panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
87120 30027 0 0x14000 0x200 1 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112
uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701
uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674
uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601
kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memcpy() at memcpy+0x15
timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline]
timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676
softclock_process_tick_timeout(ffff800021263868,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
end trace frame: 0xffff80002116f180, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112
uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701
uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674
uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601
kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memcpy() at memcpy+0x15
timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline]
timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676
softclock_process_tick_timeout(ffff800021263868,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff8274bff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -18
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002116ea10
rbx 0xffff80002116ea20
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff81fea4a5 kprintf+0x145
r9 0x1
r10 0x59018cf6dc66fe54
r11 0xcaa5853ade55025e
r12 0x3000000008
r13 0xffff80002116eac0
r14 0x100
r15 0x1
rip 0xffffffff8176bbc8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002116ea00
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (idle0) pid=295287 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
pri=0, usrpri=50, nice=20
forw=0x4874c101874ab361, list=0xffff800021169ce0,0xffff800021168a90
process=0xffff8000ffffea30 user=0xffff80002116a000, vmspace=0xffffffff8294cc08
estcpu=0, cpticks=22471, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
47506 31741 49037 0 3 0x82 nanoslp syz-executor.1
67573 178365 49037 0 2 0x482 syz-executor.0
49037 296881 93748 0 3 0x82 kqread syz-fuzzer
49037 189915 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 206897 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 103283 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 523646 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 516799 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 68557 93748 0 3 0x4000082 thrsleep syz-fuzzer
49037 151006 93748 0 3 0x4000082 thrsleep syz-fuzzer
93748 288606 42864 0 3 0x10008a sigsusp ksh
42864 446668 43715 0 3 0x92 select sshd
28530 59153 1 0 3 0x100083 ttyin getty
43715 159203 1 0 3 0x80 select sshd
5405 19762 61274 74 3 0x100092 bpf pflogd
61274 352360 1 0 3 0x80 netio pflogd
39345 41784 98444 73 3 0x100090 kqread syslogd
98444 363179 1 0 3 0x100082 netio syslogd
38738 220255 1 77 3 0x100090 poll dhclient
34568 161309 1 0 3 0x80 poll dhclient
84988 150950 0 0 3 0x14200 bored smr
58869 44915 0 0 3 0x14200 pgzero zerothread
12584 425142 0 0 3 0x14200 aiodoned aiodoned
37088 5608 0 0 3 0x14200 syncer update
8701 229485 0 0 3 0x14200 cleaner cleaner
30027 87120 0 0 7 0x14200 reaper
85813 118794 0 0 3 0x14200 pgdaemon pagedaemon
46030 157310 0 0 3 0x14200 bored crynlk
26892 311524 0 0 3 0x14200 bored crypto
41907 65704 0 0 3 0x14200 bored viomb
15313 451841 0 0 3 0x40014200 acpi0 acpi0
27014 50493 0 0 3 0x40014200 idle1
48372 273318 0 0 2 0x14200 softnet
47711 488180 0 0 2 0x14200 systqmp
3645 264723 0 0 3 0x14200 bored systq
30339 480524 0 0 3 0x40014200 bored softclock
*34260 295287 0 0 7 0x40014200 idle0
1 248428 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff82773060)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 kcov_remote_leave+0x1f sys/dev/kcov.c:674
#4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline]
#4 timeout_run+0xd6 sys/kern/kern_timeout.c:676
