4 0K 0K 166960K 4 0
dirhash 15 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 89K 166960K 164 0
proc 79 131K 164K 166960K 564 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 9 0
in_multi 77 5K 6K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 2 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 43 201K 201K 166960K 43 0
exec 0 0K 1K 166960K 396 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 231 176K 184K 166960K 3284 0
UVM aobj 3 2K 4K 166960K 4 0
pinsyscall 43 86K 102K 166960K 1354 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 1 0K 0K 166960K 2 0
NDP 23 1K 2K 166960K 29 0
temp 34 9122K 9128K 166960K 3736 0
kqueue 14 22K 22K 166960K 28 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 28 0 0 1 0 1 1 0 8 0
rtpcb 120 36 0 33 1 0 1 1 0 8 0
rtentry 176 112 0 23 6 0 6 6 0 8 0
unpcb 144 54 0 36 1 0 1 1 0 8 0
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpcb 736 13 0 9 1 0 1 1 0 8 0
arp 136 18 0 4 1 0 1 1 0 8 0
inpcb 328 92 0 80 2 0 2 2 0 8 1
nd6 152 25 0 6 1 0 1 1 0 8 0
kcovpl 48 9 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfanchor 1288 4 0 0 1 0 1 1 0 8 0
pfstitem 24 28 0 0 1 0 1 1 0 8 0
pfstkey 128 28 0 0 1 0 1 1 0 8 0
pfstate 448 28 0 0 4 0 4 4 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 461 0 0 29 0 29 29 0 8 0
art_table 40 462 0 0 5 0 5 5 0 8 0
art_node 32 112 0 21 1 0 1 1 0 8 0
semapl 72 2 0 0 1 0 1 1 0 8 0
shmpl 120 1 0 1 1 0 1 1 0 8 1
dirhash 1024 19 0 0 3 0 3 3 0 8 0
dino2pl 256 1599 0 124 93 0 93 93 0 8 0
ffsino 296 1599 0 124 114 0 114 114 0 8 0
nchpl 144 1819 0 111 64 0 64 64 0 8 0
vnodes 216 1716 0 0 96 0 96 96 0 8 0
namei 1024 6443 0 6443 3 1 2 2 0 8 2
percpumem 16 52 0 2 1 0 1 1 0 8 0
kstatmem 264 29 0 4 2 0 2 2 0 8 0
scxspl 216 6340 0 6340 4 2 2 3 1 8 2
plimitpl 152 34 0 16 1 0 1 1 0 8 0
sigapl 424 486 0 438 7 0 7 7 0 8 0
knotepl 120 55 0 0 2 0 2 2 0 8 0
kqueuepl 224 26 0 16 1 0 1 1 0 8 0
pipepl 344 136 0 109 3 0 3 3 0 8 0
fdescpl 528 470 0 438 3 0 3 3 0 8 0
filepl 160 1717 0 1494 10 0 10 10 0 8 0
lockfpl 104 12 0 8 1 0 1 1 0 8 0
lockfspl 48 8 0 4 1 0 1 1 0 8 0
sessionpl 144 27 0 18 1 0 1 1 0 8 0
pgrppl 48 37 0 20 1 0 1 1 0 8 0
ucredpl 104 106 0 93 1 0 1 1 0 8 0
zombiepl 144 439 0 438 1 0 1 1 0 8 0
processpl 1240 486 0 438 5 0 5 5 0 8 0
procpl 664 527 0 471 6 0 6 6 0 8 1
sockpl 752 182 0 149 4 0 4 4 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 135 0 0 17 0 17 17 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mextrefs 64 20 0 0 1 0 1 1 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 182 0 0 12 0 12 12 0 8 0
bufpl 272 2310 0 105 147 0 147 147 0 8 0
anonpl 32 3529 0 0 29 0 29 29 0 247 0
amapchunkpl 152 8700 0 8235 18 0 18 18 0 158 0
amappl16 200 1115 0 1100 4 0 4 4 0 8 3
amappl15 192 5 0 5 1 0 1 1 0 8 1
amappl14 184 453 0 450 1 0 1 1 0 8 0
amappl13 176 126 0 114 1 0 1 1 0 8 0
amappl12 168 740 0 711 2 0 2 2 0 8 0
amappl11 160 5 0 4 1 0 1 1 0 8 0
amappl10 152 67 0 53 1 0 1 1 0 8 0
amappl9 144 273 0 273 1 0 1 1 0 8 1
amappl8 136 115 0 113 1 0 1 1 0 8 0
amappl7 128 170 0 156 1 0 1 1 0 8 0
amappl6 120 154 0 151 1 0 1 1 0 8 0
amappl5 112 110 0 100 1 0 1 1 0 8 0
amappl4 104 311 0 290 1 0 1 1 0 8 0
amappl3 96 1562 0 1472 3 0 3 3 0 8 0
amappl2 88 595 0 520 2 0 2 2 0 8 0
amappl1 80 10693 0 10084 15 0 15 15 0 8 0
amappl 88 2524 0 2367 4 0 4 4 0 92 0
uvmvnodes 80 102 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 3 0 1 1 0 1 1 0 8 0
uaddrrnd 24 470 0 438 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 470 0 438 1 0 1 1 0 8 0
vmmpekpl 168 5969 0 5933 3 0 3 3 0 8 0
vmmpepl 168 39375 0 37492 86 0 86 86 0 357 3
vmsppl 488 469 0 438 5 0 5 5 0 8 0
rwobjpl 80 14266 0 13241 23 0 23 23 0 8 0
pdppl 4096 948 0 876 96 12 84 84 0 8 12
pvpl 32 9114 0 0 75 1 74 74 0 265 0
pmappl 256 469 0 438 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 419 0 16 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83934ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83ac6480) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83ac6480) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80002a2a8a00,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x76ec1207b8e0, count: -10
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffffffff83976af0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(ffffffff83976ad8,0) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
uvn_io(fffff4006cd40dd0,ffff80003839d7b8,1,202,0) at uvn_io+0x54c sys/uvm/uvm_vnode.c:1244
uvn_get(fffff4006cd40dd0,0,ffff80003839d888,ffff80003839d86c,0,1,3e6e06bd75e2dabe,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1076
uvm_fault_lower_io(ffff80003839daa0,ffff80003839dad8,ffff80003839d920,ffff80003839d908) at uvm_fault_lower_io+0x2ce sys/uvm/uvm_fault.c:1612
uvm_fault_lower(ffff80003839daa0,ffff80003839dad8,ffff80003839da20) at uvm_fault_lower+0x28d sys/uvm/uvm_fault.c:1381
uvm_fault(fffff4006cefe3e8,200000001000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003839dc50,200000001200) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:285
kerntrap(ffff80003839dc50) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:532
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
pfioctl(24900,c4504441,ffff800001575000,1,ffff80002a21c010) at pfioctl+0x1377 sys/net/pf_ioctl.c:3284
VOP_IOCTL(fffff4007af467b8,c4504441,ffff800001575000,1,fffff400097fd618,ffff80002a21c010) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffff4006cf0b710,c4504441,ffff800001575000,ffff80002a21c010) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff80002a21c010,ffff80003839e800,ffff80003839e750) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003839e800) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003839e800) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc8ba5158d80, count: -18