uvm_fault(fffffd806a5d7a20,20001000,0,2) at uvm_fault+0x23e sys/uvm/uvm_fault.c:628
kpageflttrap(ffff8000216b1520,20001280) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000216b1520) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x53
syscall(ffff8000216b1750) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000216b1750) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc34d0bbf460, count: -15
ddb{0}> show registers
rdi 0xffff8000254d0000
rsi 0x3af9 __ALIGN_SIZE+0x2af9
rbp 0xffff8000216b0ea0
rbx 0x3
rdx 0xffff8000254d0000
rcx 0x3af8 __ALIGN_SIZE+0x2af8
rax 0xffffffff82097e57 db_enter+0x17
r8 0xffffffff81631b01 witness_checkorder+0x1061
r9 0x5
r10 0xbbf44ddc8e0b4323
r11 0xadf1c5b96a28970c
r12 0
r13 0xfffffd806b004098
r14 0
r15 0xfffffd8002ce0600
rip 0xffffffff82097e58 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000216b0e90
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=117733 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=78, nice=20
forw=0xffffffffffffffff, list=0xffff800021279500,0xffff800021279a50
process=0xffff800024325968 user=0xffff8000216ac000, vmspace=0xfffffd806a5d7a20
estcpu=28, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
88884 430823 48550 0 2 0 syz-executor.0
*88884 117733 48550 0 7 0x4000000 syz-executor.0
88884 388810 48550 0 3 0x4000080 fsleep syz-executor.0
20171 281086 51672 0 7 0 syz-executor.1
20171 148311 51672 0 3 0x4000080 piperd syz-executor.1
20171 153603 51672 0 2 0x4000080 syz-executor.1
48550 523663 72106 0 3 0x82 nanoslp syz-executor.0
51672 368341 72106 0 3 0x82 nanoslp syz-executor.1
61965 85854 0 0 3 0x14280 nfsidl nfsio
99363 498354 0 0 3 0x14280 nfsidl nfsio
90621 347129 0 0 3 0x14280 nfsidl nfsio
81605 31688 0 0 3 0x14280 nfsidl nfsio
87081 292716 0 0 3 0x14280 nfsidl nfsio
99128 19183 0 0 3 0x14280 nfsidl nfsio
34956 240102 0 0 3 0x14280 nfsidl nfsio
51987 443279 0 0 3 0x14280 nfsidl nfsio
64284 411183 0 0 3 0x14280 nfsidl nfsio
91327 5783 0 0 3 0x14280 nfsidl nfsio
28942 145084 0 0 3 0x14280 nfsidl nfsio
41489 449929 0 0 3 0x14280 nfsidl nfsio
52492 126999 0 0 3 0x14280 nfsidl nfsio
56313 98994 0 0 3 0x14280 nfsidl nfsio
89296 108818 0 0 3 0x14280 nfsidl nfsio
38434 83316 0 0 3 0x14280 nfsidl nfsio
67901 388418 0 0 3 0x14280 nfsidl nfsio
95249 378646 0 0 3 0x14280 nfsidl nfsio
56410 344539 0 0 3 0x14280 nfsidl nfsio
3203 510499 0 0 3 0x14280 nfsidl nfsio
66883 227273 0 0 3 0x14200 bored sosplice
72106 25293 81427 0 3 0x82 thrsleep syz-fuzzer
72106 330148 81427 0 3 0x4000082 thrsleep syz-fuzzer
72106 504916 81427 0 3 0x4000082 thrsleep syz-fuzzer
72106 108554 81427 0 3 0x4000082 kqread syz-fuzzer
72106 43697 81427 0 3 0x4000082 thrsleep syz-fuzzer
72106 116981 81427 0 3 0x4000082 thrsleep syz-fuzzer
72106 316638 81427 0 3 0x4000082 thrsleep syz-fuzzer
72106 401205 81427 0 3 0x4000082 thrsleep syz-fuzzer
81427 412776 76747 0 3 0x10008a sigsusp ksh
76747 206314 66228 0 3 0x92 select sshd
55318 33353 1 0 3 0x100083 ttyin getty
66228 337475 1 0 3 0x80 select sshd
64375 177881 15102 74 3 0x100092 bpf pflogd
15102 146327 1 0 3 0x80 netio pflogd
38771 255499 66832 73 3 0x100090 kqread syslogd
66832 249485 1 0 3 0x100082 netio syslogd
51711 263748 1 77 3 0x100090 poll dhclient
12519 319126 1 0 3 0x80 poll dhclient
92742 163401 0 0 3 0x14200 bored smr
21382 354889 0 0 2 0x14200 zerothread
27016 27274 0 0 3 0x14200 aiodoned aiodoned
90147 159719 0 0 3 0x14200 syncer update
18588 477311 0 0 3 0x14200 cleaner cleaner
73276 30628 0 0 3 0x14200 reaper reaper
5804 519314 0 0 3 0x14200 pgdaemon pagedaemon
62851 198583 0 0 3 0x14200 bored crynlk
