login: witness: lock order reversal:
1st 0xffffffff83ab2620 &sched_lock (&sched_lock)
2nd 0xffff8000299bee30 &cq->cq_mtx (&cq->cq_mtx)
lock order [1] &sched_lock (&sched_lock) -> [2] &cq->cq_mtx (&cq->cq_mtx)
#0 mtx_enter+0x95 sys/kern/kern_lock.c:406
#1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323
#2 mi_switch+0x187 sys/kern/sched_bsd.c:376
#3 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#4 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline]
#4 sys_futex+0xb90 sys/kern/sys_futex.c:155
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
lock order [2] &cq->cq_mtx (&cq->cq_mtx) -> [1] &sched_lock (&sched_lock)
#0 mtx_enter+0x95 sys/kern/kern_lock.c:406
#1 sleep_setup+0xed sys/kern/kern_synch.c:304
#2 msleep_nsec+0x10b sys/kern/kern_synch.c:217
#3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589
#4 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
#4 dtclose+0x109 sys/dev/dt/dt_dev.c:239
#5 spec_close+0x466 sys/kern/spec_vnops.c:-1
#6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#8 fdrop+0x121 sys/kern/kern_descrip.c:1281
#9 closef+0x192 sys/kern/kern_descrip.c:1265
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#11 Xsyscall+0x128
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}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff8000299bee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
mtx_enter(ffff8000299bee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406
clockintr_cancel(ffff8000299be2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323
mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369
sys_futex(ffff800035bc94e8,ffff8000337c4d60,ffff8000337c4cb0) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline]
sys_futex(ffff800035bc94e8,ffff8000337c4d60,ffff8000337c4cb0) at sys_futex+0xb90 sys/kern/sys_futex.c:155
syscall(ffff8000337c4d60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000337c4d60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd7808e77fa0, count: -9
ddb{1}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff8000337c4930
rbx 0
rdx 0xffff8000015e8340
rcx 0xffff800035bc94e8
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff8000337c4810
r9 0x8080808080808080
r10 0xd49b8a99f640cdb2
r11 0x9c1fc3b6b5b1759a
r12 0xfffffd800402c300
r13 0xfffffd800481cd58
r14 0x3
r15 0xffffffff834b0c55 substchar+0x93dc
rip 0xffffffff81c226d5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff8000337c4920
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=261648 pid=75052 tcnt=2 stat=sleep
flags process=4000000<ITIMER> proc=4000080<SINTR,THREAD>
runpri=86, usrpri=86, slppri=32, nice=20
wchan=0xffff8000337c4bd0, wmesg=fsleep, ps_single=0x0 scnt=0 ecnt=0
forw=0x0, list=0xffff800035bc82c0,0xffff800035bc9cc0
process=0xffff8000fffeab70 user=0xffff8000337bf000, vmspace=0xfffffd807878b7b8
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
74304 476685 99220 0 2 0 syz-executor
75052 327778 92645 0 7 0x4000000 syz-executor
*75052 261648 92645 0 3 0x4000080 fsleep syz-executor
67416 20808 99897 0 2 0 syz-executor
67416 39001 99897 0 3 0x4000080 fsleep syz-executor
57526 306346 15105 0 2 0 syz-executor
57526 438020 15105 0 3 0x4000080 fifow syz-executor
57501 512032 84917 0 2 0 syz-executor
57501 316691 84917 0 3 0x4000080 fsleep syz-executor
