uvm_fault(0xffffffff8354dee0, 0x7f837bd22c80, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
358697 62430 0 0x14000 0x200 0 zerothread
*129857 22424 0 0x14000 0x200 1 reaper
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd80768ce9c0,0) at uvm_anfree_list+0xd6
amap_wipeout(fffffd806fc24750) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff800029fe4f30,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806bef36e0) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518
uvmspace_free(fffffd806bef36e0) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd8cb0) at reaper+0x246 sys/kern/kern_exit.c:477
end trace frame: 0x0, count: 8
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xffffffff8354dee0, 0x7f837bd22c80, 0, 2) -> e
ddb{1}> trace
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd80768ce9c0,0) at uvm_anfree_list+0xd6
amap_wipeout(fffffd806fc24750) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff800029fe4f30,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806bef36e0) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518
uvmspace_free(fffffd806bef36e0) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd8cb0) at reaper+0x246 sys/kern/kern_exit.c:477
end trace frame: 0x0, count: -7
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800029fe4e30
rbx 0xfffffd80558a7868
rdx 0
rcx 0x7f8000000000
rax 0
r8 0x6f73feb7000
r9 0
r10 0x47b428fe0f3c4198
r11 0xe4f95c824e364927
r12 0
r13 0x800000007f7c7000
r14 0x37bd22c80
r15 0xfffffd80087273c8
rip 0xffffffff829e9cdd pmap_page_remove+0x45d
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800029fe4db0
ss 0x10
pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
ddb{1}> show proc
PROC (reaper) tid=129857 pid=22424 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=4, usrpri=83, slppri=4, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800029fd9448,0xffff800029fd82a0
process=0xffff800029fea448 user=0xffff800029fe0000, vmspace=0xffffffff8354dee0
estcpu=33, cpticks=0, pctcpu=21.55, user=0, sys=21970, intr=141
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
51682 211192 11046 0 3 0x10008a sigsusp sh
11046 6094 7341 0 3 0x82 wait syz-executor
81180 332356 7341 0 3 0x82 piperd syz-executor
92326 11132 7341 0 3 0x82 piperd syz-executor
41625 346310 7341 0 3 0x82 piperd syz-executor
25704 390483 7341 0 3 0x82 piperd syz-executor
32864 235765 7341 0 3 0x82 piperd syz-executor
57148 179436 7341 0 3 0x82 piperd syz-executor
59529 113105 1 0 3 0x100083 ttyin getty
86844 10349 0 0 3 0x14200 bored sosplice
7341 111064 15839 0 3 0x82 wait syz-executor
15839 39864 1432 0 3 0x10008a sigsusp ksh
1432 413271 9405 0 3 0x98 kqread sshd-session
9405 456715 54360 0 3 0x92 kqread sshd-session
54360 48100 1 0 3 0x88 kqread sshd
81911 373492 53422 74 3 0x1100092 bpf pflogd
53422 471845 1 0 3 0x80 sbwait pflogd
71867 161291 16217 73 3 0x1100010 biowait syslogd
16217 415507 1 0 3 0x100082 sbwait syslogd
68875 322498 1 0 3 0x100080 kqread resolvd
86276 257268 70860 77 3 0x100092 kqread dhcpleased
89949 327278 70860 77 3 0x100092 kqread dhcpleased
70860 81995 1 0 3 0x80 kqread dhcpleased
42902 222446 0 0 3 0x14200 bored smr
62430 358697 0 0 7 0x14200 zerothread
54053 80043 0 0 3 0x14200 aiodoned aiodoned
75621 467542 0 0 3 0x14200 syncer update
