uvm_fault(0xffffffff835d6048, 0xffffffff81b5ec21, 0, 2) -> e
kernel: page fault trap, code=3
Stopped at softclock+0xf7: movq %rcx,0x8(%rax)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*168745 97026 73 0x1100010 0 0 syslogd
243889 71475 0 0x14000 0x200 1K update
softclock(0) at softclock+0xf7 sys/kern/kern_timeout.c:748
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
syscall(ffff80002a06acc0) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:207 [inline]
syscall(ffff80002a06acc0) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7b77aba334c0, 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: uvm_fault(0xffffffff835d6048, 0xffffffff81b5ec21, 0, 2) -> e
ddb{0}> trace
softclock(0) at softclock+0xf7 sys/kern/kern_timeout.c:748
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
syscall(ffff80002a06acc0) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:207 [inline]
syscall(ffff80002a06acc0) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7b77aba334c0, count: -7
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a06aa80
rbx 0xffffffff835279e0 timeout_todo
rdx 0
rcx 0xffffffff835279e0 timeout_todo
rax 0xffffffff81b5ec19 splassert_check+0x99
r8 0
r9 0
r10 0xa28dea20097e88cd
r11 0x45772791d809cbeb
r12 0xffffffff
r13 0xffffffff83531e10 rdrand_tmo
r14 0
r15 0xfffffd80669d1f00
rip 0xffffffff81f030c7 softclock+0xf7
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002a06aa40
ss 0x10
softclock+0xf7: movq %rcx,0x8(%rax)
ddb{0}> show proc
PROC (syslogd) tid=168745 pid=97026 tcnt=1 stat=onproc
flags process=1100010<SUGID,PLEDGE,CHROOT> proc=0
runpri=17, usrpri=56, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffffcf40,0xffff8000ffffd6e8
process=0xffff8000ffffa8d8 user=0xffff80002a065000, vmspace=0xfffffd806ed0aa58
estcpu=6, cpticks=0, pctcpu=12.26, user=40, sys=11901, intr=4014
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
78807 292809 33719 0 3 0x82 wait syz-executor
63147 138028 33719 0 3 0x82 wait syz-executor
21356 302657 33719 0 3 0x82 wait syz-executor
79247 323551 33719 0 3 0x82 wait syz-executor
19543 499409 33719 0 3 0x82 wait syz-executor
9066 291828 33719 0 3 0x82 wait syz-executor
26505 335725 33719 0 3 0x82 wait syz-executor
14576 401263 0 0 3 0x14200 acct acct
49294 507652 1 0 3 0x100083 ttyin getty
17173 314599 0 0 3 0x14200 bored sosplice
33719 89105 38908 0 3 0x82 wait syz-executor
38908 392216 87260 0 3 0x10008a sigsusp ksh
87260 16448 74364 0 3 0x98 kqread sshd-session
74364 85755 43850 0 3 0x92 kqread sshd-session
43850 207556 1 0 3 0x88 kqread sshd
17205 475901 61614 74 3 0x1100092 bpf pflogd
61614 84748 1 0 3 0x80 sbwait pflogd
*97026 168745 77078 73 7 0x1100010 syslogd
77078 189489 1 0 3 0x100082 sbwait syslogd
11750 378457 1 0 3 0x100080 kqread resolvd
50071 416724 42452 77 3 0x100092 kqread dhcpleased
2185 312895 42452 77 3 0x100092 kqread dhcpleased
42452 46673 1 0 3 0x80 kqread dhcpleased
98125 456976 0 0 2 0x14200 smr
59557 173039 0 0 3 0x14200 pgzero zerothread
59761 76232 0 0 3 0x14200 aiodoned aiodoned
71475 243889 0 0 7 0x14200 update
92792 440657 0 0 3 0x14200 cleaner cleaner
21027 296293 0 0 2 0x14200 reaper
88559 126868 0 0 3 0x14200 pgdaemon pagedaemon
56386 207324 0 0 3 0x14200 bored viomb
43429 223517 0 0 3 0x40014200 acpi0 acpi0
42797 493165 0 0 3 0x40014200 idle1
9442 36204 0 0 3 0x14200 bored softnet3
13338 231468 0 0 3 0x14200 bored softnet2
19392 398591 0 0 3 0x14200 bored softnet1
