kernel: protection fault trap, code=0
Stopped at pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
pf_anchor_global_RB_REMOVE(ffffffff82a09208,ffff800000cd5800) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84
pf_remove_if_empty_ruleset(ffff800000cd5c90) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300
pfi_dynaddr_setup(ffff800000ba1778,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485
pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 pf_addr_setup sys/net/pf_ioctl.c:894 [inline]
pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 sys/net/pf_ioctl.c:1656
VOP_IOCTL(fffffd806f6768e8,cd60441a,ffff800000c15000,3,fffffd807f7d7060,ffff80002e3b17b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8067091130,cd60441a,ffff800000c15000,ffff80002e3b17b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80002e3b17b0,ffff80002c934a18,ffff80002c934a70) at sys_ioctl+0x4a2
syscall(ffff80002c934ae0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002c934ae0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd93f2596980, count: -9
ddb{0}> show registers
rdi 0xffff800028719000
rsi 0x140d __ALIGN_SIZE+0x40d
rbp 0xffff80002c9344f0
rbx 0xffffffff82a09208 pf_anchors
rdx 0xffff800028719000
rcx 0x140c __ALIGN_SIZE+0x40c
rax 0xffffffff8113719b pf_anchor_global_RB_REMOVE+0x2b
r8 0x400
r9 0x8080808080808080
r10 0x68eec129e3210284
r11 0x22584b5ebf7bc9a1
r12 0x34bf12f411b17669
r13 0xffffffff82a09210 pf_main_anchor
r14 0xffff800000cd5800
r15 0xdeaf007fdeafbead
rip 0xffffffff811371c8 pf_anchor_global_RB_REMOVE+0x58
cs 0x8
rflags 0x10206 __ALIGN_SIZE+0xf206
rsp 0xffff80002c9344a0
ss 0x10
pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx
ddb{0}> show proc
PROC (syz-executor.6) pid=49221 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=83, nice=20
forw=0xffffffffffffffff, list=0xffff80002e3b0d30,0xffff80002e3b1520
process=0xffff8000fffeba48 user=0xffff80002c92f000, vmspace=0xfffffd807c5565d8
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
56689 206901 73312 0 2 0 syz-executor.0
10471 115735 21229 0 2 0 syz-executor.7
10853 235167 25187 0 2 0 syz-executor.6
*10853 49221 25187 0 7 0x4000000 syz-executor.6
9146 376813 2202 0 2 0 syz-executor.1
85869 88549 82976 0 2 0 syz-executor.2
85869 190304 82976 0 3 0x4000080 fsleep syz-executor.2
58147 130176 30261 0 2 0 syz-executor.4
60885 252148 79873 0 3 0x80 nanoslp syz-executor.3
60885 303384 79873 0 2 0x4000000 syz-executor.3
60885 152319 79873 0 3 0x4000080 fsleep syz-executor.3
60885 371972 79873 0 3 0x4000080 fsleep syz-executor.3
60885 398108 79873 0 3 0x4000080 fsleep syz-executor.3
21229 497290 63300 0 3 0x82 nanoslp syz-executor.7
82247 225368 63300 0 3 0x82 piperd syz-executor.5
86690 299351 0 0 3 0x14280 nfsidl nfsio
50054 52483 0 0 3 0x14280 nfsidl nfsio
38522 478517 0 0 3 0x14280 nfsidl nfsio
11124 424204 0 0 3 0x14280 nfsidl nfsio
75042 74625 0 0 3 0x14280 nfsidl nfsio
76965 92706 0 0 3 0x14280 nfsidl nfsio
3335 462736 0 0 3 0x14280 nfsidl nfsio
75569 457604 0 0 3 0x14280 nfsidl nfsio
31162 342114 0 0 3 0x14280 nfsidl nfsio
35241 67888 0 0 3 0x14280 nfsidl nfsio
4817 219531 0 0 3 0x14280 nfsidl nfsio
67504 324795 0 0 3 0x14280 nfsidl nfsio
77706 323448 0 0 3 0x14280 nfsidl nfsio
47653 164533 0 0 3 0x14280 nfsidl nfsio
80004 136255 0 0 3 0x14280 nfsidl nfsio
13806 52313 0 0 3 0x14280 nfsidl nfsio
81901 516438 0 0 3 0x14280 nfsidl nfsio
24396 439225 0 0 3 0x14280 nfsidl nfsio
56421 376605 0 0 3 0x14280 nfsidl nfsio
91603 206840 0 0 3 0x14280 nfsidl nfsio
73312 204731 63300 0 3 0x82 nanoslp syz-executor.0
79873 327274 63300 0 3 0x82 nanoslp syz-executor.3
