uvm_fault(0xffffffff83617818, 0xffff800029fe6000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*467814 65817 0 0 0x4000000 0 syz-executor
kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660
softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719
softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161
sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915
VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf
syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbb32811b570, count: 2
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(0xffffffff83617818, 0xffff800029fe6000, 0, 2) -> e
ddb> trace
kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660
softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719
softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161
sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915
VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf
syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbb32811b570, count: -13
ddb> show registers
rdi 0xffffffff
rsi 0xffff800000b10c00
rbp 0xffff80002a9c6d70
rbx 0x7fff05dc
rdx 0xffff800039ddacd0
rcx 0xffff800029fe6000
rax 0xfffffd806c1dfe10
r8 0
r9 0x201
r10 0xffff80002a9c6df0
r11 0xfdfe74bd04c9b58d
r12 0xffff80002a87cf68
r13 0xffffffff8349aff0 cpu_info_full_primary+0x1ff0
r14 0xffff8000ffff88b8
r15 0
rip 0xffffffff8150c092 kcov_remote_enter+0x122
cs 0x8
rflags 0x10297 __ALIGN_SIZE+0xf297
rsp 0xffff80002a9c6d50
ss 0x10
kcov_remote_enter+0x122: movq $0,0(%rcx)
ddb> show proc
PROC (syz-executor) tid=467814 pid=65817 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800039dda028,0xffffffff8362d140
process=0xffff80002a872f80 user=0xffff80002a9c2000, vmspace=0xfffffd806c04fcc0
estcpu=36, cpticks=20, pctcpu=0.0, user=0, sys=0, intr=20
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
65817 64962 23513 0 2 0 syz-executor
*65817 467814 23513 0 7 0x4000000 syz-executor
65976 43832 94829 0 2 0x2 ndp
94829 123228 82471 0 3 0x10008a sigsusp sh
62792 264645 8973 0 3 0x80 nanoslp syz-executor
62792 107841 8973 0 3 0x4000080 netcon syz-executor
62792 401875 8973 0 3 0x4000080 fsleep syz-executor
69143 338906 33592 0 3 0x80 nanoslp syz-executor
69143 44161 33592 0 3 0x4000080 ttyin syz-executor
69143 495386 33592 0 3 0x4000080 fsleep syz-executor
69143 85592 33592 0 3 0x4000080 fsleep syz-executor
82471 192494 75027 0 3 0x82 wait syz-executor
33592 385726 75027 0 3 0x82 nanoslp syz-executor
4549 359594 75027 0 3 0x82 wait syz-executor
22280 128950 75027 0 2 0x2 syz-executor
23513 253413 75027 0 3 0x82 nanoslp syz-executor
84725 376449 75027 0 3 0x82 piperd syz-executor
8973 256732 75027 0 3 0x82 nanoslp syz-executor
77033 102127 0 0 3 0x14280 nfsidl nfsio
22881 516942 0 0 3 0x14280 nfsidl nfsio
52527 63082 0 0 3 0x14280 nfsidl nfsio
28982 36437 0 0 3 0x14280 nfsidl nfsio
86743 456659 0 0 3 0x14280 nfsidl nfsio
79679 120241 0 0 3 0x14280 nfsidl nfsio
94190 507291 0 0 3 0x14280 nfsidl nfsio
95353 436917 0 0 3 0x14280 nfsidl nfsio
44686 302530 0 0 3 0x14280 nfsidl nfsio
81942 479211 0 0 3 0x14280 nfsidl nfsio
53589 497035 0 0 3 0x14280 nfsidl nfsio
54199 377177 0 0 3 0x14280 nfsidl nfsio
94833 207443 0 0 3 0x14280 nfsidl nfsio
34706 465627 0 0 3 0x14280 nfsidl nfsio
97253 104373 0 0 3 0x14280 nfsidl nfsio
99674 237915 0 0 3 0x14280 nfsidl nfsio
53319 16471 0 0 3 0x14280 nfsidl nfsio
79112 255918 0 0 3 0x14280 nfsidl nfsio
15333 271927 0 0 3 0x14280 nfsidl nfsio
9881 203077 0 0 3 0x14280 nfsidl nfsio
72123 269997 1 0 3 0x100083 ttyin getty
30634 213006 0 0 3 0x14200 bored sosplice
66840 422610 75027 0 3 0x82 wait syz-executor
75027 352946 13620 0 2 0x2 syz-executor
13620 473559 37088 0 3 0x10008a sigsusp ksh
