panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg, TRUE)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1249
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
523212 63577 73 0x1100010 0 1K syslogd
*323470 88960 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249
uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834
uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481
end trace frame: 0x0, count: 6
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: kernel diagnostic assertion "uvm_page_owner_locked_p(pg, TRUE)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1249
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249
uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834
uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481
end trace frame: 0x0, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a23fd20
rbx 0xffffffff83821dcf cpu_info_full_primary+0x2dcf
rdx 0
rcx 0xffff8000ffffd1f8
rax 0xffffffff83820ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x6b0242fb8b819004
r11 0x7028122b3b9f7340
r12 0xffffffff83821bd0 cpu_info_full_primary+0x2bd0
r13 0
r14 0
r15 0x1
rip 0xffffffff832db845 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a23fd10
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (reaper) tid=323470 pid=88960 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=86, usrpri=86, slppri=4, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffffd718,0xffff8000ffffcce8
process=0xffff8000ffff6110 user=0xffff80002a23b000, vmspace=0xffffffff839ba7e0
estcpu=36, cpticks=49, pctcpu=15.38, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
73491 90910 0 0 3 0x14200 bored sosplice
89995 336966 52506 0 3 0x100082 sbwait arp
52506 334480 35198 0 3 0x10008a sigsusp sh
39157 440066 11576 0 3 0x82 wait syz-executor
72924 377915 11576 0 3 0x82 wait syz-executor
35198 100938 11576 0 3 0x82 wait syz-executor
1428 136199 11576 0 3 0x82 wait syz-executor
96874 460086 11576 0 3 0x82 wait syz-executor
19585 420809 11576 0 3 0x82 wait syz-executor
21127 270668 11576 0 3 0x82 wait syz-executor
11576 330858 12366 0 3 0x82 wait syz-executor
12366 364148 67147 0 3 0x10008a sigsusp ksh
67147 222023 75854 0 3 0x98 kqread sshd-session
75854 197982 12759 0 3 0x92 kqread sshd-session
86372 288301 1 0 3 0x100083 ttyin getty
12759 419062 1 0 3 0x88 kqread sshd
86120 123767 9519 74 3 0x1100092 bpf pflogd
9519 475339 1 0 3 0x80 sbwait pflogd
63577 523212 77396 73 7 0x1100010 syslogd
77396 25457 1 0 3 0x100082 sbwait syslogd
39584 158359 1 0 3 0x100080 kqread resolvd
81910 332947 64950 77 3 0x100092 kqread dhcpleased
416 231566 64950 77 3 0x100092 kqread dhcpleased
64950 160194 1 0 3 0x80 kqread dhcpleased
29113 37672 0 0 3 0x14200 bored smr
32724 466191 0 0 3 0x14200 pgzero zerothread
73412 13930 0 0 3 0x14200 aiodoned aiodoned
67520 413629 0 0 3 0x14200 syncer update
85958 330350 0 0 3 0x14200 cleaner cleaner
*88960 323470 0 0 7 0x14200 reaper
41904 405195 0 0 3 0x14200 pgdaemon pagedaemon
73981 17372 0 0 3 0x14200 bored viomb
34871 319981 0 0 3 0x40014200 acpi0 acpi0
52554 259759 0 0 3 0x40014200 idle1
9773 26417 0 0 3 0x14200 bored softnet3
3554 155784 0 0 3 0x14200 bored softnet2
5814 242420 0 0 3 0x14200 bored softnet1
61668 296563 0 0 3 0x14200 bored softnet0
15625 392019 0 0 3 0x14200 bored systqmp
12379 22035 0 0 3 0x14200 bored systq
81439 305526 0 0 3 0x14200 tmoslp softclockmp
36941 103897 0 0 3 0x40014200 tmoslp softclock
52604 454233 0 0 3 0x40014200 idle0
1 247602 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8397d1c8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1833
#4 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
#5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
#6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
