panic: kernel diagnostic assertion "to->to_kclock == KCLOCK_UPTIME" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_timeout.c", line 500
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*237861 89738 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82722f34) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff827a0c78,ffffffff8275cfb6,1f4,ffffffff82774c92) at __assert+0x25 sys/kern/subr_prf.c:157
timeout_bucket(fffffd8077683f08) at timeout_bucket+0x1e4 sys/kern/kern_timeout.c:503
softclock_process_kclock_timeout(fffffd8077683f08,0) at softclock_process_kclock_timeout+0xe5 sys/kern/kern_timeout.c:656
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
Xspllower() at Xspllower+0x19
printf(ffffffff827048df) at printf+0x84 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807e691568,e0fceb75000,e0fced74000) at uvm_fault_unwire_locked+0x20c sys/uvm/uvm_fault.c:1679
uvm_unmap_kill_entry_withlock(fffffd807e691568,fffffd8069b66d90,0) at uvm_unmap_kill_entry_withlock+0x62 sys/uvm/uvm_map.c:1924
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 sys/uvm/uvm_map.c:2578
uvmspace_free(fffffd807e691568) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3516
end trace frame: 0xffff8000216407c0, 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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kernel diagnostic assertion "to->to_kclock == KCLOCK_UPTIME" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_timeout.c", line 500
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82722f34) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff827a0c78,ffffffff8275cfb6,1f4,ffffffff82774c92) at __assert+0x25 sys/kern/subr_prf.c:157
timeout_bucket(fffffd8077683f08) at timeout_bucket+0x1e4 sys/kern/kern_timeout.c:503
softclock_process_kclock_timeout(fffffd8077683f08,0) at softclock_process_kclock_timeout+0xe5 sys/kern/kern_timeout.c:656
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
Xspllower() at Xspllower+0x19
printf(ffffffff827048df) at printf+0x84 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807e691568,e0fceb75000,e0fced74000) at uvm_fault_unwire_locked+0x20c sys/uvm/uvm_fault.c:1679
uvm_unmap_kill_entry_withlock(fffffd807e691568,fffffd8069b66d90,0) at uvm_unmap_kill_entry_withlock+0x62 sys/uvm/uvm_map.c:1924
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 sys/uvm/uvm_map.c:2578
uvmspace_free(fffffd807e691568) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3516
reaper(ffff8000ffff8ae8) at reaper+0x15d sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800021640250
rbx 0
rdx 0
rcx 0
rax 0xffff8000ffff8ae8
r8 0x101010101010101
r9 0x8080808080808080
r10 0x28609f84fed8887c
r11 0x57f2d2e9ede24afa
r12 0
r13 0xbb49681ce8037584
r14 0
r15 0x1
rip 0xffffffff81a69eb8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021640240
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (reaper) pid=237861 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff9058,0xffff8000ffff8840
process=0xffff8000ffffabd8 user=0xffff80002163b000, vmspace=0xffffffff82c0a9b0
estcpu=36, cpticks=24, pctcpu=19.8
user=0, sys=4, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
79898 188440 12425 0 3 0x82 wait syz-executor.7
56046 193274 12425 0 3 0x82 piperd syz-executor.5
51206 402279 12425 0 3 0x82 piperd syz-executor.0
88385 438905 12425 0 3 0x82 piperd syz-executor.6
40440 58800 12425 0 3 0x82 piperd syz-executor.4
