kernel: protection fault trap, code=0
Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
witness_checkorder(deadbeefdeadc007,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadbff7) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002a1f4220
rbx 0
rdx 0
rcx 0xffff8000ffffdc90
rax 0xffffffff8392affe cpu_info_full_primary+0x1ffe
r8 0xffffffffffffffff
r9 0
r10 0x65f4e50b80dddc22
r11 0x3d0e8bf6d1b37f5f
r12 0xdeadbeefdeadc0fe
r13 0x9
r14 0xdeadbeefdeadc007
r15 0
rip 0xffffffff81807395 witness_checkorder+0xb5
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a1f4180
ss 0x10
witness_checkorder+0xb5: movl 0x20(%r14),%r15d
ddb{0}> show proc
PROC (reaper) tid=374697 pid=37197 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=32, usrpri=51, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffffc88,0xffff8000ffffd4d8
process=0xffff8000ffffb4f0 user=0xffff80002a1ef000, vmspace=0xffffffff83a54290
estcpu=1, cpticks=5, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
99008 341366 0 0 3 0x14280 nfsidl nfsio
31717 232319 31450 0 2 0 syz-executor
31717 365472 31450 0 3 0x4000080 sysctllk syz-executor
35318 489693 0 0 3 0x14280 nfsidl nfsio
3109 160965 0 0 3 0x14280 nfsidl nfsio
48837 59854 0 0 3 0x14280 nfsidl nfsio
77913 280957 0 0 3 0x14280 nfsidl nfsio
14126 371740 0 0 3 0x14280 nfsidl nfsio
42199 474369 0 0 3 0x14280 nfsidl nfsio
15336 342521 0 0 3 0x14280 nfsidl nfsio
46325 398616 0 0 3 0x14280 nfsidl nfsio
60828 170947 71361 0 3 0x80 nanoslp syz-executor
60828 195263 71361 0 3 0x4000080 kqread syz-executor
60828 467776 71361 0 3 0x4000080 kqread syz-executor
60828 243296 71361 0 3 0x4000080 fsleep syz-executor
89386 386037 6012 0 2 0x11 syz-executor
89386 460335 6012 0 2 0x4000010 syz-executor
89386 512608 6012 0 2 0x4000011 syz-executor
74021 73114 44855 0 2 0x1 syz-executor
74021 341481 44855 0 3 0x4000080 netcon syz-executor
74021 267877 44855 0 3 0x4000080 fsleep syz-executor
31982 105163 77390 0 2 0 syz-executor
31982 111097 77390 0 3 0x4000080 fsleep syz-executor
31982 268211 77390 0 3 0x4000080 fsleep syz-executor
31982 258611 77390 0 3 0x4000080 fsleep syz-executor
2077 267791 74486 0 2 0 syz-executor
2077 73733 74486 0 2 0x4000001 syz-executor
44855 326875 50821 0 3 0x82 nanoslp syz-executor
77390 178341 50821 0 3 0x82 nanoslp syz-executor
23732 494086 50821 0 2 0x2 syz-executor
3092 371794 50821 0 3 0x82 nanoslp syz-executor
31450 323547 50821 0 3 0x82 nanoslp syz-executor
6012 126819 50821 0 3 0x82 nanoslp syz-executor
71361 207047 50821 0 3 0x82 nanoslp syz-executor
74486 325150 50821 0 3 0x82 nanoslp syz-executor
50821 134730 36988 0 3 0x82 kqread syz-executor
36988 306418 92400 0 3 0x10008a sigsusp ksh
92400 497861 51130 0 3 0x98 kqread sshd-session
51130 337642 33837 0 3 0x92 kqread sshd-session
73826 342418 1 0 3 0x100083 ttyin getty
33837 365250 1 0 3 0x88 kqread sshd
49830 195529 98405 74 3 0x1100092 bpf pflogd
98405 399042 1 0 3 0x80 sbwait pflogd
54072 374092 75325 73 3 0x1100090 kqread syslogd
75325 279437 1 0 3 0x100082 sbwait syslogd
60025 392135 1 0 3 0x100080 kqread resolvd
28104 438756 57681 77 3 0x100092 kqread dhcpleased
88217 76300 57681 77 3 0x100092 kqread dhcpleased
57681 243406 1 0 3 0x80 kqread dhcpleased
31526 277969 0 0 3 0x14200 bored smr
81192 54065 0 0 2 0x14200 zerothread
30413 138637 0 0 3 0x14200 aiodoned aiodoned
27527 136347 0 0 3 0x14200 syncer update
25391 85653 0 0 3 0x14200 cleaner cleaner
*37197 374697 0 0 7 0x14200 reaper
4408 127065 0 0 3 0x14200 pgdaemon pagedaemon