87439 449335 80227 0 4 0x82000 syz-executor
87439 149663 80227 0 3 0x4082000 biowait syz-executor
87439 204547 80227 0 4 0x4082000 syz-executor
87439 182894 80227 0 3 0x4002000 suspend syz-executor
4203 386482 14530 0 3 0x80 nanoslp syz-executor
4203 75446 14530 0 3 0x4000080 sbwait syz-executor
4203 125912 14530 0 3 0x4000080 fsleep syz-executor
4707 92110 46449 0 3 0x80 nanoslp syz-executor
4707 408415 46449 0 3 0x4000080 sbwait syz-executor
4707 200785 46449 0 3 0x4000080 fsleep syz-executor
40707 248762 1 0 3 0x82 nanoslp getty
80227 481332 988 0 3 0x82 nanoslp syz-executor
46449 19879 988 0 3 0x82 nanoslp syz-executor
99897 159433 988 0 3 0x82 nanoslp syz-executor
99220 373180 988 0 3 0x82 nanoslp syz-executor
14530 303344 988 0 3 0x82 nanoslp syz-executor
92645 307116 988 0 3 0x82 nanoslp syz-executor
84917 155053 988 0 3 0x82 nanoslp syz-executor
15105 59731 988 0 3 0x82 nanoslp syz-executor
988 408918 30038 0 3 0x82 kqread syz-executor
30038 487516 12 0 3 0x10008a sigsusp ksh
12 335116 5312 0 3 0x98 kqread sshd-session
5312 114194 81248 0 3 0x92 kqread sshd-session
81248 137313 1 0 3 0x88 kqread sshd
13217 230866 96098 74 3 0x1100092 bpf pflogd
96098 519315 1 0 3 0x80 sbwait pflogd
33584 480343 63477 73 3 0x1100090 kqread syslogd
63477 20961 1 0 3 0x100082 sbwait syslogd
17378 491709 1 0 3 0x100080 kqread resolvd
14215 379580 34901 77 3 0x100092 kqread dhcpleased
46296 467320 34901 77 3 0x100092 kqread dhcpleased
34901 105711 1 0 3 0x80 kqread dhcpleased
6949 262281 0 0 3 0x14200 bored smr
89713 71683 0 0 2 0x14200 zerothread
29380 307860 0 0 3 0x14200 aiodoned aiodoned
89174 51556 0 0 3 0x14200 syncer update
43806 15626 0 0 3 0x14200 cleaner cleaner
98620 154790 0 0 3 0x14200 reaper reaper
18181 144729 0 0 3 0x14200 pgdaemon pagedaemon
54870 70982 0 0 3 0x14200 bored viomb
5332 233947 0 0 3 0x40014200 acpi0 acpi0
81304 457032 0 0 3 0x40014200 idle1
8987 334505 0 0 3 0x14200 bored softnet1
1637 472768 0 0 3 0x14200 bored softnet0
22201 251144 0 0 3 0x14200 bored systqmp
56256 2717 0 0 3 0x14200 bored systq
24882 273210 0 0 3 0x14200 tmoslp softclockmp
79188 28094 0 0 3 0x40014200 tmoslp softclock
32156 463740 0 0 3 0x40014200 idle0
1 167953 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &sched_lock r = 0 (0xffffffff83ab2620)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 sleep_finish+0x1d6 sys/kern/kern_synch.c:357
#3 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline]
#3 sys_futex+0xb90 sys/kern/sys_futex.c:155
#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 75052 (syz-executor) thread 0xffff800035bc82c0 (327778)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8395eb80)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
#2 Xintr_ioapic_edge23_untramp+0x18f
#3 __sanitizer_cov_trace_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline]
#3 __sanitizer_cov_trace_cmp4+0x1d sys/dev/kcov.c:206
#4 uvm_map_protect+0x6fa sys/uvm/uvm_map.c:3149
#5 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd807878b8b8)
#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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 87439 (syz-executor) thread 0xffff800035bc6d18 (149663)
exclusive rrwlock inode r = 0 (0xfffffd806f0878f0)
#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:570
