panic: Data modified on freelist: word 5 of object 0xffff8000006a0300 size 0xc0 previous type devbuf (0xd != 0xdeadbeef)
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*119579 10937 0 0 0 0 dhclient
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
malloc(c0,5,9) at malloc+0xa23 sys/kern/kern_malloc.c:331
rtm_report(fffffd8036d681c0,4,c4406da1,0) at rtm_report+0x2d9 sys/net/rtsock.c:654
route_output(fffffd802e0ea400,fffffd8037002180,0,0) at route_output+0x6b7 sys/net/rtsock.c:824
route_usrreq(fffffd8037002180,9,fffffd802e0ea400,0,0,ffff8000ffff8280) at route_usrreq+0x363 sys/net/rtsock.c:275
sosend(fffffd8037002180,0,ffff800014886a90,0,0,0) at sosend+0x63d sys/kern/uipc_socket.c:524
dofilewritev(ffff8000ffff8280,6,ffff800014886a90,0,ffff800014886b80) at dofilewritev+0x1ac sys/kern/sys_generic.c:364
sys_writev(ffff8000ffff8280,ffff800014886b30,ffff800014886b80) at sys_writev+0xa7 sys/kern/sys_generic.c:311
syscall(ffff800014886c00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(0,79,0,79,c4406da1,f8593a1a000) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe7dd0, count: 4
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
Data modified on freelist: word 5 of object 0xffff8000006a0300 size 0xc0 previous type devbuf (0xd != 0xdeadbeef)
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
malloc(c0,5,9) at malloc+0xa23 sys/kern/kern_malloc.c:331
rtm_report(fffffd8036d681c0,4,c4406da1,0) at rtm_report+0x2d9 sys/net/rtsock.c:654
route_output(fffffd802e0ea400,fffffd8037002180,0,0) at route_output+0x6b7 sys/net/rtsock.c:824
route_usrreq(fffffd8037002180,9,fffffd802e0ea400,0,0,ffff8000ffff8280) at route_usrreq+0x363 sys/net/rtsock.c:275
sosend(fffffd8037002180,0,ffff800014886a90,0,0,0) at sosend+0x63d sys/kern/uipc_socket.c:524
dofilewritev(ffff8000ffff8280,6,ffff800014886a90,0,ffff800014886b80) at dofilewritev+0x1ac sys/kern/sys_generic.c:364
sys_writev(ffff8000ffff8280,ffff800014886b30,ffff800014886b80) at sys_writev+0xa7 sys/kern/sys_generic.c:311
syscall(ffff800014886c00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(0,79,0,79,c4406da1,f8593a1a000) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe7dd0, count: -11
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff8000148863a0
rbx 0xffff800014886450
rdx 0x2
rcx 0
rax 0
r8 0xffff800014886360
r9 0x1
r10 0
r11 0x3cb0e7313acdeb4c
r12 0x3000000008
r13 0xffff8000148863b0
r14 0x100
r15 0x1
rip 0xffffffff82159ec8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800014886390
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (dhclient) pid=119579 stat=onproc
flags process=0 proc=0
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff9150,0xffff8000ffff8780
process=0xffff8000ffff66d0 user=0xffff800014881000, vmspace=0xfffffd803f014330
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
8213 489720 1538 0 2 0 syz-executor.1
8213 56340 1538 0 2 0x4000000 syz-executor.1
1538 318063 93648 0 3 0x82 nanosleep syz-executor.1
29608 223078 1 0 3 0x100083 ttyin getty
93481 212970 0 0 3 0x14200 bored sosplice
