panic: thread 503674 not in SRUN: 4
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
295335 88714 0 0x2000002 0x4000000 1 syz-fuzzer
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198
sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326
mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414
sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414
msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: thread 503674 not in SRUN: 4
ddb{0}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198
sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326
mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414
sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414
msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437
end trace frame: 0x0, count: -7
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000211b9270
rbx 0xffffffff82bfdb9f cpu_info_full_primary+0x2b9f
rdx 0
rcx 0xffff8000211b3a98
rax 0xffffffff82bfcff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x72b44ef0cb91e548
r11 0x943853b19cf9ba97
r12 0xffffffff82bfd9a0 cpu_info_full_primary+0x29a0
r13 0
r14 0
r15 0x1
rip 0xffffffff8138849c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff8000211b9260
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb{0}> show proc
PROC (reaper) pid=328967 stat=sleep
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=4, usrpri=52, nice=20
forw=0x0, list=0xffff8000211b3d40,0xffff8000211b3800
process=0xffff8000ffffee10 user=0xffff8000211b4000, vmspace=0xffffffff82ca7a48
estcpu=2, cpticks=5, pctcpu=0.52
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
34450 251204 89572 32767 3 0x3810 suspend syz-executor.4
34450 503674 89572 32767 4 0x40818b0 syz-executor.4
34450 377464 89572 32767 2 0x4081890 syz-executor.4
88705 153908 1612 32767 3 0x90 nanoslp syz-executor.1
88705 366680 1612 32767 3 0x4000090 ttyin syz-executor.1
88705 391406 1612 32767 3 0x4000090 fsleep syz-executor.1
88705 352277 1612 32767 3 0x4000090 fsleep syz-executor.1
62825 142158 34717 32767 3 0x90 nanoslp syz-executor.0
62825 490809 34717 32767 3 0x4000090 netio syz-executor.0
62825 375575 34717 32767 3 0x4000090 fsleep syz-executor.0
72258 103110 58944 32767 2 0x10 syz-executor.5
72258 387899 58944 32767 3 0x4000090 netio syz-executor.5
70383 130195 99498 32767 3 0x10 biowait syz-executor.7
99498 518257 88714 0 3 0x82 wait syz-executor.7
34717 186443 17321 32767 3 0x90 nanoslp syz-executor.0
17321 215960 88714 0 3 0x82 wait syz-executor.0
34141 373559 37181 32767 3 0x10 biowait syz-executor.2
37181 170339 88714 0 3 0x82 wait syz-executor.2
1612 50210 31106 32767 3 0x90 nanoslp syz-executor.1
31106 450627 88714 0 3 0x82 wait syz-executor.1
68130 504176 11336 32767 2 0x10 syz-executor.6
11336 12894 88714 0 3 0x82 wait syz-executor.6
71107 515336 95655 32767 3 0x90 piperd syz-executor.3
95655 16029 88714 0 3 0x82 wait syz-executor.3
58944 455206 32502 32767 3 0x90 nanoslp syz-executor.5
32502 297842 88714 0 3 0x82 wait syz-executor.5
89572 476451 30424 32767 3 0x90 nanoslp syz-executor.4
30424 157204 88714 0 3 0x82 wait syz-executor.4
90143 268159 0 0 3 0x14200 bored sosplice
88714 84892 75655 0 3 0x2000082 wait syz-fuzzer
88714 60623 75655 0 3 0x6000082 nanoslp syz-fuzzer
