uvm_fault(0xffffffff83a2d578, 0xffff800029a34223, 0, 2) -> d
kernel: page fauvm_fault(0xffffffff83a2d578, 0xffff800029ee6000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*154056 69152 0 0 0x4000001 0 syz-executor
kcov_remote_enter(0,ffff80002a79fa90) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff8389bd30,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a7360a0,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(61) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff83477bf5) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff8000338c8e90) at kerntrap+0x230 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0xffff8000338c9150, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xffffffff83a2d578, 0xffff800029ee6000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff80002a79fa90) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff8389bd30,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a7360a0,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(61) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff83477bf5) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff8000338c8e90) at kerntrap+0x230 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memset() at memset+0x49
ffs_write(ffff8000338c9230) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401
VOP_WRITE(fffff9806b74b8c0,ffff8000338c92e0,3,fffff98007ffd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002a77c7e0,fffff9806b74b8c0,fffff98007ffd7b8,ffff8000338c93b0,ffff8000338c9390) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff8000338c9520) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff8000338c9520) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1e971b48780, count: -21
ddb> show registers
rdi 0
rsi 0xffff800000c16c00
rbp 0xffff8000338c89b0
rbx 0xffff80002a79fa90
rdx 0xffff80002a77c7e0
rcx 0xffff800029ee6000
rax 0xfffff9806cac2d20
r8 0x101010101010101
r9 0x8080808080808080
r10 0xff0f19ae79266b86
r11 0x31a0ca41212d9c9a
r12 0xffffffff810638d0 endtsleep
r13 0xffff80002a736008
r14 0xffff80002a79fa90
r15 0
rip 0xffffffff82b5cff2 kcov_remote_enter+0x122
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff8000338c8990
ss 0x10
kcov_remote_enter+0x122: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor) tid=154056 pid=69152 tcnt=3 stat=onproc
flags process=0 proc=4000001<INKTR,THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a77d770,0xffff80002a77d4e8
process=0xffff8000314b9b18 user=0xffff8000338c4000, vmspace=0xfffff9806d37ed08
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
75256 481331 34842 0 2 0 syz-executor
75256 236807 34842 0 3 0x4000080 lockf syz-executor
12731 136994 16789 0 3 0x80 nanoslp syz-executor
12731 491455 16789 0 3 0x4000080 lockf syz-executor
12731 484787 16789 0 3 0x4000080 fsleep syz-executor
15824 510039 1 0 3 0x82 nanoslp getty
69152 457958 77121 0 2 0 syz-executor
*69152 154056 77121 0 7 0x4000001 syz-executor
69152 54633 77121 0 3 0x4000080 fsleep syz-executor
17403 484530 29324 0 2 0xc80 syz-executor
17403 461413 29324 0 3 0x4000080 lockf syz-executor
17403 94946 29324 0 3 0x4000080 fsleep syz-executor
88396 62028 7249 0 3 0x80 nanoslp syz-executor
88396 265038 7249 0 3 0x4000080 sbwait syz-executor
88396 151566 7249 0 3 0x4000080 fsleep syz-executor
85896 484269 54478 0 3 0x80 nanoslp syz-executor
85896 283482 54478 0 3 0x4000080 ttyin syz-executor
85896 18950 54478 0 3 0x4000080 fsleep syz-executor
7249 302788 38135 0 3 0x82 nanoslp syz-executor
16789 484141 38135 0 2 0xc82 syz-executor
34842 208282 38135 0 2 0xc82 syz-executor
18682 501087 38135 0 2 0x2 syz-executor
54478 286929 38135 0 3 0x82 nanoslp syz-executor
29324 459092 38135 0 3 0x82 nanoslp syz-executor
15584 288255 38135 0 3 0x82 nanoslp syz-executor
77121 267468 38135 0 3 0x82 nanoslp syz-executor
38135 484679 1 0 3 0x82 kqread syz-executor
84195 51942 1 73 3 0x1100090 kqread syslogd
