uvm_fault(0xffffffff8263e320, 0xfffffd0000000018, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel page fault
uvm_fault(0xffffffff8263e320, 0xfffffd0000000018, 0, 1) -> e
tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
end trace frame: 0xffff800023fe3700, count: 0
ddb{1}> trace
tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
spec_read(ffff800023fe3710) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd807b582008,ffff800023fe38c8,10,fffffd807f7bfb40) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd8067080a30,ffff800023fe38c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020ece9d8,f0,ffff800023fe38c8,0,ffff800023fe39b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020ece9d8,ffff800023fe3960,ffff800023fe39b0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023fe3a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023fe3a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc6af40bc1f0, count: -8
ddb{1}> show registers
rdi 0
rsi 0x3da
rbp 0xffff800023fe3650
rbx 0xfffffd0000000000
rdx 0x152
rcx 0xffff8000009d77c0
rax 0xffffffff82194303 tun_dev_read+0x133
r8 0x7f7fffffc000
r9 0x5
r10 0x3b3b29154fba4fcf
r11 0x787b82bed5eb75ea
r12 0
r13 0x3da
r14 0xffff800000a23e60
r15 0xffff800023fe38c8
rip 0xffffffff82194308 tun_dev_read+0x138
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff800023fe35f0
ss 0x10
tun_dev_read+0x138: movl 0x18(%rbx),%r12d
ddb{1}> show proc
PROC (syz-executor.1) pid=486127 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ece768,0xffffffff82693af8
process=0xffff800020ed9b10 user=0xffff800023fde000, vmspace=0xfffffd8068d8e8b0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
17837 148373 60974 0 7 0 syz-executor.1
17837 62721 60974 0 2 0x4000000 syz-executor.1
*17837 486127 60974 0 7 0x4000000 syz-executor.1
23412 190840 83211 0 3 0x80 nanosleep syz-executor.0
23412 408196 83211 0 3 0x4000080 fsleep syz-executor.0
23412 144416 83211 0 3 0x4000080 fsleep syz-executor.0
23412 163544 83211 0 3 0x4000080 fsleep syz-executor.0
73657 302107 1 0 3 0x100083 ttyin getty
23831 417225 0 0 3 0x14200 acct acct
25501 395718 0 0 3 0x14200 bored sosplice
60974 146163 66524 0 3 0x82 nanosleep syz-executor.1
83211 118037 66524 0 3 0x82 nanosleep syz-executor.0
66524 486863 97414 0 3 0x82 thrsleep syz-fuzzer
66524 347489 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 364013 97414 0 3 0x4000082 kqread syz-fuzzer
66524 510507 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 213690 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 106162 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 424282 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 194543 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 370381 97414 0 3 0x4000082 thrsleep syz-fuzzer
66524 72230 97414 0 3 0x4000082 thrsleep syz-fuzzer
97414 410410 96869 0 3 0x10008a pause ksh
96869 475960 56329 0 3 0x92 select sshd
56329 272565 1 0 3 0x80 select sshd
9077 283256 50902 74 3 0x100092 bpf pflogd
50902 477369 1 0 3 0x80 netio pflogd
50342 338152 50330 73 3 0x100090 kqread syslogd
50330 94359 1 0 3 0x100082 netio syslogd
44393 20153 1 77 3 0x100090 poll dhclient
53364 427859 1 0 3 0x80 poll dhclient
14678 397779 0 0 3 0x14200 bored smr
94305 336430 0 0 3 0x14200 pgzero zerothread
36439 140268 0 0 3 0x14200 aiodoned aiodoned
60805 400783 0 0 3 0x14200 syncer update
52698 337734 0 0 3 0x14200 cleaner cleaner
93138 514266 0 0 3 0x14200 reaper reaper
8962 25478 0 0 3 0x14200 pgdaemon pagedaemon
49128 429235 0 0 3 0x14200 bored crynlk
85983 91766 0 0 3 0x14200 bored crypto
40078 138404 0 0 3 0x40014200 acpi0 acpi0
60487 300024 0 0 3 0x40014200 idle1
39497 455015 0 0 3 0x14200 bored softnet
97145 369486 0 0 3 0x14200 bored systqmp
21136 67811 0 0 3 0x14200 bored systq
89195 494953 0 0 3 0x40014200 bored softclock
20263 38932 0 0 3 0x40014200 idle0
1 332417 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 17837 (syz-executor.1) thread 0xffff800020ece9d8 (486127)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82640b58)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 vn_read+0x45 sys/kern/vfs_vnops.c:357
#2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237
#3 sys_read+0x83 sys/kern/sys_generic.c:157
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#5 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9528 6430K 6947K 78643K 12267 0
pcb 13 8K 8K 78643K 151 0
rtable 79 3K 4K 78643K 444 0
ifaddr 83 16K 17K 78643K 210 0
counters 43 33K 34K 78643K 89 0
ioctlops 0 0K 4K 78643K 1512 0
iov 0 0K 18K 78643K 122 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1686 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 14 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 201 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 683 0
sigio 0 0K 0K 78643K 6 0
proc 61 63K 95K 78643K 502 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 72 0
in_multi 57 2K 3K 78643K 150 0
ether_multi 1 0K 0K 78643K 21 0
mrt 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 278 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 135 88K 90K 78643K 3293 0
UVM aobj 28 7K 7K 78643K 32 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 98 0
NDP 13 0K 0K 78643K 44 0
temp 136 3046K 3111K 78643K 8543 0
kqueue 3 4K 10K 78643K 39 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 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 55 0 53 1 0 1 1 0 8 0
rtentry 112 69 0 41 2 0 2 2 0 8 0
unpcb 120 326 0 316 1 0 1 1 0 8 0
syncache 264 13 0 13 4 4 0 1 0 8 0
tcpqe 32 480 0 480 2 2 0 1 0 8 0
tcpcb 544 546 0 542 1 0 1 1 0 8 0
inpcb 280 1696 0 1687 3 1 2 2 0 8 1
rttmr 72 1 0 1 1 1 0 1 0 8 0
nd6 48 10 0 8 1 0 1 1 0 8 0
pkpcb 40 6 0 6 2 2 0 1 0 8 0
ppxss 1128 2 0 2 1 1 0 1 0 8 0
pffrag 232 8 0 8 4 4 0 1 0 482 0
pffrnode 88 8 0 8 4 4 0 1 0 8 0
pffrent 40 145 0 145 4 4 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 94 0 42 1 0 1 1 0 8 0
pfstkey 112 94 0 42 2 0 2 2 0 8 0
pfstate 328 94 0 42 5 0 5 5 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 256 360 0 232 12 2 10 12 0 8 0
art_table 32 361 0 232 2 0 2 2 0 8 0
art_node 16 68 0 45 1 0 1 1 0 8 0
sysvmsgpl 40 30 0 18 2 1 1 1 0 8 0
semapl 112 199 0 189 1 0 1 1 0 8 0
shmpl 112 30 0 4 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2370 0 963 90 1 89 89 0 8 0
ffsino 272 2370 0 963 95 0 95 95 0 8 0
nchpl 144 3515 0 1912 60 0 60 60 0 8 0
uvmvnodes 72 2773 0 0 51 0 51 51 0 8 0
vnodes 208 2773 0 0 146 0 146 146 0 8 0
namei 1024 9808 0 9808 3 2 1 1 0 8 1
percpumem 16 55 0 23 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 15 0 8 3 2 1 1 0 8 0
scxspl 192 10767 0 10767 15 14 1 6 0 8 1
plimitpl 152 78 0 70 1 0 1 1 0 8 0
sigapl 424 901 0 867 4 0 4 4 0 8 0
futexpl 56 11977 0 11974 3 2 1 1 0 8 0
knotepl 112 100 0 81 1 0 1 1 0 8 0
kqueuepl 144 134 0 132 1 0 1 1 0 8 0
pipelkpl 48 166 0 156 1 0 1 1 0 8 0
pipepl 120 332 0 313 1 0 1 1 0 8 0
fdescpl 496 884 0 867 3 0 3 3 0 8 0
filepl 152 5816 0 5714 6 1 5 6 0 8 0
lockfpl 104 164 0 163 1 0 1 1 0 8 0
lockfspl 48 47 0 46 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 25 0 14 1 0 1 1 0 8 0
ucredpl 96 478 0 469 1 0 1 1 0 8 0
zombiepl 144 867 0 867 2 1 1 1 0 8 1
processpl 984 901 0 867 6 1 5 5 0 8 0
procpl 624 2464 0 2416 4 0 4 4 0 8 0
sosppl 128 12 0 12 4 4 0 1 0 8 0
sockpl 400 2083 0 2062 9 5 4 4 0 8 1
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 10 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 12 0 0 2 0 2 2 0 8 0
mcl4k 4096 16 0 0 2 0 2 2 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 235 0 0 29 0 29 29 0 8 0
mtagpl 80 128 0 0 3 0 3 3 0 8 0
mbufpl 256 752 0 0 42 0 42 42 0 8 0
bufpl 280 4919 0 143 342 0 342 342 0 8 0
anonpl 16 101394 0 86087 98 34 64 75 0 124 0
amapchunkpl 152 5459 0 5310 26 20 6 19 0 158 0
amappl16 192 4871 0 4044 74 32 42 52 0 8 0
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 25 0 20 1 0 1 1 0 8 0
amappl13 168 33 0 31 1 0 1 1 0 8 0
amappl12 160 330 0 323 1 0 1 1 0 8 0
amappl11 152 63 0 47 1 0 1 1 0 8 0
amappl10 144 351 0 346 1 0 1 1 0 8 0
amappl9 136 389 0 388 1 0 1 1 0 8 0
amappl8 128 353 0 320 2 0 2 2 0 8 0
amappl7 120 449 0 437 1 0 1 1 0 8 0
amappl6 112 25 0 21 1 0 1 1 0 8 0
amappl5 104 1101 0 1082 1 0 1 1 0 8 0
amappl4 96 509 0 477 1 0 1 1 0 8 0
amappl3 88 121 0 115 1 0 1 1 0 8 0
amappl2 80 6111 0 6032 2 0 2 2 0 8 0
amappl1 72 29083 0 28605 23 13 10 18 0 8 0
amappl 80 2732 0 2680 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 31 0 4 1 0 1 1 0 8 0
uaddrrnd 24 899 0 875 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 899 0 875 1 0 1 1 0 8 0
vmmpekpl 168 10991 0 10958 2 0 2 2 0 8 0
vmmpepl 168 116165 0 114040 134 41 93 105 0 357 0
vmsppl 368 898 0 875 3 0 3 3 0 8 0
pdppl 4096 1806 0 1757 7 0 7 7 0 8 0
pvpl 32 306467 0 288666 213 49 164 180 0 265 18
pmappl 232 898 0 875 4 2 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 310 0 13 9 0 9 9 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff8251cff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff82640950) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82640950) at __mp_lock+0x127 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff82640950) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82640950) at __mp_lock+0x127 sys/kern/kern_lock.c:147
syscall(ffff80002318fae0) at syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline]
syscall(ffff80002318fae0) at syscall+0x400 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe7680, count: -9
ddb{0}> machine ddbcpu 1
Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d
ddb{1}> trace
tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
spec_read(ffff800023fe3710) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd807b582008,ffff800023fe38c8,10,fffffd807f7bfb40) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd8067080a30,ffff800023fe38c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff800020ece9d8,f0,ffff800023fe38c8,0,ffff800023fe39b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff800020ece9d8,ffff800023fe3960,ffff800023fe39b0) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023fe3a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023fe3a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc6af40bc1f0, count: -8