65807 379064 0 0 3 0x14200 bored viomb
33154 335843 0 0 3 0x40014200 acpi0 acpi0
63928 235289 0 0 3 0x40014200 idle1
38860 96081 0 0 3 0x14200 bored softnet1
46399 482577 0 0 2 0x14200 softnet0
40341 20915 0 0 3 0x14200 bored systqmp
37519 253650 0 0 3 0x14200 bored systq
44417 517779 0 0 3 0x14200 tmoslp softclockmp
42260 504484 0 0 3 0x40014200 tmoslp softclock
94434 61319 0 0 3 0x40014200 idle0
1 93367 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 89386 (syz-executor) thread 0xffff80003739aa88 (460335)
exclusive rwlock sysctllk r = 0 (0xffffffff839bbe18)
#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 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:192
#3 sys_sysctl+0x371 sys/kern/kern_sysctl.c:304
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#5 Xsyscall+0x128
Process 23732 (syz-executor) thread 0xffff80002a2214d8 (494086)
exclusive rrwlock inode r = 0 (0xfffffa006c50ec58)
#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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vget+0x2a2 sys/kern/vfs_subr.c:686
#6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffa006c50ea08)
#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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vget+0x2a2 sys/kern/vfs_subr.c:686
#6 cache_lookup+0x351 sys/kern/vfs_cache.c:222
#7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160
#8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#10 namei+0x7c5 sys/kern/vfs_lookup.c:250
#11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806
#12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#13 Xsyscall+0x128
Process 37197 (reaper) thread 0xffff8000ffffdc90 (374697)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a57a40)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298
#4 knote_processexit+0x2b sys/kern/kern_event.c:2235
#5 reaper+0x26d sys/kern/kern_exit.c:513
#6 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11055 12086K 12159K 166960K 12157 0
pcb 19 12K 12K 166960K 31 0
rtable 243 7K 7K 166960K 374 0
pf 34 17K 24K 166960K 58 0
ifaddr 43 7K 7K 166960K 45 0
ifgroup 55 2K 2K 166960K 55 0
sysctl 1 1K 9K 166960K 70 0
counters 70 37K 37K 166960K 70 0
ioctlops 0 0K 4K 166960K 1489 0
iov 0 0K 6K 166960K 70 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1296 82K 82K 166960K 1373 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 4 0K 0K 166960K 7 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 97K 166960K 158 0
proc 73 131K 180K 166960K 558 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 2 0
in_multi 99 7K 7K 166960K 102 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 3 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 393 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 235 167K 188K 166960K 3309 0
UVM aobj 5 2K 2K 166960K 5 0
pinsyscall 41 82K 106K 166960K 1354 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 3 0
NDP 15 0K 2K 166960K 28 0
temp 39 9118K 9134K 166960K 5170 0
kqueue 16 23K 25K 166960K 31 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 39 0 36 1 0 1 1 0 8 0
rtentry 176 112 0 2 5 0 5 5 0 8 0
unpcb 144 62 0 45 1 0 1 1 0 8 0
syncache 336 5 0 5 1 1 0 1 0 8 0
tcpcb 736 18 0 12 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 96 0 84 2 0 2 2 0 8 0
nd6 152 24 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 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 2 0 0 1 0 1 1 0 8 0
pfstitem 24 21 0 0 1 0 1 1 0 8 0
pfstkey 128 21 0 0 1 0 1 1 0 8 0