81906 236235 0 0 3 0x14200 bored crypto
14621 213278 0 0 3 0x14200 bored viomb
59948 253586 0 0 3 0x40014200 acpi0 acpi0
56659 96095 0 0 3 0x40014200 idle1
68763 501603 0 0 3 0x14200 bored softnet
50314 291239 0 0 3 0x14200 bored systqmp
11622 369138 0 0 3 0x14200 bored systq
75909 120024 0 0 3 0x40014200 bored softclock
65274 154637 0 0 3 0x40014200 idle0
1 193897 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 88884 (syz-executor.0) thread 0xffff8000212797a0 (117733)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff827d30c8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 kpageflttrap+0x1f1 sys/arch/amd64/amd64/trap.c:265
#2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
#3 alltraps_kern_meltdown+0x7b
#4 copyout+0x53
#5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#6 Xsyscall+0x128
exclusive rwlock fdlock r = 0 (0xfffffd807ccb2638)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 dopipe+0xe0
#2 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#3 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9572 6474K 7338K 78643K 21273 0
pcb 13 8K 8K 78643K 513 0
rtable 108 3K 4K 78643K 1489 0
ifaddr 90 17K 17K 78643K 433 0
sysctl 2 0K 0K 78643K 10 0
counters 46 34K 34K 78643K 168 0
ioctlops 0 0K 4K 78643K 1762 0
iov 0 0K 32K 78643K 475 0
mount 1 1K 1K 78643K 1 0
vnodes 1235 78K 78K 78643K 4835 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 74 0
VM map 2 1K 1K 78643K 2 0
sem 11 1K 1K 78643K 13 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 6 17K 25K 78643K 9475 0
sigio 0 0K 0K 78643K 10 0
proc 63 63K 95K 78643K 1429 0
subproc 32 2K 2K 78643K 187 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 648 0
in_multi 33 2K 2K 78643K 559 0
ether_multi 1 0K 0K 78643K 81 0
mrt 0 0K 0K 78643K 110 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 61 281K 281K 78643K 61 0
exec 0 0K 2K 78643K 849 0
pfkey data 0 0K 0K 78643K 15 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 206 111K 126K 78643K 22939 0
UVM aobj 93 8K 8K 78643K 97 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 361 0
NDP 17 0K 0K 78643K 148 0
temp 151 3975K 4102K 78643K 37676 0
kqueue 3 4K 16K 78643K 341 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 26 0 20 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 356 0 354 1 0 1 1 0 8 0
rtentry 112 314 0 270 2 0 2 2 0 8 0
unpcb 120 1837 0 1823 2 0 2 2 0 8 1
syncache 296 98 0 98 14 14 0 1 0 8 0
tcpqe 32 18 0 18 5 5 0 1 0 8 0
tcpcb 736 1343 0 1337 24 22 2 4 0 8 0
inpcb 304 3971 0 3963 10 8 2 2 0 8 1
rttmr 72 46 0 46 8 7 1 1 0 8 1
nd6 48 83 0 77 1 0 1 1 0 8 0
pkpcb 40 102 0 102 14 13 1 1 0 8 1
kcovpl 48 11 0 9 1 0 1 1 0 8 0
swfcl 56 4 0 0 1 0 1 1 0 8 0
ppxss 1128 11 0 11 5 5 0 1 0 8 0
pffrag 232 9 0 9 2 1 1 1 0 482 1
pffrnode 88 9 0 9 2 1 1 1 0 8 1
pffrent 40 22 0 22 2 1 1 1 0 8 1
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 0 145 1 0 1 1 0 8 0
pfstkey 112 176 0 145 2 1 1 2 0 8 0
pfstate 320 176 0 145 6 2 4 4 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 937 0 746 18 6 12 14 0 8 0
art_table 32 938 0 746 2 0 2 2 0 8 0
art_node 16 298 0 258 1 0 1 1 0 8 0
semapl 112 9 0 0 1 0 1 1 0 8 0
shmpl 112 94 0 4 3 0 3 3 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 13419 0 12008 92 3 89 89 0 8 0
ffsino 272 13419 0 12008 95 0 95 95 0 8 0
nchpl 144 24676 0 23081 60 0 60 60 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 61211 0 61211 2 1 1 1 0 8 1
percpumem 16 95 0 61 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 24 0 17 3 2 1 1 0 8 0
scxspl 216 81364 0 81364 15 14 1 8 0 8 1
plimitpl 152 137 0 129 1 0 1 1 0 8 0