#5 vn_write+0x18f sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11077 12215K 14034K 166960K 12750 0
pcb 17 14K 16K 166960K 178 0
rtable 235 8K 8K 166960K 398 0
pf 41 18K 18K 166960K 71 0
ifaddr 46 8K 8K 166960K 58 0
ifgroup 59 2K 2K 166960K 75 0
sysctl 4 1K 9K 166960K 73 0
counters 78 37K 37K 166960K 100 0
ioctlops 0 0K 4K 166960K 1742 0
iov 0 0K 12K 166960K 23 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1423 89K 90K 166960K 1705 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 15 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 380 0
sigio 0 0K 0K 166960K 5 0
proc 72 115K 164K 166960K 616 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 28 0
in_multi 99 7K 7K 166960K 107 0
ether_multi 1 0K 0K 166960K 4 0
mrt 0 0K 0K 166960K 15 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 424 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 233 143K 152K 166960K 5401 0
UVM aobj 72 136K 136K 166960K 72 0
pinsyscall 43 86K 103K 166960K 1561 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 30 0
NDP 14 0K 2K 166960K 38 0
temp 45 9076K 9143K 166960K 13954 0
kqueue 14 22K 28K 166960K 73 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 47 0 44 1 0 1 1 0 8 0
rtentry 176 119 0 15 6 0 6 6 0 8 0
unpcb 144 210 0 186 2 0 2 2 0 8 1
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpcb 736 100 0 96 4 0 4 4 0 8 3
arp 136 19 0 1 1 0 1 1 0 8 0
inpcb 328 600 0 592 7 0 7 7 0 8 5
nd6 152 27 0 0 2 0 2 2 0 8 0
pkpcb 40 1 0 1 1 0 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 15 0 11 1 0 1 1 0 8 0
pffrag 232 2 0 0 1 0 1 1 0 482 0
pffrnode 88 2 0 0 1 0 1 1 0 8 0
pffrent 40 2 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
pfstitem 24 35 0 0 1 0 1 1 0 8 0
pfstkey 128 35 0 0 2 0 2 2 0 8 0
pfstate 448 34 0 0 4 0 4 4 0 8 0
pfrule 1360 22 0 17 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 513 0 43 30 0 30 30 0 8 0
art_table 40 514 0 43 5 0 5 5 0 8 0
art_node 32 119 0 26 1 0 1 1 0 8 0
semapl 112 13 0 3 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2097 0 626 93 0 93 93 0 8 0
ffsino 296 2097 0 626 114 0 114 114 0 8 0
nchpl 144 2641 0 939 64 0 64 64 0 8 0
rtmask 32 2 0 1 1 0 1 1 0 8 0
vnodes 216 2385 0 0 133 0 133 133 0 8 0
namei 1024 9065 0 9065 1 0 1 1 0 8 1
percpumem 16 65 0 11 1 0 1 1 0 8 0
vcpupl 3968 67 0 0 9 0 9 9 0 8 0
vmpool 848 67 0 0 8 0 8 8 0 8 0
kstatmem 264 46 0 16 3 0 3 3 0 8 1
scsiplug 72 2 0 2 1 0 1 1 0 8 1
scxspl 216 9814 0 9813 9 1 8 8 1 8 7
plimitpl 152 113 0 95 1 0 1 1 0 8 0
sigapl 424 705 0 657 7 0 7 7 0 8 1
knotepl 120 311 0 0 10 0 10 10 0 8 0
kqueuepl 224 99 0 87 1 0 1 1 0 8 0
pipepl 344 205 0 178 6 0 6 6 0 8 3
fdescpl 528 688 0 656 3 0 3 3 0 8 0
filepl 160 4108 0 3882 18 0 18 18 0 8 6
lockfpl 104 167 0 163 1 0 1 1 0 8 0
lockfspl 48 47 0 43 1 0 1 1 0 8 0
sessionpl 144 24 0 16 1 0 1 1 0 8 0
pgrppl 48 37 0 21 1 0 1 1 0 8 0
ucredpl 104 602 0 588 1 0 1 1 0 8 0
zombiepl 144 657 0 657 1 0 1 1 0 8 1
processpl 1232 705 0 657 5 0 5 5 0 8 0
procpl 664 1124 0 1065 6 0 6 6 0 8 0
sosppl 176 4 0 4 1 0 1 1 0 8 1
sockpl 752 931 0 896 11 0 11 11 0 8 6
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 125 0 0 16 0 16 16 0 8 0
mcl2k 2048 18 0 0 3 0 3 3 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 416 0 0 26 0 26 26 0 8 0
bufpl 280 3454 0 118 239 0 239 239 0 8 0
anonpl 32 5686 0 0 46 0 46 46 0 246 0