35663 431401 0 0 3 0x14200 cleaner cleaner
*22424 129857 0 0 7 0x14200 reaper
83418 12130 0 0 3 0x14200 pgdaemon pagedaemon
14316 435561 0 0 3 0x14200 bored viomb
80135 144110 0 0 3 0x40014200 acpi0 acpi0
20999 405446 0 0 3 0x40014200 idle1
97428 290425 0 0 3 0x14200 bored softnet3
26529 304485 0 0 3 0x14200 bored softnet2
31929 7380 0 0 3 0x14200 bored softnet1
12525 161336 0 0 3 0x14200 bored softnet0
62349 369138 0 0 3 0x14200 bored systqmp
2188 464774 0 0 3 0x14200 bored systq
23272 101058 0 0 3 0x14200 tmoslp softclockmp
14957 119695 0 0 3 0x40014200 tmoslp softclock
67017 303963 0 0 3 0x40014200 idle0
1 25490 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bd41bc0)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_page_remove+0xcd rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_page_remove+0xcd pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#3 pmap_page_remove+0xcd sys/arch/amd64/amd64/pmap.c:1974
#4 uvm_anfree_list+0xd6
#5 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502
#6 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
#7 uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518
#8 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#9 reaper+0x246 sys/kern/kern_exit.c:477
#10 proc_trampoline+0x10
Process 71867 (syslogd) thread 0xffff8000ffffd6d8 (161291)
Process 22424 (reaper) thread 0xffff800029fd8cb0 (129857)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 11211K 11539K 166960K 15489 0
pcb 17 18K 20K 166960K 885 0
rtable 172 7K 10K 166960K 3730 0
pf 35 17K 25K 166960K 362 0
ifaddr 36 7K 10K 166960K 518 0
ifgroup 52 2K 2K 166960K 560 0
sysctl 4 1K 1K 166960K 8 0
counters 62 36K 37K 166960K 346 0
ioctlops 0 0K 4K 166960K 1876 0
iov 0 0K 32K 166960K 519 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1588 100K 100K 166960K 5570 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 13K 166960K 60 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 244 0
dirhash 15 2K 3K 166960K 63 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 10 33K 93K 166960K 5128 0
sigio 0 0K 0K 166960K 199 0
proc 72 91K 128K 166960K 3631 0
subproc 91 5K 7K 166960K 1417 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 624 0
in_multi 77 5K 7K 166960K 1331 0
ether_multi 1 0K 0K 166960K 34 0
mrt 1 0K 0K 166960K 10 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 247 1102K 1102K 166960K 247 0
exec 0 0K 1K 166960K 2147 0
pfkey data 0 0K 4K 166960K 7 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 179 71K 92K 166960K 43898 0
UVM aobj 131 8K 8K 166960K 145 0
pinsyscall 35 70K 104K 166960K 8824 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 265 0
NDP 11 0K 2K 166960K 379 0
temp 82 6824K 7066K 166960K 217500 0
kqueue 13 20K 33K 166960K 629 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 510 0 507 2 1 1 2 0 8 0
rtentry 112 1333 0 1261 6 3 3 4 0 8 0
unpcb 144 3768 0 3751 45 44 1 9 0 8 0
syncache 336 16 0 16 7 7 0 1 0 8 0
tcpqe 32 4 0 4 3 3 0 1 0 8 0
tcpcb 808 1630 0 1626 43 41 2 8 0 8 1
arp 120 239 0 226 1 0 1 1 0 8 0
inpcb 336 5774 0 5767 81 79 2 13 0 8 1
nd6 136 361 0 343 1 0 1 1 0 8 0
pkpcb 40 22 0 22 10 10 0 1 0 8 0
kcovpl 48 109 0 102 1 0 1 1 0 8 0
ppxss 1168 33 0 33 11 11 0 1 0 8 0
pffrag 232 44 0 39 1 0 1 1 0 482 0
pffrnode 88 38 0 33 1 0 1 1 0 8 0