88714 381415 75655 0 3 0x6000082 thrsleep syz-fuzzer
88714 169122 75655 0 3 0x6000082 wait syz-fuzzer
88714 161525 75655 0 3 0x6000082 wait syz-fuzzer
88714 354414 75655 0 3 0x6000082 thrsleep syz-fuzzer
88714 515242 75655 0 3 0x6000082 thrsleep syz-fuzzer
88714 437448 75655 0 3 0x6000082 wait syz-fuzzer
88714 295335 75655 0 7 0x6000002 syz-fuzzer
88714 248782 75655 0 3 0x6000082 thrsleep syz-fuzzer
88714 310153 75655 0 3 0x6000082 thrsleep syz-fuzzer
88714 27869 75655 0 3 0x6000082 wait syz-fuzzer
88714 242423 75655 0 3 0x6000082 wait syz-fuzzer
88714 104936 75655 0 3 0x6000082 wait syz-fuzzer
88714 423776 75655 0 3 0x6000082 wait syz-fuzzer
88714 404663 75655 0 2 0x6000002 syz-fuzzer
75655 55546 79128 0 3 0x10008a sigsusp ksh
79128 81720 95824 0 3 0x9a kqread sshd
20153 349256 1 0 3 0x100083 ttyin getty
95824 400918 1 0 3 0x88 kqread sshd
83932 41159 21407 73 3 0x1100090 kqread syslogd
21407 107044 1 0 3 0x100082 netio syslogd
15675 14820 1 0 3 0x100080 kqread resolvd
37292 157914 44467 77 3 0x100092 kqread dhcpleased
79801 435446 44467 77 3 0x100092 kqread dhcpleased
44467 403339 1 0 3 0x80 kqread dhcpleased
95030 980 0 0 3 0x14200 bored smr
24752 239249 0 0 2 0x14200 zerothread
51478 8842 0 0 3 0x14200 aiodoned aiodoned
48181 239863 0 0 3 0x14200 syncer update
75310 129707 0 0 3 0x14200 cleaner cleaner
*96649 328967 0 0 3 0x14200 reaper reaper
21654 115568 0 0 3 0x14200 pgdaemon pagedaemon
76141 2706 0 0 3 0x14200 bored viomb
27350 436147 0 0 3 0x40014200 acpi0 acpi0
24008 443958 0 0 3 0x40014200 idle1
66167 224323 0 0 3 0x14200 bored softnet3
19773 165981 0 0 3 0x14200 bored softnet2
18989 107993 0 0 3 0x14200 bored softnet1
75374 370344 0 0 3 0x14200 bored softnet0
79632 83814 0 0 3 0x14200 bored systqmp
57831 487197 0 0 3 0x14200 bored systq
14636 100471 0 0 3 0x40014200 bored softclock
84249 41355 0 0 3 0x40014200 idle0
1 472294 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive sched_lock &sched_lock r = 0 (0xffffffff82d4ae50)
#0 witness_lock+0x447
#1 sleep_finish+0x142 sys/kern/kern_synch.c:398
#2 msleep+0xea sys/kern/kern_synch.c:249
#3 reaper+0xdb sys/kern/kern_exit.c:437
#4 proc_trampoline+0x1c
Process 70383 (syz-executor.7) thread 0xffff8000211f5558 (130195)
exclusive rrwlock inode r = 0 (0xfffffd8066e413d8)
#0 witness_lock+0x447
#1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vget+0x200 sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314
#8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566
#11 namei+0x55a sys/kern/vfs_lookup.c:250
#12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847
#13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8066e41928)
#0 witness_lock+0x447
#1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418
#6 namei+0x55a sys/kern/vfs_lookup.c:250
#7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847
#8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
#9 Xsyscall+0x128
Process 34141 (syz-executor.2) thread 0xffff8000289c3a98 (373559)
exclusive rrwlock inode r = 0 (0xfffffd807728d3d0)
#0 witness_lock+0x447
#1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vget+0x200 sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314
#8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566
#11 namei+0x55a sys/kern/vfs_lookup.c:250
