kernel: protection fault trap, code=0
Stopped at icmp_mtudisc_timeout+291: movq 0(%rax),%rcx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
icmp_mtudisc_timeout(fffffd806b7d9220,0) at icmp_mtudisc_timeout+291
rt_timer_queue_flush(ffffffff839920f8) at rt_timer_queue_flush+653
ip_sysctl(ffff80002a362bec,1,0,ffff80002a362c18,200000001300,4) at ip_sysctl+2125
net_sysctl(ffff80002a362be4,3,0,ffff80002a362c18,200000001300,4,4fc739380812767b) at net_sysctl+1614
sys_sysctl(ffff80003c42c028,ffff80002a362d50,ffff80002a362ca0) at sys_sysctl+997
syscall(ffff80002a362d50) at syscall+3028
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0xeefae5174f0, count: -7
ddb{0}> show registers
rdi 20
rsi 20
rbp 18446603336929389088
rbx 18446603336929389057
rdx 18446603336242663872
rcx 18446603337232203816
rax 7527431376043171465
r8 18446744071590299072 tcp_mtudisc_increase
r9 0
r10 7036638950363239886
r11 15110371126199137147
r12 18446603336221399128
r13 20
r14 0
r15 18446741326733873696
rip 18446744071610789011 icmp_mtudisc_timeout+291
cs 8
rflags 66118 __ALIGN_SIZE+62022
rsp 18446603336929389008
ss 16
icmp_mtudisc_timeout+291: movq 0(%rax),%rcx
ddb{0}> show proc
PROC (syz-executor) tid=387870 pid=80546 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c42d250,0xffffffff8389d358
process=0xffff8000fffeb510 user=0xffff80002a35d000, vmspace=0xfffffd806c00fd78
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80546 2289 64223 0 2 0 syz-executor
*80546 387870 64223 0 7 0x4000000 syz-executor
57887 93725 95997 60929 2 0x10 syz-executor
57887 168501 95997 60929 2 0x4000010 syz-executor
22175 477951 97373 0 3 0x80 nanoslp syz-executor
22175 449834 97373 0 3 0x4000080 netcon syz-executor
22175 295547 97373 0 3 0x4000080 fsleep syz-executor
74292 102834 79901 0 2 0 syz-executor
74292 5094 79901 0 3 0x4000080 fsleep syz-executor
28915 8574 4593 0 2 0 syz-executor
28915 482091 4593 0 3 0x4000080 fsleep syz-executor
28915 72289 4593 0 3 0x4000080 fsleep syz-executor
28915 313323 4593 0 3 0x4000080 fsleep syz-executor
28915 181084 4593 0 3 0x4000080 fsleep syz-executor
28915 61356 4593 0 3 0x4000080 fsleep syz-executor
6277 309965 27269 0 3 0x3000 suspend syz-executor
6277 90946 27269 0 2 0x4081000 syz-executor
55902 377092 0 0 3 0x14200 acct acct
95997 522297 79562 0 3 0x82 nanoslp syz-executor
64223 250856 79562 0 3 0x82 nanoslp syz-executor
79901 173112 79562 0 3 0x82 nanoslp syz-executor
97373 454666 79562 0 3 0x82 nanoslp syz-executor
4593 84145 79562 0 3 0x82 nanoslp syz-executor
27269 49654 79562 0 3 0x82 nanoslp syz-executor
65075 116879 1 0 3 0x100083 ttyin getty
42494 28306 79562 0 3 0x82 nanoslp syz-executor
89647 111487 79562 0 3 0x82 wait syz-executor
79562 422729 86929 0 3 0x82 kqread syz-executor
86929 286048 14462 0 3 0x10008a sigsusp ksh
14462 415216 6935 0 3 0x98 kqread sshd-session
6935 417778 81691 0 3 0x92 kqread sshd-session
81691 481642 1 0 3 0x88 kqread sshd
27882 82823 43278 74 3 0x1100092 bpf pflogd
43278 52940 1 0 3 0x80 sbwait pflogd
36291 16798 55156 73 3 0x1100090 kqread syslogd
55156 132856 1 0 3 0x100082 sbwait syslogd
17062 147021 1 0 3 0x100080 kqread resolvd
72491 10902 60491 77 3 0x100092 kqread dhcpleased
84899 178184 60491 77 3 0x100092 kqread dhcpleased
60491 175840 1 0 3 0x80 kqread dhcpleased
15043 109594 0 0 3 0x14200 bored smr
18176 166892 0 0 2 0x14200 zerothread
50074 459978 0 0 3 0x14200 aiodoned aiodoned
45539 382016 0 0 3 0x14200 syncer update
14338 459339 0 0 3 0x14200 cleaner cleaner
10310 189753 0 0 3 0x14200 reaper reaper
86311 278974 0 0 3 0x14200 pgdaemon pagedaemon
