kernel: integer divide fault trap, code=0
Stopped at tcp_update_sndspace+0x1e1: divl %ecx,%eax
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
tcp_update_sndspace(ffff800000cde610) at tcp_update_sndspace+0x1e1 sys/netinet/tcp_usrreq.c:1514
tcp_output(ffff800000cde610) at tcp_output+0x23c8 sys/netinet/tcp_output.c:993
tcp_connect(fffffd806360e3d0,fffffd80704fdb00) at tcp_connect+0x348 sys/netinet/tcp_usrreq.c:679
sys_connect(ffff800021235370,ffff80002aec95c8,ffff80002aec9610) at sys_connect+0x203 sys/kern/uipc_syscalls.c:422
syscall(ffff80002aec9690) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002aec9690) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb631c198650, count: -6
ddb{0}> show registers
rdi 0x20008 acpi_pdirpa+0xbe6b
rsi 0x800
rbp 0xffff80002aec9310
rbx 0x4000 __ALIGN_SIZE+0x3000
rdx 0
rcx 0
rax 0x4000 __ALIGN_SIZE+0x3000
r8 0xd0
r9 0xeb7419b7ce15c075
r10 0x10f4ebac921b150c
r11 0x561930c40102b958
r12 0x800
r13 0x800
r14 0x4000 __ALIGN_SIZE+0x3000
r15 0xfffffd806360e3d0
rip 0xffffffff82165851 tcp_update_sndspace+0x1e1
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002aec92b0
ss 0x10
tcp_update_sndspace+0x1e1: divl %ecx,%eax
ddb{0}> show proc
PROC (syz-executor.6) pid=180594 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff800021234320,0xffff8000211bdb48
process=0xffff800026141d70 user=0xffff80002aec4000, vmspace=0xfffffd80089ea370
estcpu=30, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
31447 251740 34144 0 2 0 syz-executor.3
31447 325061 34144 0 2 0x4000000 syz-executor.3
94390 459419 9574 0 2 0 syz-executor.2
94390 520620 9574 0 3 0x4000080 netcon syz-executor.2
86653 55692 42188 60928 2 0x10 syz-executor.7
86653 288186 42188 60928 3 0x4000090 fsleep syz-executor.7
91867 2566 71964 0 2 0 syz-executor.5
91867 238013 71964 0 3 0x4000080 fsleep syz-executor.5
86585 93457 77229 0 2 0 syz-executor.6
*86585 180594 77229 0 7 0x4000000 syz-executor.6
86585 153478 77229 0 3 0x4000080 fsleep syz-executor.6
61891 441096 68615 0 2 0 syz-executor.1
61891 375479 68615 0 3 0x4000080 netio syz-executor.1
27 292293 10218 0 2 0 syz-executor.4
27 331356 10218 0 3 0x4000080 fsleep syz-executor.4
96671 61125 76401 0 2 0 syz-executor.0
96671 186545 76401 0 3 0x4000080 fsleep syz-executor.0
96671 138860 76401 0 3 0x4000080 fsleep syz-executor.0
68615 266013 59240 0 3 0x82 nanoslp syz-executor.1
71964 59013 59240 0 3 0x82 nanoslp syz-executor.5
9574 285130 59240 0 3 0x82 nanoslp syz-executor.2
10218 27552 59240 0 3 0x82 nanoslp syz-executor.4
30451 29491 1 0 3 0x100083 ttyin getty
77229 310120 59240 0 3 0x82 nanoslp syz-executor.6
42188 55717 59240 0 3 0x82 nanoslp syz-executor.7
76401 172868 59240 0 3 0x82 nanoslp syz-executor.0
34144 219028 59240 0 3 0x82 nanoslp syz-executor.3
45699 402804 0 0 3 0x14280 nfsidl nfsio
23634 168627 0 0 3 0x14280 nfsidl nfsio
53112 490010 0 0 3 0x14280 nfsidl nfsio
46894 145899 0 0 3 0x14280 nfsidl nfsio
21898 15465 0 0 3 0x14280 nfsidl nfsio
63672 360795 0 0 3 0x14280 nfsidl nfsio
