uvm_fault(0xffffffff82bcbd30, 0xffff8000211f3000, 0, 2) -> e
kernel: page fault trap, code=0
Stopped at kcov_remote_enter+0x112: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*337633 13173 0 0 0 0 syz-executor.3
kcov_remote_enter(0,ffff8000fffeefd0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff80002b423140) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff80002b423140,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7fffffb660, count: 9
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: uvm_fault(0xffffffff82bcbd30, 0xffff8000211f3000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff8000fffeefd0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff80002b423140) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff80002b423140,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7fffffb660, count: -6
ddb> show registers
rdi 0x4
rsi 0xffff8000006b4a00
rbp 0xffff80002174a360
rbx 0
rdx 0xffff80002b422858
rcx 0xffff8000211f3000
rax 0xfffffd8067767c60
r8 0
r9 0
r10 0x68e82c547c549444
r11 0x506a23b9f971a9f8
r12 0xffff80002b423080
r13 0xffffffff82b9dff0 cpu_info_full_primary+0x1ff0
r14 0xffff8000fffeefd0
r15 0
rip 0xffffffff819ddc22 kcov_remote_enter+0x112
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff80002174a340
ss 0
kcov_remote_enter+0x112: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor.3) pid=337633 stat=onproc
flags process=0 proc=0
pri=83, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff80002b422b10,0xffff80002b4238b8
process=0xffff80002e8367e0 user=0xffff800021745000, vmspace=0xfffffd8069b5f570
estcpu=36, cpticks=3, pctcpu=0.0
user=1, sys=0, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
94842 309179 8121 0 2 0 syz-executor.5
13818 49342 57942 0 2 0 syz-executor.6
13818 235818 57942 0 2 0x4000000 syz-executor.6
*13173 337633 12832 0 7 0 syz-executor.3
13173 140941 12832 0 3 0x4000080 tunread syz-executor.3
54878 385321 13511 0 2 0 syz-executor.7
54878 70551 13511 0 3 0x4000080 fsleep syz-executor.7
85560 504898 75826 0 2 0 syz-executor.0
85560 368720 75826 0 2 0x4000000 syz-executor.0
74899 4889 5665 0 2 0 syz-executor.2
74899 364316 5665 0 3 0x4000080 fsleep syz-executor.2
57942 169194 71327 0 3 0x82 nanoslp syz-executor.6
75826 443912 71327 0 3 0x82 nanoslp syz-executor.0
8121 149688 71327 0 3 0x82 nanoslp syz-executor.5
12832 167771 71327 0 3 0x82 nanoslp syz-executor.3
5665 336429 71327 0 3 0x82 nanoslp syz-executor.2
91155 347456 71327 0 3 0x82 nanoslp syz-executor.1
13511 405272 71327 0 3 0x82 nanoslp syz-executor.7
2090 443418 0 0 3 0x14200 bored sosplice
93821 207441 71327 0 2 0x2 syz-executor.4
71327 185570 28849 0 3 0x82 wait syz-fuzzer
71327 95764 28849 0 3 0x4000082 nanoslp syz-fuzzer
71327 208517 28849 0 3 0x4000082 thrsleep syz-fuzzer
71327 451175 28849 0 3 0x4000082 thrsleep syz-fuzzer
71327 77613 28849 0 3 0x4000082 wait syz-fuzzer
71327 245080 28849 0 3 0x4000082 wait syz-fuzzer
71327 32108 28849 0 3 0x4000082 thrsleep syz-fuzzer
71327 390228 28849 0 3 0x4000082 kqread syz-fuzzer
71327 242634 28849 0 3 0x4000082 wait syz-fuzzer
71327 297223 28849 0 3 0x4000082 wait syz-fuzzer
71327 346364 28849 0 3 0x4000082 thrsleep syz-fuzzer
71327 90587 28849 0 3 0x4000082 wait syz-fuzzer
71327 386523 28849 0 3 0x4000082 wait syz-fuzzer
71327 175139 28849 0 3 0x4000082 wait syz-fuzzer
28849 248414 12210 0 3 0x10008a sigsusp ksh
12210 430332 17373 0 3 0x9a kqread sshd