93648 389395 86162 0 3 0x82 thrsleep syz-fuzzer
93648 206743 86162 0 3 0x4000082 thrsleep syz-fuzzer
93648 168664 86162 0 3 0x4000082 thrsleep syz-fuzzer
93648 325333 86162 0 3 0x4000082 thrsleep syz-fuzzer
93648 353782 86162 0 3 0x4000082 kqread syz-fuzzer
93648 226728 86162 0 3 0x4000082 thrsleep syz-fuzzer
93648 121638 86162 0 3 0x4000082 thrsleep syz-fuzzer
93648 40975 86162 0 3 0x4000082 thrsleep syz-fuzzer
86162 256091 11706 0 3 0x10008a pause ksh
11706 205548 507 0 3 0x92 select sshd
507 385128 1 0 3 0x80 select sshd
29439 221267 57609 73 3 0x100090 kqread syslogd
57609 489283 1 0 3 0x100082 netio syslogd
11038 363672 1 77 2 0x100010 dhclient
*10937 119579 1 0 7 0 dhclient
44406 397731 0 0 2 0x14200 zerothread
28301 39817 0 0 3 0x14200 aiodoned aiodoned
83206 200987 0 0 3 0x14200 syncer update
16882 413110 0 0 3 0x14200 cleaner cleaner
88792 70867 0 0 3 0x14200 reaper reaper
68392 121585 0 0 3 0x14200 pgdaemon pagedaemon
73261 199533 0 0 3 0x14200 bored crynlk
81491 362484 0 0 3 0x14200 bored crypto
40689 90114 0 0 3 0x40014200 acpi0 acpi0
77067 281419 0 0 2 0x14200 softnet
68800 110990 0 0 2 0x14200 systqmp
22335 399082 0 0 3 0x14200 bored systq
76635 241804 0 0 3 0x40014200 bored softclock
16401 456105 0 0 3 0x40014200 idle0
67306 483311 0 0 3 0x14200 bored smr
1 208777 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 Kern Lim
devbuf 9591 6364K 7114K 78643K 13914 0 0
pcb 13 11K 13K 78643K 324 0 0
rtable 101 12K 13K 78643K 1248 0 0
ifaddr 87 17K 19K 78643K 364 0 0
counters 19 16K 16K 78643K 19 0 0
ioctlops 0 0K 2K 78643K 137 0 0
iov 0 0K 16K 78643K 409 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1223 77K 77K 78643K 2661 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 34 0 0
VM map 11 2K 3K 78643K 18 0 0
sem 12 1K 1K 78643K 66 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1793 195K 288K 78643K 12645 0 0
file desc 4 9K 25K 78643K 1578 0 0
sigio 0 0K 0K 78643K 34 0 0
proc 49 38K 55K 78643K 976 0 0
subproc 16 1K 2K 78643K 238 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 94 0 0
in_multi 21 1K 2K 78643K 268 0 0
ether_multi 1 0K 0K 78643K 26 0 0
mrt 0 0K 0K 78643K 4 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 150 662K 662K 78643K 150 0 0
exec 0 0K 1K 78643K 483 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 116 95K 112K 78643K 5007 0 0
UVM aobj 111 3K 4K 78643K 146 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 291 0 0
NDP 22 0K 0K 78643K 117 0 0
temp 224 3544K 3673K 78643K 84422 0 0
kqueue 0 0K 0K 78643K 22 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 35 0 30 1 0 1 1 0 8 0
rtpcb 80 253 0 251 1 0 1 1 0 8 0
rtentry 112 217 0 184 2 0 2 2 0 8 0
unpcb 120 943 0 935 2 1 1 2 0 8 0
syncache 264 12 0 12 4 4 0 1 0 8 0
tcpqe 32 37 0 37 3 3 0 1 0 8 0
tcpcb 544 757 0 753 16 15 1 15 0 8 0
ipq 40 899 0 899 3 2 1 1 0 8 1
ipqe 40 1977 0 1977 3 2 1 1 0 8 1
inpcb 280 3390 0 3381 17 15 2 9 0 8 1
rttmr 72 1 0 1 1 1 0 1 0 8 0
nd6 48 32 0 31 3 2 1 1 0 8 0
pkpcb 40 4 0 4 2 2 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 36 0 36 8 7 1 1 0 8 1
