kernel: integer divide fault trap, code=0
Stopped at m_pool_used+0x45: divl %ecx,%eax
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> trace
m_pool_used() at m_pool_used+0x45 sys/kern/uipc_mbuf.c:1502
sbchecklowmem() at sbchecklowmem+0x21 sys/kern/uipc_socket2.c:642
tcp_update_sndspace(ffff800000cdcf28) at tcp_update_sndspace+0x43 sys/netinet/tcp_usrreq.c:1527
tcp_output(ffff800000cdcf28) at tcp_output+0x24cc sys/netinet/tcp_output.c:1029
tcp_send(fffffd806e5dbac0,fffffd807f020500,0,0) at tcp_send+0xf5 sys/netinet/tcp_usrreq.c:849
sosend(fffffd806e5dbac0,0,ffff800021674858,0,0,80) at sosend+0x66d
dofilewritev(ffff8000ffff5060,4,ffff800021674858,0,ffff800021674940) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_write(ffff8000ffff5060,ffff8000216748f0,ffff800021674940) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff8000216749c0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e783a53f170, count: -10
ddb> show registers
rdi 0xffff800000cdcf28
rsi 0x4000000 __kernel_phys_end+0x1200000
rbp 0xffff800021674410
rbx 0x140003e4
rdx 0
rcx 0
rax 0x2198000 __kernel_phys_base+0x1198000
r8 0x7f7fffffc000
r9 0x80
r10 0x96d1b423280e31aa
r11 0x247a440ab14bb97d
r12 0x43e0 __ALIGN_SIZE+0x33e0
r13 0xfffffd806e5dbac0
r14 0xffff800000cdcf28
r15 0x43e0 __ALIGN_SIZE+0x33e0
rip 0xffffffff81be7f15 m_pool_used+0x45
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff800021674400
ss 0x10
m_pool_used+0x45: divl %ecx,%eax
ddb> show proc
PROC (sshd) pid=112316 stat=onproc
flags process=12<EXEC,SUGID> proc=0
pri=24, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff5b40,0xffff8000ffff5328
process=0xffff8000ffff6010 user=0xffff80002166f000, vmspace=0xfffffd807f013000
estcpu=0, cpticks=1, pctcpu=0.3
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
85795 492034 95206 0 2 0 syz-executor1998899681
95206 392157 14604 0 3 0x82 nanoslp syz-executor1998899681
14604 519376 68093 0 3 0x10008a sigsusp ksh
*68093 112316 44768 0 7 0x12 sshd
18464 111215 1 0 3 0x100083 ttyin getty
44768 489605 1 0 3 0x88 kqread sshd
36925 397362 55902 73 3 0x1100090 kqread syslogd
55902 429082 1 0 3 0x100082 netio syslogd
31121 331257 1 0 3 0x100080 kqread resolvd
15262 379982 14146 77 3 0x100092 kqread dhcpleased
80039 367478 14146 77 3 0x100092 kqread dhcpleased
14146 18566 1 0 3 0x80 kqread dhcpleased
99577 2469 0 0 3 0x14200 bored smr
86893 33431 0 0 3 0x14200 pgzero zerothread
53258 154480 0 0 3 0x14200 aiodoned aiodoned
53220 401039 0 0 3 0x14200 syncer update
8350 364067 0 0 3 0x14200 cleaner cleaner
38262 33716 0 0 3 0x14200 reaper reaper
29452 290613 0 0 3 0x14200 pgdaemon pagedaemon
23459 94468 0 0 3 0x14200 bored viomb
54341 418043 0 0 3 0x40014200 acpi0 acpi0
42487 316210 0 0 3 0x14200 bored softnet3
29693 301725 0 0 3 0x14200 bored softnet2
62650 503077 0 0 3 0x14200 bored softnet1
92601 103978 0 0 3 0x14200 bored softnet0
69325 442951 0 0 3 0x14200 bored systqmp
65676 246084 0 0 3 0x14200 bored systq
63169 487431 0 0 3 0x40014200 bored softclock
78691 291626 0 0 3 0x40014200 idle0
1 224331 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10133 6381K 6412K 78643K 11223 0
pcb 13 8K 8K 78643K 13 0
rtable 58 1K 2K 78643K 112 0
ifaddr 23 11K 11K 78643K 23 0
counters 20 16K 16K 78643K 20 0
ioctlops 0 0K 2K 78643K 21 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1174 73K 74K 78643K 1187 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 3 0K 0K 78643K 3 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 1 0K 0K 78643K 1 0
proc 55 58K 59K 78643K 246 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 11 0K 0K 78643K 11 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 25 122K 122K 78643K 25 0
exec 0 0K 1K 78643K 246 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 88 4K 5K 78643K 2170 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 3 0K 0K 78643K 3 0
temp 18 5841K 5905K 78643K 2788 0
kqueue 11 16K 18K 78643K 24 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 21 0 18 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 144 35 0 22 1 0 1 1 0 8 0
syncache 296 5 0 5 1 0 1 1 0 8 1
tcpqe 32 129 0 129 1 1 0 1 0 8 0
tcpcb 776 8 0 5 1 0 1 1 0 8 0