4916 430518 1 0 3 0x100083 ttyin getty
17373 378148 1 0 3 0x88 kqread sshd
51815 358782 9728 73 3 0x1100090 kqread syslogd
9728 184080 1 0 3 0x100082 netio syslogd
12813 270498 1 0 3 0x100080 kqread resolvd
60712 237627 32147 77 3 0x100092 kqread dhcpleased
80884 453075 32147 77 3 0x100092 kqread dhcpleased
32147 305830 1 0 3 0x80 kqread dhcpleased
19261 254247 0 0 3 0x14200 bored smr
93643 301318 0 0 2 0x14200 zerothread
63318 35419 0 0 3 0x14200 aiodoned aiodoned
90301 382897 0 0 3 0x14200 syncer update
82302 289769 0 0 3 0x14200 cleaner cleaner
40318 307807 0 0 3 0x14200 reaper reaper
57530 109399 0 0 3 0x14200 pgdaemon pagedaemon
96706 10397 0 0 3 0x14200 bored viomb
85809 339355 0 0 3 0x40014200 acpi0 acpi0
80239 168212 0 0 3 0x14200 bored softnet
26038 122761 0 0 3 0x14200 bored softnet
32896 412379 0 0 3 0x14200 bored softnet
30200 8373 0 0 3 0x14200 bored softnet
20923 66546 0 0 3 0x14200 bored systqmp
15993 314557 0 0 3 0x14200 bored systq
58403 122205 0 0 3 0x40014200 bored softclock
13423 279739 0 0 3 0x40014200 idle0
1 324788 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 10237 6488K 7235K 78643K 28801 0
pcb 13 18K 22K 78643K 1076 0
rtable 180 15K 16K 78643K 1744 0
ifaddr 82 23K 24K 78643K 460 0
sysctl 2 0K 0K 78643K 2 0
counters 28 17K 17K 78643K 176 0
ioctlops 0 0K 2K 78643K 472 0
iov 0 0K 40K 78643K 554 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1498 94K 94K 78643K 6918 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 36 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1388 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 16 57K 69K 78643K 5270 0
sigio 0 0K 0K 78643K 134 0
proc 58 59K 75K 78643K 1103 0
subproc 104 6K 6K 78643K 338 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 660 0
in_multi 72 4K 6K 78643K 447 0
ether_multi 1 0K 0K 78643K 53 0
mrt 1 0K 0K 78643K 4 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 235 1049K 1049K 78643K 235 0
exec 0 0K 1K 78643K 1096 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 290 87K 103K 78643K 34410 0
UVM aobj 131 4K 4K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 223 0
NDP 13 0K 2K 78643K 128 0
temp 133 5770K 6798K 78643K 82029 0
kqueue 13 20K 28K 78643K 592 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 120 624 0 621 11 10 1 4 0 8 0
rtentry 112 381 0 306 4 0 4 4 0 8 0
unpcb 144 5016 0 5003 38 37 1 6 0 8 0
syncache 296 37 0 37 7 7 0 1 0 8 0
tcpqe 32 145 0 145 5 5 0 1 0 8 0
tcpcb 776 1756 0 1752 54 53 1 14 0 8 0
arp 88 63 0 51 1 0 1 1 0 8 0
ipq 40 5 0 4 2 1 1 1 0 8 0
ipqe 40 6 0 4 2 1 1 1 0 8 0
inpcb 336 6154 0 6147 79 72 7 13 0 8 6
nd6 48 85 0 68 1 0 1 1 0 8 0
pkpcb 40 3 0 3 1 1 0 1 0 8 0
kcovpl 48 26 0 18 1 0 1 1 0 8 0
mppekey 1024 4 0 4 1 1 0 1 0 8 0
ppxss 1160 100 0 100 6 5 1 1 0 8 1
pppxif 1360 16 0 16 4 3 1 1 0 8 1
pfstscr 40 81 0 74 1 0 1 1 0 8 0
pfosfp 40 3 0 2 1 0 1 1 0 8 0
pfosfpen 112 3 0 2 1 0 1 1 0 8 0
pfanchor 1280 8 0 0 1 0 1 1 0 8 0
pfstitem 24 55 0 41 1 0 1 1 0 8 0
pfstkey 128 127 0 89 2 0 2 2 0 8 0
pfstate 352 81 0 74 1 0 1 1 0 8 0
art_heap8 4096 4 0 3 4 3 1 2 0 8 0
art_heap4 256 1704 0 1341 37 14 23 29 0 8 0
art_table 32 1708 0 1344 4 0 4 4 0 8 0
art_node 16 380 0 315 1 0 1 1 0 8 0
sysvmsgpl 40 24 0 18 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 1384 0 1374 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 8176 0 6738 90 0 90 90 0 8 0
ffsino 240 8176 0 6738 85 0 85 85 0 8 0