pffrent 40 70 0 65 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 3 0 1 1 0 1 1 0 8 0
pfanchor 1288 3 0 0 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfstitem 24 499 0 409 1 0 1 1 0 8 0
pfstkey 128 499 0 409 4 0 4 4 0 8 0
pfstate 376 499 0 409 13 1 12 12 0 8 0
pfrule 1344 62 0 22 5 1 4 4 0 8 0
art_heap8 4096 4 0 0 4 0 4 4 0 8 0
art_heap4 256 5379 0 5014 46 16 30 32 0 8 0
art_table 32 5383 0 5014 5 1 4 5 0 8 0
art_node 16 1320 0 1257 1 0 1 1 0 8 0
sysvmsgpl 40 21 0 12 1 0 1 1 0 8 0
semapl 112 237 0 227 1 0 1 1 0 8 0
shmpl 112 142 0 14 4 0 4 4 0 8 0
dirhash 1024 52 0 33 3 0 3 3 0 8 0
dino2pl 256 8419 0 6721 107 0 107 107 0 8 0
ffsino 272 8419 0 6721 114 0 114 114 0 8 0
nchpl 144 13813 0 12006 68 0 68 68 0 8 0
uvmvnodes 80 7306 0 0 150 0 150 150 0 8 0
vnodes 216 7306 0 0 406 0 406 406 0 8 0
namei 1024 57943 0 57943 10 9 1 2 0 8 1
percpumem 16 187 0 142 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 306 0 284 6 4 2 3 0 8 0
acpiwqpl 32 2 0 2 1 0 1 1 1 8 1
scsiplug 72 4 0 4 4 4 0 1 0 8 0
scxspl 216 97702 0 97701 27 26 1 8 1 8 0
plimitpl 152 1471 0 1454 1 0 1 1 0 8 0
sigapl 424 5277 0 5232 10 3 7 9 0 8 0
futexpl 64 56571 0 56571 9 9 0 1 0 8 0
knotepl 120 802 0 0 25 0 25 25 0 8 0
kqueuepl 216 1384 0 1375 22 21 1 5 0 8 0
pipepl 320 1070 0 1043 28 25 3 8 0 8 0
fdescpl 496 5229 0 5205 8 4 4 5 0 8 0
filepl 152 35376 0 35155 91 79 12 20 0 8 2
lockfpl 104 1925 0 1923 4 3 1 2 0 8 0
lockfspl 48 720 0 718 1 0 1 1 0 8 0
sessionpl 144 140 0 131 1 0 1 1 0 8 0
pgrppl 48 295 0 278 1 0 1 1 0 8 0
ucredpl 104 5795 0 5782 1 0 1 1 0 8 0
zombiepl 144 5234 0 5232 2 1 1 1 0 8 0
processpl 1160 5277 0 5232 6 1 5 6 0 8 0
procpl 648 11271 0 11226 9 3 6 8 0 8 0
srpgc 96 17 0 17 6 6 0 1 0 8 0
sosppl 168 28 0 28 11 11 0 1 0 8 0
sockpl 664 10252 0 10225 121 115 6 23 0 8 3
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 16 0 0 2 0 2 2 0 8 0
mcl4k 4096 177 0 0 18 1 17 18 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 98 0 0 7 2 5 5 0 8 0
mtagpl 96 14 0 0 1 0 1 1 0 8 0
mbufpl 256 8750 0 0 546 0 546 546 0 8 0
bufpl 280 24204 0 17770 523 10 513 523 0 8 0
anonpl 24 697499 0 693536 173 99 74 85 0 185 24
amapchunkpl 152 142553 0 142196 96 61 35 44 0 158 12
amappl16 200 13340 0 13321 159 150 9 26 0 8 5
amappl15 192 11 0 11 2 2 0 1 0 8 0
amappl14 184 336 0 324 1 0 1 1 0 8 0
amappl13 176 5 0 5 2 2 0 1 0 8 0
amappl12 168 7440 0 7415 4 2 2 3 0 8 0
amappl11 160 58 0 43 1 0 1 1 0 8 0
amappl10 152 32 0 32 1 1 0 1 0 8 0
amappl9 144 146 0 146 1 1 0 1 0 8 0
amappl8 136 39 0 36 1 0 1 1 0 8 0
amappl7 128 328 0 314 1 0 1 1 0 8 0
amappl6 120 1132 0 1128 1 0 1 1 0 8 0
amappl5 112 543 0 530 1 0 1 1 0 8 0
amappl4 104 671 0 651 1 0 1 1 0 8 0
amappl3 96 29014 0 28943 4 0 4 4 0 8 0
amappl2 88 2207 0 2134 2 0 2 2 0 8 0
amappl1 80 31393 0 30844 19 5 14 16 0 8 0
amappl 88 42392 0 42274 5 0 5 5 0 92 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 2 0 1 1 0 1 1 0 8 0
dma512 512 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 7 0 7 2 2 0 1 0 8 0
dma32 32 8 0 8 2 2 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 144 0 14 3 0 3 3 0 8 0
uaddrrnd 24 5229 0 5204 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5229 0 5204 1 0 1 1 0 8 0
vmmpekpl 168 41830 0 41772 4 1 3 4 0 8 0
vmmpepl 168 319509 0 317995 177 84 93 105 0 357 9
vmsppl 440 5228 0 5203 6 2 4 5 0 8 0
rwobjpl 56 90908 0 82589 136 14 122 123 0 8 0