arp 88 2 0 0 1 0 1 1 0 8 0
inpcb 336 26 0 20 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 96 0 0 6 0 6 6 0 8 0
art_table 32 97 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
semapl 112 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1422 0 37 87 0 87 87 0 8 0
ffsino 240 1422 0 37 82 0 82 82 0 8 0
nchpl 144 1605 0 47 58 0 58 58 0 8 0
uvmvnodes 80 1431 0 0 30 0 30 30 0 8 0
vnodes 216 1431 0 0 80 0 80 80 0 8 0
namei 1024 4271 0 4271 1 0 1 1 0 8 1
kstatmem 264 6 0 0 1 0 1 1 0 8 0
scxspl 216 4634 0 4634 3 1 2 3 0 8 2
plimitpl 152 16 0 10 1 0 1 1 0 8 0
sigapl 424 313 0 283 4 0 4 4 0 8 0
knotepl 120 3350 0 3320 2 0 2 2 0 8 1
kqueuepl 184 20 0 13 1 0 1 1 0 8 0
pipepl 288 89 0 86 1 0 1 1 0 8 0
fdescpl 432 297 0 283 2 0 2 2 0 8 0
filepl 120 1137 0 1084 2 0 2 2 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 17 0 9 1 0 1 1 0 8 0
pgrppl 48 17 0 9 1 0 1 1 0 8 0
ucredpl 104 66 0 56 1 0 1 1 0 8 0
zombiepl 144 283 0 283 1 0 1 1 0 8 1
processpl 1008 313 0 283 5 1 4 5 0 8 0
procpl 696 313 0 283 4 1 3 4 0 8 0
sockpl 456 82 0 60 3 0 3 3 0 8 0
mcl8k 8192 9 0 9 2 1 1 1 0 8 1
mcl4k 4096 5 0 5 1 0 1 1 0 8 1
mcl2k 2048 10798 0 10762 28 15 13 28 0 8 7
mtagpl 96 4 0 4 1 1 0 1 0 8 0
mbufpl 256 17446 0 17403 15 5 10 15 0 8 7
bufpl 288 2398 0 92 165 0 165 165 0 8 0
anonpl 24 185765 0 183923 24 1 23 24 0 188 11
amapchunkpl 152 8350 0 8210 7 1 6 7 0 158 0
amappl16 200 5582 0 5582 5 1 4 5 0 8 4
amappl15 192 13 0 13 2 2 0 1 0 8 0
amappl14 184 104 0 95 1 0 1 1 0 8 0
amappl13 176 11 0 11 1 1 0 1 0 8 0
amappl12 168 823 0 810 1 0 1 1 0 8 0
amappl11 160 50 0 40 1 0 1 1 0 8 0
amappl10 152 24 0 24 1 0 1 1 0 8 1
amappl9 144 123 0 123 1 0 1 1 0 8 1
amappl8 136 46 0 44 1 0 1 1 0 8 0
amappl7 128 33 0 28 1 0 1 1 0 8 0
amappl6 120 152 0 140 1 0 1 1 0 8 0
amappl5 112 84 0 77 1 0 1 1 0 8 0
amappl4 104 427 0 400 1 0 1 1 0 8 0
amappl3 96 2261 0 2230 1 0 1 1 0 8 0
amappl2 88 467 0 428 2 1 1 2 0 8 0
amappl1 80 9054 0 8632 11 0 11 11 0 8 0
amappl 88 1899 0 1848 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 297 0 283 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 297 0 283 1 0 1 1 0 8 0
vmmpekpl 168 7001 0 6990 1 0 1 1 0 8 0
vmmpepl 168 34159 0 33227 46 1 45 46 0 357 1
vmsppl 368 296 0 283 2 0 2 2 0 8 0
rwobjpl 24 19077 0 17031 14 1 13 14 0 8 0
pdppl 4096 601 0 566 51 16 35 41 0 8 0
pvpl 32 280085 0 275903 52 1 51 52 0 265 14
pmappl 216 296 0 283 1 0 1 1 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 449 0 39 12 0 12 12 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
m_pool_used() at m_pool_used+0x45 sys/kern/uipc_mbuf.c:1502
sbchecklowmem() at sbchecklowmem+0x21 sys/kern/uipc_socket2.c:642
tcp_update_sndspace(ffff800000cdcf28) at tcp_update_sndspace+0x43 sys/netinet/tcp_usrreq.c:1527
tcp_output(ffff800000cdcf28) at tcp_output+0x24cc sys/netinet/tcp_output.c:1029
tcp_send(fffffd806e5dbac0,fffffd807f020500,0,0) at tcp_send+0xf5 sys/netinet/tcp_usrreq.c:849
sosend(fffffd806e5dbac0,0,ffff800021674858,0,0,80) at sosend+0x66d
dofilewritev(ffff8000ffff5060,4,ffff800021674858,0,ffff800021674940) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_write(ffff8000ffff5060,ffff8000216748f0,ffff800021674940) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff8000216749c0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e783a53f170, count: -10
ddb> machine ddbcpu 1
No such command
ddb> trace
m_pool_used() at m_pool_used+0x45 sys/kern/uipc_mbuf.c:1502
sbchecklowmem() at sbchecklowmem+0x21 sys/kern/uipc_socket2.c:642
tcp_update_sndspace(ffff800000cdcf28) at tcp_update_sndspace+0x43 sys/netinet/tcp_usrreq.c:1527
tcp_output(ffff800000cdcf28) at tcp_output+0x24cc sys/netinet/tcp_output.c:1029
tcp_send(fffffd806e5dbac0,fffffd807f020500,0,0) at tcp_send+0xf5 sys/netinet/tcp_usrreq.c:849
sosend(fffffd806e5dbac0,0,ffff800021674858,0,0,80) at sosend+0x66d
dofilewritev(ffff8000ffff5060,4,ffff800021674858,0,ffff800021674940) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375
sys_write(ffff8000ffff5060,ffff8000216748f0,ffff800021674940) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff8000216749c0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e783a53f170, count: -10