login: uvm_fault(0xffffffff828b3da8, 0xffff80012a2395b0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel page fault
uvm_fault(0xffffffff828b3da8, 0xffff80012a2395b0, 0, 1) -> e
spllower(ffff80002129a000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716
end trace frame: 0xffff8000234a5990, count: 0
ddb{1}> trace
spllower(ffff80002129a000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716
single_thread_check_locked(ffff8000212919b8,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970
userret(ffff8000212919b8) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline]
userret(ffff8000212919b8) at userret+0x335 sys/kern/kern_sig.c:1936
syscall(ffff8000234a5ac0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff8000234a5ac0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73754c5d580, count: -5
ddb{1}> show registers
rdi 0xffff80002129a000
rsi 0x99f
rbp 0xffff8000234a5930
rbx 0x1000 __ALIGN_SIZE
rdx 0xffff80002129a000
rcx 0x99e
rax 0x2129a000
r8 0xffffffff822b4d90 setrunnable+0xa0
r9 0x5
r10 0xa70638e813e5e886
r11 0xf6f54406225e8f8
r12 0xffff800020d68ff0
r13 0x1
r14 0x2129a000
r15 0xffff8000212919b8
rip 0xffffffff81795ab4 spllower+0x34
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000234a58e0
ss 0x10
spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx
ddb{1}> show proc
PROC (syz-executor.0) pid=105890 stat=onproc
flags process=1010<SUGID,SINGLEEXIT> proc=4080000<SUSPSINGLE,THREAD>
pri=32, usrpri=51, nice=20
forw=0xffffffffffffffff, list=0xffff8000211c2a48,0xffffffff828f9680
process=0xffff8000ffff94a8 user=0xffff8000234a0000, vmspace=0xfffffd806ea52b88
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
81531 197657 61023 32767 7 0x3010 syz-executor.0
*81531 105890 61023 32767 7 0x4081010 syz-executor.0
61023 201302 73934 32767 3 0x90 nanosleep syz-executor.0
73934 323678 59157 0 3 0x82 wait syz-executor.0
59157 410050 46451 0 3 0x82 kqread syz-fuzzer
59157 94216 46451 0 3 0x4000082 thrsleep syz-fuzzer
59157 421896 46451 0 3 0x4000082 thrsleep syz-fuzzer
59157 334180 46451 0 3 0x4000082 thrsleep syz-fuzzer
59157 37436 46451 0 3 0x4000082 thrsleep syz-fuzzer
59157 150811 46451 0 3 0x4000082 thrsleep syz-fuzzer
59157 473423 46451 0 3 0x4000082 thrsleep syz-fuzzer
46451 252999 4557 0 3 0x10008a pause ksh
4557 174437 74567 0 3 0x92 select sshd
75695 2300 1 0 3 0x100083 ttyin getty
74567 432040 1 0 3 0x80 select sshd
96188 313621 18362 73 3 0x100090 kqread syslogd
18362 404860 1 0 3 0x100082 netio syslogd
21865 87770 1 77 3 0x100090 poll dhclient
17500 284743 1 0 3 0x80 poll dhclient
69724 399837 0 0 3 0x14200 bored smr
46542 52158 0 0 3 0x14200 pgzero zerothread
80579 212794 0 0 3 0x14200 aiodoned aiodoned
41442 99409 0 0 3 0x14200 syncer update
10583 97729 0 0 3 0x14200 cleaner cleaner
71750 415247 0 0 3 0x14200 reaper reaper
17327 469407 0 0 3 0x14200 pgdaemon pagedaemon
66192 518716 0 0 3 0x14200 bored crynlk
72517 293260 0 0 3 0x14200 bored crypto
79565 282994 0 0 3 0x14200 bored viomb
85310 202814 0 0 3 0x40014200 acpi0 acpi0
72194 263263 0 0 3 0x40014200 idle1
3870 296590 0 0 3 0x14200 bored softnet
72544 66642 0 0 3 0x14200 bored systqmp
21620 462570 0 0 3 0x14200 bored systq
67635 410281 0 0 3 0x40014200 bored softclock
29879 281452 0 0 3 0x40014200 idle0
1 188213 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 81531 (syz-executor.0) thread 0xffff8000212919b8 (105890)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828f9890)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 kpageflttrap+0x23f sys/arch/amd64/amd64/trap.c:277
#2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
#3 alltraps_kern_meltdown+0x7b
#4 spllower+0x34 sys/arch/amd64/amd64/intr.c:716
#5 single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970
#6 userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline]
#6 userret+0x335 sys/kern/kern_sig.c:1936
#7 syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
#7 syscall+0x55c sys/arch/amd64/amd64/trap.c:612
#8 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9472 6346K 6346K 78643K 10562 0
pcb 13 8K 8K 78643K 13 0
rtable 83 2K 2K 78643K 153 0
ifaddr 32 8K 8K 78643K 32 0
counters 41 33K 33K 78643K 41 0
ioctlops 0 0K 2K 78643K 14 0
mount 1 1K 1K 78643K 1 0
vnodes 1199 75K 75K 78643K 1204 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1825 197K 290K 78643K 13109 0
file desc 4 12K 16K 78643K 19 0
proc 48 50K 70K 78643K 325 0
subproc 17 1K 1K 78643K 17 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 22 1K 1K 78643K 22 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