pfstate 448 21 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 15 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 452 0 0 29 0 29 29 0 8 0
art_table 40 453 0 0 5 0 5 5 0 8 0
art_node 32 111 0 11 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 72 5 0 3 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1598 0 126 93 0 93 93 0 8 0
ffsino 296 1598 0 126 114 0 114 114 0 8 0
nchpl 144 1829 0 123 64 0 64 64 0 8 0
vnodes 216 1697 0 0 95 0 95 95 0 8 0
namei 1024 5711 0 5711 3 2 1 2 0 8 1
percpumem 16 50 0 0 1 0 1 1 0 8 0
kstatmem 264 27 0 0 2 0 2 2 0 8 0
scxspl 216 6333 0 6333 4 3 1 3 1 8 1
plimitpl 152 31 0 14 1 0 1 1 0 8 0
sigapl 424 495 0 439 8 1 7 7 0 8 0
knotepl 120 62 0 0 2 0 2 2 0 8 0
kqueuepl 224 30 0 18 1 0 1 1 0 8 0
pipepl 344 132 0 105 3 0 3 3 0 8 0
fdescpl 528 470 0 440 3 0 3 3 0 8 0
filepl 160 1798 0 1576 10 0 10 10 0 8 0
lockfpl 104 25 0 22 1 0 1 1 0 8 0
lockfspl 48 13 0 10 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 34 0 17 1 0 1 1 0 8 0
ucredpl 104 98 0 84 1 0 1 1 0 8 0
zombiepl 144 448 0 447 2 1 1 1 0 8 0
processpl 1232 495 0 439 5 0 5 5 0 8 0
procpl 664 541 0 473 6 0 6 6 0 8 0
sockpl 752 199 0 167 5 1 4 5 0 8 0
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 110 0 0 14 0 14 14 0 8 0
mcl2k 2048 17 0 0 3 0 3 3 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 167 0 0 11 0 11 11 0 8 0
bufpl 272 2337 0 105 149 0 149 149 0 8 0
anonpl 32 7883 0 0 64 0 64 64 0 246 0
amapchunkpl 152 8854 0 8368 22 0 22 22 0 158 1
amappl16 200 1434 0 1412 14 0 14 14 0 8 12
amappl15 192 5 0 5 1 1 0 1 0 8 0
amappl14 184 437 0 436 1 0 1 1 0 8 0
amappl13 176 128 0 116 1 0 1 1 0 8 0
amappl12 168 727 0 698 2 0 2 2 0 8 0
amappl11 160 2 0 2 1 1 0 1 0 8 0
amappl10 152 65 0 50 1 0 1 1 0 8 0
amappl9 144 276 0 276 1 1 0 1 0 8 0
amappl8 136 110 0 108 1 0 1 1 0 8 0
amappl7 128 160 0 147 1 0 1 1 0 8 0
amappl6 120 163 0 161 1 0 1 1 0 8 0
amappl5 112 100 0 90 1 0 1 1 0 8 0
amappl4 104 300 0 279 1 0 1 1 0 8 0
amappl3 96 1612 0 1499 4 0 4 4 0 8 0
amappl2 88 660 0 599 2 0 2 2 0 8 0
amappl1 80 11136 0 10530 17 0 17 17 0 8 2
amappl 88 2547 0 2384 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 4 0 0 1 0 1 1 0 8 0
uaddrrnd 24 470 0 440 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 470 0 440 1 0 1 1 0 8 0
vmmpekpl 168 6144 0 6110 2 0 2 2 0 8 0
vmmpepl 168 40230 0 38354 109 8 101 109 0 357 7
vmsppl 488 469 0 439 5 0 5 5 0 8 1
rwobjpl 80 14960 0 13920 32 1 31 32 0 8 4
pdppl 4096 947 0 878 103 30 73 87 0 8 4
pvpl 32 15008 0 0 122 0 122 122 0 265 0
pmappl 256 469 0 439 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 425 0 35 12 0 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
witness_checkorder(deadbeefdeadc007,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadbff7) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) 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(ffffffff83a57240) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a57240) at __mp_lock+0x192 sys/kern/kern_lock.c:173
uvn_detach(fffffa006c1fdd80) at uvn_detach+0x7e sys/uvm/uvm_vnode.c:-1
uvm_unmap_detach(ffff80003c3feb70,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370
uvm_map_teardown(fffffa000f0c57c0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536
exit1(ffff8000fffe82b8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffe82b8,ffff80003c3fed40,ffff80003c3fec90) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c3fed40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3fed40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7159b62b5040, count: -11