66034 130603 0 0 3 0x14200 bored viomb
85684 243388 0 0 3 0x40014200 acpi0 acpi0
77878 51778 0 0 7 0x40014200 idle1
46983 480844 0 0 3 0x14200 bored softnet1
2876 286737 0 0 3 0x14200 bored softnet0
10967 145658 0 0 2 0x14200 systqmp
43184 115571 0 0 3 0x14200 bored systq
95006 328052 0 0 3 0x14200 tmoslp softclockmp
59909 462452 0 0 3 0x40014200 tmoslp softclock
57578 464039 0 0 3 0x40014200 idle0
1 165749 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 80546 (syz-executor) thread 0xffff80003c42c028 (387870)
Process 6277 (syz-executor) thread 0xffff80002a28f240 (90946)
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10257 11129K 12468K 166960K 17343 0
pcb 19 20K 22K 166960K 1052 0
rtable 244 15K 16K 166960K 1473 0
pf 39 18K 67486K 166960K 601 0
ifaddr 40 8K 10K 166960K 328 0
ifgroup 60 2K 3K 166960K 648 0
sysctl 4 1K 9K 166960K 40 0
counters 70 37K 38K 166960K 830 0
ioctlops 0 0K 5K 166960K 2699 0
iov 0 0K 24K 166960K 267 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1480 93K 94K 166960K 5436 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 94 0
VM map 2 1K 1K 166960K 2 0
sem 57 115K 134K 166960K 459 0
dirhash 12 2K 3K 166960K 111 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 236K 166960K 4981 0
sigio 1 0K 0K 166960K 184 0
proc 75 115K 180K 166960K 1224 0
subproc 72 4K 4K 166960K 126 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 728 0
in_multi 80 6K 7K 166960K 357 0
ether_multi 1 0K 0K 166960K 47 0
mrt 1 0K 0K 166960K 40 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 265 1182K 1182K 166960K 265 0
exec 0 0K 1K 166960K 1409 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 18 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 285 162K 218K 166960K 47613 0
UVM aobj 109 8K 8K 166960K 122 0
pinsyscall 43 86K 110K 166960K 6262 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 1K 166960K 366 0
NDP 13 0K 2K 166960K 242 0
temp 159 8661K 8756K 166960K 400983 0
kqueue 13 20K 36K 166960K 969 0
SYN cache 2 8K 16K 166960K 3 0
ddb{0}> 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 120 532 0 528 5 3 2 2 0 8 1
rtentry 176 464 0 376 6 0 6 6 0 8 0
unpcb 144 3799 0 3781 33 32 1 9 0 8 0
syncache 336 19 0 19 9 8 1 1 0 8 1
tcpqe 32 1 13 1 1 1 0 1 0 8 0
tcpcb 736 1727 0 1710 41 39 2 9 0 8 0
arp 136 80 0 60 1 0 1 1 0 8 0
inpcb 328 6405 0 6382 68 60 8 14 0 8 4
nd6 152 56 0 40 1 0 1 1 0 8 0
pkpcb 40 49 0 49 15 14 1 1 0 8 1
kcovpl 48 14 0 6 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 310 0 309 6 5 1 1 0 8 0
pppxif 1504 42 0 42 14 14 0 1 0 8 0
pfstscr 40 4 0 4 1 1 0 1 0 8 0
pffrag 232 36 0 34 5 4 1 1 0 482 0
pffrnode 88 28 0 26 5 4 1 1 0 8 0
pffrent 40 195 0 193 6 5 1 1 0 8 0
pfosfp 40 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfrktable 1344 29 0 29 3 3 0 1 0 8 0
pfstitem 24 324 0 229 1 0 1 1 0 8 0
pfstkey 128 327 0 232 4 0 4 4 0 8 0
pfstate 384 326 0 231 13 2 11 11 0 8 0
pfrule 1344 23 0 18 2 1 1 2 0 8 0
rttmr 136 9 0 7 6 5 1 1 0 8 0
art_heap8 4096 6 0 2 6 2 4 5 0 8 0
art_heap4 256 1594 0 1203 36 9 27 29 0 8 0
art_table 40 1600 0 1205 5 0 5 5 0 8 0
art_node 32 455 0 378 2 0 2 2 0 8 0
sysvmsgpl 40 28 0 20 1 0 1 1 0 8 0
semupl 112 9 0 9 7 7 0 1 0 8 0
semapl 112 410 0 355 4 2 2 2 0 8 0
shmpl 112 119 0 13 4 0 4 4 0 8 0
dirhash 1024 83 0 66 3 0 3 3 0 8 0
dino2pl 256 10961 0 9439 96 0 96 96 0 8 0
ffsino 296 10961 0 9439 118 0 118 118 0 8 0
nchpl 144 17834 0 16114 65 0 65 65 0 8 0
rtmask 32 37 0 37 10 10 0 1 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 61782 0 61781 8 7 1 2 0 8 0
percpumem 16 430 0 380 1 0 1 1 0 8 0
