uvm_fault(0xfffffd806040c028, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff8163e348 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a2dbf20
gsbase 0xffff8000299ddff0 kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff8163e348
Starting stack trace...
panic(ffffffff833e2d77) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a2dbe70) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff8000016b9000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593
dtclose(11e5f,1,2000,ffff800033bdefb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,1,2000,ffff800033bdefb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239
spec_close(ffff80002a2dc020) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8060487a48,1,fffffd80097fd548,ffff800033bdefb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806c5bf178,ffff800033bdefb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806c5bf178,ffff800033bdefb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806c5bf178,ffff800033bdefb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806c5bf178,ffff800033bdefb0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff800033bdefb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff800033bdefb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff800033bdefb0,ffff80002a2dc390,ffff80002a2dc2e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a2dc390) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2dc390) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ac934cf7940, count: 242
End of stack trace.
WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0
Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*344198 65399 0 0x2 0 1 ndp
35553 85762 0 0x14000 0x200 0 reaper
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x6f9b8ccaf5a0, count: 14
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(0xfffffd806040c028, 0x0, 0, 1) -> e
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x6f9b8ccaf5a0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003c47bc10
rbx 0
rdx 0
rcx 0xffff8000fffee7e0
rax 0x2a
r8 0xffff80003c47bb40
r9 0x1
r10 0xa6a5c45e659bbe95
r11 0x595a92afa5bae650
r12 0
r13 0
r14 0
r15 0
rip 0xffffffff831a54c7 proc_trampoline+0xc7
cs 0x8
rflags 0x246
rsp 0xffff80003c47bb90
ss 0x10
proc_trampoline+0xc7: movl $0,%gs:0x688
ddb{1}> show proc
PROC (ndp) tid=344198 pid=65399 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=86, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffeea78,0xffffffff839edbe8
process=0xffff80003c419830 user=0xffff80003c476000, vmspace=0xfffffd800b0631e8
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*65399 344198 50393 0 7 0x2 ndp
50393 216282 96273 0 3 0x10008a sigsusp sh
67860 327584 12552 0 3 0x80 nanoslp syz-executor
67860 348861 12552 0 3 0x4000080 kqread syz-executor
50887 275964 32829 60929 3 0x90 nanoslp syz-executor
50887 432820 32829 60929 3 0x4000090 kqsel syz-executor
50887 79407 32829 60929 3 0x4000090 fsleep syz-executor
96273 490413 6990 0 3 0x82 wait syz-executor
11270 280165 29037 0 3 0x80 nanoslp syz-executor
11270 25068 29037 0 3 0x4000080 kqsel syz-executor
11270 513557 29037 0 3 0x4000080 fsleep syz-executor
11270 17994 29037 0 3 0x4000080 fsleep syz-executor
70505 85621 54316 0 3 0x80 nanoslp syz-executor
70505 367475 54316 0 3 0x4000080 kqread syz-executor
70505 245078 54316 0 3 0x4000080 fsleep syz-executor
69683 106006 90747 0 3 0x80 nanoslp syz-executor
69683 297956 90747 0 3 0x4000080 kqsel syz-executor
69683 384631 90747 0 3 0x4000080 fsleep syz-executor
90747 400079 6990 0 3 0x82 nanoslp syz-executor
59342 403250 0 0 3 0x14280 nfsidl nfsio
63634 25823 0 0 3 0x14280 nfsidl nfsio
61412 177722 0 0 3 0x14280 nfsidl nfsio
62511 377544 0 0 3 0x14280 nfsidl nfsio
87330 397140 0 0 3 0x14200 acct acct
54316 84712 6990 0 3 0x82 nanoslp syz-executor
64505 489725 6990 0 3 0x82 nanoslp syz-executor
29037 15975 6990 0 3 0x82 nanoslp syz-executor
74542 390796 6990 0 3 0x2 biowait syz-executor
12552 451601 6990 0 3 0x82 nanoslp syz-executor
32829 103085 6990 0 3 0x82 nanoslp syz-executor
6990 251605 24436 0 3 0x82 kqread syz-executor
24436 221566 73693 0 3 0x10008a sigsusp ksh
73693 452698 31497 0 3 0x98 kqread sshd-session
31497 24557 45402 0 3 0x92 kqread sshd-session
48578 399765 1 0 3 0x100083 ttyin getty
45402 335930 1 0 3 0x88 kqread sshd
51815 402641 85312 74 3 0x1100092 bpf pflogd
85312 102544 1 0 3 0x80 sbwait pflogd
67675 329326 13699 73 3 0x1100090 kqread syslogd
13699 351745 1 0 3 0x100082 sbwait syslogd
66868 486586 1 0 3 0x100080 kqread resolvd
73367 171278 79844 77 3 0x100092 kqread dhcpleased
43056 25354 79844 77 3 0x100092 kqread dhcpleased
79844 476100 1 0 3 0x80 kqread dhcpleased
3185 279171 0 0 3 0x14200 bored smr
93145 152559 0 0 3 0x14200 pgzero zerothread
4205 484972 0 0 3 0x14200 aiodoned aiodoned
61384 39786 0 0 3 0x14200 syncer update
92970 36398 0 0 3 0x14200 cleaner cleaner
85762 35553 0 0 7 0x14200 reaper
72416 231826 0 0 3 0x14200 pgdaemon pagedaemon
70743 441577 0 0 3 0x14200 bored viomb
10333 318527 0 0 3 0x40014200 acpi0 acpi0
36502 444983 0 0 3 0x40014200 idle1
42864 113926 0 0 3 0x14200 bored softnet1
64327 179633 0 0 3 0x14200 bored softnet0
6608 238426 0 0 3 0x14200 smrbar systqmp
87958 29424 0 0 3 0x14200 syncxs systq
78211 457916 0 0 3 0x14200 tmoslp softclockmp
38769 244686 0 0 3 0x40014200 tmoslp softclock
14404 367095 0 0 3 0x40014200 idle0
1 364142 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 0:
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83a13f40)
#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 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1377
#3 km_free+0x36b sys/uvm/uvm_km.c:710
#4 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304
#5 reaper+0x1ca sys/kern/kern_exit.c:493
#6 proc_trampoline+0x10
Process 74542 (syz-executor) thread 0xffff8000ffffc7d0 (390796)
exclusive rrwlock inode r = 0 (0xfffffd806e91bca8)
#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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159
#5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
#8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
#9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113
#10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d40e1f8)
#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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6 namei+0x7ca sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
#9 Xsyscall+0x128
Process 6608 (systqmp) thread 0xffff8000ffffe000 (238426)
shared rwlock systqmp r = 0 (0xffffffff8385a508)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
Process 87958 (systq) thread 0xffff8000ffffe530 (29424)
shared rwlock systq r = 0 (0xffffffff8385a468)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11103 12187K 12425K 166960K 12916 0
pcb 20 17K 19K 166960K 210 0
rtable 218 9K 10K 166960K 508 0
pf 31 16K 19K 166960K 110 0
ifaddr 39 7K 8K 166960K 89 0
ifgroup 48 2K 2K 166960K 139 0
sysctl 3 1K 9K 166960K 12 0
counters 68 36K 38K 166960K 168 0
ioctlops 0 0K 4K 166960K 1856 0
iov 0 0K 16K 166960K 43 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1416 89K 90K 166960K 2146 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 10K 166960K 20 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 33 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 110K 166960K 909 0
sigio 0 0K 0K 166960K 13 0
proc 73 115K 180K 166960K 668 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 119 0
in_multi 85 6K 7K 166960K 151 0
ether_multi 1 0K 0K 166960K 4 0
mrt 1 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 235 1049K 1049K 166960K 235 0
exec 0 0K 1K 166960K 663 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 249 169K 183K 166960K 10100 0
UVM aobj 22 8K 8K 166960K 26 0
pinsyscall 43 86K 104K 166960K 2078 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 77 0
NDP 13 0K 1K 166960K 63 0
temp 61 8679K 8931K 166960K 36713 0
kqueue 16 26K 30K 166960K 189 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
vscsiccb 40 1 0 0 1 0 1 1 0 8 0
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 191 0 188 3 2 1 2 0 8 0
rtentry 176 149 0 58 6 0 6 6 0 8 0
unpcb 144 656 0 638 5 4 1 4 0 8 0
syncache 336 5 0 5 2 2 0 1 0 8 0
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 736 413 0 406 16 9 7 10 0 8 6
arp 136 26 0 8 1 0 1 1 0 8 0
inpcb 328 1074 0 1061 20 13 7 9 0 8 5
nd6 152 30 0 9 1 0 1 1 0 8 0
pkpcb 40 3 0 3 2 2 0 1 0 8 0
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 39 0 39 2 1 1 1 0 8 1
pppxif 1504 2 0 2 2 2 0 1 0 8 0
pffrag 232 8 0 2 1 0 1 1 0 482 0
pffrnode 88 7 0 2 1 0 1 1 0 8 0