#5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#6 softclock+0x11a sys/kern/kern_timeout.c:752
#7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#8 Xsoftclock+0x1f
#9 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#10 sched_idle+0x417 sys/kern/kern_sched.c:178
#11 proc_trampoline+0x1c
shared mutex timeout r = 0 (0xffffffff82733ca0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 timeout_run+0xb7 sys/kern/kern_timeout.c:670
#2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#3 softclock+0x11a sys/kern/kern_timeout.c:752
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x1f
#6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x417 sys/kern/kern_sched.c:178
#8 proc_trampoline+0x1c
Process 34260 (idle0) thread 0xffff800021169a40 (295287)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82802250)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
#2 Xsoftclock+0x1f
#3 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#4 sched_idle+0x417 sys/kern/kern_sched.c:178
#5 proc_trampoline+0x1c
exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff82773060)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 kcov_remote_leave+0x1f sys/dev/kcov.c:674
#4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline]
#4 timeout_run+0xd6 sys/kern/kern_timeout.c:676
#5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#6 softclock+0x11a sys/kern/kern_timeout.c:752
#7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#8 Xsoftclock+0x1f
#9 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#10 sched_idle+0x417 sys/kern/kern_sched.c:178
#11 proc_trampoline+0x1c
shared mutex timeout r = 0 (0xffffffff82733ca0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 timeout_run+0xb7 sys/kern/kern_timeout.c:670
#2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#3 softclock+0x11a sys/kern/kern_timeout.c:752
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x1f
#6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x417 sys/kern/kern_sched.c:178
#8 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9498 6484K 6621K 78643K 10745 0
pcb 13 8K 8K 78643K 17 0
rtable 105 3K 3K 78643K 197 0
ifaddr 49 11K 11K 78643K 50 0
counters 44 34K 34K 78643K 44 0
ioctlops 0 0K 4K 78643K 1469 0
iov 0 0K 2K 78643K 1768 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 1 0
vnodes 1218 77K 77K 78643K 1248 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 1K 1K 78643K 2 0
sem 10 0K 0K 78643K 12 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 4 9K 25K 78643K 25550 0
proc 60 63K 95K 78643K 438 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 33 2K 2K 78643K 33 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 2K 78643K 358 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 270 38K 39K 78643K 299567 0
UVM aobj 11 6K 6K 78643K 11 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 7 0K 0K 78643K 11 0
temp 72 3968K 4032K 78643K 53113 0
kqueue 3 4K 5K 78643K 5 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 25 0 23 1 0 1 1 0 8 0
rtentry 112 45 0 1 2 0 2 2 0 8 0
unpcb 120 190 0 180 1 0 1 1 0 8 0
syncache 296 4 0 4 1 1 0 1 0 8 0
tcpqe 32 774 0 774 1 1 0 1 0 8 0
tcpcb 736 10 0 6 1 0 1 1 0 8 0
inpcb 304 58 0 52 1 0 1 1 0 8 0
nd6 48 6 0 0 1 0 1 1 0 8 0
kcovpl 48 2 0 0 1 0 1 1 0 8 0
pffrent 40 2 0 2 1 1 0 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 12 0 10 1 0 1 1 0 8 0
pfstkey 112 12 0 10 1 0 1 1 0 8 0
pfstate 320 12 0 10 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 256 188 0 0 12 0 12 12 0 8 0
art_table 32 189 0 0 2 0 2 2 0 8 0
art_node 16 44 0 4 1 0 1 1 0 8 0
sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 26946 0 25541 88 0 88 88 0 8 0
ffsino 272 26946 0 25541 95 1 94 94 0 8 0
nchpl 144 52692 0 51084 60 0 60 60 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 106642 0 106642 2 1 1 1 0 8 1
percpumem 16 33 0 0 1 0 1 1 0 8 0
scxspl 216 158116 0 158116 9 8 1 8 0 8 1
plimitpl 152 19 0 11 1 0 1 1 0 8 0
sigapl 424 25765 0 25734 4 0 4 4 0 8 0
futexpl 56 93994 0 93994 1 0 1 1 0 8 1