amapchunkpl 152 16407 0 15922 26 0 26 26 0 158 4
amappl16 200 2367 0 2304 7 2 5 5 0 8 0
amappl15 192 8 0 8 1 1 0 1 0 8 0
amappl14 184 438 0 437 1 0 1 1 0 8 0
amappl13 176 133 0 121 1 0 1 1 0 8 0
amappl12 168 988 0 958 2 0 2 2 0 8 0
amappl11 160 6 0 6 1 1 0 1 0 8 0
amappl10 152 72 0 56 1 0 1 1 0 8 0
amappl9 144 264 0 264 1 1 0 1 0 8 0
amappl8 136 115 0 113 1 0 1 1 0 8 0
amappl7 128 62 0 60 1 0 1 1 0 8 0
amappl6 120 282 0 270 1 0 1 1 0 8 0
amappl5 112 85 0 76 1 0 1 1 0 8 0
amappl4 104 511 0 470 2 0 2 2 0 8 0
amappl3 96 2742 0 2652 3 0 3 3 0 8 0
amappl2 88 845 0 775 2 0 2 2 0 8 0
amappl1 80 10886 0 10288 15 1 14 14 0 8 0
amappl 88 4609 0 4444 5 0 5 5 0 92 0
uvmvnodes 80 107 0 0 3 0 3 3 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 1 0 1 1 0 1 1 0 8 1
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 71 0 0 2 0 2 2 0 8 0
uaddrrnd 24 688 0 656 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 688 0 656 1 0 1 1 0 8 0
vmmpekpl 168 7614 0 7583 2 0 2 2 0 8 0
vmmpepl 168 52168 0 50170 93 0 93 93 0 357 3
vmsppl 488 687 0 656 5 0 5 5 0 8 1
rwobjpl 80 17413 0 16271 26 0 26 26 0 8 1
pdppl 4096 1517 0 1379 160 22 138 140 0 8 0
pvpl 32 14443 0 0 118 1 117 117 0 265 0
pmappl 256 754 0 656 7 0 7 7 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 358 0 25 10 0 10 10 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83942ff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
mtx_enter(ffffffff83ab2610) at mtx_enter+0x375 sys/kern/kern_lock.c:455
wakeup_n(fffffd80601a6138,ffffffff) at wakeup_n+0x54 sys/kern/kern_synch.c:581
sd_buf_done(fffffd806cf81448) at sd_buf_done+0x2de sys/scsi/sd.c:772
scsi_done(fffffd806cf81448) at scsi_done+0x40 sys/scsi/scsi_base.c:1496
vioscsi_vq_done(ffff8000000a4268) at vioscsi_vq_done+0xe1 sys/dev/pv/vioscsi.c:-1
intr_handler(ffff80003c4050f0,ffff8000002a3480) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:564
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__sanitizer_cov_trace_cmp4(3,0) at __sanitizer_cov_trace_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline]
__sanitizer_cov_trace_cmp4(3,0) at __sanitizer_cov_trace_cmp4+0x1d sys/dev/kcov.c:206
uvm_map_protect(fffffd807878b7b8,d78e8242000,d78e8642000,3,0,0,74c8f61a6a7789b4) at uvm_map_protect+0x6fa sys/uvm/uvm_map.c:3149
sys_mprotect(ffff800035bc82c0,ffff80003c4053c0,ffff80003c405310) at sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
syscall(ffff80003c4053c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4053c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x729188976ae0, count: -16
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(ffff8000299bee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
mtx_enter(ffff8000299bee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406
clockintr_cancel(ffff8000299be2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323
mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369
sys_futex(ffff800035bc94e8,ffff8000337c4d60,ffff8000337c4cb0) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline]
sys_futex(ffff800035bc94e8,ffff8000337c4d60,ffff8000337c4cb0) at sys_futex+0xb90 sys/kern/sys_futex.c:155
syscall(ffff8000337c4d60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000337c4d60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd7808e77fa0, count: -9