*cpu0: uvm_fault(0xfffffd806c013b60, 0x113a0, 0, 2) -> e
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7f275856c550, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80002a26c430
rbx 0
rdx 0
rcx 0xffff800038fead08
rax 0x3b
r8 0xffff80002a26c360
r9 0x1
r10 0x1fe7d00464f5a7d3
r11 0x4e0cd69ead02e64f
r12 0
r13 0
r14 0xffff800038fead08
r15 0
rip 0xffffffff81e113ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80002a26c3b0
ss 0
savectx+0xae: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=372251 pid=5863 tcnt=4 stat=onproc
flags process=0 proc=0
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c416a68,0xffff800038feb758
process=0xffff80003c41abb8 user=0xffff80002a267000, vmspace=0xfffffd806c013980
estcpu=33, cpticks=0, pctcpu=0.9, user=9, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
99038 18237 95127 0 2 0 syz-executor
99038 429555 95127 0 3 0x4000080 fsleep syz-executor
21822 110174 81659 0 3 0x3000 suspend syz-executor
21822 464933 81659 0 2 0x4081080 syz-executor
21822 512038 81659 0 2 0x4081080 syz-executor
22669 66506 22260 0 2 0 syz-executor
22669 358715 22260 0 3 0x4000080 fsleep syz-executor
94734 298049 0 0 3 0x14200 acct acct
84863 100617 22968 0 2 0xc80 syz-executor
84863 87132 22968 0 3 0x4000080 sbwait syz-executor
84863 98729 22968 0 3 0x4000080 sbwait syz-executor
93370 355956 42570 0 2 0xc80 syz-executor
93370 457499 42570 0 7 0x4000000 syz-executor
93370 407699 42570 0 3 0x4000080 fsleep syz-executor
93370 193797 42570 0 3 0x4000080 fsleep syz-executor
* 5863 372251 63398 0 7 0 syz-executor
5863 486936 63398 0 3 0x4000080 fsleep syz-executor
5863 306756 63398 0 3 0x4000080 lockf syz-executor
5863 239645 63398 0 3 0x4000080 fsleep syz-executor
72259 456427 1 0 3 0x82 nanoslp getty
11631 367647 0 0 3 0x14280 nfsidl nfsio
28920 223742 0 0 3 0x14280 nfsidl nfsio
39021 443734 0 0 3 0x14280 nfsidl nfsio
73125 304629 0 0 3 0x14280 nfsidl nfsio
51589 382243 0 0 3 0x14280 nfsidl nfsio
83665 250690 0 0 3 0x14280 nfsidl nfsio
78476 228732 0 0 3 0x14280 nfsidl nfsio
54078 267748 0 0 3 0x14280 nfsidl nfsio
58884 54013 0 0 3 0x14280 nfsidl nfsio
52667 350166 0 0 3 0x14280 nfsidl nfsio
3534 133194 0 0 3 0x14280 nfsidl nfsio
2983 162819 0 0 3 0x14280 nfsidl nfsio
23937 447415 0 0 3 0x14280 nfsidl nfsio
24572 494106 0 0 3 0x14280 nfsidl nfsio
98913 494109 0 0 3 0x14280 nfsidl nfsio
66993 469222 0 0 3 0x14280 nfsidl nfsio
75852 307722 0 0 3 0x14280 nfsidl nfsio
90588 20403 0 0 3 0x14280 nfsidl nfsio
674 269760 0 0 3 0x14280 nfsidl nfsio
61391 140175 0 0 3 0x14280 nfsidl nfsio
63398 458002 96108 0 2 0xc82 syz-executor
82349 102627 96108 0 3 0x82 wait syz-executor
95127 314562 96108 0 2 0xc82 syz-executor
22260 167316 96108 0 2 0xc82 syz-executor
60885 346879 0 0 3 0x14200 bored sosplice
81659 247106 96108 0 2 0xc82 syz-executor
42570 373397 96108 0 2 0xc82 syz-executor
30419 470372 96108 0 2 0xc82 syz-executor
22968 68514 96108 0 2 0xc82 syz-executor
96108 387173 60618 0 3 0x82 kqread syz-executor
60618 206140 78238 0 3 0x10008a sigsusp ksh
78238 487501 84984 0 3 0x98 kqread sshd-session
84984 203450 19164 0 3 0x92 kqread sshd-session
19164 177659 1 0 3 0x88 kqread sshd
26899 118569 26183 74 3 0x1100092 bpf pflogd
26183 322258 1 0 3 0x80 sbwait pflogd
46694 279005 94199 73 3 0x1100090 kqread syslogd
94199 380888 1 0 3 0x100082 sbwait syslogd
43868 171707 1 0 3 0x100080 kqread resolvd
50210 51870 98122 77 3 0x100092 kqread dhcpleased
79183 166713 98122 77 3 0x100092 kqread dhcpleased
98122 130277 1 0 3 0x80 kqread dhcpleased
20706 194365 0 0 3 0x14200 bored smr
93534 312182 0 0 2 0x14200 zerothread
19643 289888 0 0 3 0x14200 aiodoned aiodoned
75880 469822 0 0 3 0x14200 syncer update
55713 499040 0 0 3 0x14200 cleaner cleaner
26490 44038 0 0 3 0x14200 reaper reaper
7473 209644 0 0 3 0x14200 pgdaemon pagedaemon
4516 393533 0 0 3 0x14200 bored viomb