16042 432506 0 0 3 0x14200 bored smr
10324 193806 0 0 2 0x14200 zerothread
12593 252125 0 0 3 0x14200 aiodoned aiodoned
21688 379163 0 0 3 0x14200 syncer update
20917 349622 0 0 3 0x14200 cleaner cleaner
99747 382620 0 0 3 0x14200 reaper reaper
44805 215154 0 0 3 0x14200 pgdaemon pagedaemon
34397 145429 0 0 3 0x14200 bored viomb
27789 207746 0 0 3 0x40014200 acpi0 acpi0
3964 484371 0 0 3 0x14200 bored softnet0
44445 380317 0 0 3 0x14200 bored systqmp
84088 298820 0 0 3 0x14200 bored systq
99700 208712 0 0 3 0x40014200 tmoslp softclock
44306 306337 0 0 3 0x40014200 idle0
1 283079 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11034 12133K 12649K 166960K 12706 0
pcb 20 13K 14K 166960K 117 0
rtable 210 7K 8K 166960K 393 0
pf 32 13K 20K 166960K 88 0
ifaddr 37 6K 7K 166960K 61 0
ifgroup 48 2K 2K 166960K 83 0
sysctl 4 1K 9K 166960K 10 0
counters 33 17K 18K 166960K 49 0
ioctlops 0 0K 4K 166960K 130 0
iov 0 0K 12K 166960K 141 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1396 88K 88K 166960K 1766 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 6 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 23 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 97K 166960K 459 0
sigio 0 0K 0K 166960K 2 0
proc 20 25K 91K 166960K 548 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 46 0
in_multi 86 6K 7K 166960K 108 0
ether_multi 1 0K 0K 166960K 2 0
mrt 1 0K 0K 166960K 13 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 61 281K 281K 166960K 61 0
exec 0 0K 2K 166960K 401 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 158 83K 151K 166960K 5728 0
UVM aobj 6 2K 2K 166960K 7 0
pinsyscall 21 42K 96K 166960K 1567 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 20 0
NDP 11 0K 2K 166960K 42 0
temp 75 9116K 9139K 166960K 12264 0
kqueue 4 6K 28K 166960K 83 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 63 0 63 1 0 1 1 0 8 1
rtentry 136 114 0 22 4 0 4 4 0 8 0
unpcb 144 205 0 197 3 0 3 3 0 8 2
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpcb 736 79 0 76 1 0 1 1 0 8 0
arp 96 18 0 6 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 313 0 306 4 0 4 4 0 8 3
nd6 112 25 0 3 1 0 1 1 0 8 0
pkpcb 40 4 0 4 1 0 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1072 15 0 14 1 0 1 1 0 8 0
pfstscr 40 2 0 0 1 0 1 1 0 8 0
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 1 0 0 1 0 1 1 0 8 0
pfanchor 1288 4 0 0 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfqueue 320 5 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 128 2 0 0 1 0 1 1 0 8 0
pfstate 384 1 0 0 1 0 1 1 0 8 0
pfrule 1360 2 0 2 1 0 1 1 0 8 1
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 256 463 0 52 29 0 29 29 0 8 2
art_table 40 464 0 52 5 0 5 5 0 8 0
art_node 32 113 0 30 1 0 1 1 0 8 0
sysvmsgpl 40 37 0 35 1 0 1 1 0 8 0
semapl 72 20 0 10 1 0 1 1 0 8 0
shmpl 112 4 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2197 0 731 93 0 93 93 0 8 0
ffsino 256 2197 0 731 93 0 93 93 0 8 0
nchpl 144 2819 0 1117 64 0 64 64 0 8 0
vnodes 216 2554 0 0 142 0 142 142 0 8 0
namei 1024 8942 0 8941 2 0 2 2 0 8 1
kstatmem 264 53 0 30 2 0 2 2 0 8 0
scsiplug 72 5 0 5 1 0 1 1 0 8 1
scxspl 216 15533 0 15533 8 0 8 8 1 8 8
plimitpl 152 148 0 137 1 0 1 1 0 8 0
sigapl 424 758 0 725 6 0 6 6 0 8 1
knotepl 120 16053 0 16030 10 0 10 10 0 8 8
kqueuepl 184 99 0 96 1 0 1 1 0 8 0
pipepl 304 198 0 170 8 0 8 8 0 8 5
fdescpl 448 743 0 723 5 0 5 5 0 8 1
filepl 120 3722 0 3527 10 0 10 10 0 8 2
lockfpl 104 120 0 114 1 0 1 1 0 8 0
lockfspl 48 53 0 51 1 0 1 1 0 8 0
sessionpl 144 46 0 43 1 0 1 1 0 8 0
pgrppl 48 55 0 44 1 0 1 1 0 8 0
ucredpl 104 444 0 439 1 0 1 1 0 8 0
zombiepl 144 726 0 725 1 0 1 1 0 8 0
processpl 1152 758 0 725 4 0 4 4 0 8 0
procpl 664 1247 0 1203 6 0 6 6 0 8 1
sosppl 176 2 0 2 1 0 1 1 0 8 1
sockpl 552 597 0 581 6 0 6 6 0 8 4
mcl64k 65536 79 0 79 1 0 1 1 0 8 1
mcl16k 16384 34 0 34 1 0 1 1 0 8 1
mcl12k 12288 5 0 5 1 0 1 1 0 8 1