nchpl 144 16656 0 15015 63 0 63 63 0 8 0
rtmask 32 3 0 3 1 1 0 1 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 59104 0 59104 7 6 1 2 0 8 1
vmpool 664 18 0 18 5 5 0 1 0 8 0
kstatmem 264 144 0 118 3 1 2 3 0 8 0
scxspl 216 42691 0 42691 21 20 1 8 0 8 1
plimitpl 152 456 0 441 1 0 1 1 0 8 0
sigapl 424 5590 0 5545 8 1 7 8 0 8 0
futexpl 64 61039 0 61037 3 2 1 1 0 8 0
knotepl 120 76204 0 76123 47 40 7 11 0 8 4
kqueuepl 184 2229 0 2220 17 16 1 4 0 8 0
pipepl 288 1538 0 1510 36 29 7 11 0 8 4
fdescpl 432 5512 0 5485 4 0 4 4 0 8 0
filepl 120 45253 0 45015 63 49 14 16 0 8 6
lockfpl 104 1178 0 1176 3 2 1 2 0 8 0
lockfspl 48 312 0 310 1 0 1 1 0 8 0
sessionpl 144 41 0 25 1 0 1 1 0 8 0
pgrppl 48 93 0 77 1 0 1 1 0 8 0
ucredpl 104 4626 0 4615 1 0 1 1 0 8 0
zombiepl 144 5546 0 5545 3 2 1 1 0 8 0
processpl 1008 5590 0 5545 10 3 7 9 0 8 0
procpl 696 12893 0 12830 13 5 8 10 0 8 0
sosppl 168 31 0 31 6 6 0 1 0 8 0
sockpl 456 11797 0 11774 244 233 11 28 0 8 8
mcl64k 65536 162 0 162 10 9 1 1 0 8 1
mcl16k 16384 90 0 90 9 9 0 1 0 8 0
mcl12k 12288 163 0 163 10 9 1 1 0 8 1
mcl9k 9216 62 0 62 12 12 0 1 0 8 0
mcl8k 8192 244 0 244 12 11 1 1 0 8 1
mcl4k 4096 726 0 725 7 6 1 1 0 8 0
mcl2k2 2112 131 0 131 8 7 1 1 0 8 1
mcl2k 2048 85918 0 85833 43 31 12 33 0 8 0
mtagpl 96 2530 0 2218 26 8 18 24 0 8 0
mbufpl 256 193635 0 193137 466 403 63 113 0 8 0
bufpl 288 12174 0 5780 457 0 457 457 0 8 0
anonpl 24 1050298 0 1035770 161 51 110 130 0 188 2
amapchunkpl 152 111298 0 110640 90 56 34 42 0 158 5
amappl16 200 10059 0 9470 61 26 35 45 0 8 3
amappl15 192 12 0 11 1 0 1 1 0 8 0
amappl14 184 222 0 210 2 1 1 2 0 8 0
amappl13 176 5 0 5 1 1 0 1 0 8 0
amappl12 168 625 0 623 1 0 1 1 0 8 0
amappl11 160 48 0 38 1 0 1 1 0 8 0
amappl10 152 57 0 47 1 0 1 1 0 8 0
amappl9 144 979 0 977 1 0 1 1 0 8 0
amappl8 136 233 0 169 3 0 3 3 0 8 0
amappl7 128 182 0 159 2 0 2 2 0 8 0
amappl6 120 255 0 244 2 1 1 2 0 8 0
amappl5 112 244 0 238 1 0 1 1 0 8 0
amappl4 104 703 0 674 2 1 1 2 0 8 0
amappl3 96 15025 0 14976 2 0 2 2 0 8 0
amappl2 88 6089 0 6020 3 1 2 3 0 8 0
amappl1 80 123464 0 122768 28 12 16 26 0 8 0
amappl 88 33622 0 33455 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 5530 0 5503 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5530 0 5503 1 0 1 1 0 8 0
vmmpekpl 168 45501 0 45450 3 0 3 3 0 8 0
vmmpepl 168 504411 0 501729 257 115 142 156 0 357 16
vmsppl 344 5529 0 5503 3 0 3 3 0 8 0
rwobjpl 24 132285 0 124570 53 5 48 49 0 8 0
pdppl 4096 11066 0 11006 337 273 64 66 0 8 4
pvpl 32 2093000 0 2073220 402 209 193 359 0 265 1
pmappl 216 5529 0 5503 2 0 2 2 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1690 0 872 25 0 25 25 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff8000fffeefd0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff80002b423140) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff80002b423140,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7fffffb660, count: -6
ddb> machine ddbcpu 1
No such command
ddb> trace
kcov_remote_enter(0,ffff8000fffeefd0) at kcov_remote_enter+0x112 sys/dev/kcov.c:672
timeout_run(ffff80002b423140) at timeout_run+0x80 sys/kern/kern_timeout.c:639
softclock_process_tick_timeout(ffff80002b423140,0) at softclock_process_tick_timeout+0x1ac sys/kern/kern_timeout.c:688
softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:711
softintr_dispatch(0) at softintr_dispatch+0xd1 sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7fffffb660, count: -6