uvm_fault(0xfffffd807f00a8a0, 0x8, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at witness_checkorder+0x121: movl 0x8(%r15),%ebx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xfffffd807f00a8a0, 0x8, 0, 1) -> e
witness_checkorder(ffff800000a5fe18,9,0) at witness_checkorder+0x121 sys/kern/subr_witness.c:776
end trace frame: 0xffff800020b67000, count: 0
ddb{0}> trace
witness_checkorder(ffff800000a5fe18,9,0) at witness_checkorder+0x121 sys/kern/subr_witness.c:776
mtx_enter(ffff800000a5fe08) at mtx_enter+0x3a sys/kern/kern_lock.c:265
filt_bpfread(fffffd806eb7e620,0) at filt_bpfread+0x4e sys/net/bpf.c:1210
kqueue_register(fffffd806e7f4b60,ffff800020b670f0,ffff800020ab1160) at kqueue_register+0x425 sys/kern/kern_event.c:664
sys_kevent(ffff800020ab1160,ffff800020b672b8,ffff800020b67300) at sys_kevent+0x2b1 sys/kern/kern_event.c:527
syscall(ffff800020b67380) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b67380) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff80,0,6,6613bf580e0) at Xsyscall+0x128
end of kernel
end trace frame: 0x6637655c240, count: -7
ddb{0}> show registers
rdi 0
rsi 0x20000 acpi_pdirpa+0xbe68
rbp 0xffff800020b66fc0
rbx 0x70
rdx 0
rcx 0xfffffd8002fdab80
rax 0xffffffff8248eff0 cpu_info_full_primary+0x1ff0
r8 0x7f7fffffc000
r9 0x2b
r10 0xc8f53ad9a7d7366e
r11 0x881cccb5ed16e230
r12 0xdeaf4152deaf4152
r13 0
r14 0xffff800020ab1160
r15 0
rip 0xffffffff811658b1 witness_checkorder+0x121
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800020b66f20
ss 0x10
witness_checkorder+0x121: movl 0x8(%r15),%ebx
ddb{0}> show proc
PROC (syz-executor.0) pid=403766 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab13d8,0xffff800020ab0ef8
process=0xffff800020adca80 user=0xffff800020b62000, vmspace=0xfffffd807f00a8a0
estcpu=0, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
1314 243670 83188 0 7 0 syz-executor.0
1314 453099 83188 0 3 0x4000080 kqread syz-executor.0
* 1314 403766 83188 0 7 0x4000000 syz-executor.0
1314 255455 83188 0 3 0x4000080 fsleep syz-executor.0
83188 523964 20443 0 3 0x82 nanosleep syz-executor.0
20443 195881 22637 0 3 0x82 thrsleep syz-execprog
20443 142353 22637 0 3 0x4000082 thrsleep syz-execprog
20443 266975 22637 0 3 0x4000082 thrsleep syz-execprog
20443 128235 22637 0 3 0x4000082 thrsleep syz-execprog
20443 315228 22637 0 3 0x4000082 thrsleep syz-execprog
20443 321496 22637 0 3 0x4000082 thrsleep syz-execprog
20443 395764 22637 0 3 0x4000082 thrsleep syz-execprog
20443 261453 22637 0 3 0x4000082 thrsleep syz-execprog
20443 444214 22637 0 3 0x4000082 kqread syz-execprog
22637 331214 29853 0 3 0x10008a pause ksh
29853 215402 63743 0 3 0x92 select sshd
41624 359930 1 0 3 0x100083 ttyin getty
63743 353468 1 0 3 0x80 select sshd
72874 459548 429 74 3 0x100092 bpf pflogd
429 447148 1 0 3 0x80 netio pflogd
8982 129626 11831 73 3 0x100090 kqread syslogd
11831 234052 1 0 3 0x100082 netio syslogd
73687 85203 1 77 3 0x100090 poll dhclient
23513 2481 1 0 3 0x80 poll dhclient
37129 472318 0 0 3 0x14200 pgzero zerothread
93612 198165 0 0 3 0x14200 aiodoned aiodoned
91924 329769 0 0 3 0x14200 syncer update
72336 375675 0 0 3 0x14200 cleaner cleaner
36043 278028 0 0 3 0x14200 reaper reaper
35395 126339 0 0 3 0x14200 pgdaemon pagedaemon
95711 31691 0 0 3 0x14200 bored crynlk
33224 175211 0 0 3 0x14200 bored crypto
75911 30836 0 0 3 0x40014200 acpi0 acpi0
27633 435410 0 0 3 0x40014200 idle1
48884 332799 0 0 3 0x14200 bored softnet
72101 391742 0 0 3 0x14200 bored systqmp
87152 375043 0 0 3 0x14200 bored systq
11277 412940 0 0 3 0x40014200 bored softclock
77481 77 0 0 3 0x40014200 idle0
37736 16445 0 0 3 0x14200 bored smr