exec 0 0K 2K 78643K 295 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 61 11K 11K 78643K 615 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 6 0K 0K 78643K 6 0
temp 40 3954K 4017K 78643K 1667 0
kqueue 3 4K 4K 78643K 3 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 4 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 17 0 15 1 0 1 1 0 8 0
rtentry 112 34 0 1 1 0 1 1 0 8 0
unpcb 120 23 0 15 1 0 1 1 0 8 0
syncache 296 4 0 4 1 0 1 1 0 8 1
tcpcb 736 10 0 4 1 0 1 1 0 8 0
inpcb 296 28 0 22 1 0 1 1 0 8 0
nd6 48 3 0 0 1 0 1 1 0 8 0
kcovpl 48 1 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 144 0 0 9 0 9 9 0 8 0
art_table 32 145 0 0 2 0 2 2 0 8 0
art_node 16 33 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1412 0 21 87 0 87 87 0 8 0
ffsino 272 1412 0 21 93 0 93 93 0 8 0
nchpl 144 1627 0 36 59 0 59 59 0 8 0
uvmvnodes 72 1438 0 0 27 0 27 27 0 8 0
vnodes 208 1438 0 0 76 0 76 76 0 8 0
namei 1024 3829 0 3829 1 0 1 1 0 8 1
percpumem 16 31 0 0 1 0 1 1 0 8 0
scxspl 216 4776 0 4776 2 1 1 2 0 8 1
plimitpl 152 14 0 7 1 0 1 1 0 8 0
sigapl 424 212 0 182 4 0 4 4 0 8 0
futexpl 56 2 0 2 1 0 1 1 0 8 1
knotepl 112 62 0 50 1 0 1 1 0 8 0
kqueuepl 152 2 0 0 1 0 1 1 0 8 0
pipepl 304 69 0 61 1 0 1 1 0 8 0
fdescpl 496 196 0 182 2 0 2 2 0 8 0
filepl 152 921 0 849 3 0 3 3 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 144 16 0 7 1 0 1 1 0 8 0
pgrppl 48 16 0 7 1 0 1 1 0 8 0
ucredpl 96 51 0 43 1 0 1 1 0 8 0
zombiepl 144 182 0 182 1 0 1 1 0 8 1
processpl 1056 212 0 182 4 1 3 3 0 8 1
procpl 656 219 0 182 4 0 4 4 0 8 0
sockpl 400 68 0 52 2 0 2 2 0 8 0
mcl4k 4096 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 80 0 0 10 0 10 10 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 106 0 0 7 0 7 7 0 8 0
bufpl 280 3445 0 173 234 0 234 234 0 8 0
anonpl 16 22577 0 20233 16 2 14 14 0 124 4
amapchunkpl 152 765 0 664 6 0 6 6 0 158 1
amappl16 192 168 0 100 4 0 4 4 0 8 0
amappl15 184 1 0 1 1 1 0 1 0 8 0
amappl14 176 26 0 18 1 0 1 1 0 8 0
amappl13 168 18 0 16 1 0 1 1 0 8 0
amappl12 160 11 0 9 2 1 1 1 0 8 0
amappl11 152 42 0 33 1 0 1 1 0 8 0
amappl10 144 6 0 2 1 0 1 1 0 8 0
amappl9 136 391 0 390 1 0 1 1 0 8 0
amappl8 128 86 0 70 1 0 1 1 0 8 0
amappl7 120 202 0 196 1 0 1 1 0 8 0
amappl6 112 54 0 46 1 0 1 1 0 8 0
amappl5 104 318 0 303 1 0 1 1 0 8 0
amappl4 96 243 0 220 1 0 1 1 0 8 0
amappl3 88 100 0 92 1 0 1 1 0 8 0
amappl2 80 835 0 776 2 0 2 2 0 8 0
amappl1 72 13177 0 12733 22 4 18 18 0 8 8
amappl 80 417 0 383 1 0 1 1 0 84 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 196 0 182 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 196 0 182 1 0 1 1 0 8 0
vmmpekpl 168 5706 0 5689 1 0 1 1 0 8 0
vmmpepl 168 29861 0 28720 80 7 73 73 0 357 23
vmsppl 368 195 0 182 2 0 2 2 0 8 0
pdppl 4096 399 0 364 47 10 37 37 0 8 2
pvpl 32 108846 0 103608 117 0 117 117 0 265 74
pmappl 232 195 0 182 1 0 1 1 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 267 0 12 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff826c3ff0) 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
__mp_lock(ffffffff828f9688) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828f9688) at __mp_lock+0x122 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff828f9688,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433
sleep_finish(ffff80002349f270,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418
single_thread_set(ffff8000211c2a48,3,0) at single_thread_set+0x3f4 single_thread_wait sys/kern/kern_sig.c:2112 [inline]
single_thread_set(ffff8000211c2a48,3,0) at single_thread_set+0x3f4 sys/kern/kern_sig.c:2092
exit1(ffff8000211c2a48,0,0,1) at exit1+0x98 sys/kern/kern_exit.c:138
sys_exit(ffff8000211c2a48,ffff80002349f3b0,ffff80002349f400) at sys_exit+0x16 sys/kern/kern_exit.c:95
syscall(ffff80002349f480) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002349f480) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2440, count: -12
ddb{0}> machine ddbcpu 1
Stopped at spllower+0x34: movq 0x5c0(%r12,%rax,8),%rbx
ddb{1}> trace
spllower(ffff80002129a000) at spllower+0x34 sys/arch/amd64/amd64/intr.c:716
single_thread_check_locked(ffff8000212919b8,0) at single_thread_check_locked+0x196 sys/kern/kern_sig.c:1970
userret(ffff8000212919b8) at userret+0x335 single_thread_check sys/kern/kern_sig.c:1991 [inline]
userret(ffff8000212919b8) at userret+0x335 sys/kern/kern_sig.c:1936
syscall(ffff8000234a5ac0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff8000234a5ac0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:612
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73754c5d580, count: -5