59085 16441 0 0 3 0x14200 bored softnet0
29662 456182 0 0 2 0x14200 systqmp
83323 377087 0 0 3 0x14200 bored systq
52377 514834 0 0 3 0x14200 tmoslp softclockmp
10434 180540 0 0 3 0x40014200 tmoslp softclock
32259 159476 0 0 3 0x40014200 idle0
1 450243 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/kern/kern_timeout.c:57 r = 0 (0xffffffff83486170)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 softclock_process_tick_timeout+0x224 sys/kern/kern_timeout.c:720
#4 softclock+0x16b sys/kern/kern_timeout.c:752
#5 softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
#6 Xsoftclock+0x27
#7 __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
#7 __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
#8 __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
#8 __mp_lock+0x1a3 sys/kern/kern_lock.c:144
#9 syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:207 [inline]
#9 syscall+0xa11 sys/arch/amd64/amd64/trap.c:598
#10 Xsyscall+0x128
CPU 1:
exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8007463638)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_remove_ptes+0x297 sys/arch/amd64/amd64/pmap.c:1706
#4 pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1915
#5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
#6 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
#7 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#8 reaper+0x246 sys/kern/kern_exit.c:481
#9 proc_trampoline+0x10
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806be8bac8)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:432 [inline]
#3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1819
#4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
#5 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
#6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#7 reaper+0x246 sys/kern/kern_exit.c:481
#8 proc_trampoline+0x10
Process 97026 (syslogd) thread 0xffff8000ffffd450 (168745)
Process 21027 (reaper) thread 0xffff800029fd91c0 (296293)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10235 10145K 10748K 166960K 15617 0
pcb 17 22K 26K 166960K 636 0
rtable 229 18K 19K 166960K 7356 0
pf 45 19K 26K 166960K 801 0
ifaddr 47 9K 9K 166960K 953 0
ifgroup 68 2K 2K 166960K 1005 0
sysctl 4 1K 1K 166960K 10 0
counters 70 37K 37K 166960K 550 0
ioctlops 0 0K 4K 166960K 2280 0
iov 0 0K 32K 166960K 238 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1626 102K 102K 166960K 7316 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 53 0
VM map 2 1K 1K 166960K 2 0
sem 16 11K 11K 166960K 92 0
dirhash 18 3K 3K 166960K 66 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 10 33K 89K 166960K 6410 0
sigio 0 0K 0K 166960K 85 0
proc 71 91K 128K 166960K 6837 0
subproc 104 6K 7K 166960K 2927 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 571 0
in_multi 90 6K 7K 166960K 2530 0
ether_multi 1 0K 0K 166960K 23 0
mrt 1 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 241 1076K 1076K 166960K 241 0
exec 0 0K 1K 166960K 3818 0
pfkey data 0 0K 0K 166960K 5 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 258 91K 109K 166960K 47986 0
UVM aobj 121 7K 7K 166960K 133 0
pinsyscall 35 70K 103K 166960K 13147 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 208 0
NDP 15 0K 1K 166960K 704 0
temp 75 6824K 6952K 166960K 199650 0
kqueue 13 20K 32K 166960K 477 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 827 0 824 5 4 1 3 0 8 0
rtentry 112 2598 0 2504 5 2 3 4 0 8 0
unpcb 144 3887 0 3870 46 45 1 7 0 8 0
syncache 336 3 0 3 1 1 0 1 0 8 0
tcpcb 808 1721 0 1717 62 61 1 8 0 8 0
arp 120 477 0 459 1 0 1 1 0 8 0
inpcb 336 5550 0 5541 110 108 2 18 0 8 0
nd6 136 702 0 678 1 0 1 1 0 8 0
pkpcb 40 23 0 23 12 12 0 1 0 8 0
kcovpl 48 225 0 217 1 0 1 1 0 8 0
ppxss 1168 15 0 15 12 12 0 1 0 8 0
pfstscr 40 9 0 7 1 0 1 1 0 8 0
pffrag 232 63 0 60 5 4 1 1 0 482 0
pffrnode 88 26 0 23 5 4 1 1 0 8 0
pffrent 40 202 0 199 5 4 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 18 0 11 1 0 1 1 0 8 0
pfanchor 1288 7 0 1 1 0 1 1 0 8 0
pftag 88 4 0 2 1 0 1 1 0 8 0
pfstitem 24 491 0 449 1 0 1 1 0 8 0
pfstkey 128 510 0 464 3 0 3 3 0 8 0
pfstate 376 494 0 457 12 6 6 7 0 8 0
pfrule 1344 87 0 74 3 1 2 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 10196 0 9808 53 28 25 29 0 8 0
art_table 32 10198 0 9808 6 2 4 4 0 8 0
art_node 16 2587 0 2503 1 0 1 1 0 8 0
sysvmsgpl 40 14 0 9 3 2 1 1 0 8 0
semupl 112 2 0 2 2 2 0 1 0 8 0
semapl 112 88 0 74 1 0 1 1 0 8 0
shmpl 112 130 0 12 4 0 4 4 0 8 0
dirhash 1024 54 0 32 4 0 4 4 0 8 0
dino2pl 256 7688 0 5734 123 0 123 123 0 8 0
ffsino 272 7688 0 5734 131 0 131 131 0 8 0
nchpl 144 12510 0 11654 74 41 33 69 0 8 0
uvmvnodes 80 9676 0 0 198 0 198 198 0 8 0
vnodes 216 9676 0 0 538 0 538 538 0 8 0
namei 1024 64174 0 64174 19 19 0 1 0 8 0
percpumem 16 289 0 240 1 0 1 1 0 8 0
pfiaddrpl 120 70 0 68 2 1 1 1 0 8 0
kstatmem 264 510 0 480 6 3 3 3 0 8 0
scsiplug 72 9 0 9 8 8 0 1 0 8 0
scxspl 216 151185 0 151170 22 21 1 8 1 8 0
plimitpl 152 1053 0 1034 1 0 1 1 0 8 0
sigapl 424 6294 0 6242 15 8 7 7 0 8 0
futexpl 64 50820 0 50820 22 21 1 1 0 8 1
knotepl 120 947 0 0 20 2 18 19 0 8 0
kqueuepl 216 1239 0 1230 22 21 1 5 0 8 0
pipepl 320 1095 0 1068 8 5 3 6 0 8 0
fdescpl 496 6271 0 6247 17 12 5 5 0 8 0
filepl 152 34963 0 34725 108 97 11 19 0 8 0
lockfpl 104 1538 0 1536 4 3 1 2 0 8 0
lockfspl 48 516 0 514 1 0 1 1 0 8 0
sessionpl 144 241 0 232 1 0 1 1 0 8 0
pgrppl 48 507 0 490 1 0 1 1 0 8 0
ucredpl 104 5169 0 5154 1 0 1 1 0 8 0
zombiepl 144 6251 0 6242 2 1 1 1 0 8 0
processpl 1160 6294 0 6242 5 1 4 5 0 8 0
procpl 648 11525 0 11463 8 2 6 7 0 8 0
srpgc 96 37 0 37 13 13 0 1 0 8 0
sosppl 168 17 0 17 8 8 0 1 0 8 0
sockpl 664 10331 0 10302 141 137 4 23 0 8 0
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 11 0 0 2 0 2 2 0 8 0
mcl4k 4096 4 0 0 1 0 1 1 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 386 0 0 31 2 29 31 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 4708 0 0 280 0 280 280 0 8 0
bufpl 280 19868 0 9536 739 0 739 739 0 8 0
anonpl 24 754085 0 746252 261 207 54 83 0 185 0
amapchunkpl 152 152579 0 151811 142 110 32 43 0 158 0
amappl16 200 8482 0 8458 143 130 13 18 0 8 2
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 582 0 570 1 0 1 1 0 8 0
amappl13 176 6 0 6 2 2 0 1 0 8 0
amappl12 168 10350 0 10319 3 1 2 2 0 8 0
amappl11 160 51 0 37 1 0 1 1 0 8 0
amappl10 152 5 0 4 2 1 1 1 0 8 0
amappl9 144 230 0 230 2 2 0 1 0 8 0
amappl8 136 19 0 15 1 0 1 1 0 8 0
amappl7 128 537 0 525 1 0 1 1 0 8 0
amappl6 120 2328 0 2326 1 0 1 1 0 8 0
amappl5 112 999 0 987 1 0 1 1 0 8 0
amappl4 104 977 0 955 1 0 1 1 0 8 0
amappl3 96 26161 0 26049 6 2 4 4 0 8 0
amappl2 88 6937 0 6856 2 0 2 2 0 8 0
amappl1 80 39835 0 39247 17 4 13 14 0 8 0
amappl 88 45830 0 45635 5 0 5 5 0 92 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma2048 2048 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 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 128 256 0 256 4 4 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 20 0 19 1 0 1 1 0 8 0
