*cpu1: uvm_fault(0xffffffff835c9480, 0xffff80002a0c5000, 0, 1) -> e
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x76c4bee3f20, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002a08e810
rbx 0
rdx 0
rcx 0xffff8000ffff2020
rax 0x32
r8 0xffff80002a08e740
r9 0x8080808080808080
r10 0xde0a65e555f81f2e
r11 0x808e1fb6f11ab8b6
r12 0
r13 0
r14 0xffff8000ffff2020
r15 0
rip 0xffffffff828bc3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002a08e790
ss 0x10
savectx+0xae: movl $0,%gs:0x680
ddb{0}> show proc
PROC (syz-executor) tid=123682 pid=5018 tcnt=4 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=50, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000ffff2530,0xffff8000ffff27c8
process=0xffff8000ffff71f0 user=0xffff80002a089000, vmspace=0xfffffd806bec0dc0
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
66221 210534 95989 0 2 0 syz-executor
66221 465808 95989 0 7 0x4000000 syz-executor
5018 129387 16098 60928 3 0x90 nanoslp syz-executor
* 5018 123682 16098 60928 7 0x4000010 syz-executor
5018 97877 16098 60928 3 0x4000090 fsleep syz-executor
5018 179137 16098 60928 3 0x4000090 fsleep syz-executor
73156 23116 32603 0 3 0x80 nanoslp syz-executor
73156 312802 32603 0 3 0x4000080 kqpoll syz-executor
73156 477398 32603 0 3 0x4000080 fsleep syz-executor
15009 489531 69698 60928 3 0x90 nanoslp syz-executor
15009 87820 69698 60928 3 0x4000090 fsleep syz-executor
15009 443318 69698 60928 3 0x4000090 sbwait syz-executor
15009 253570 69698 60928 3 0x4000090 fsleep syz-executor
72224 145846 29073 0 3 0x80 nanoslp syz-executor
72224 362396 29073 0 3 0x4000080 ttyin syz-executor
72224 104553 29073 0 3 0x4000080 fsleep syz-executor
32103 277875 1 0 3 0x100083 ttyin getty
29073 17640 68733 0 3 0x82 nanoslp syz-executor
32603 345221 68733 0 3 0x82 nanoslp syz-executor
13573 304678 68733 0 3 0x2 biowait syz-executor
16098 337288 68733 0 3 0x82 nanoslp syz-executor
11106 285470 68733 0 3 0x82 wait syz-executor
69698 485226 68733 0 3 0x82 nanoslp syz-executor
7296 181989 68733 0 3 0x82 wait syz-executor
95989 300263 68733 0 3 0x82 nanoslp syz-executor
54991 300840 0 0 3 0x14200 bored sosplice
68733 504194 14469 0 3 0x82 kqread syz-executor
14469 286089 76928 0 3 0x10008a sigsusp ksh
76928 142542 74178 0 3 0x98 kqread sshd-session
74178 259930 43347 0 3 0x92 kqread sshd-session
43347 340538 1 0 3 0x88 kqread sshd
90600 102367 33590 74 3 0x1100092 bpf pflogd
33590 16043 1 0 3 0x80 sbwait pflogd
63581 323796 55097 73 3 0x1100090 kqread syslogd
55097 348099 1 0 3 0x100082 sbwait syslogd
27172 516828 1 0 3 0x100080 kqread resolvd
84091 181911 45678 77 3 0x100092 kqread dhcpleased
99001 487541 45678 77 3 0x100092 kqread dhcpleased
45678 228752 1 0 3 0x80 kqread dhcpleased
34423 200177 0 0 3 0x14200 bored smr
77620 445393 0 0 2 0x14200 zerothread
86610 356213 0 0 3 0x14200 aiodoned aiodoned
34038 509950 0 0 3 0x14200 syncer update
83939 103571 0 0 3 0x14200 cleaner cleaner
56923 268296 0 0 3 0x14200 reaper reaper