#12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847
#13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80675d8e70)
#0 witness_lock+0x447
#1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418
#6 namei+0x55a sys/kern/vfs_lookup.c:250
#7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847
#8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10222 6413K 6420K 78643K 11437 0
pcb 13 12K 14K 78643K 17 0
rtable 248 7K 7K 78643K 2680 0
pf 29 8K 8K 78643K 119 0
ifaddr 44 15K 16K 78643K 230 0
ifgroup 50 2K 2K 78643K 230 0
sysctl 3 1K 5K 78643K 73 0
counters 60 35K 35K 78643K 150 0
ioctlops 0 0K 2K 78643K 418 0
iov 0 0K 28K 78643K 3282 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1279 80K 80K 78643K 17973 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 377 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 2888 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 22 81K 117K 78643K 28381 0
sigio 0 0K 0K 78643K 422 0
proc 56 78K 127K 78643K 3402 0
subproc 104 6K 6K 78643K 689 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 1542 0
in_multi 99 7K 7K 78643K 756 0
ether_multi 1 0K 0K 78643K 14 0
mrt 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 271 1208K 1208K 78643K 271 0
exec 0 0K 1K 78643K 3835 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 485 94K 117K 78643K 284145 0
UVM aobj 131 4K 4K 78643K 134 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 666 0
NDP 11 0K 2K 78643K 162 0
temp 74 5920K 6048K 78643K 71715 0
kqueue 12 18K 35K 78643K 3492 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
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 1752 0 1749 21 20 1 3 0 8 0
rtentry 112 653 0 536 4 0 4 4 0 8 0
unpcb 144 15610 0 15595 188 180 8 11 0 8 7
syncache 304 361 0 361 67 66 1 1 0 8 1
sackhl 24 6 0 6 6 6 0 1 0 8 0
tcpqe 32 645 0 645 41 40 1 1 0 8 1
tcpcb 808 15799 0 15771 348 341 7 17 0 8 0
arp 120 116 0 97 1 0 1 1 0 8 0
ipq 40 45 0 43 17 16 1 1 0 8 0
ipqe 40 287 0 285 17 16 1 1 0 8 0
inpcb 368 29730 0 29695 416 403 13 20 0 8 7
nd6 136 198 0 168 5 3 2 2 0 8 0
kcovpl 48 53 0 45 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 2610 0 2138 38 8 30 30 0 8 0
art_table 32 2611 0 2138 4 0 4 4 0 8 0
art_node 16 652 0 545 1 0 1 1 0 8 0
sysvmsgpl 40 6 0 0 1 0 1 1 0 8 0
semapl 112 2886 0 2876 1 0 1 1 0 8 0
shmpl 112 131 0 3 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 49145 0 47690 92 0 92 92 0 8 0
ffsino 272 49145 0 47690 98 0 98 98 0 8 0
nchpl 144 85549 0 83906 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 309890 0 309890 9 8 1 2 0 8 1
percpumem 16 88 0 45 1 0 1 1 0 8 0
kstatmem 264 112 0 90 2 0 2 2 0 8 0
scxspl 216 241909 0 241907 97 94 3 8 1 8 2
plimitpl 152 3851 0 3826 35 34 1 2 0 8 0
sigapl 424 28587 0 28536 7 0 7 7 0 8 0
futexpl 64 223334 0 223329 7 6 1 1 0 8 0
knotepl 120 2226 0 0 17 5 12 17 0 8 0
kqueuepl 216 8451 0 8443 137 136 1 8 0 8 0
pipepl 320 7020 0 6992 185 182 3 13 0 8 0
fdescpl 496 28569 0 28536 7 2 5 6 0 8 0
filepl 152 225296 0 225053 427 410 17 24 0 8 6
lockfpl 104 5368 0 5366 3 2 1 2 0 8 0
lockfspl 48 1567 0 1565 1 0 1 1 0 8 0
sessionpl 144 68 0 52 1 0 1 1 0 8 0
pgrppl 48 550 0 534 1 0 1 1 0 8 0
ucredpl 104 80451 0 80433 1 0 1 1 0 8 0
zombiepl 144 28537 0 28536 1 0 1 1 0 8 0