mcl9k128 9344 2 0 2 1 0 1 1 0 8 1
mcl8k 8192 16 0 16 1 0 1 1 0 8 1
mcl4k 4096 3051 0 2999 14 0 14 14 0 8 6
mcl2k 2048 383 0 379 1 0 1 1 0 8 0
mtagpl 96 7 0 5 1 0 1 1 0 8 0
mbufpl 256 8174 0 8021 18 0 18 18 0 8 6
bufpl 272 6900 0 684 415 0 415 415 0 8 0
anonpl 24 132175 0 130257 64 0 64 64 0 186 26
amapchunkpl 152 19107 0 18702 35 0 35 35 0 158 18
amappl16 200 2195 0 2170 19 7 12 19 0 8 8
amappl15 192 6 0 6 1 0 1 1 0 8 1
amappl14 184 407 0 407 1 0 1 1 0 8 1
amappl13 176 131 0 129 1 0 1 1 0 8 0
amappl12 168 997 0 978 2 0 2 2 0 8 0
amappl11 160 1 0 1 1 0 1 1 0 8 1
amappl10 152 64 0 62 1 0 1 1 0 8 0
amappl9 144 270 0 269 1 0 1 1 0 8 0
amappl8 136 180 0 180 1 0 1 1 0 8 1
amappl7 128 141 0 136 1 0 1 1 0 8 0
amappl6 120 148 0 148 1 0 1 1 0 8 1
amappl5 112 94 0 93 1 0 1 1 0 8 0
amappl4 104 280 0 272 1 0 1 1 0 8 0
amappl3 96 3496 0 3407 4 0 4 4 0 8 1
amappl2 88 521 0 506 2 0 2 2 0 8 0
amappl1 80 11471 0 11316 13 0 13 13 0 8 5
amappl 88 4930 0 4794 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 0 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 0 1 1 0 8 1
dma128 128 255 0 255 1 0 1 1 0 8 1
dma64 64 8 0 8 1 0 1 1 0 8 1
dma32 32 7 0 7 1 0 1 1 0 8 1
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 6 0 1 1 0 1 1 0 8 0
uaddrrnd 24 743 0 723 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 743 0 723 1 0 1 1 0 8 0
vmmpekpl 168 7860 0 7836 2 0 2 2 0 8 0
vmmpepl 168 55009 0 54046 85 0 85 85 0 357 28
vmsppl 368 742 0 723 4 0 4 4 0 8 1
rwobjpl 40 17734 0 17235 11 0 11 11 0 8 0
pdppl 4096 1492 0 1446 96 44 52 82 0 8 6
pvpl 32 345366 0 340143 130 0 130 130 0 265 52
pmappl 216 742 0 723 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 783 0 44 22 0 22 22 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff80002a79fa90) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff8389bd30,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a7360a0,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(61) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff83477bf5) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff8000338c8e90) at kerntrap+0x230 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memset() at memset+0x49
ffs_write(ffff8000338c9230) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401
VOP_WRITE(fffff9806b74b8c0,ffff8000338c92e0,3,fffff98007ffd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002a77c7e0,fffff9806b74b8c0,fffff98007ffd7b8,ffff8000338c93b0,ffff8000338c9390) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff8000338c9520) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff8000338c9520) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1e971b48780, count: -21
ddb> machine ddbcpu 1
No such command
ddb> trace
kcov_remote_enter(0,ffff80002a79fa90) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff8389bd30,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffff80002a7360a0,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(61) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff83477bf5) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,2,ffff8000338c8e90) at db_ktrap+0x1b4 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff8000338c8e90) at kerntrap+0x230 sys/arch/amd64/amd64/trap.c:519
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memset() at memset+0x49
ffs_write(ffff8000338c9230) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401
VOP_WRITE(fffff9806b74b8c0,ffff8000338c92e0,3,fffff98007ffd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff80002a77c7e0,fffff9806b74b8c0,fffff98007ffd7b8,ffff8000338c93b0,ffff8000338c9390) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a77c7e0,36,0,ffff8000338c9470) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff8000338c9520) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff8000338c9520) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1e971b48780, count: -21
ddb>