kstatmem 264 424 0 394 5 2 3 3 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 17 0 17 11 11 0 1 0 8 0
scxspl 216 111767 0 111767 22 20 2 8 1 8 2
plimitpl 152 1754 0 1734 1 0 1 1 0 8 0
sigapl 424 5256 0 5207 8 1 7 7 0 8 0
knotepl 120 864 0 0 24 0 24 24 0 8 0
kqueuepl 224 2063 0 2054 24 23 1 5 0 8 0
pipepl 344 804 0 776 12 9 3 6 0 8 0
fdescpl 528 5219 0 5187 3 0 3 3 0 8 0
filepl 160 37481 0 37246 62 48 14 19 0 8 0
lockfpl 104 2611 0 2609 7 5 2 4 0 8 1
lockfspl 48 797 0 795 1 0 1 1 0 8 0
sessionpl 144 39 0 30 1 0 1 1 0 8 0
pgrppl 48 125 0 108 1 0 1 1 0 8 0
ucredpl 104 6861 0 6847 1 0 1 1 0 8 0
zombiepl 144 6605 0 6602 4 3 1 1 0 8 0
processpl 1232 5256 0 5207 6 1 5 5 0 8 0
procpl 664 13516 0 13456 7 0 7 7 0 8 0
sosppl 176 31 0 31 9 9 0 1 0 8 0
sockpl 752 10941 0 10896 133 121 12 25 0 8 5
mcl64k 65536 28 0 0 4 0 4 4 0 8 0
mcl16k 16384 6 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 134 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 82 0 0 7 2 5 7 0 8 0
mtagpl 96 15 0 0 1 0 1 1 0 8 0
mbufpl 256 5578 0 0 338 0 338 338 0 8 0
bufpl 280 45409 0 39272 439 0 439 439 0 8 0
anonpl 32 26392 0 0 213 1 212 212 0 246 0
amapchunkpl 152 171669 0 170828 119 80 39 45 0 158 5
amappl16 200 18635 0 17774 121 67 54 59 0 8 1
amappl15 192 7 0 6 2 1 1 1 0 8 0
amappl14 184 39 0 39 4 4 0 1 0 8 0
amappl13 176 507 0 502 1 0 1 1 0 8 0
amappl12 168 5648 0 5604 3 0 3 3 0 8 0
amappl11 160 14 0 13 2 1 1 1 0 8 0
amappl10 152 54 0 39 1 0 1 1 0 8 0
amappl9 144 248 0 248 1 1 0 1 0 8 0
amappl8 136 30 0 27 1 0 1 1 0 8 0
amappl7 128 104 0 103 1 0 1 1 0 8 0
amappl6 120 362 0 348 1 0 1 1 0 8 0
amappl5 112 90 0 79 1 0 1 1 0 8 0
amappl4 104 496 0 465 2 0 2 2 0 8 0
amappl3 96 29515 0 29407 3 0 3 3 0 8 0
amappl2 88 5402 0 5321 3 0 3 3 0 8 0
amappl1 80 31978 0 31384 23 2 21 23 0 8 0
amappl 88 45918 0 45711 6 0 6 6 0 92 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
dma65536 65536 1 0 1 1 0 1 1 0 8 1
dma32768 32768 2 0 2 2 2 0 1 0 8 0
dma16384 16384 1 0 1 1 1 0 1 0 8 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 4 0 4 3 3 0 1 0 8 0
dma2048 2048 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 128 257 0 257 4 4 0 1 0 8 0
dma64 64 7 0 7 2 2 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 72 121 0 13 2 0 2 2 0 8 0
uaddrrnd 24 5219 0 5187 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5219 0 5187 1 0 1 1 0 8 0
vmmpekpl 168 39281 0 39220 4 1 3 3 0 8 0
vmmpepl 168 335669 0 332768 206 60 146 165 0 357 2
vmsppl 488 5218 0 5187 7 2 5 5 0 8 0
rwobjpl 80 90498 0 82648 184 12 172 175 0 8 0
pdppl 4096 10445 0 10374 139 68 71 85 0 8 0
pvpl 32 37206 0 0 298 0 298 298 0 265 0
pmappl 256 5218 0 5187 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 720 0 145 17 0 17 17 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
icmp_mtudisc_timeout(fffffd806b7d9220,0) at icmp_mtudisc_timeout+291
rt_timer_queue_flush(ffffffff839920f8) at rt_timer_queue_flush+653
ip_sysctl(ffff80002a362bec,1,0,ffff80002a362c18,200000001300,4) at ip_sysctl+2125
net_sysctl(ffff80002a362be4,3,0,ffff80002a362c18,200000001300,4,4fc739380812767b) at net_sysctl+1614
sys_sysctl(ffff80003c42c028,ffff80002a362d50,ffff80002a362ca0) at sys_sysctl+997
syscall(ffff80002a362d50) at syscall+3028
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0xeefae5174f0, count: -7
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+39: addq $8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) at x86_ipi_db+39
x86_ipi_handler() at x86_ipi_handler+217
Xresume_lapic_ipi() at Xresume_lapic_ipi+39
acpicpu_idle() at acpicpu_idle+1111
sched_idle(ffff8000299edff0) at sched_idle+913
end trace frame: 0x0, count: -5