11410 398832 12425 0 3 0x82 piperd syz-executor.1
43852 273328 12425 0 3 0x82 piperd syz-executor.2
84093 455563 1 0 3 0x100083 ttyin getty
79568 446262 0 0 3 0x14280 nfsidl nfsio
97093 38814 0 0 3 0x14280 nfsidl nfsio
19972 489208 0 0 3 0x14280 nfsidl nfsio
81985 52582 0 0 3 0x14280 nfsidl nfsio
79060 401519 0 0 3 0x14280 nfsidl nfsio
60862 324311 0 0 3 0x14280 nfsidl nfsio
46997 444411 0 0 3 0x14280 nfsidl nfsio
36600 359102 0 0 3 0x14280 nfsidl nfsio
75303 308849 0 0 3 0x14280 nfsidl nfsio
96441 37722 0 0 3 0x14280 nfsidl nfsio
12236 145564 0 0 3 0x14280 nfsidl nfsio
87705 389718 0 0 3 0x14280 nfsidl nfsio
40846 487707 0 0 3 0x14280 nfsidl nfsio
4317 78919 0 0 3 0x14280 nfsidl nfsio
98881 457310 0 0 3 0x14280 nfsidl nfsio
52324 290081 0 0 3 0x14280 nfsidl nfsio
63369 489227 0 0 3 0x14280 nfsidl nfsio
51340 57020 0 0 3 0x14280 nfsidl nfsio
69397 279617 0 0 3 0x14280 nfsidl nfsio
12018 249622 0 0 3 0x14280 nfsidl nfsio
95693 26575 12425 0 3 0x82 piperd syz-executor.3
70537 39383 0 0 3 0x14200 bored sosplice
12425 414632 13275 0 3 0x82 wait syz-fuzzer
12425 366088 13275 0 2 0x4000482 syz-fuzzer
12425 140442 13275 0 3 0x4000082 thrsleep syz-fuzzer
12425 306784 13275 0 3 0x4000082 wait syz-fuzzer
12425 413847 13275 0 3 0x4000082 wait syz-fuzzer
12425 487618 13275 0 3 0x4000082 wait syz-fuzzer
12425 521492 13275 0 3 0x4000082 thrsleep syz-fuzzer
12425 41962 13275 0 3 0x4000082 wait syz-fuzzer
12425 440391 13275 0 3 0x4000082 kqread syz-fuzzer
12425 509086 13275 0 3 0x4000082 thrsleep syz-fuzzer
12425 302886 13275 0 3 0x4000082 thrsleep syz-fuzzer
12425 233168 13275 0 3 0x4000082 wait syz-fuzzer
12425 142175 13275 0 3 0x4000082 wait syz-fuzzer
12425 96416 13275 0 3 0x4000082 wait syz-fuzzer
13275 413112 56342 0 3 0x10008a sigsusp ksh
56342 225100 84946 0 3 0x9a kqread sshd
84946 108324 1 0 3 0x88 kqread sshd
300 218272 24358 73 2 0x1100010 syslogd
24358 411302 1 0 3 0x100082 netio syslogd
67098 124701 1 0 3 0x100080 kqread resolvd
96318 478105 76217 77 3 0x100092 kqread dhcpleased
96459 16442 76217 77 3 0x100092 kqread dhcpleased
76217 432632 1 0 3 0x80 kqread dhcpleased
29272 283650 0 0 3 0x14200 bored smr
78715 453027 0 0 2 0x14200 zerothread
36227 370247 0 0 3 0x14200 aiodoned aiodoned
43912 229087 0 0 3 0x14200 syncer update
49249 323415 0 0 3 0x14200 cleaner cleaner
*89738 237861 0 0 7 0x14200 reaper
93423 374847 0 0 3 0x14200 pgdaemon pagedaemon
14083 431314 0 0 3 0x14200 bored viomb
84305 193321 0 0 3 0x40014200 acpi0 acpi0
71475 447770 0 0 3 0x14200 bored softnet
57219 184122 0 0 3 0x14200 bored softnet
52459 71913 0 0 3 0x14200 bored softnet
8912 388926 0 0 3 0x14200 bored softnet
51126 317949 0 0 3 0x14200 bored systqmp
88054 395064 0 0 3 0x14200 bored systq
37633 347537 0 0 3 0x40014200 bored softclock
74448 17296 0 0 3 0x40014200 idle0
1 344151 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 6443K 7579K 78643K 49343 0
pcb 13 16K 18K 78643K 1675 0
rtable 189 15K 15K 78643K 2897 0
ifaddr 102 29K 29K 78643K 919 0
sysctl 2 0K 2K 78643K 5 0
counters 28 17K 17K 78643K 405 0
ioctlops 0 0K 4K 78643K 1420 0
iov 0 0K 28K 78643K 1850 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1658 104K 104K 78643K 13859 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 75 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1416 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 10 33K 69K 78643K 8735 0
sigio 0 0K 0K 78643K 37 0