sigapl 424 9686 0 9632 7 0 7 7 0 8 0
futexpl 56 61399 0 61398 2 1 1 1 0 8 0
knotepl 112 639 0 619 1 0 1 1 0 8 0
kqueuepl 168 3424 0 3418 1 0 1 1 0 8 0
pipepl 336 567 0 553 6 4 2 2 0 8 0
fdescpl 496 9648 0 9631 3 0 3 3 0 8 0
filepl 152 30994 0 30886 7 1 6 6 0 8 1
lockfpl 104 1579 0 1577 1 0 1 1 0 8 0
lockfspl 48 546 0 544 1 0 1 1 0 8 0
sessionpl 144 27 0 16 1 0 1 1 0 8 0
pgrppl 48 38 0 27 1 0 1 1 0 8 0
ucredpl 96 3351 0 3340 1 0 1 1 0 8 0
zombiepl 144 9632 0 9632 1 0 1 1 0 8 1
processpl 1080 9686 0 9632 4 0 4 4 0 8 0
procpl 672 21534 0 21469 8 2 6 6 0 8 0
sosppl 168 138 0 137 10 9 1 1 0 8 0
sockpl 432 6271 0 6247 19 11 8 8 0 8 4
mcl64k 65536 28 0 0 3 0 3 3 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 14 0 0 2 0 2 2 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 10 0 0 2 0 2 2 0 8 0
mcl4k 4096 19 0 0 3 1 2 3 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 361 0 0 16 1 15 16 0 8 0
mtagpl 96 390 0 0 8 0 8 8 0 8 0
mbufpl 256 1020 0 0 48 0 48 48 0 8 0
bufpl 280 22572 0 16312 448 0 448 448 0 8 0
anonpl 24 682868 0 675788 98 45 53 67 0 186 9
amapchunkpl 152 39303 0 39105 49 41 8 22 0 158 0
amappl16 200 31218 0 30968 42 25 17 26 0 8 3
amappl15 192 2513 0 2511 1 0 1 1 0 8 0
amappl14 184 3 0 2 1 0 1 1 0 8 0
amappl13 176 2857 0 2853 1 0 1 1 0 8 0
amappl12 168 2707 0 2701 1 0 1 1 0 8 0
amappl11 160 46 0 33 1 0 1 1 0 8 0
amappl10 152 32 0 24 1 0 1 1 0 8 0
amappl9 144 860 0 859 1 0 1 1 0 8 0
amappl8 136 695 0 580 4 0 4 4 0 8 0
amappl7 128 668 0 657 1 0 1 1 0 8 0
amappl6 120 112 0 94 1 0 1 1 0 8 0
amappl5 112 5327 0 5315 1 0 1 1 0 8 0
amappl4 104 3408 0 3362 3 1 2 2 0 8 0
amappl3 96 4494 0 4480 1 0 1 1 0 8 0
amappl2 88 78449 0 78368 3 0 3 3 0 8 0
amappl1 80 279061 0 278546 26 14 12 21 0 8 0
amappl 88 21975 0 21908 2 0 2 2 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 64 96 0 4 2 0 2 2 0 8 0
uaddrrnd 24 9672 0 9648 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 9672 0 9648 1 0 1 1 0 8 0
vmmpekpl 168 44224 0 44186 2 0 2 2 0 8 0
vmmpepl 168 1198305 0 1196604 124 48 76 84 0 357 1
vmsppl 368 9671 0 9648 3 0 3 3 0 8 0
rwobjpl 56 252056 0 250995 34 18 16 19 0 8 1
pdppl 4096 19351 0 19303 69 21 48 49 0 8 0
pvpl 32 3051429 0 3040944 261 155 106 121 0 265 20
pmappl 232 9671 0 9648 4 2 2 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 391 0 62 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
witness_checkorder(fffffd806b004098,9,0) at witness_checkorder+0x108b
rw_enter(fffffd806b004088,81) at rw_enter+0xd4
rrw_enter(fffffd806b004088,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:461
VOP_LOCK(fffffd807c57b8c8,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd807c57b8c8,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
uvn_get(fffffd80676b38d0,0,ffff8000216b1228,ffff8000216b120c,0,0) at uvn_get+0x276 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
uvn_get(fffffd80676b38d0,0,ffff8000216b1228,ffff8000216b120c,0,0) at uvn_get+0x276 sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff8000216b1390,ffff8000216b13c8,ffff8000216b1310,0) at uvm_fault_lower+0x54d sys/uvm/uvm_fault.c:1213
uvm_fault(fffffd806a5d7a20,20001000,0,2) at uvm_fault+0x23e sys/uvm/uvm_fault.c:628
kpageflttrap(ffff8000216b1520,20001280) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000216b1520) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x53
syscall(ffff8000216b1750) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000216b1750) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc34d0bbf460, count: -15
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0x7f7fffffae60, count: -3