74091 286143 0 0 3 0x14200 pgdaemon pagedaemon
81929 516119 0 0 3 0x14200 bored viomb
69999 145385 0 0 3 0x40014200 acpi0 acpi0
67121 351135 0 0 3 0x40014200 idle1
24742 427022 0 0 3 0x14200 bored softnet3
44495 55316 0 0 3 0x14200 bored softnet2
72337 93063 0 0 3 0x14200 bored softnet1
94599 326034 0 0 3 0x14200 bored softnet0
59032 335767 0 0 3 0x14200 bored systqmp
18311 439274 0 0 3 0x14200 bored systq
826 28536 0 0 3 0x14200 tmoslp softclockmp
65821 381147 0 0 3 0x40014200 tmoslp softclock
35921 167035 0 0 3 0x40014200 idle0
1 240351 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 66221 (syz-executor) thread 0xffff8000367b7200 (465808)
Process 5018 (syz-executor) thread 0xffff8000ffff2020 (123682)
Process 13573 (syz-executor) thread 0xffff8000ffffd960 (304678)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10251 10201K 10705K 166960K 22743 0
pcb 18 20K 22K 166960K 2041 0
rtable 283 24K 25K 166960K 10281 0
pf 61 23K 87K 166960K 1058 0
ifaddr 48 11K 12K 166960K 1377 0
ifgroup 80 3K 3K 166960K 1541 0
sysctl 4 1K 5K 166960K 17 0
counters 76 37K 38K 166960K 852 0
ioctlops 0 0K 8K 166960K 2899 0
iov 0 0K 24K 166960K 723 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1591 100K 100K 166960K 12831 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 36K 40K 166960K 101 0
VM map 2 1K 1K 166960K 2 0
sem 17 28K 28K 166960K 269 0
dirhash 15 2K 3K 166960K 168 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 17 61K 93K 166960K 11405 0
sigio 0 0K 0K 166960K 171 0
proc 74 91K 152K 166960K 9584 0
subproc 104 6K 7K 166960K 3995 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 1565 0
in_multi 98 7K 7K 166960K 3684 0
ether_multi 1 0K 0K 166960K 97 0
mrt 1 0K 0K 166960K 17 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 295 1314K 1314K 166960K 295 0
exec 0 0K 1K 166960K 5661 0
pfkey data 0 0K 0K 166960K 10 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 300 249K 259K 166960K 91988 0
UVM aobj 8 2K 2K 166960K 10 0
pinsyscall 42 84K 108K 166960K 20288 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 475 0
NDP 18 0K 2K 166960K 1023 0
temp 88 6824K 7455K 166960K 1890204 0
kqueue 13 20K 31K 166960K 1114 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 1674 0 1670 11 10 1 3 0 8 0
rtentry 112 3653 0 3546 7 3 4 4 0 8 0
unpcb 144 7811 0 7792 83 77 6 6 0 8 4
syncache 336 4 0 4 2 2 0 1 0 8 0
tcpcb 808 3818 0 3782 122 114 8 8 0 8 4
arp 120 656 0 638 1 0 1 1 0 8 0
inpcb 336 13871 0 13810 188 179 9 16 0 8 3
nd6 136 967 0 939 1 0 1 1 0 8 0
pkpcb 40 35 0 35 15 14 1 1 0 8 1
kcovpl 48 307 0 299 1 0 1 1 0 8 0
ppxss 1168 56 0 56 29 28 1 1 0 8 1
pfstscr 40 44 0 44 6 6 0 1 0 8 0
pffrag 232 90 0 85 3 2 1 1 0 482 0
pffrnode 88 88 0 83 3 2 1 1 0 8 0
pffrent 40 496 0 491 3 2 1 1 0 8 0
pfosfp 40 1431 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1431 0 714 21 0 21 21 0 8 0
pfrktable 1344 43 0 28 6 4 2 2 0 8 0
pfanchor 1288 12 0 4 1 0 1 1 0 8 0