knotepl 112 64 0 44 1 0 1 1 0 8 0
kqueuepl 168 24717 0 24715 1 0 1 1 0 8 0
pipepl 336 145 0 134 4 2 2 2 0 8 1
fdescpl 496 25749 0 25734 3 0 3 3 0 8 0
filepl 152 51933 0 51832 8 3 5 5 0 8 1
lockfpl 104 9 0 8 1 0 1 1 0 8 0
lockfspl 48 5 0 4 1 0 1 1 0 8 0
sessionpl 144 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 65 0 56 1 0 1 1 0 8 0
zombiepl 144 25734 0 25732 2 1 1 1 0 8 0
processpl 1080 25765 0 25732 3 0 3 3 0 8 0
procpl 672 52440 0 52399 5 1 4 4 0 8 0
sockpl 432 273 0 255 3 0 3 3 0 8 0
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 34 0 0 2 0 2 2 0 8 0
mcl9k 9216 25 0 0 2 0 2 2 0 8 0
mcl8k 8192 12 0 0 2 0 2 2 0 8 0
mcl4k 4096 18 0 0 3 1 2 3 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 236 0 0 23 0 23 23 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 516 0 0 20 2 18 19 0 8 0
bufpl 280 28880 0 22614 448 0 448 448 0 8 0
anonpl 24 6290364 0 6263853 170 6 164 164 0 186 1
amapchunkpl 152 708367 0 707416 47 7 40 40 0 158 1
amappl16 200 44787 0 43967 45 1 44 44 0 8 0
amappl15 192 60 0 54 1 0 1 1 0 8 0
amappl14 184 12774 0 12770 1 0 1 1 0 8 0
amappl13 176 26 0 25 1 0 1 1 0 8 0
amappl12 168 35 0 27 1 0 1 1 0 8 0
amappl11 160 57 0 43 1 0 1 1 0 8 0
amappl10 152 24 0 13 1 0 1 1 0 8 0
amappl9 144 286 0 286 2 2 0 1 0 8 0
amappl8 136 372 0 316 2 0 2 2 0 8 0
amappl7 128 61 0 51 1 0 1 1 0 8 0
amappl6 120 104 0 89 1 0 1 1 0 8 0
amappl5 112 12889 0 12878 1 0 1 1 0 8 0
amappl4 104 13279 0 13251 1 0 1 1 0 8 0
amappl3 96 4418 0 4413 1 0 1 1 0 8 0
amappl2 88 13230 0 13184 2 0 2 2 0 8 0
amappl1 80 421828 0 421430 15 5 10 12 0 8 1
amappl 88 299260 0 299072 5 0 5 5 0 92 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 64 10 0 0 1 0 1 1 0 8 0
uaddrrnd 24 25749 0 25734 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 25749 0 25734 1 0 1 1 0 8 0
vmmpekpl 168 101696 0 101668 2 0 2 2 0 8 0
vmmpepl 168 2821677 0 2819631 127 27 100 124 0 357 2
vmsppl 368 25748 0 25733 2 0 2 2 0 8 0
rwobjpl 56 464937 0 463366 23 0 23 23 0 8 0
pdppl 4096 51505 0 51466 63 22 41 45 0 8 2
pvpl 32 10356002 0 10326296 268 21 247 249 0 265 2
pmappl 232 25748 0 25733 2 1 1 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 326 0 32 9 0 9 9 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e78c0) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(ffffffff827fe8d0,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_read(ffffffff827fe8c0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112
uvmfault_lookup(ffff80002116edb0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701
uvm_fault_check(ffff80002116edb0,ffff80002116ede8,ffff80002116ee10) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674
uvm_fault(ffffffff827fe8b8,ffff8000232af000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601
kpageflttrap(ffff80002116ef40,ffff8000232affe0) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff80002116ef40) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memcpy() at memcpy+0x15
timeout_run(ffff800021263868) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline]
timeout_run(ffff800021263868) at timeout_run+0xd6 sys/kern/kern_timeout.c:676
softclock_process_tick_timeout(ffff800021263868,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff8274bff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -18
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:149
uvm_map_teardown(fffffd807effa450) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2763
uvmspace_free(fffffd807effa450) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655
reaper(ffff8000211b3268) at reaper+0x189 sys/kern/kern_exit.c:462
end trace frame: 0x0, count: 8
ddb{1}> trace
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:149
uvm_map_teardown(fffffd807effa450) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2763
uvmspace_free(fffffd807effa450) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655
reaper(ffff8000211b3268) at reaper+0x189 sys/kern/kern_exit.c:462
end trace frame: 0x0, count: -7