processpl 1072 28587 0 28536 5 1 4 5 0 8 0
procpl 680 81623 0 81549 64 56 8 9 0 8 1
sosppl 168 1404 0 1402 58 57 1 1 0 8 0
sockpl 488 48485 0 48432 940 921 19 39 0 8 9
mcl64k 65536 71 0 0 6 3 3 3 0 8 0
mcl16k 16384 57 0 0 4 1 3 3 0 8 0
mcl12k 12288 49 0 0 2 0 2 2 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 62 0 0 5 2 3 3 0 8 0
mcl4k 4096 137 0 0 6 3 3 4 0 8 0
mcl2k2 2112 17 0 0 2 0 2 2 0 8 0
mcl2k 2048 614 0 0 32 22 10 32 0 8 0
mtagpl 96 18 0 0 1 0 1 1 0 8 0
mbufpl 256 3018 0 0 89 0 89 89 0 8 0
bufpl 288 52124 0 45796 453 0 453 453 0 8 0
anonpl 24 2849047 0 2837715 260 162 98 109 0 186 0
amapchunkpl 152 903580 0 902719 312 273 39 55 0 158 1
amappl16 200 57261 0 56993 396 372 24 37 0 8 8
amappl15 192 19 0 18 1 0 1 1 0 8 0
amappl14 184 295 0 280 2 1 1 2 0 8 0
amappl13 176 12 0 12 3 3 0 1 0 8 0
amappl12 168 29888 0 29852 2 0 2 2 0 8 0
amappl11 160 58 0 48 1 0 1 1 0 8 0
amappl10 152 109 0 92 1 0 1 1 0 8 0
amappl9 144 407 0 406 1 0 1 1 0 8 0
amappl8 136 1418 0 1188 10 1 9 9 0 8 0
amappl7 128 219 0 202 2 1 1 2 0 8 0
amappl6 120 836 0 811 2 1 1 2 0 8 0
amappl5 112 910 0 901 1 0 1 1 0 8 0
amappl4 104 1483 0 1438 8 6 2 2 0 8 0
amappl3 96 175761 0 175669 47 44 3 4 0 8 0
amappl2 88 30058 0 29977 3 1 2 3 0 8 0
amappl1 80 108608 0 108082 22 10 12 22 0 8 0
amappl 88 282266 0 281999 9 1 8 8 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 72 133 0 3 3 0 3 3 0 8 0
uaddrrnd 24 28569 0 28536 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 28569 0 28536 1 0 1 1 0 8 0
vmmpekpl 168 228788 0 228719 4 0 4 4 0 8 0
vmmpepl 168 1656363 0 1653898 462 335 127 135 0 357 2
vmsppl 464 28568 0 28536 7 2 5 6 0 8 0
rwobjpl 56 410445 0 402916 121 10 111 112 0 8 0
pdppl 4096 57146 0 57072 1172 1090 82 94 0 8 8
pvpl 32 8106405 0 8088612 820 634 186 360 0 265 7
pmappl 248 28568 0 28536 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2839 0 1939 27 0 27 27 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff827904f5) at panic+0x17b sys/kern/subr_prf.c:198
sched_chooseproc() at sched_chooseproc+0x34e sys/kern/kern_sched.c:326
mi_switch() at mi_switch+0x26c sys/kern/sched_bsd.c:414
sleep_finish(0,1) at sleep_finish+0x19b sys/kern/kern_synch.c:414
msleep(ffffffff82d59478,ffffffff82c4a2b0,4,ffffffff8285c87f,0) at msleep+0xea sys/kern/kern_synch.c:249
reaper(ffff8000211b3a98) at reaper+0xdb sys/kern/kern_exit.c:437
end trace frame: 0x0, count: -7
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158
__mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 sys/kern/kern_lock.c:147
sys_sched_yield(ffff8000211f4568,ffff8000212bfb70,ffff8000212bfbc0) at sys_sched_yield+0xc9 sys/kern/kern_synch.c:581
syscall(ffff8000212bfc40) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff8000212bfc40) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x22c221330, count: 7
ddb{1}> trace
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158
__mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82d4ac48) at __mp_lock+0x133 sys/kern/kern_lock.c:147
sys_sched_yield(ffff8000211f4568,ffff8000212bfb70,ffff8000212bfbc0) at sys_sched_yield+0xc9 sys/kern/kern_synch.c:581
syscall(ffff8000212bfc40) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff8000212bfc40) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x22c221330, count: -8