30261 338947 63300 0 3 0x82 nanoslp syz-executor.4
76550 42651 0 0 3 0x14200 bored sosplice
25187 168077 63300 0 2 0x2 syz-executor.6
82976 19062 63300 0 3 0x82 nanoslp syz-executor.2
2202 224295 63300 0 3 0x82 nanoslp syz-executor.1
63300 512524 91199 0 3 0x82 thrsleep syz-fuzzer
63300 161911 91199 0 3 0x4000082 nanoslp syz-fuzzer
63300 244887 91199 0 3 0x4000082 thrsleep syz-fuzzer
63300 286875 91199 0 3 0x4000082 thrsleep syz-fuzzer
63300 388281 91199 0 3 0x4000082 thrsleep syz-fuzzer
63300 363836 91199 0 3 0x4000082 kqread syz-fuzzer
63300 298915 91199 0 3 0x4000082 thrsleep syz-fuzzer
63300 36413 91199 0 3 0x4000082 thrsleep syz-fuzzer
63300 437824 91199 0 7 0x4000002 syz-fuzzer
91199 16305 85495 0 3 0x10008a sigsusp ksh
85495 502403 39452 0 3 0x9a kqread sshd
62789 46782 1 0 3 0x100083 ttyin getty
39452 436625 1 0 3 0x88 kqread sshd
77538 261210 23621 74 3 0x1100092 bpf pflogd
23621 37443 1 0 3 0x80 netio pflogd
69811 442575 37101 73 3 0x1100090 kqread syslogd
37101 342300 1 0 3 0x100082 netio syslogd
68024 520326 1 0 3 0x100080 kqread resolvd
96749 455746 8324 77 3 0x100092 kqread dhcpleased
72964 334472 8324 77 3 0x100092 kqread dhcpleased
8324 163446 1 0 3 0x80 kqread dhcpleased
32968 197495 0 0 3 0x14200 bored smr
26502 382390 0 0 2 0x14200 zerothread
89209 219981 0 0 3 0x14200 aiodoned aiodoned
45319 181695 0 0 3 0x14200 syncer update
43808 518264 0 0 3 0x14200 cleaner cleaner
63253 434977 0 0 3 0x14200 reaper reaper
92133 490070 0 0 3 0x14200 pgdaemon pagedaemon
70968 177095 0 0 3 0x14200 bored viomb
97015 487191 0 0 3 0x40014200 acpi0 acpi0
7364 75514 0 0 3 0x40014200 idle1
77380 136671 0 0 3 0x14200 bored softnet
82731 257816 0 0 3 0x14200 bored softnet
85106 413990 0 0 3 0x14200 bored softnet
90063 189454 0 0 3 0x14200 bored softnet
50739 21738 0 0 3 0x14200 bored systqmp
63392 50815 0 0 3 0x14200 bored systq
82786 267168 0 0 3 0x40014200 bored softclock
96417 322990 0 0 3 0x40014200 idle0
1 432739 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 10853 (syz-executor.6) thread 0xffff80002e3b17b0 (49221)
exclusive rwlock pf_lock r = 0 (0xffffffff82985bf0)
#0 witness_lock+0x44d
#1 pfioctl+0x5dc6 sys/net/pf_ioctl.c:1608
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531
#4 sys_ioctl+0x4a2
#5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#6 Xsyscall+0x128
exclusive rwlock netlock r = 0 (0xffffffff82949cf0)
#0 witness_lock+0x44d
#1 pfioctl+0x38b8 sys/net/pf_ioctl.c:1608
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531
#4 sys_ioctl+0x4a2
#5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#6 Xsyscall+0x128
exclusive rwlock pfioctl_rw r = 0 (0xffffffff82985c50)
#0 witness_lock+0x44d
#1 pfioctl+0x15e sys/net/pf_ioctl.c:1148
#2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
#3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531
#4 sys_ioctl+0x4a2
#5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a0acc8)
#0 witness_lock+0x44d
#1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514
#2 sys_ioctl+0x4a2
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
Process 63300 (syz-fuzzer) thread 0xffff8000fffefa48 (437824)
exclusive rwlock amaplk r = 0 (0xfffffd806c819278)
#0 witness_lock+0x44d
#1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774
#2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
#5 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffffd806ee65d10)
#0 witness_lock+0x44d
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1762
#2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674
#3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602