1 489779 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 1314 (syz-executor.0) thread 0xffff800020ab1160 (403766)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82622388)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9453 6383K 6449K 78643K 10548 0 0
pcb 13 8K 8K 78643K 15 0 0
rtable 63 2K 2K 78643K 169 0 0
ifaddr 26 8K 9K 78643K 34 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1468 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1182 74K 74K 78643K 1188 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 1K 78643K 2 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 2 0K 0K 78643K 2 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 3 8K 12K 78643K 18 0 0
proc 59 63K 83K 78643K 384 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 11 0K 1K 78643K 22 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 18 79K 79K 78643K 18 0 0
exec 0 0K 1K 78643K 199 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 76 12K 12K 78643K 960 0 0
UVM aobj 2 2K 2K 78643K 2 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 4 0K 0K 78643K 7 0 0
temp 41 3544K 3606K 78643K 3338 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 4 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 18 0 15 1 0 1 1 0 8 0
rtentry 112 34 0 11 1 0 1 1 0 8 0
unpcb 120 29 0 19 1 0 1 1 0 8 0
syncache 264 5 0 5 2 2 0 1 0 8 0
tcpcb 544 8 0 5 1 0 1 1 0 8 0
inpcb 280 34 0 27 1 0 1 1 0 8 0
nd6 48 2 0 2 1 0 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 11 0 2 1 0 1 1 0 8 0
pfstkey 112 11 0 2 1 0 1 1 0 8 0
pfstate 328 11 0 2 1 0 1 1 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 256 167 0 47 11 0 11 11 0 8 2
art_table 32 168 0 47 2 0 2 2 0 8 0
art_node 16 33 0 12 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1422 0 20 46 0 46 46 0 8 0
ffsino 272 1422 0 20 94 0 94 94 0 8 0
nchpl 144 1661 0 49 60 0 60 60 0 8 0
uvmvnodes 72 1434 0 0 27 0 27 27 0 8 0
vnodes 208 1434 0 0 76 0 76 76 0 8 0
namei 1024 4146 0 4146 2 1 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 4243 0 4243 9 8 1 7 0 8 1
plimitpl 152 15 0 8 1 0 1 1 0 8 0
sigapl 432 226 0 212 2 0 2 2 0 8 0
futexpl 56 10 0 9 1 0 1 1 0 8 0
knotepl 112 40 0 28 1 0 1 1 0 8 0
kqueuepl 104 4 0 0 1 0 1 1 0 8 0
pipepl 112 154 0 141 2 1 1 1 0 8 0
fdescpl 488 227 0 212 3 0 3 3 0 8 0
filepl 152 1128 0 1064 3 0 3 3 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 112 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 52 0 43 1 0 1 1 0 8 0
zombiepl 144 212 0 212 2 1 1 1 0 8 1
processpl 896 242 0 212 4 0 4 4 0 8 0
procpl 632 253 0 212 4 0 4 4 0 8 0
srpgc 64 2 0 2 1 0 1 1 0 8 1
sockpl 384 81 0 61 2 0 2 2 0 8 0
mcl4k 4096 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 81 0 0 10 0 10 10 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 184 0 0 10 0 10 10 0 8 0
bufpl 256 5886 0 1315 286 0 286 286 0 8 0
anonpl 16 22252 0 20614 15 2 13 13 0 124 6
amapchunkpl 152 806 0 734 5 0 5 5 0 158 2
amappl16 192 138 0 107 2 0 2 2 0 8 0
amappl14 176 35 0 30 2 1 1 1 0 8 0
amappl12 160 5 0 4 2 1 1 1 0 8 0
amappl11 152 54 0 39 1 0 1 1 0 8 0
amappl10 144 17 0 14 1 0 1 1 0 8 0
amappl9 136 463 0 457 1 0 1 1 0 8 0
amappl8 128 130 0 118 1 0 1 1 0 8 0
amappl7 120 33 0 30 1 0 1 1 0 8 0
amappl6 112 81 0 70 1 0 1 1 0 8 0
amappl5 104 122 0 109 1 0 1 1 0 8 0
amappl4 96 495 0 468 1 0 1 1 0 8 0
amappl3 88 118 0 112 1 0 1 1 0 8 0
amappl2 80 958 0 891 3 0 3 3 0 8 1
amappl1 72 15309 0 14874 26 8 18 20 0 8 8
amappl 80 483 0 451 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 227 0 212 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 227 0 212 1 0 1 1 0 8 0
vmmpekpl 168 6421 0 6399 2 0 2 2 0 8 0
vmmpepl 168 32710 0 31723 94 14 80 80 0 357 37
vmsppl 368 226 0 212 2 0 2 2 0 8 0
pdppl 4096 461 0 424 6 0 6 6 0 8 1
pvpl 32 112565 0 108479 119 4 115 115 0 265 81
pmappl 232 226 0 212 1 0 1 1 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 431 0 4 13 0 13 13 0 8 0
ddb{0}>