37088 117545 34619 0 3 0x98 kqread sshd-session
34619 184224 88505 0 3 0x92 kqread sshd-session
88505 498699 1 0 3 0x88 kqread sshd
70744 357907 27747 73 3 0x1100090 kqread syslogd
27747 262900 1 0 3 0x100082 sbwait syslogd
33672 372146 1 0 3 0x100080 kqread resolvd
83639 246264 60277 77 3 0x100092 kqread dhcpleased
85386 63062 60277 77 3 0x100092 kqread dhcpleased
60277 63260 1 0 3 0x80 kqread dhcpleased
31309 326611 0 0 3 0x14200 bored smr
47582 84732 0 0 2 0x14200 zerothread
3254 18838 0 0 3 0x14200 aiodoned aiodoned
2747 8970 0 0 3 0x14200 syncer update
76511 263811 0 0 3 0x14200 cleaner cleaner
27094 395857 0 0 3 0x14200 reaper reaper
31136 155106 0 0 3 0x14200 pgdaemon pagedaemon
70452 462591 0 0 3 0x14200 bored viomb
23705 43513 0 0 3 0x40014200 acpi0 acpi0
27004 1514 0 0 3 0x14200 bored softnet3
24345 371476 0 0 3 0x14200 bored softnet2
69540 90038 0 0 3 0x14200 bored softnet1
20668 132980 0 0 3 0x14200 bored softnet0
940 193357 0 0 3 0x14200 bored systqmp
45141 321979 0 0 3 0x14200 bored systq
50014 336064 0 0 3 0x40014200 tmoslp softclock
30052 428706 0 0 3 0x40014200 idle0
1 261652 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 10239 11270K 11576K 166960K 18824 0
pcb 17 18K 20K 166960K 822 0
rtable 227 11K 11K 166960K 1281 0
pf 40 15K 23K 166960K 382 0
ifaddr 38 6K 8K 166960K 147 0
ifgroup 53 2K 2K 166960K 174 0
sysctl 4 1K 1K 166960K 8 0
counters 31 17K 17K 166960K 69 0
ioctlops 1 0K 4K 166960K 556 0
iov 0 0K 32K 166960K 491 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1459 92K 92K 166960K 5211 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 9K 166960K 79 0
VM map 2 1K 1K 166960K 2 0
sem 15 68K 68K 166960K 292 0
dirhash 12 2K 3K 166960K 60 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 17 61K 97K 166960K 3720 0
sigio 0 0K 0K 166960K 294 0
proc 60 59K 108K 166960K 1216 0
subproc 72 4K 4K 166960K 189 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 2 0K 0K 166960K 1049 0
in_multi 80 6K 7K 166960K 408 0
ether_multi 1 0K 0K 166960K 27 0
mrt 2 0K 0K 166960K 9 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 259 1155K 1155K 166960K 259 0
exec 0 0K 1K 166960K 1339 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 35 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 207 72K 90K 166960K 34949 0
UVM aobj 157 7K 7K 166960K 162 0
pinsyscall 38 76K 94K 166960K 5103 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 285 0
NDP 14 0K 2K 166960K 106 0
temp 76 6892K 7020K 166960K 105574 0
kqueue 13 20K 32K 166960K 620 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 792 0 789 8 5 3 5 0 8 2
rtentry 112 359 0 263 4 0 4 4 0 8 0
unpcb 144 3858 0 3842 11 3 8 8 0 8 7
syncache 336 5 0 5 1 1 0 1 0 8 0
tcpqe 32 2 0 2 1 1 0 1 0 8 0
tcpcb 808 1193 0 1188 18 10 8 8 0 8 7
arp 88 71 0 44 1 0 1 1 0 8 0
ipq 40 12 0 10 1 0 1 1 0 8 0
ipqe 40 154 0 151 1 0 1 1 0 8 0
inpcb 344 4590 0 4578 45 36 9 17 0 8 7
nd6 104 81 0 62 1 0 1 1 0 8 0
pkpcb 40 26 0 26 3 2 1 1 0 8 1
kcovpl 48 21 0 13 1 0 1 1 0 8 0
ppxss 1072 18 0 17 2 1 1 1 0 8 0
pfstscr 40 10 0 7 1 0 1 1 0 8 0
pfrktable 1344 19 0 16 2 1 1 1 0 8 0
pfanchor 1288 9 0 3 1 0 1 1 0 8 0
pftag 88 8 0 5 1 0 1 1 0 8 0
pfqueue 320 5 0 2 1 0 1 1 0 8 0
pfstitem 24 18 0 6 1 0 1 1 0 8 0
pfstkey 128 44 0 30 1 0 1 1 0 8 0
pfstate 344 23 0 17 1 0 1 1 0 8 0
pfrule 1344 74 0 67 2 1 1 1 0 8 0
art_heap8 4096 5 0 0 5 0 5 5 0 8 0
art_heap4 256 1419 0 1035 35 9 26 29 0 8 2
art_table 32 1424 0 1035 4 0 4 4 0 8 0
art_node 16 350 0 267 1 0 1 1 0 8 0
sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0
semapl 112 287 0 274 1 0 1 1 0 8 0
shmpl 112 159 0 5 5 0 5 5 0 8 0
dirhash 1024 50 0 33 3 0 3 3 0 8 0
dino2pl 256 8134 0 6605 96 0 96 96 0 8 0
ffsino 248 8134 0 6605 96 0 96 96 0 8 0