#4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
#5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
#6 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10344 6621K 7457K 78643K 17995 0
pcb 13 12K 14K 78643K 311 0
rtable 193 7K 8K 78643K 672 0
ifaddr 84 18K 19K 78643K 278 0
sysctl 2 0K 0K 78643K 2 0
counters 52 35K 36K 78643K 104 0
ioctlops 1 4K 4K 78643K 1876 0
iov 0 0K 12K 78643K 133 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1373 86K 86K 78643K 3415 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 14 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 224 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 17 61K 93K 78643K 1703 0
sigio 0 0K 0K 78643K 19 0
proc 70 91K 115K 78643K 830 0
subproc 104 6K 6K 78643K 224 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 27 0
in_multi 81 5K 6K 78643K 220 0
ether_multi 1 0K 0K 78643K 7 0
mrt 1 0K 0K 78643K 13 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 247 1102K 1102K 78643K 247 0
exec 0 0K 2K 78643K 1512 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 276 232K 232K 78643K 11876 0
UVM aobj 15 2K 2K 78643K 15 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 2 0K 0K 78643K 81 0
NDP 11 0K 1K 78643K 71 0
temp 132 4742K 4986K 78643K 12752 0
kqueue 12 18K 24K 78643K 171 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 150 0 147 3 2 1 3 0 8 0
rtentry 112 218 0 134 4 0 4 4 0 8 0
unpcb 136 1120 0 1105 16 10 6 7 0 8 5
syncache 296 4 0 4 1 1 0 1 0 8 0
tcpqe 32 120 0 120 1 1 0 1 0 8 0
tcpcb 736 316 0 308 17 15 2 7 0 8 1
arp 120 36 0 22 1 0 1 1 0 8 0
inpcb 312 1303 0 1295 17 11 6 7 0 8 5
ip6q 72 3 0 3 1 1 0 1 0 8 0
ip6af 40 9 0 9 1 1 0 1 0 8 0
nd6 48 54 0 33 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 2 0 1 0 8 0
kcovpl 48 17 0 9 1 0 1 1 0 8 0
ppxss 1248 8 0 8 2 2 0 1 0 8 0
pfstscr 40 3 0 3 1 0 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 4 0 3 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
pfrktable 1344 4 1 1 1 0 1 1 0 8 0
pftag 88 4 0 0 1 0 1 1 0 8 0
pfstitem 24 22 0 16 1 0 1 1 0 8 0
pfstkey 112 28 0 22 1 0 1 1 0 8 0
pfstate 336 25 0 19 2 1 1 2 0 8 0
pfrule 1360 64 0 50 2 0 2 2 0 8 0
rttmr 64 3 0 3 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 921 0 540 31 3 28 30 0 8 0
art_table 32 922 0 540 4 0 4 4 0 8 0
art_node 16 217 0 143 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0
semapl 112 222 0 212 1 0 1 1 0 8 0
shmpl 112 12 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3760 0 2323 91 0 91 91 0 8 0
ffsino 272 3760 0 2323 97 0 97 97 0 8 0
nchpl 144 6294 0 4651 63 0 63 63 0 8 0
uvmvnodes 80 5503 0 0 113 0 113 113 0 8 0
vnodes 224 5503 0 0 324 0 324 324 0 8 0
namei 1024 25437 0 25437 2 1 1 2 0 8 1
percpumem 16 64 0 26 1 0 1 1 0 8 0
vcpupl 2048 74 0 0 10 0 10 10 0 8 0
vmpool 560 74 0 0 6 0 6 6 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 74 0 52 3 1 2 3 0 8 0
scxspl 216 16716 0 16716 13 12 1 8 0 8 1
plimitpl 152 285 0 270 1 0 1 1 0 8 0
sigapl 424 2014 0 1946 10 2 8 8 0 8 0
futexpl 64 14395 0 14391 1 0 1 1 0 8 0
knotepl 120 263 0 0 8 0 8 8 0 8 0
kqueuepl 216 355 0 347 7 4 3 5 0 8 2
pipepl 336 522 0 494 7 4 3 6 0 8 0
fdescpl 496 1976 0 1946 6 2 4 5 0 8 0
filepl 152 15047 0 14802 37 21 16 20 0 8 6
lockfpl 104 565 0 563 3 2 1 2 0 8 0
lockfspl 48 106 0 104 1 0 1 1 0 8 0
sessionpl 144 33 0 16 1 0 1 1 0 8 0
pgrppl 48 33 0 16 1 0 1 1 0 8 0
ucredpl 96 2562 0 2550 1 0 1 1 0 8 0
zombiepl 144 1946 0 1946 2 1 1 1 0 8 1
processpl 1064 2014 0 1946 5 0 5 5 0 8 0
procpl 672 5061 0 4979 14 5 9 9 0 8 1
srpgc 96 20 0 20 2 1 1 1 0 8 1
sosppl 168 10 0 10 2 2 0 1 0 8 0
sockpl 480 2577 0 2551 79 67 12 32 0 8 8