pffrent 40 13 0 6 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 3 2 1 1 1 0 8 1
pfrule 1360 1 0 1 1 1 0 1 0 8 0
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 674 0 282 31 0 31 31 0 8 5
art_table 40 676 0 282 5 0 5 5 0 8 0
art_node 32 149 0 68 1 0 1 1 0 8 0
sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0
semupl 112 2 0 2 2 2 0 1 0 8 0
semapl 112 31 0 21 1 0 1 1 0 8 0
shmpl 112 20 0 4 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 3117 0 1613 96 0 96 96 0 8 0
ffsino 296 3117 0 1613 118 0 118 118 0 8 0
nchpl 144 4391 0 2688 64 0 64 64 0 8 0
rtmask 32 9 0 9 2 1 1 1 0 8 1
vnodes 216 3620 0 0 202 0 202 202 0 8 0
namei 1024 15475 0 15474 2 1 1 2 0 8 0
percpumem 16 99 0 50 1 0 1 1 0 8 0
vcpupl 3968 3 0 0 1 0 1 1 0 8 0
vmpool 848 3 0 0 1 0 1 1 0 8 0
kstatmem 264 84 0 60 4 2 2 3 0 8 0
scsiplug 72 3 0 3 1 0 1 1 0 8 1
scxspl 216 32668 0 32666 14 11 3 8 1 8 2
plimitpl 152 212 0 194 1 0 1 1 0 8 0
sigapl 424 1239 0 1186 10 3 7 9 0 8 0
knotepl 120 568 0 0 17 0 17 17 0 8 0
kqueuepl 224 339 0 324 7 2 5 5 0 8 4
pipepl 344 187 0 158 3 0 3 3 0 8 0
fdescpl 528 1185 0 1153 3 0 3 3 0 8 0
filepl 160 7501 0 7273 23 7 16 16 0 8 6
lockfpl 104 313 0 311 1 0 1 1 0 8 0
lockfspl 48 137 0 135 1 0 1 1 0 8 0
sessionpl 144 25 0 16 1 0 1 1 0 8 0
pgrppl 48 80 0 63 1 0 1 1 0 8 0
ucredpl 104 1202 0 1188 1 0 1 1 0 8 0
zombiepl 144 1187 0 1186 1 0 1 1 0 8 0
processpl 1232 1239 0 1186 7 2 5 7 0 8 0
procpl 664 2552 0 2489 9 3 6 8 0 8 0
sosppl 176 6 0 6 2 1 1 1 0 8 1
sockpl 752 1954 0 1920 25 14 11 13 0 8 7
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 126 0 0 16 0 16 16 0 8 0
mcl2k 2048 18 0 0 3 0 3 3 0 8 0
mtagpl 96 4 0 0 1 0 1 1 0 8 0
mbufpl 256 1129 0 0 71 0 71 71 0 8 0
bufpl 280 13665 0 7529 439 0 439 439 0 8 0
anonpl 32 10230 0 0 83 0 83 83 0 246 0
amapchunkpl 152 33929 0 33436 47 18 29 41 0 158 8
amappl16 200 4896 0 4865 20 5 15 18 0 8 5
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 2 0 2 1 1 0 1 0 8 0
amappl13 176 461 0 459 1 0 1 1 0 8 0
amappl12 168 1557 0 1515 3 0 3 3 0 8 0
amappl11 160 7 0 6 1 0 1 1 0 8 0
amappl10 152 48 0 34 1 0 1 1 0 8 0
amappl9 144 247 0 246 2 1 1 1 0 8 0
amappl8 136 24 0 22 1 0 1 1 0 8 0
amappl7 128 89 0 87 1 0 1 1 0 8 0
amappl6 120 305 0 291 1 0 1 1 0 8 0
amappl5 112 87 0 76 1 0 1 1 0 8 0
amappl4 104 431 0 401 1 0 1 1 0 8 0
amappl3 96 5773 0 5681 4 1 3 3 0 8 0
amappl2 88 1295 0 1218 2 0 2 2 0 8 0
amappl1 80 12498 0 11889 15 1 14 15 0 8 0
amappl 88 9200 0 9033 5 0 5 5 0 92 0
uvmvnodes 80 130 0 0 3 0 3 3 0 8 0
dma65536 65536 1 0 1 1 1 0 1 0 8 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 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 255 0 254 3 2 1 1 0 8 0
dma64 64 7 0 7 2 2 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 25 0 4 1 0 1 1 0 8 0
uaddrrnd 24 1185 0 1153 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1185 0 1153 1 0 1 1 0 8 0
vmmpekpl 168 11098 0 11049 3 0 3 3 0 8 0
vmmpepl 168 82536 0 80600 101 3 98 100 0 357 2
vmsppl 488 1184 0 1153 6 1 5 5 0 8 0
rwobjpl 80 25048 0 23943 29 0 29 29 0 8 0
pdppl 4096 2383 0 2309 107 31 76 85 0 8 2
pvpl 32 18367 0 0 149 0 149 149 0 265 0
pmappl 256 1187 0 1153 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 361 0 48 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff838a8ff0) 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_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline]
__sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x1d sys/dev/kcov.c:230
msleep_nsec(ffffffff837e7ad8,ffffffff837e7aa0,4,ffffffff833c51cf,ffffffffffffffff) at msleep_nsec+0xdc sys/kern/kern_synch.c:191
reaper(ffff8000ffffdc90) at reaper+0x15b sys/kern/kern_exit.c:477
end trace frame: 0x0, count: 9
ddb{0}> trace
x86_ipi_db(ffffffff838a8ff0) 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_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x1d kd_curproc sys/dev/kcov.c:580 [inline]
__sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x1d sys/dev/kcov.c:230
msleep_nsec(ffffffff837e7ad8,ffffffff837e7aa0,4,ffffffff833c51cf,ffffffffffffffff) at msleep_nsec+0xdc sys/kern/kern_synch.c:191
reaper(ffff8000ffffdc90) at reaper+0x15b sys/kern/kern_exit.c:477
end trace frame: 0x0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x6f9b8ccaf5a0, count: 14
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x6f9b8ccaf5a0, count: -1