42080 353381 0 0 3 0x14280 nfsidl nfsio
26681 363527 0 0 3 0x14280 nfsidl nfsio
55813 72657 0 0 3 0x14280 nfsidl nfsio
82780 437342 0 0 3 0x14280 nfsidl nfsio
17495 442349 0 0 3 0x14280 nfsidl nfsio
96726 383362 0 0 3 0x14280 nfsidl nfsio
51761 171800 0 0 3 0x14280 nfsidl nfsio
67881 376052 0 0 3 0x14280 nfsidl nfsio
91842 380094 0 0 3 0x14280 nfsidl nfsio
46026 64786 0 0 3 0x14280 nfsidl nfsio
55475 202838 0 0 3 0x14280 nfsidl nfsio
369 101465 0 0 3 0x14280 nfsidl nfsio
37058 396219 0 0 3 0x14280 nfsidl nfsio
30887 401723 0 0 3 0x14280 nfsidl nfsio
71811 65967 0 0 3 0x14200 bored sosplice
59240 38230 19537 0 3 0x82 wait syz-fuzzer
59240 460041 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 299367 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 454038 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 417020 19537 0 3 0x4000082 wait syz-fuzzer
59240 446911 19537 0 3 0x4000082 kqread syz-fuzzer
59240 306649 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 279964 19537 0 3 0x4000082 wait syz-fuzzer
59240 75804 19537 0 3 0x4000082 wait syz-fuzzer
59240 242682 19537 0 3 0x4000082 wait syz-fuzzer
59240 28877 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 16363 19537 0 3 0x4000082 thrsleep syz-fuzzer
59240 187512 19537 0 3 0x4000082 wait syz-fuzzer
59240 198180 19537 0 3 0x4000082 wait syz-fuzzer
59240 159370 19537 0 3 0x4000082 wait syz-fuzzer
59240 317245 19537 0 3 0x4000082 thrsleep syz-fuzzer
19537 165462 99557 0 3 0x10008a sigsusp ksh
99557 395109 9069 0 3 0x9a kqread sshd
9069 404059 1 0 3 0x88 kqread sshd
35135 55988 81546 74 3 0x1100092 bpf pflogd
81546 522003 1 0 3 0x80 netio pflogd
77596 359867 10443 73 3 0x1100090 kqread syslogd
10443 119161 1 0 3 0x100082 netio syslogd
50850 316840 1 0 3 0x100080 kqread resolvd
18370 484627 29361 77 3 0x100092 kqread dhcpleased
92218 245960 29361 77 3 0x100092 kqread dhcpleased
29361 113356 1 0 3 0x80 kqread dhcpleased
4815 317766 0 0 3 0x14200 bored smr
8030 431003 0 0 2 0x14200 zerothread
38205 61619 0 0 3 0x14200 aiodoned aiodoned
55669 337978 0 0 3 0x14200 syncer update
56455 145800 0 0 3 0x14200 cleaner cleaner
38123 254499 0 0 3 0x14200 reaper reaper
95260 351563 0 0 3 0x14200 pgdaemon pagedaemon
81220 63140 0 0 3 0x14200 bored viomb
63059 232811 0 0 3 0x40014200 acpi0 acpi0
54163 354520 0 0 7 0x40014200 idle1
79823 156144 0 0 3 0x14200 bored softnet
73120 440856 0 0 3 0x14200 bored softnet
53265 347177 0 0 3 0x14200 bored softnet
9299 341825 0 0 3 0x14200 bored softnet
26218 305129 0 0 3 0x14200 bored systqmp
25590 384866 0 0 3 0x14200 bored systq
34784 305245 0 0 3 0x40014200 bored softclock
48887 127024 0 0 3 0x40014200 idle0
1 101986 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10250 6521K 7602K 78643K 32678 0
pcb 13 16K 18K 78643K 2347 0
rtable 211 17K 19K 78643K 2825 0
ifaddr 81 29K 32K 78643K 1282 0
sysctl 3 1K 2K 78643K 19 0
counters 56 35K 37K 78643K 1052 0
ioctlops 0 0K 4K 78643K 2607 0