proc 64 59K 75K 78643K 2470 0
subproc 104 6K 6K 78643K 913 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 345 0
in_multi 81 5K 6K 78643K 989 0
ether_multi 1 0K 0K 78643K 46 0
mrt 1 0K 0K 78643K 41 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 223 996K 996K 78643K 223 0
exec 0 0K 1K 78643K 2664 0
pfkey data 0 0K 0K 78643K 2 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 291 96K 99K 78643K 54811 0
UVM aobj 131 6K 8K 78643K 150 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 295 0
NDP 13 0K 2K 78643K 330 0
temp 133 5770K 6797K 78643K 113195 0
kqueue 12 18K 26K 78643K 767 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 719 0 716 9 8 1 3 0 8 0
rtentry 112 949 0 868 5 2 3 4 0 8 0
unpcb 144 9681 0 9668 89 88 1 10 0 8 0
syncache 296 61 0 61 14 14 0 1 0 8 0
tcpqe 32 166 0 166 9 9 0 1 0 8 0
tcpcb 776 4874 0 4870 103 102 1 15 0 8 0
arp 88 156 0 142 1 0 1 1 0 8 0
ipq 40 8 0 8 3 3 0 1 0 8 0
ipqe 40 85 0 85 3 3 0 1 0 8 0
inpcb 336 12030 0 12023 158 152 6 22 0 8 5
nd6 48 227 0 209 1 0 1 1 0 8 0
pkpcb 40 164 0 164 6 6 0 1 0 8 0
kcovpl 48 70 0 62 1 0 1 1 0 8 0
mppekey 1024 4 0 4 1 1 0 1 0 8 0
ppxss 1160 252 0 252 14 14 0 1 0 8 0
pppxif 1360 203 0 203 11 11 0 1 0 8 0
pfstscr 40 132 0 114 1 0 1 1 0 8 0
pfosfp 40 26 0 21 1 0 1 1 0 8 0
pfosfpen 112 26 0 10 1 0 1 1 0 8 0
pfanchor 1280 512 2 0 43 0 43 43 0 8 0
pfstitem 24 183 0 148 1 0 1 1 0 8 0
pfstkey 128 270 0 256 1 0 1 1 0 8 0
pfstate 352 138 0 120 4 2 2 2 0 8 0
rttmr 136 10 0 10 3 3 0 1 0 8 0
art_heap8 4096 5 0 4 5 4 1 2 0 8 0
art_heap4 256 4090 0 3730 54 31 23 29 0 8 0
art_table 32 4095 0 3734 4 1 3 4 0 8 0
art_node 16 940 0 870 1 0 1 1 0 8 0
sysvmsgpl 40 47 0 7 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 1414 0 1404 1 0 1 1 0 8 0
shmpl 112 147 0 19 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 12884 0 11424 92 0 92 92 0 8 0
ffsino 240 12884 0 11424 86 0 86 86 0 8 0
nchpl 144 24261 0 22631 63 1 62 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 99372 0 99372 9 9 0 3 0 8 0
vmpool 664 163 0 163 9 9 0 1 0 8 0
kstatmem 264 360 0 334 2 0 2 2 0 8 0
scsiplug 72 8 0 8 3 3 0 1 0 8 0
scxspl 216 78880 0 78880 23 22 1 8 0 8 1
plimitpl 152 1724 0 1708 1 0 1 1 0 8 0
sigapl 424 8981 0 8922 8 0 8 8 0 8 0
futexpl 64 96189 0 96189 3 3 0 1 0 8 0
knotepl 120 158205 0 158125 45 39 6 11 0 8 1
kqueuepl 184 1741 0 1733 22 21 1 4 0 8 0
pipepl 288 2596 0 2568 71 68 3 11 0 8 0
fdescpl 432 8883 0 8862 4 0 4 4 0 8 0
filepl 120 76700 0 76467 109 101 8 18 0 8 0
lockfpl 104 13589 0 13587 32 31 1 6 0 8 0
lockfspl 48 6144 0 6142 7 6 1 3 0 8 0
sessionpl 144 86 0 70 1 0 1 1 0 8 0
pgrppl 48 130 0 114 1 0 1 1 0 8 0
ucredpl 104 9809 0 9795 1 0 1 1 0 8 0
zombiepl 144 8923 0 8922 1 0 1 1 0 8 0
processpl 1008 8981 0 8922 10 1 9 9 0 8 0
procpl 696 21086 0 21014 16 7 9 10 0 8 0
sosppl 168 117 0 117 16 16 0 1 0 8 0
sockpl 456 22607 0 22584 530 519 11 37 0 8 8
mcl64k 65536 235 0 235 18 18 0 1 0 8 0
mcl16k 16384 122 0 122 19 19 0 1 0 8 0
mcl12k 12288 280 0 280 19 19 0 1 0 8 0
mcl9k 9216 110 0 110 18 18 0 1 0 8 0
mcl8k 8192 457 0 457 16 16 0 1 0 8 0
mcl4k 4096 1106 0 1106 11 11 0 1 0 8 0
mcl2k2 2112 64 0 64 25 25 0 1 0 8 0
mcl2k 2048 103265 0 103194 71 60 11 34 0 8 1
mtagpl 96 7918 0 7683 49 34 15 29 0 8 0
mbufpl 256 279523 0 279056 564 507 57 133 0 8 0
bufpl 288 18162 0 11768 458 0 458 458 0 8 0
anonpl 24 1701886 0 1675407 284 121 163 170 0 188 3
amapchunkpl 152 155789 0 154422 119 66 53 56 0 158 0