#7 reaper+0x22d sys/kern/kern_exit.c:481
#8 proc_trampoline+0x10
Process 88960 (reaper) thread 0xffff8000ffffd1f8 (323470)
exclusive rwlock uobjlk r = 0 (0xfffffd806bed7228)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 uvm_fault_unwire_locked+0x25d sys/uvm/uvm_fault.c:1818
#3 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
#4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
#5 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
#6 reaper+0x22d sys/kern/kern_exit.c:481
#7 proc_trampoline+0x10
exclusive rwlock vmmaplk r = 0 (0xfffffd806bd25a80)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250
#3 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2480
#4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
#5 reaper+0x22d sys/kern/kern_exit.c:481
#6 proc_trampoline+0x10
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8397d1c8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1833
#4 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
#5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
#6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
#7 reaper+0x22d sys/kern/kern_exit.c:481
#8 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10189 11019K 11215K 166960K 11316 0
pcb 17 12K 12K 166960K 29 0
rtable 196 5K 6K 166960K 327 0
pf 32 17K 18K 166960K 45 0
ifaddr 37 6K 7K 166960K 43 0
ifgroup 51 2K 2K 166960K 55 0
sysctl 3 1K 9K 166960K 7 0
counters 64 36K 36K 166960K 66 0
ioctlops 0 0K 4K 166960K 1486 0
iov 0 0K 16K 166960K 5 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1339 84K 84K 166960K 1377 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 4 0
VM map 2 1K 1K 166960K 2 0
sem 2 0K 0K 166960K 2 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 11 37K 93K 166960K 176 0
proc 71 91K 127K 166960K 527 0
subproc 63 3K 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 5 0
in_multi 78 5K 6K 166960K 90 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 43 201K 201K 166960K 43 0
exec 0 0K 1K 166960K 366 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 257 156K 160K 166960K 3284 0
UVM aobj 3 2K 2K 166960K 3 0
pinsyscall 37 74K 103K 166960K 1245 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 1 0
NDP 11 0K 1K 166960K 26 0
temp 34 8662K 8734K 166960K 14892 0
kqueue 13 20K 32K 166960K 35 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 35 0 31 1 0 1 1 0 8 0
rtentry 176 103 0 12 5 0 5 5 0 8 0
unpcb 144 60 0 43 1 0 1 1 0 8 0
syncache 336 3 0 3 1 1 0 1 0 8 0
tcpcb 808 18 0 14 1 0 1 1 0 8 0
arp 128 17 0 2 1 0 1 1 0 8 0
inpcb 384 99 0 92 2 1 1 2 0 8 0
nd6 144 21 0 3 1 0 1 1 0 8 0
kcovpl 48 8 0 1 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
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 24 0 16 1 0 1 1 0 8 0
pfstkey 128 24 0 16 1 0 1 1 0 8 0
pfstate 384 24 0 16 3 0 3 3 0 8 1
pfrule 1344 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 256 412 0 44 26 0 26 26 0 8 2
art_table 32 413 0 44 4 0 4 4 0 8 0
art_node 16 102 0 19 1 0 1 1 0 8 0
sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1624 0 110 95 0 95 95 0 8 0
ffsino 288 1624 0 110 109 0 109 109 0 8 0
nchpl 144 1883 0 190 63 0 63 63 0 8 0
uvmvnodes 80 1727 0 0 36 0 36 36 0 8 0
vnodes 216 1727 0 0 96 0 96 96 0 8 0
namei 1024 5707 0 5707 2 2 0 2 0 8 0
percpumem 16 48 0 1 1 0 1 1 0 8 0
kstatmem 264 26 0 2 2 0 2 2 0 8 0
scxspl 216 10488 0 10487 10 8 2 8 1 8 1
plimitpl 152 30 0 12 1 0 1 1 0 8 0
sigapl 424 475 0 423 7 0 7 7 0 8 0
knotepl 120 542 0 0 17 0 17 17 0 8 0
kqueuepl 224 98 0 89 5 4 1 5 0 8 0
pipepl 336 105 0 78 3 0 3 3 0 8 0
fdescpl 520 456 0 431 3 0 3 3 0 8 0
filepl 160 1816 0 1620 12 3 9 12 0 8 0
lockfpl 104 30 0 28 1 0 1 1 0 8 0
lockfspl 48 11 0 9 1 0 1 1 0 8 0
sessionpl 144 22 0 13 1 0 1 1 0 8 0