pdppl 4096 10465 0 10406 232 161 71 85 0 8 12
pvpl 32 45534 0 0 364 0 364 364 0 265 0
pmappl 248 5228 0 5203 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 1241 0 331 27 0 27 27 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83420ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
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(ffffffff8361b028) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8361b028) at __mp_lock+0x192 sys/kern/kern_lock.c:144
intr_handler(ffff80002a003ba0,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
uvm_pmr_pnaddr(fffffd8004313000,fffffd800816e680,ffff80002a003cc0,ffff80002a003cc8) at uvm_pmr_pnaddr+0xdd sys/uvm/uvm_pmemrange.c:315
uvm_pmr_insert_addr(fffffd8004313000,fffffd800816e680,0) at uvm_pmr_insert_addr+0x91 sys/uvm/uvm_pmemrange.c:416
uvm_pmr_remove_1strange(ffff80002a003de0,0,0,0) at uvm_pmr_remove_1strange+0x869 uvm_pmr_insert sys/uvm/uvm_pmemrange.c:479 [inline]
uvm_pmr_remove_1strange(ffff80002a003de0,0,0,0) at uvm_pmr_remove_1strange+0x869 sys/uvm/uvm_pmemrange.c:697
uvm_pagezero_thread(ffff800029fd87a0) at uvm_pagezero_thread+0x22e sys/uvm/uvm_pmemrange.c:2208
end trace frame: 0x0, count: 5
ddb{0}> trace
x86_ipi_db(ffffffff83420ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
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(ffffffff8361b028) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff8361b028) at __mp_lock+0x192 sys/kern/kern_lock.c:144
intr_handler(ffff80002a003ba0,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
uvm_pmr_pnaddr(fffffd8004313000,fffffd800816e680,ffff80002a003cc0,ffff80002a003cc8) at uvm_pmr_pnaddr+0xdd sys/uvm/uvm_pmemrange.c:315
uvm_pmr_insert_addr(fffffd8004313000,fffffd800816e680,0) at uvm_pmr_insert_addr+0x91 sys/uvm/uvm_pmemrange.c:416
uvm_pmr_remove_1strange(ffff80002a003de0,0,0,0) at uvm_pmr_remove_1strange+0x869 uvm_pmr_insert sys/uvm/uvm_pmemrange.c:479 [inline]
uvm_pmr_remove_1strange(ffff80002a003de0,0,0,0) at uvm_pmr_remove_1strange+0x869 sys/uvm/uvm_pmemrange.c:697
uvm_pagezero_thread(ffff800029fd87a0) at uvm_pagezero_thread+0x22e sys/uvm/uvm_pmemrange.c:2208
end trace frame: 0x0, count: -10
ddb{0}> machine ddbcpu 1
Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1)
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd80768ce9c0,0) at uvm_anfree_list+0xd6
amap_wipeout(fffffd806fc24750) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff800029fe4f30,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806bef36e0) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518
uvmspace_free(fffffd806bef36e0) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd8cb0) at reaper+0x246 sys/kern/kern_exit.c:477
end trace frame: 0x0, count: 8
ddb{1}> trace
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd8008727360) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree_list(fffffd80768ce9c0,0) at uvm_anfree_list+0xd6
amap_wipeout(fffffd806fc24750) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff800029fe4f30,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd806bef36e0) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518
uvmspace_free(fffffd806bef36e0) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd8cb0) at reaper+0x246 sys/kern/kern_exit.c:477
end trace frame: 0x0, count: -7