nchpl 144 13438 0 12868 64 33 31 64 0 8 8
uvmvnodes 80 8976 0 0 184 0 184 184 0 8 0
vnodes 216 8976 0 0 499 0 499 499 0 8 0
namei 1024 51268 0 51267 5 4 1 2 0 8 0
pfiaddrpl 120 4 0 2 2 1 1 1 0 8 0
kstatmem 264 100 0 76 2 0 2 2 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 20 0 20 3 2 1 1 0 8 1
scxspl 216 40436 0 40436 17 9 8 8 1 8 8
plimitpl 152 1474 0 1457 1 0 1 1 0 8 0
sigapl 424 4003 0 3937 8 0 8 8 0 8 0
futexpl 64 57143 0 57140 1 0 1 1 0 8 0
knotepl 120 138817 0 138769 53 40 13 17 0 8 8
kqueuepl 184 1187 0 1178 7 3 4 4 0 8 3
pipepl 296 1017 0 989 13 5 8 8 0 8 4
fdescpl 440 3961 0 3932 5 1 4 5 0 8 0
filepl 120 32242 0 32020 37 20 17 17 0 8 6
lockfpl 104 1343 0 1341 2 0 2 2 0 8 1
lockfspl 48 395 0 393 1 0 1 1 0 8 0
sessionpl 144 37 0 29 1 0 1 1 0 8 0
pgrppl 48 233 0 216 1 0 1 1 0 8 0
ucredpl 104 5936 0 5924 1 0 1 1 0 8 0
zombiepl 144 3939 0 3937 2 1 1 1 0 8 0
processpl 1104 4003 0 3937 5 0 5 5 0 8 0
procpl 648 9213 0 9141 8 0 8 8 0 8 0
sosppl 168 17 0 17 4 3 1 1 0 8 1
sockpl 528 9391 0 9363 55 45 10 23 0 8 7
mcl64k 65536 85 0 84 3 2 1 1 0 8 0
mcl16k 16384 5 0 5 2 1 1 1 0 8 1
mcl12k 12288 1 0 1 1 0 1 1 0 8 1
mcl9k 9216 1 0 1 1 0 1 1 0 8 1
mcl8k 8192 109 0 109 3 2 1 1 0 8 1
mcl4k 4096 7237 0 7185 16 8 8 13 0 8 0
mcl2k 2048 4406 0 4396 5 2 3 3 0 8 1
mtagpl 96 319 0 207 3 0 3 3 0 8 0
mbufpl 256 50303 0 50026 376 350 26 286 0 8 5
bufpl 280 12291 0 6052 446 0 446 446 0 8 0
anonpl 24 515882 0 512381 104 45 59 59 0 187 23
amapchunkpl 152 120414 0 119957 58 26 32 36 0 158 11
amappl16 200 11005 0 10970 81 67 14 16 0 8 8
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 141 0 131 1 0 1 1 0 8 0
amappl13 176 11 0 11 2 1 1 1 0 8 1
amappl12 168 4781 0 4752 3 1 2 3 0 8 0
amappl11 160 45 0 35 1 0 1 1 0 8 0
amappl10 152 12 0 11 1 0 1 1 0 8 0
amappl9 144 239 0 238 2 1 1 1 0 8 0
amappl8 136 30 0 28 1 0 1 1 0 8 0
amappl7 128 142 0 131 1 0 1 1 0 8 0
amappl6 120 315 0 310 1 0 1 1 0 8 0
amappl5 112 175 0 168 1 0 1 1 0 8 0
amappl4 104 363 0 348 1 0 1 1 0 8 0
amappl3 96 24259 0 24159 4 0 4 4 0 8 0
amappl2 88 864 0 803 2 0 2 2 0 8 0
amappl1 80 19665 0 19144 13 1 12 13 0 8 0
amappl 88 34193 0 34036 5 0 5 5 0 92 0
dma16384 16384 1 0 1 1 0 1 1 0 8 1
dma4096 4096 2 0 2 2 1 1 1 0 8 1
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 9 0 9 3 2 1 1 0 8 1
dma128 128 259 0 259 2 1 1 1 0 8 1
dma64 64 7 0 7 2 1 1 1 0 8 1
dma32 32 8 0 8 2 1 1 1 0 8 1
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 161 0 5 3 0 3 3 0 8 0
uaddrrnd 24 3961 0 3932 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3961 0 3932 1 0 1 1 0 8 0
vmmpekpl 168 28206 0 28149 3 0 3 3 0 8 0
vmmpepl 168 239538 0 237841 114 24 90 90 0 357 6
vmsppl 360 3960 0 3932 4 1 3 4 0 8 0
rwobjpl 32 67047 0 57048 83 2 81 81 0 8 0
pdppl 4096 7928 0 7864 148 80 68 82 0 8 4
pvpl 32 1584610 0 1575993 208 79 129 137 0 265 29
pmappl 216 3960 0 3932 3 0 3 3 0 8 1
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 723 0 472 16 7 9 15 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660
softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719
softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161
sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915
VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf
syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbb32811b570, count: -13
ddb> machine ddbcpu 1
No such command
ddb> trace
kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660
softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719
softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161
sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915
VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf
syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbb32811b570, count: -13