pgrppl 48 34 0 17 1 0 1 1 0 8 0
ucredpl 104 83 0 69 1 0 1 1 0 8 0
zombiepl 144 431 0 423 1 0 1 1 0 8 0
processpl 1208 475 0 423 5 0 5 5 0 8 0
procpl 656 555 0 488 6 0 6 6 0 8 0
sosppl 168 2 0 2 1 1 0 1 0 8 0
sockpl 728 195 0 167 4 1 3 4 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 115 0 0 15 0 15 15 0 8 0
mcl2k 2048 35 0 0 5 0 5 5 0 8 0
mtagpl 96 4 0 0 1 0 1 1 0 8 0
mbufpl 256 190 0 0 12 0 12 12 0 8 0
bufpl 280 5053 0 119 353 0 353 353 0 8 0
anonpl 32 10469 0 0 85 0 85 85 0 246 0
amapchunkpl 152 9855 0 9042 36 4 32 36 0 158 0
amappl16 200 2012 0 1988 5 3 2 5 0 8 0
amappl15 192 10 0 9 1 0 1 1 0 8 0
amappl14 184 122 0 109 1 0 1 1 0 8 0
amappl13 176 6 0 6 1 1 0 1 0 8 0
amappl12 168 1097 0 1063 3 1 2 2 0 8 0
amappl11 160 51 0 37 1 0 1 1 0 8 0
amappl10 152 2 0 2 1 1 0 1 0 8 0
amappl9 144 246 0 246 1 1 0 1 0 8 0
amappl8 136 23 0 21 1 0 1 1 0 8 0
amappl7 128 107 0 94 1 0 1 1 0 8 0
amappl6 120 170 0 166 1 0 1 1 0 8 0
amappl5 112 142 0 132 1 0 1 1 0 8 0
amappl4 104 310 0 290 1 0 1 1 0 8 0
amappl3 96 1548 0 1424 4 0 4 4 0 8 0
amappl2 88 619 0 555 2 0 2 2 0 8 0
amappl1 80 8337 0 7696 15 1 14 15 0 8 0
amappl 88 2613 0 2432 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 72 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 456 0 423 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 456 0 423 1 0 1 1 0 8 0
vmmpekpl 168 5446 0 5403 2 0 2 2 0 8 0
vmmpepl 168 35715 0 33657 91 1 90 91 0 357 0
vmsppl 480 455 0 423 5 0 5 5 0 8 0
rwobjpl 72 14499 0 11781 50 0 50 50 0 8 0
pdppl 4096 920 0 846 100 26 74 86 0 8 0
pvpl 32 32110 0 0 259 0 259 259 0 265 0
pmappl 256 455 0 423 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 380 0 31 11 0 11 11 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249
uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834
uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420
reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481
end trace frame: 0x0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299ddff0) 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_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
_kernel_lock_held() at _kernel_lock_held+0x20 sys/kern/kern_lock.c:76
tsleep(fffffd806e26b790,11,ffffffff8341499b,0) at tsleep+0xcf sys/kern/kern_synch.c:124
vwaitforio(fffffd806e26b710,0,ffffffff8341499b,ffffffffffffffff) at vwaitforio+0xd2 sys/kern/vfs_subr.c:-1
ffs_fsync(ffff80002a2c68d0) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482
VOP_FSYNC(fffffd806e26b710,fffffd807f7d3b60,1,ffff8000ffff3720) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311
sys_fsync(ffff8000ffff3720,ffff80002a2c6a80,ffff80002a2c69d0) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2936
syscall(ffff80002a2c6a80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2c6a80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71137c01f1a0, count: 3
ddb{1}> trace
x86_ipi_db(ffff8000299ddff0) 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_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
_kernel_lock_held() at _kernel_lock_held+0x20 sys/kern/kern_lock.c:76
tsleep(fffffd806e26b790,11,ffffffff8341499b,0) at tsleep+0xcf sys/kern/kern_synch.c:124
vwaitforio(fffffd806e26b710,0,ffffffff8341499b,ffffffffffffffff) at vwaitforio+0xd2 sys/kern/vfs_subr.c:-1
ffs_fsync(ffff80002a2c68d0) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482
VOP_FSYNC(fffffd806e26b710,fffffd807f7d3b60,1,ffff8000ffff3720) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311
sys_fsync(ffff8000ffff3720,ffff80002a2c6a80,ffff80002a2c69d0) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2936
syscall(ffff80002a2c6a80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2c6a80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71137c01f1a0, count: -12