59201 411770 0 0 3 0x40014200 acpi0 acpi0
67576 140572 0 0 3 0x40014200 idle1
96506 480196 0 0 3 0x14200 bored softnet3
63710 46032 0 0 3 0x14200 bored softnet2
12830 80356 0 0 3 0x14200 bored softnet1
75908 431340 0 0 3 0x14200 bored softnet0
59647 43514 0 0 3 0x14200 bored systqmp
8571 137412 0 0 3 0x14200 bored systq
53836 66661 0 0 3 0x14200 tmoslp softclockmp
37116 189837 0 0 2 0x40014200 softclock
27494 307392 0 0 3 0x40014200 idle0
1 206688 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &sched_lock r = 0 (0xffffffff83944b58)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:301
#2 mtx_enter+0x62 sys/kern/kern_lock.c:258
#3 preempt+0x35 sys/kern/sched_bsd.c:339
#4 ast+0x165 mi_ast sys/sys/syscall_mi.h:252 [inline]
#4 ast+0x165 sys/arch/amd64/amd64/trap.c:543
#5 intr_user_exit+0x3c
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10224 11065K 12881K 166960K 17567 0
pcb 18 15K 17K 166960K 862 0
rtable 200 18K 19K 166960K 814 0
pf 35 17K 20K 166960K 234 0
ifaddr 36 6K 8K 166960K 153 0
ifgroup 55 2K 2K 166960K 277 0
sysctl 4 1K 9K 166960K 29 0
counters 68 36K 37K 166960K 282 0
ioctlops 0 0K 4K 166960K 2158 0
iov 0 0K 32K 166960K 207 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1614 101K 102K 166960K 5250 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 59 0
VM map 2 1K 1K 166960K 2 0
sem 49 2K 2K 166960K 244 0
dirhash 12 2K 3K 166960K 78 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 240K 166960K 2976 0
sigio 0 0K 0K 166960K 51 0
proc 72 91K 128K 166960K 977 0
subproc 72 4K 4K 166960K 108 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 614 0
in_multi 69 4K 7K 166960K 261 0
ether_multi 1 0K 0K 166960K 30 0
mrt 1 0K 0K 166960K 14 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 139 625K 625K 166960K 139 0
exec 0 0K 1K 166960K 941 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 4K 166960K 6 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 276 171K 188K 166960K 28253 0
UVM aobj 37 4K 4K 166960K 39 0
pinsyscall 43 86K 106K 166960K 4191 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 152 0
NDP 12 0K 2K 166960K 109 0
temp 82 8696K 8944K 166960K 135496 0
kqueue 13 20K 32K 166960K 548 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 293 0 289 3 2 1 3 0 8 0
rtentry 176 223 0 144 6 0 6 6 0 8 0
unpcb 144 1935 0 1914 10 8 2 5 0 8 1
syncache 336 12 0 12 2 2 0 1 0 8 0
tcpqe 32 6 0 6 1 1 0 1 0 8 0
tcpcb 736 1181 0 1177 19 16 3 7 0 8 2
arp 128 37 0 22 1 0 1 1 0 8 0
inpcb 328 3317 0 3308 19 12 7 10 0 8 6
nd6 144 44 0 26 2 0 2 2 0 8 0
pkpcb 40 27 0 27 3 2 1 1 0 8 1
kcovpl 48 12 0 4 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 79 0 79 2 1 1 1 0 8 1
pppxif 1504 10 0 10 5 4 1 1 0 8 1
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 16 0 9 1 0 1 1 0 482 0
pffrnode 88 16 0 9 1 0 1 1 0 8 0
pffrent 40 28 0 21 1 0 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
pfstitem 24 176 0 53 1 0 1 1 0 8 0
pfstkey 128 177 0 54 5 0 5 5 0 8 0
pfstate 384 177 0 54 13 0 13 13 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
rttmr 136 2 0 2 2 2 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 962 0 635 33 7 26 32 0 8 3
art_table 32 965 0 635 5 1 4 5 0 8 0
art_node 16 213 0 146 1 0 1 1 0 8 0
sysvmsgpl 40 13 0 8 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 205 0 158 2 0 2 2 0 8 0
shmpl 112 36 0 2 1 0 1 1 0 8 0
dirhash 1024 62 0 45 3 0 3 3 0 8 0
dino2pl 256 7010 0 5493 96 0 96 96 0 8 0
ffsino 288 7010 0 5493 109 0 109 109 0 8 0
nchpl 144 11327 0 10784 64 40 24 64 0 8 0
rtmask 32 12 0 12 3 3 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 41004 0 41004 3 2 1 2 0 8 1
percpumem 16 156 0 107 1 0 1 1 0 8 0
kstatmem 264 174 0 146 5 2 3 3 0 8 1
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 13 0 13 3 2 1 1 0 8 1
scxspl 216 51697 0 51697 14 11 3 8 1 8 3
plimitpl 152 909 0 891 1 0 1 1 0 8 0
sigapl 424 3311 0 3239 11 2 9 9 0 8 0