aobjpl 72 132 0 12 3 0 3 3 0 8 0
uaddrrnd 24 6271 0 6240 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 6271 0 6240 1 0 1 1 0 8 0
vmmpekpl 168 50949 0 50899 3 0 3 3 0 8 0
vmmpepl 168 376121 0 374152 198 101 97 99 0 357 0
vmsppl 440 6270 0 6239 6 2 4 5 0 8 0
rwobjpl 56 105837 0 95062 166 11 155 155 0 8 0
pdppl 4096 12549 0 12478 399 327 72 83 0 8 1
pvpl 32 45879 0 0 368 3 365 365 0 265 0
pmappl 248 6270 0 6239 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1238 0 563 20 0 20 20 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
softclock(0) at softclock+0xf7 sys/kern/kern_timeout.c:748
softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:590 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:158
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835d9258) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
syscall(ffff80002a06acc0) at syscall+0xa11 mi_syscall_return sys/sys/syscall_mi.h:207 [inline]
syscall(ffff80002a06acc0) at syscall+0xa11 sys/arch/amd64/amd64/trap.c:598
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7b77aba334c0, count: -7
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) 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
__sanitizer_cov_trace_cmp8(1fa620,1fa4e0) at __sanitizer_cov_trace_cmp8+0x3a sys/dev/kcov.c:218
buf_rb_bufs_RBT_COMPARE(ffff800029ff6d20,fffffd806f88a358) at buf_rb_bufs_RBT_COMPARE+0x5d rb_buf_compare sys/kern/vfs_subr.c:136 [inline]
buf_rb_bufs_RBT_COMPARE(ffff800029ff6d20,fffffd806f88a358) at buf_rb_bufs_RBT_COMPARE+0x5d sys/kern/vfs_subr.c:131
_rb_find(ffffffff83308e58,fffffd807ec293c8,ffff800029ff6d20) at _rb_find+0x68 sys/kern/subr_tree.c:450
getblk(fffffd807ec29360,1fa620,4000,0,ffffffffffffffff) at getblk+0xa7
bread(fffffd807ec29360,1fa620,4000,ffff800029ff6f48) at bread+0x47 bio_doread sys/kern/vfs_bio.c:430 [inline]
bread(fffffd807ec29360,1fa620,4000,ffff800029ff6f48) at bread+0x47 sys/kern/vfs_bio.c:475
ffs_update(fffffd806bbcc000,0) at ffs_update+0x198 sys/ufs/ffs/ffs_inode.c:91
VOP_FSYNC(fffffd80741af298,fffffd807f7d3dd0,3,ffff800029fd8518) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311
syncer_thread(ffff800029fd8518) at syncer_thread+0x27c sys/kern/vfs_sync.c:161
end trace frame: 0x0, count: 4
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) 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
__sanitizer_cov_trace_cmp8(1fa620,1fa4e0) at __sanitizer_cov_trace_cmp8+0x3a sys/dev/kcov.c:218
buf_rb_bufs_RBT_COMPARE(ffff800029ff6d20,fffffd806f88a358) at buf_rb_bufs_RBT_COMPARE+0x5d rb_buf_compare sys/kern/vfs_subr.c:136 [inline]
buf_rb_bufs_RBT_COMPARE(ffff800029ff6d20,fffffd806f88a358) at buf_rb_bufs_RBT_COMPARE+0x5d sys/kern/vfs_subr.c:131
_rb_find(ffffffff83308e58,fffffd807ec293c8,ffff800029ff6d20) at _rb_find+0x68 sys/kern/subr_tree.c:450
getblk(fffffd807ec29360,1fa620,4000,0,ffffffffffffffff) at getblk+0xa7
bread(fffffd807ec29360,1fa620,4000,ffff800029ff6f48) at bread+0x47 bio_doread sys/kern/vfs_bio.c:430 [inline]
bread(fffffd807ec29360,1fa620,4000,ffff800029ff6f48) at bread+0x47 sys/kern/vfs_bio.c:475
ffs_update(fffffd806bbcc000,0) at ffs_update+0x198 sys/ufs/ffs/ffs_inode.c:91
VOP_FSYNC(fffffd80741af298,fffffd807f7d3dd0,3,ffff800029fd8518) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311
syncer_thread(ffff800029fd8518) at syncer_thread+0x27c sys/kern/vfs_sync.c:161
end trace frame: 0x0, count: -11