pftag 88 21 0 11 1 0 1 1 0 8 0
pfqueue 264 2 0 0 1 0 1 1 0 8 0
pfstitem 24 978 0 876 1 0 1 1 0 8 0
pfstkey 128 1073 0 965 4 0 4 4 0 8 0
pfstate 376 1019 0 921 13 3 10 10 0 8 0
pfrule 1344 227 0 156 7 1 6 6 0 8 0
art_heap8 4096 5 0 2 5 2 3 5 0 8 0
art_heap4 256 14395 0 13940 58 29 29 31 0 8 0
art_table 32 14400 0 13942 4 0 4 4 0 8 0
art_node 16 3574 0 3479 1 0 1 1 0 8 0
sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 264 0 249 1 0 1 1 0 8 0
shmpl 112 7 0 2 1 0 1 1 0 8 0
dirhash 1024 125 0 104 4 1 3 4 0 8 0
dino2pl 256 15684 0 13576 133 0 133 133 0 8 0
ffsino 272 15684 0 13576 144 2 142 142 0 8 0
nchpl 144 26396 0 25415 75 38 37 67 0 8 0
uvmvnodes 80 9211 0 0 188 0 188 188 0 8 0
vnodes 216 9211 0 0 512 0 512 512 0 8 0
namei 1024 128816 0 128815 30 29 1 2 0 8 0
percpumem 16 440 0 388 1 0 1 1 0 8 0
vcpupl 3904 35 0 4 4 0 4 4 0 8 0
vmpool 696 56 0 25 4 1 3 3 0 8 0
pfiaddrpl 120 13 0 4 3 2 1 1 0 8 0
kstatmem 264 812 0 776 4 1 3 3 0 8 0
scsiplug 72 21 0 21 13 13 0 1 0 8 0
scxspl 216 230814 0 230813 32 31 1 8 1 8 0
plimitpl 152 2110 0 2092 1 0 1 1 0 8 0
sigapl 424 11146 0 11096 10 3 7 9 0 8 0
futexpl 64 118763 0 118757 26 25 1 1 0 8 0
knotepl 120 1250 0 0 25 3 22 23 0 8 0
kqueuepl 216 2952 0 2877 51 46 5 5 0 8 0
pipepl 320 2121 0 2094 23 20 3 8 0 8 0
fdescpl 496 11097 0 11066 17 12 5 5 0 8 0
filepl 152 78268 0 77910 177 161 16 20 0 8 2
lockfpl 104 3144 0 3141 4 3 1 2 0 8 0
lockfspl 48 1292 0 1289 1 0 1 1 0 8 0
sessionpl 144 331 0 322 1 0 1 1 0 8 0
pgrppl 48 909 0 892 1 0 1 1 0 8 0
ucredpl 104 13396 0 13380 1 0 1 1 0 8 0
zombiepl 144 11098 0 11096 4 3 1 1 0 8 0
processpl 1160 11146 0 11096 8 4 4 6 0 8 0
procpl 648 23254 0 23193 17 11 6 9 0 8 0
srpgc 96 45 0 45 16 16 0 1 0 8 0
sosppl 168 59 0 59 24 23 1 1 0 8 1
sockpl 664 23535 0 23453 249 234 15 23 0 8 8
mcl64k 65536 10 0 0 2 0 2 2 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 7 0 0 1 0 1 1 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 462 0 0 28 5 23 28 0 8 0
mtagpl 96 82 0 0 2 0 2 2 0 8 0
mbufpl 256 1992 0 0 97 0 97 97 0 8 0
bufpl 280 33603 0 25283 664 61 603 659 0 8 0
anonpl 24 1358143 0 1353479 134 76 58 83 0 185 0
amapchunkpl 152 294219 0 293617 132 106 26 36 0 158 1
amappl16 200 22652 0 22610 199 187 12 19 0 8 0
amappl15 192 15 0 15 3 3 0 1 0 8 0
amappl14 184 735 0 723 1 0 1 1 0 8 0
amappl13 176 13 0 13 2 2 0 1 0 8 0
amappl12 168 16508 0 16477 3 1 2 2 0 8 0
amappl11 160 59 0 45 1 0 1 1 0 8 0
amappl10 152 10 0 10 1 1 0 1 0 8 0
amappl9 144 150 0 150 1 1 0 1 0 8 0
amappl8 136 28 0 25 1 0 1 1 0 8 0
amappl7 128 711 0 698 1 0 1 1 0 8 0
amappl6 120 3159 0 3157 1 0 1 1 0 8 0
amappl5 112 1340 0 1328 1 0 1 1 0 8 0
amappl4 104 1237 0 1217 1 0 1 1 0 8 0
amappl3 96 58804 0 58677 4 0 4 4 0 8 0
amappl2 88 4882 0 4815 2 0 2 2 0 8 0
amappl1 80 59960 0 59370 18 4 14 15 0 8 0
amappl 88 88880 0 88672 7 1 6 6 0 92 0
dma65536 65536 1 0 1 1 1 0 1 0 8 0
dma32768 32768 1 0 1 1 1 0 1 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 1 0 1 1 1 0 1 0 8 0