art_heap8 4096 8 0 7 6 5 1 3 0 8 0
art_heap4 256 999 0 827 25 13 12 17 0 8 0
art_table 32 1007 0 834 3 1 2 3 0 8 0
art_node 16 216 0 182 1 0 1 1 0 8 0
sysvmsgpl 40 18 0 15 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 64 0 54 1 0 1 1 0 8 0
shmpl 112 144 0 35 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 3739 0 2345 46 0 46 46 0 8 0
ffsino 240 3739 0 2345 83 0 83 83 0 8 0
nchpl 144 6108 0 5618 60 41 19 60 0 8 0
uvmvnodes 72 4846 0 0 89 0 89 89 0 8 0
vnodes 208 4846 0 0 256 0 256 256 0 8 0
namei 1024 21772 0 21772 2 1 1 1 0 8 1
vcpupl 1984 10 0 1 2 0 2 2 0 8 0
vmpool 520 16 0 7 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 19907 0 19907 14 13 1 7 0 8 1
plimitpl 152 162 0 156 1 0 1 1 0 8 0
sigapl 432 1714 0 1702 2 0 2 2 0 8 0
futexpl 56 45566 0 45566 2 1 1 1 0 8 1
knotepl 112 724 0 711 3 1 2 2 0 8 1
kqueuepl 104 667 0 665 4 3 1 4 0 8 0
pipepl 112 1926 0 1913 11 9 2 2 0 8 1
fdescpl 424 1715 0 1702 2 0 2 2 0 8 0
filepl 120 16655 0 16581 20 16 4 10 0 8 0
lockfpl 104 587 0 586 1 0 1 1 0 8 0
lockfspl 48 199 0 198 1 0 1 1 0 8 0
sessionpl 112 30 0 21 1 0 1 1 0 8 0
pgrppl 48 52 0 43 1 0 1 1 0 8 0
ucredpl 96 2806 0 2799 1 0 1 1 0 8 0
zombiepl 144 1703 0 1703 2 1 1 1 0 8 1
processpl 864 1731 0 1703 4 0 4 4 0 8 0
procpl 632 3720 0 3684 4 0 4 4 0 8 0
sosppl 128 19 0 19 6 5 1 1 0 8 1
sockpl 384 4646 0 4627 27 23 4 14 0 8 2
mcl64k 65536 203 0 203 4 3 1 1 0 8 1
mcl16k 16384 63 0 63 6 5 1 1 0 8 1
mcl12k 12288 72 0 72 5 5 0 1 0 8 0
mcl9k 9216 57 0 57 6 5 1 1 0 8 1
mcl8k 8192 335 0 335 4 3 1 1 0 8 1
mcl4k 4096 140 0 140 5 4 1 1 0 8 1
mcl2k2 2112 4 0 4 4 4 0 1 0 8 0
mcl2k 2048 70837 0 70795 25 19 6 13 0 8 0
mtagpl 80 69 0 66 5 4 1 1 0 8 0
mbufpl 256 135937 0 135857 61 50 11 25 0 8 2
bufpl 256 11588 0 6370 332 5 327 327 0 8 0
anonpl 16 231037 0 216707 130 48 82 93 0 62 5
amapchunkpl 152 10004 0 9897 44 34 10 19 0 158 4
amappl16 192 9915 0 8856 107 51 56 66 0 8 2
amappl15 184 17 0 17 3 3 0 1 0 8 0
amappl14 176 589 0 586 1 0 1 1 0 8 0
amappl13 168 150 0 149 5 4 1 1 0 8 0
amappl12 160 9 0 7 1 0 1 1 0 8 0
amappl11 152 407 0 396 1 0 1 1 0 8 0
amappl10 144 253 0 250 1 0 1 1 0 8 0
amappl9 136 904 0 896 1 0 1 1 0 8 0
amappl8 128 441 0 405 3 1 2 2 0 8 0
amappl7 120 333 0 325 1 0 1 1 0 8 0
amappl6 112 390 0 379 1 0 1 1 0 8 0
amappl5 104 302 0 293 1 0 1 1 0 8 0
amappl4 96 2067 0 2039 1 0 1 1 0 8 0
amappl3 88 404 0 398 1 0 1 1 0 8 0
amappl2 80 12385 0 12321 3 1 2 3 0 8 0
amappl1 72 42164 0 41761 26 16 10 20 0 8 0
amappl 80 4152 0 4112 4 2 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 17 0 17 1 1 0 1 0 8 0
aobjpl 64 145 0 35 2 0 2 2 0 8 0
uaddrrnd 24 1731 0 1702 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1731 0 1702 1 0 1 1 0 8 0
vmmpekpl 168 16965 0 16938 2 0 2 2 0 8 0
vmmpepl 168 217666 0 215600 230 102 128 141 0 357 29
vmsppl 272 1714 0 1702 5 4 1 2 0 8 0
pdppl 4096 3468 0 3427 7 1 6 6 0 8 0
pvpl 32 583201 0 565893 268 74 194 215 0 265 15
pmappl 200 1730 0 1709 2 0 2 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 586 0 130 14 0 14 14 0 8 0