iov 0 0K 40K 78643K 3311 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1572 98K 98K 78643K 11125 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 167 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 2500 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 18 65K 93K 78643K 13138 0
sigio 0 0K 0K 78643K 248 0
proc 71 91K 115K 78643K 2262 0
subproc 104 6K 6K 78643K 648 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 2 0K 0K 78643K 2498 0
in_multi 77 5K 7K 78643K 957 0
ether_multi 1 0K 0K 78643K 103 0
mrt 1 0K 0K 78643K 117 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 247 1102K 1102K 78643K 247 0
exec 0 0K 1K 78643K 3184 0
pfkey data 0 0K 0K 78643K 8 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 438 98K 110K 78643K 89918 0
UVM aobj 131 4K 4K 78643K 133 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 520 0
NDP 14 0K 2K 78643K 426 0
temp 137 5778K 6802K 78643K 263718 0
kqueue 12 18K 28K 78643K 1080 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
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 1059 0 1056 14 13 1 3 0 8 0
rtentry 112 875 0 790 4 1 3 4 0 8 0
unpcb 144 12420 0 12401 120 119 1 10 0 8 0
syncache 296 98 0 98 22 22 0 1 0 8 0
tcpqe 32 74 0 74 11 11 0 1 0 8 0
tcpcb 776 16132 0 16124 215 207 8 14 0 8 7
arp 120 120 0 105 1 0 1 1 0 8 0
inpcb 368 29746 0 29602 282 268 14 20 0 8 0
nd6 48 190 0 170 1 0 1 1 0 8 0
pkpcb 40 30 0 30 6 6 0 1 0 8 0
kcovpl 48 49 0 41 1 0 1 1 0 8 0
mppekey 1024 13 0 13 4 4 0 1 0 8 0
ppxss 1256 352 0 352 25 24 1 1 0 8 1
pppxif 1456 60 0 60 8 8 0 1 0 8 0
pfstscr 40 37 0 37 5 5 0 1 0 8 0
pffrag 232 29 0 29 5 5 0 1 0 482 0
pffrnode 88 29 0 29 5 5 0 1 0 8 0
pffrent 40 88 0 88 5 5 0 1 0 8 0
pfosfp 40 1431 0 1007 5 0 5 5 0 8 0
pfosfpen 112 1431 0 716 21 0 21 21 0 8 0
pfanchor 1280 834 2 322 50 7 43 43 0 8 0
pfqueue 264 7 0 7 2 2 0 1 0 8 0
pfstitem 24 27 0 25 1 0 1 1 0 8 0
pfstkey 128 51 0 49 1 0 1 1 0 8 0
pfstate 384 34 0 32 2 1 1 2 0 8 0
pfrule 1344 21 0 20 2 1 1 2 0 8 0
rttmr 136 26 0 26 8 8 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 4103 0 3708 62 37 25 31 0 8 0
art_table 32 4104 0 3708 4 0 4 4 0 8 0
art_node 16 868 0 794 1 0 1 1 0 8 0
semapl 112 2498 0 2488 1 0 1 1 0 8 0
shmpl 112 130 0 2 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 19461 0 17959 95 0 95 95 0 8 0
ffsino 272 19461 0 17959 101 0 101 101 0 8 0
nchpl 144 37326 0 35676 63 0 63 63 0 8 0
rtmask 32 14 0 14 5 4 1 1 0 8 1
uvmvnodes 80 6342 0 0 130 0 130 130 0 8 0
vnodes 216 6342 0 0 353 0 353 353 0 8 0
namei 1024 139760 0 139760 6 5 1 2 0 8 1
percpumem 16 539 0 498 1 0 1 1 0 8 0
vmpool 696 30 0 30 9 9 0 1 0 8 0
kstatmem 264 620 0 592 6 3 3 3 0 8 0
scsiplug 72 16 0 16 5 5 0 1 0 8 0
scxspl 216 108022 0 108022 31 30 1 8 0 8 1
plimitpl 152 2607 0 2591 1 0 1 1 0 8 0
sigapl 424 13401 0 13332 10 2 8 8 0 8 0
futexpl 64 164443 0 164437 3 2 1 1 0 8 0
knotepl 120 862 0 0 15 0 15 15 0 8 0
kqueuepl 216 2478 0 2468 45 44 1 5 0 8 0
pipepl 320 3381 0 3353 86 78 8 12 0 8 5
fdescpl 496 13362 0 13331 5 1 4 5 0 8 0