dma1024 1024 71 0 70 1 0 1 1 0 8 0
dma512 512 1 0 1 1 1 0 1 0 8 0
dma256 256 16 0 16 10 10 0 1 0 8 0
dma128 128 254 0 254 2 2 0 1 0 8 0
dma64 64 8 0 8 3 3 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 9 0 2 1 0 1 1 0 8 0
uaddrrnd 24 11153 0 11091 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 11153 0 11091 1 0 1 1 0 8 0
vmmpekpl 168 87996 0 87926 4 0 4 4 0 8 0
vmmpepl 168 666417 0 664442 263 170 93 100 0 357 0
vmsppl 440 11152 0 11091 11 3 8 8 0 8 0
rwobjpl 56 178727 0 168495 169 23 146 148 0 8 0
pdppl 4096 22313 0 22213 536 434 102 107 0 8 2
pvpl 32 34775 0 0 278 3 275 275 0 265 0
pmappl 248 11152 0 11091 5 1 4 4 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1397 0 840 16 0 16 16 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x76c4bee3f20, count: -1
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
x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline]
acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120
comcnputc(800,2c) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(2c) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(2c) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff8308e045) at db_printf+0x9b
fault(ffffffff8303e84b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80002a0c41f0,ffff80002a0c5000) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80002a0c41f0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
end trace frame: 0xffff80002a0c4340, count: 0
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
x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666
acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline]
acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120
comcnputc(800,2c) at comcnputc+0x29b sys/dev/ic/com.c:1269
cnputc(2c) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(2c) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff8308e045) at db_printf+0x9b
fault(ffffffff8303e84b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157
kpageflttrap(ffff80002a0c41f0,ffff80002a0c5000) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290
kerntrap(ffff80002a0c41f0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
memcpy() at memcpy+0x19
ttwrite(ffff800000a5d800,ffff80002a0c48c0,11) at ttwrite+0x7d7 sys/kern/tty.c:1856
spec_write(ffff80002a0c46a0) at spec_write+0x120 sys/kern/spec_vnops.c:302
VOP_WRITE(fffffd8073bcfca8,ffff80002a0c48c0,11,fffffd807f7d33a8) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245
vn_write(fffffd805fc88688,ffff80002a0c48c0,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408
dofilewritev(ffff8000367b7200,6,ffff80002a0c48c0,0,ffff80002a0c4980) at dofilewritev+0x23c sys/kern/sys_generic.c:380
sys_writev(ffff8000367b7200,ffff80002a0c4a30,ffff80002a0c4980) at sys_writev+0xd8 sys/kern/sys_generic.c:327
syscall(ffff80002a0c4a30) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0c4a30) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd9d10dbef40, count: -23