amappl16 200 16357 0 15762 107 74 33 45 0 8 0
amappl15 192 5 0 5 1 1 0 1 0 8 0
amappl14 184 385 0 369 2 0 2 2 0 8 0
amappl13 176 13 0 11 1 0 1 1 0 8 0
amappl12 168 1141 0 1140 1 0 1 1 0 8 0
amappl11 160 51 0 41 1 0 1 1 0 8 0
amappl10 152 97 0 88 1 0 1 1 0 8 0
amappl9 144 995 0 994 1 0 1 1 0 8 0
amappl8 136 326 0 260 3 0 3 3 0 8 0
amappl7 128 277 0 252 2 0 2 2 0 8 0
amappl6 120 450 0 440 2 1 1 2 0 8 0
amappl5 112 458 0 452 1 0 1 1 0 8 0
amappl4 104 1251 0 1221 2 1 1 2 0 8 0
amappl3 96 24257 0 24213 2 0 2 2 0 8 0
amappl2 88 9904 0 9837 3 1 2 3 0 8 0
amappl1 80 206302 0 205577 35 17 18 26 0 8 0
amappl 88 53615 0 53461 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 72 149 0 19 3 0 3 3 0 8 0
uaddrrnd 24 9046 0 9025 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 9046 0 9025 1 0 1 1 0 8 0
vmmpekpl 168 70150 0 70097 4 1 3 3 0 8 0
vmmpepl 168 851124 0 848611 335 193 142 163 0 357 3
vmsppl 344 9045 0 9024 3 0 3 3 0 8 0
rwobjpl 24 217132 0 209349 52 3 49 49 0 8 0
pdppl 4096 18098 0 18048 621 560 61 66 0 8 11
pvpl 32 3448185 0 3427319 622 329 293 361 0 265 78
pmappl 216 9045 0 9024 2 0 2 2 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2271 0 1469 26 0 26 26 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82722f34) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff827a0c78,ffffffff8275cfb6,1f4,ffffffff82774c92) at __assert+0x25 sys/kern/subr_prf.c:157
timeout_bucket(fffffd8077683f08) at timeout_bucket+0x1e4 sys/kern/kern_timeout.c:503
softclock_process_kclock_timeout(fffffd8077683f08,0) at softclock_process_kclock_timeout+0xe5 sys/kern/kern_timeout.c:656
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
Xspllower() at Xspllower+0x19
printf(ffffffff827048df) at printf+0x84 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807e691568,e0fceb75000,e0fced74000) at uvm_fault_unwire_locked+0x20c sys/uvm/uvm_fault.c:1679
uvm_unmap_kill_entry_withlock(fffffd807e691568,fffffd8069b66d90,0) at uvm_unmap_kill_entry_withlock+0x62 sys/uvm/uvm_map.c:1924
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 sys/uvm/uvm_map.c:2578
uvmspace_free(fffffd807e691568) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3516
reaper(ffff8000ffff8ae8) at reaper+0x15d sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82722f34) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff827a0c78,ffffffff8275cfb6,1f4,ffffffff82774c92) at __assert+0x25 sys/kern/subr_prf.c:157
timeout_bucket(fffffd8077683f08) at timeout_bucket+0x1e4 sys/kern/kern_timeout.c:503
softclock_process_kclock_timeout(fffffd8077683f08,0) at softclock_process_kclock_timeout+0xe5 sys/kern/kern_timeout.c:656
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:717
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
Xspllower() at Xspllower+0x19
printf(ffffffff827048df) at printf+0x84 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807e691568,e0fceb75000,e0fced74000) at uvm_fault_unwire_locked+0x20c sys/uvm/uvm_fault.c:1679
uvm_unmap_kill_entry_withlock(fffffd807e691568,fffffd8069b66d90,0) at uvm_unmap_kill_entry_withlock+0x62 sys/uvm/uvm_map.c:1924
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807e691568) at uvm_map_teardown+0x157 sys/uvm/uvm_map.c:2578
uvmspace_free(fffffd807e691568) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3516
reaper(ffff8000ffff8ae8) at reaper+0x15d sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -15