ukernel: 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(0xffffffff82797368, 0xfffffd0000000018, 0, 1) -> e
tun_dev_read(5d01,ffff800023fa7118,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
end trace frame: 0xffff800023fa6f50, count: 0
ddb{1}> trace
tun_dev_read(5d01,ffff800023fa7118,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
spec_read(ffff800023fa6f60) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e36d348,ffff800023fa7118,10,fffffd807f7bf780) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd80679f04e0,ffff800023fa7118,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff8000230ed3b0,f0,ffff800023fa7118,0,ffff800023fa7200) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff8000230ed3b0,ffff800023fa71b0,ffff800023fa7200) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023fa7280) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023fa7280) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeaee8ff6f80, count: -8
ddb{1}> show registers
rdi 0
rsi 0x3da
rbp 0xffff800023fa6ea0
rbx 0xfffffd0000000000
rdx 0x4d5
rcx 0xffff800000adde40
rax 0xffffffff81375ca3 tun_dev_read+0x133
r8 0x7f7fffffc000
r9 0x5
r10 0x23809567fd5afb8c
r11 0x743016acd2050cbe
r12 0
r13 0x3da
r14 0xffff800000b52660
r15 0xffff800023fa7118
rip 0xffffffff81375ca8 tun_dev_read+0x138
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff800023fa6e40
ss 0x10
tun_dev_read+0x138: movl 0x18(%rbx),%r12d
ddb{1}> show proc
PROC (syz-executor.1) pid=191945 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000230ed140,0xffffffff829081f8
process=0xffff800023f16f98 user=0xffff800023fa2000, vmspace=0xfffffd8064cbdba0
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
75210 504362 63127 0 2 0 syz-executor.1
75210 115140 63127 0 2 0x4000000 syz-executor.1
*75210 191945 63127 0 7 0x4000000 syz-executor.1
28164 24580 0 0 3 0x14280 nfsidl nfsio
65754 360487 0 0 3 0x14280 nfsidl nfsio
79006 365004 0 0 3 0x14280 nfsidl nfsio
59736 183093 0 0 3 0x14280 nfsidl nfsio
75704 98497 0 0 3 0x14280 nfsidl nfsio
23160 373942 0 0 3 0x14280 nfsidl nfsio
97250 434329 0 0 3 0x14280 nfsidl nfsio
51221 226021 0 0 3 0x14280 nfsidl nfsio
75536 327297 0 0 3 0x14280 nfsidl nfsio
88095 503270 0 0 3 0x14280 nfsidl nfsio
7885 387051 0 0 3 0x14280 nfsidl nfsio
25299 224379 0 0 3 0x14280 nfsidl nfsio
35257 43144 0 0 3 0x14280 nfsidl nfsio
63954 406229 0 0 3 0x14280 nfsidl nfsio
89134 242207 0 0 3 0x14280 nfsidl nfsio
45278 232814 0 0 3 0x14280 nfsidl nfsio
76072 283766 0 0 3 0x14280 nfsidl nfsio
94608 63343 0 0 3 0x14280 nfsidl nfsio
84363 125824 0 0 3 0x14280 nfsidl nfsio
32421 418776 0 0 3 0x14280 nfsidl nfsio
63127 261152 78700 0 3 0x82 nanosleep syz-executor.1
93534 116944 0 0 3 0x14200 bored sosplice
47312 192666 78700 0 3 0x82 piperd syz-executor.0
78700 325607 45368 0 7 0x2 syz-fuzzer
78700 55591 45368 0 3 0x4000082 nanosleep syz-fuzzer
78700 409129 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 338942 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 424341 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 444928 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 466730 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 185169 45368 0 3 0x4000082 thrsleep syz-fuzzer
78700 104200 45368 0 3 0x4000082 kqread syz-fuzzer
78700 329427 45368 0 3 0x4000082 thrsleep syz-fuzzer
45368 394086 19078 0 3 0x10008a pause ksh
19078 181076 83596 0 3 0x92 select sshd
36135 11302 1 0 3 0x100083 ttyin getty
83596 356570 1 0 3 0x80 select sshd
31476 420960 41617 74 3 0x100092 bpf pflogd
41617 396514 1 0 3 0x80 netio pflogd
39889 130430 29861 73 3 0x100090 kqread syslogd
29861 65760 1 0 3 0x100082 netio syslogd
55043 452972 1 77 3 0x100090 poll dhclient
43173 473476 1 0 3 0x80 poll dhclient
78145 119822 0 0 3 0x14200 bored smr
34329 77606 0 0 2 0x14200 zerothread
94430 405916 0 0 3 0x14200 aiodoned aiodoned
60163 483403 0 0 3 0x14200 syncer update
92530 62740 0 0 3 0x14200 cleaner cleaner
14764 73772 0 0 3 0x14200 reaper reaper
46576 195001 0 0 3 0x14200 pgdaemon pagedaemon
8397 505697 0 0 3 0x14200 bored crynlk
18251 127498 0 0 3 0x14200 bored crypto
75790 291530 0 0 3 0x40014200 acpi0 acpi0
1747 472474 0 0 3 0x40014200 idle1
34800 23483 0 0 3 0x14200 bored softnet
47187 116219 0 0 3 0x14200 bored systqmp
36767 522717 0 0 3 0x14200 bored systq
74625 217897 0 0 3 0x40014200 bored softclock
4585 447162 0 0 3 0x40014200 idle0
1 272887 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 75210 (syz-executor.1) thread 0xffff8000230ed3b0 (191945)
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f4e08)
#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 9539 6433K 6797K 78643K 11628 0
pcb 13 8K 8K 78643K 467 0
rtable 94 12K 15K 78643K 648 0
ifaddr 91 17K 19K 78643K 241 0
counters 43 33K 34K 78643K 69 0
ioctlops 0 0K 4K 78643K 1605 0
iov 0 0K 16K 78643K 81 0
mount 1 1K 1K 78643K 1 0
vnodes 1225 77K 77K 78643K 1624 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 18 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 72 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 1018 0
sigio 0 0K 0K 78643K 5 0
proc 61 63K 83K 78643K 536 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 383 0
in_multi 78 3K 3K 78643K 691 0
ether_multi 1 0K 0K 78643K 240 0
mrt 0 0K 0K 78643K 15 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 67 307K 307K 78643K 67 0
exec 0 0K 1K 78643K 275 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 141 137K 153K 78643K 3956 0
UVM aobj 39 2K 2K 78643K 42 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 721 0
NDP 14 0K 0K 78643K 42 0
temp 140 3858K 3924K 78643K 17677 0
kqueue 3 4K 18K 78643K 69 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 14 0 6 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 61 0 59 1 0 1 1 0 8 0
rtentry 112 100 0 67 2 0 2 2 0 8 0
unpcb 120 529 0 519 2 1 1 2 0 8 0
syncache 264 10 0 10 3 2 1 1 0 8 1
tcpqe 32 610 0 610 1 1 0 1 0 8 0
tcpcb 544 970 0 966 1 0 1 1 0 8 0
inpcb 280 2166 0 2159 5 4 1 2 0 8 0
rttmr 72 4 0 4 1 1 0 1 0 8 0
nd6 48 22 0 19 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
pfstscr 40 2 0 0 1 0 1 1 0 8 0
pffrag 232 3 0 2 3 2 1 1 0 482 0
pffrnode 88 3 0 2 3 2 1 1 0 8 0
pffrent 40 48 0 47 3 2 1 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
pfrktable 1344 68 0 66 1 0 1 1 0 8 0
pftag 88 4 0 4 1 1 0 1 0 8 0
pfstitem 24 49 0 42 1 0 1 1 0 8 0
pfstkey 112 49 0 42 2 0 2 2 0 8 0
pfstate 328 48 0 42 3 0 3 3 0 8 1
pfrule 1360 42 0 30 3 1 2 2 0 8 1
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 432 0 252 15 2 13 13 0 8 0
art_table 32 433 0 252 2 0 2 2 0 8 0
art_node 16 98 0 70 1 0 1 1 0 8 0
sysvmsgpl 40 23 0 18 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 66 0 56 1 0 1 1 0 8 0
shmpl 112 40 0 4 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 2751 0 1347 89 0 89 89 0 8 0
ffsino 272 2751 0 1347 97 2 95 95 0 8 0
nchpl 144 4578 0 2956 61 0 61 61 0 8 0
uvmvnodes 72 3067 0 0 56 0 56 56 0 8 0
vnodes 208 3067 0 0 162 0 162 162 0 8 0
namei 1024 14294 0 14294 5 4 1 1 0 8 1
percpumem 16 45 0 13 1 0 1 1 0 8 0
vcpupl 1984 8 0 0 1 0 1 1 0 8 0
vmpool 560 15 0 7 1 0 1 1 0 8 0
pfiaddrpl 120 19 0 16 1 0 1 1 0 8 0
scxspl 192 13131 0 13131 13 12 1 7 0 8 1
plimitpl 152 94 0 86 1 0 1 1 0 8 0
sigapl 424 1252 0 1200 6 0 6 6 0 8 0
futexpl 56 18114 0 18114 4 3 1 1 0 8 1
knotepl 112 144 0 125 1 0 1 1 0 8 0
kqueuepl 144 150 0 148 1 0 1 1 0 8 0
pipelkpl 48 206 0 196 1 0 1 1 0 8 0
pipepl 120 412 0 393 1 0 1 1 0 8 0
fdescpl 496 1215 0 1199 3 0 3 3 0 8 0
filepl 152 8320 0 8220 7 2 5 5 0 8 1
lockfpl 104 174 0 173 1 0 1 1 0 8 0
lockfspl 48 63 0 62 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 23 0 12 1 0 1 1 0 8 0
ucredpl 96 703 0 694 1 0 1 1 0 8 0
zombiepl 144 1200 0 1200 3 2 1 1 0 8 1
processpl 984 1252 0 1200 8 1 7 7 0 8 0
procpl 624 3113 0 3050 7 1 6 6 0 8 0
sosppl 128 13 0 13 3 2 1 1 0 8 1
sockpl 400 2758 0 2739 12 8 4 5 0 8 2
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 10 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 236 0 0 29 0 29 29 0 8 0
mtagpl 80 55 0 0 2 0 2 2 0 8 0
mbufpl 256 557 0 0 29 0 29 29 0 8 0
bufpl 280 5355 0 133 373 0 373 373 0 8 0
anonpl 16 122951 0 106608 95 28 67 80 0 124 1
amapchunkpl 152 7100 0 6968 35 16 19 19 0 158 12
amappl16 192 5394 0 4496 72 26 46 55 0 8 1
amappl15 184 186 0 184 1 0 1 1 0 8 0
amappl14 176 33 0 29 1 0 1 1 0 8 0
amappl13 168 606 0 599 1 0 1 1 0 8 0
amappl12 160 6 0 4 2 1 1 1 0 8 0
amappl11 152 245 0 228 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 888 0 886 1 0 1 1 0 8 0
amappl8 128 861 0 830 2 0 2 2 0 8 0
amappl7 120 125 0 112 1 0 1 1 0 8 0
amappl6 112 29 0 24 1 0 1 1 0 8 0
amappl5 104 822 0 806 1 0 1 1 0 8 0
amappl4 96 796 0 760 1 0 1 1 0 8 0
amappl3 88 420 0 412 1 0 1 1 0 8 0
amappl2 80 8903 0 8828 2 0 2 2 0 8 0
amappl1 72 33791 0 33344 23 13 10 18 0 8 0
amappl 80 3374 0 3322 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 41 0 3 1 0 1 1 0 8 0
uaddrrnd 24 1230 0 1206 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1230 0 1206 1 0 1 1 0 8 0
vmmpekpl 168 12260 0 12222 2 0 2 2 0 8 0
vmmpepl 168 150361 0 148285 155 63 92 122 0 357 1
vmsppl 368 1229 0 1206 5 2 3 3 0 8 0
pdppl 4096 2467 0 2420 9 2 7 7 0 8 1
pvpl 32 358264 0 338672 226 62 164 193 0 265 6
pmappl 232 1229 0 1206 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 312 0 24 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(ffffffff826f1ff0) 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(ffffffff828f4c00) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828f4c00) at __mp_lock+0x127 sys/kern/kern_lock.c:147
intr_handler(ffff800020e7d260,ffff80000065ad80) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532
Xintr_ioapic_edge4_untramp() at Xintr_ioapic_edge4_untramp+0x19f
end of kernel
end trace frame: 0xc0034ccc58, count: -6
ddb{0}> machine ddbcpu 1
Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d
ddb{1}> trace
tun_dev_read(5d01,ffff800023fa7118,10) at tun_dev_read+0x138 sys/net/if_tun.c:790
spec_read(ffff800023fa6f60) at spec_read+0xf1 sys/kern/spec_vnops.c:222
VOP_READ(fffffd806e36d348,ffff800023fa7118,10,fffffd807f7bf780) at VOP_READ+0xbf sys/kern/vfs_vops.c:247
vn_read(fffffd80679f04e0,ffff800023fa7118,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375
dofilereadv(ffff8000230ed3b0,f0,ffff800023fa7118,0,ffff800023fa7200) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff8000230ed3b0,ffff800023fa71b0,ffff800023fa7200) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff800023fa7280) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023fa7280) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeaee8ff6f80, count: -8