mcl64k 65536 12 0 0 2 0 2 2 0 8 0
mcl16k 16384 6 0 0 1 0 1 1 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 199 0 0 25 0 25 25 0 8 0
mtagpl 96 962 0 0 24 0 24 24 0 8 0
mbufpl 256 1208 0 0 74 0 74 74 0 8 0
bufpl 288 6269 0 153 437 0 437 437 0 8 0
anonpl 24 371759 0 354607 146 36 110 123 0 186 0
amapchunkpl 152 32199 0 31526 32 2 30 30 0 158 0
amappl16 200 4817 0 4253 50 17 33 41 0 8 0
amappl15 192 317 0 314 1 0 1 1 0 8 0
amappl14 184 362 0 354 1 0 1 1 0 8 0
amappl13 176 483 0 481 1 0 1 1 0 8 0
amappl12 168 18 0 14 1 0 1 1 0 8 0
amappl11 160 316 0 292 2 0 2 2 0 8 0
amappl10 152 149 0 139 1 0 1 1 0 8 0
amappl9 144 697 0 691 1 0 1 1 0 8 0
amappl8 136 1045 0 991 2 0 2 2 0 8 0
amappl7 128 474 0 460 1 0 1 1 0 8 0
amappl6 120 445 0 428 2 1 1 2 0 8 0
amappl5 112 1223 0 1205 1 0 1 1 0 8 0
amappl4 104 1592 0 1564 2 1 1 2 0 8 0
amappl3 96 5281 0 5236 2 0 2 2 0 8 0
amappl2 88 2646 0 2588 3 1 2 3 0 8 0
amappl1 80 48848 0 48222 21 6 15 20 0 8 1
amappl 88 11237 0 11058 6 1 5 5 0 92 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 14 0 0 1 0 1 1 0 8 0
uaddrrnd 24 2050 0 1946 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2050 0 1946 1 0 1 1 0 8 0
vmmpekpl 168 19524 0 19454 4 0 4 4 0 8 0
vmmpepl 168 197799 0 195097 156 30 126 134 0 357 2
vmsppl 368 2049 0 1946 11 1 10 10 0 8 0
rwobjpl 56 54701 0 47620 102 1 101 101 0 8 0
pdppl 4096 4107 0 3966 254 111 143 143 0 8 2
pvpl 32 831595 0 810228 274 92 182 243 0 265 0
pmappl 248 2049 0 1946 8 1 7 7 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 1093 0 149 27 0 27 27 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
pf_anchor_global_RB_REMOVE(ffffffff82a09208,ffff800000cd5800) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84
pf_remove_if_empty_ruleset(ffff800000cd5c90) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300
pfi_dynaddr_setup(ffff800000ba1778,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485
pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 pf_addr_setup sys/net/pf_ioctl.c:894 [inline]
pfioctl(4900,cd60441a,ffff800000c15000,3,ffff80002e3b17b0) at pfioctl+0x8de7 sys/net/pf_ioctl.c:1656
VOP_IOCTL(fffffd806f6768e8,cd60441a,ffff800000c15000,3,fffffd807f7d7060,ffff80002e3b17b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8067091130,cd60441a,ffff800000c15000,ffff80002e3b17b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80002e3b17b0,ffff80002c934a18,ffff80002c934a70) at sys_ioctl+0x4a2
syscall(ffff80002c934ae0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002c934ae0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd93f2596980, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f kd_curproc sys/dev/kcov.c:578 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2f sys/dev/kcov.c:148
witness_lock(fffffd80082dc6e0,8) at witness_lock+0x4b6 find_instance sys/kern/subr_witness.c:1849 [inline]
witness_lock(fffffd80082dc6e0,8) at witness_lock+0x4b6 sys/kern/subr_witness.c:1155
mtx_enter_try(fffffd80082dc6d0) at mtx_enter_try+0x100
mtx_enter(fffffd80082dc6d0) at mtx_enter+0x4b sys/kern/kern_lock.c:266
pmap_extract(fffffd80082dc6d0,215431000,ffff80002469e0d0) at pmap_extract+0xa2 sys/arch/amd64/amd64/pmap.c:1517
uvm_fault_upper_lookup(ffff80002469e270,ffff80002469e2a8,ffff80002469e170,ffff80002469e1f0) at uvm_fault_upper_lookup+0x129 sys/uvm/uvm_fault.c:852
uvm_fault(fffffd806ee65cf8,215430000,0,2) at uvm_fault+0x139 sys/uvm/uvm_fault.c:607
upageflttrap(ffff80002469e3e0,215430240) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff80002469e3e0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x294bc5420, count: -13