knotepl 120 590 0 0 17 0 17 17 0 8 0
kqueuepl 224 1335 0 1325 15 12 3 5 0 8 2
pipepl 336 490 0 462 9 6 3 8 0 8 0
fdescpl 520 3246 0 3214 3 0 3 3 0 8 0
filepl 160 23511 0 23279 28 15 13 19 0 8 2
lockfpl 104 1408 0 1403 3 2 1 2 0 8 0
lockfspl 48 559 0 555 1 0 1 1 0 8 0
sessionpl 144 33 0 25 1 0 1 1 0 8 0
pgrppl 48 104 0 88 1 0 1 1 0 8 0
ucredpl 104 3390 0 3376 1 0 1 1 0 8 0
zombiepl 144 3242 0 3239 1 0 1 1 0 8 0
processpl 1240 3311 0 3239 6 0 6 6 0 8 0
procpl 656 8183 0 8099 10 2 8 8 0 8 0
srpgc 96 12 0 12 4 3 1 1 0 8 1
sosppl 168 18 0 18 3 2 1 1 0 8 1
sockpl 728 5714 0 5680 27 18 9 15 0 8 5
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 113 0 0 14 0 14 14 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 30 0 0 4 0 4 4 0 8 0
mtagpl 96 167 0 0 5 0 5 5 0 8 0
mbufpl 256 380 0 0 23 0 23 23 0 8 0
bufpl 280 17412 0 11270 440 0 440 440 0 8 0
anonpl 32 12148 0 0 98 0 98 98 0 246 0
amapchunkpl 152 98145 0 97474 40 8 32 33 0 158 5
amappl16 200 8101 0 7989 62 43 19 28 0 8 8
amappl15 192 9 0 8 1 0 1 1 0 8 0
amappl14 184 132 0 120 1 0 1 1 0 8 0
amappl13 176 7 0 7 2 2 0 1 0 8 0
amappl12 168 3957 0 3925 4 2 2 3 0 8 0
amappl11 160 122 0 108 1 0 1 1 0 8 0
amappl10 152 20 0 20 2 2 0 1 0 8 0
amappl9 144 257 0 256 2 1 1 1 0 8 0
amappl8 136 23 0 20 1 0 1 1 0 8 0
amappl7 128 124 0 111 1 0 1 1 0 8 0
amappl6 120 223 0 219 1 0 1 1 0 8 0
amappl5 112 141 0 131 1 0 1 1 0 8 0
amappl4 104 353 0 332 1 0 1 1 0 8 0
amappl3 96 20435 0 20311 4 0 4 4 0 8 0
amappl2 88 740 0 677 2 0 2 2 0 8 0
amappl1 80 21280 0 20668 15 1 14 15 0 8 0
amappl 88 26975 0 26777 5 0 5 5 0 92 0
dma32768 32768 1 0 1 1 1 0 1 0 8 0
dma8192 8192 2 0 2 2 2 0 1 0 8 0
dma4096 4096 2 0 2 2 2 0 1 0 8 0
dma2048 2048 4 0 4 2 2 0 1 0 8 0
dma1024 1024 2 0 1 1 0 1 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 257 0 257 5 5 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 53 0 52 1 0 1 1 0 8 0
aobjpl 72 38 0 2 1 0 1 1 0 8 0
uaddrrnd 24 3246 0 3214 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3246 0 3214 1 0 1 1 0 8 0
vmmpekpl 168 25617 0 25569 3 0 3 3 0 8 0
vmmpepl 168 204507 0 202335 118 14 104 112 0 357 3
vmsppl 480 3245 0 3214 5 0 5 5 0 8 0
rwobjpl 72 55455 0 48433 133 1 132 133 0 8 2
pdppl 4096 6499 0 6428 117 46 71 85 0 8 0
pvpl 32 20922 0 0 169 0 169 169 0 265 0
pmappl 256 3245 0 3214 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 452 0 89 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83867ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
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_1(800,70) at x86_bus_space_io_read_1
cnputc(70) at cnputc+0x61 sys/dev/cons.c:218
kputchar(70,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
printf(ffffffff834514e5) at printf+0x8b sys/kern/subr_prf.c:529
trap_print(ffff80003c426c10,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457
kerntrap(ffff80003c426c10) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80003c427060) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c427060) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa1a1d74dee0, count: 1
ddb{0}> trace
x86_ipi_db(ffffffff83867ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
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_1(800,70) at x86_bus_space_io_read_1
cnputc(70) at cnputc+0x61 sys/dev/cons.c:218
kputchar(70,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
printf(ffffffff834514e5) at printf+0x8b sys/kern/subr_prf.c:529
trap_print(ffff80003c426c10,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457
kerntrap(ffff80003c426c10) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80003c427060) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c427060) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa1a1d74dee0, count: -14
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7f275856c550, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7f275856c550, count: -1