filepl 152 116067 0 115680 180 165 15 24 0 8 0
lockfpl 104 12279 0 12276 28 27 1 4 0 8 0
lockfspl 48 2406 0 2403 1 0 1 1 0 8 0
sessionpl 144 70 0 53 1 0 1 1 0 8 0
pgrppl 48 297 0 280 1 0 1 1 0 8 0
ucredpl 104 13477 0 13464 1 0 1 1 0 8 0
zombiepl 144 13332 0 13332 2 1 1 1 0 8 1
processpl 1072 13401 0 13332 5 0 5 5 0 8 0
procpl 696 35795 0 35701 27 17 10 11 0 8 1
srpgc 96 58 0 58 17 17 0 1 0 8 0
sosppl 168 169 0 169 21 21 0 1 0 8 0
sockpl 488 43331 0 43165 774 753 21 36 0 8 0
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 16 0 0 2 0 2 2 0 8 0
mcl12k 12288 33 0 0 2 0 2 2 0 8 0
mcl9k 9216 13 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 17 0 0 3 0 3 3 0 8 0
mcl2k2 2112 10 0 0 1 0 1 1 0 8 0
mcl2k 2048 442 0 0 50 11 39 50 0 8 0
mtagpl 96 697 0 0 11 0 11 11 0 8 0
mbufpl 256 2315 0 0 109 0 109 109 0 8 0
bufpl 288 27136 0 20793 454 0 454 454 0 8 0
anonpl 24 2745755 0 2728165 292 152 140 159 0 186 6
amapchunkpl 152 254419 0 253546 94 58 36 49 0 158 0
amappl16 200 30656 0 30006 240 201 39 54 0 8 4
amappl15 192 7 0 7 1 1 0 1 0 8 0
amappl14 184 289 0 275 2 1 1 2 0 8 0
amappl13 176 10 0 10 2 2 0 1 0 8 0
amappl12 168 942 0 936 1 0 1 1 0 8 0
amappl11 160 56 0 42 1 0 1 1 0 8 0
amappl10 152 72 0 62 1 0 1 1 0 8 0
amappl9 144 1033 0 1033 19 18 1 1 0 8 1
amappl8 136 646 0 525 5 0 5 5 0 8 0
amappl7 128 309 0 279 2 0 2 2 0 8 0
amappl6 120 438 0 418 2 1 1 2 0 8 0
amappl5 112 492 0 482 1 0 1 1 0 8 0
amappl4 104 1132 0 1100 2 1 1 2 0 8 0
amappl3 96 39384 0 39320 2 0 2 2 0 8 0
amappl2 88 14553 0 14468 4 2 2 4 0 8 0
amappl1 80 303752 0 302902 29 11 18 28 0 8 0
amappl 88 88352 0 88116 7 1 6 6 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 72 132 0 2 3 0 3 3 0 8 0
uaddrrnd 24 13392 0 13361 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 13392 0 13361 1 0 1 1 0 8 0
vmmpekpl 168 105300 0 105229 4 0 4 4 0 8 0
vmmpepl 168 1234562 0 1231269 420 261 159 194 0 357 9
vmsppl 440 13391 0 13361 6 2 4 5 0 8 0
rwobjpl 56 329632 0 321163 155 33 122 123 0 8 0
pdppl 4096 26791 0 26722 684 615 69 83 0 8 0
pvpl 32 5398786 0 5374817 591 352 239 339 0 265 14
pmappl 248 13391 0 13361 3 1 2 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1890 0 966 27 0 27 27 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
tcp_update_sndspace(ffff800000cde610) at tcp_update_sndspace+0x1e1 sys/netinet/tcp_usrreq.c:1514
tcp_output(ffff800000cde610) at tcp_output+0x23c8 sys/netinet/tcp_output.c:993
tcp_connect(fffffd806360e3d0,fffffd80704fdb00) at tcp_connect+0x348 sys/netinet/tcp_usrreq.c:679
sys_connect(ffff800021235370,ffff80002aec95c8,ffff80002aec9610) at sys_connect+0x203 sys/kern/uipc_syscalls.c:422
syscall(ffff80002aec9690) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002aec9690) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb631c198650, count: -6
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:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d68ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175
end trace frame: 0x0, count: -5