panic: ifa_update_broadaddr does not support dynamic length
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*220024 90540 0 0 0 1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
ifa_update_broadaddr(ffff800000a67000,ffff800000a91800,ffff800020b59780) at ifa_update_broadaddr+0x61 sys/net/if.c:2970
in_ioctl(80206913,ffff800020b59770,ffff800000a67000,1) at in_ioctl+0x463 sys/netinet/in.c:311
ifioctl(fffffd806e97d908,80206913,ffff800020b59770,ffff800020ab1650) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020ab1650,ffff800020b59888,ffff800020b598d0) at sys_ioctl+0x5b9
syscall(ffff800020b59950) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b59950) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,187e8ecd010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffebd00, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
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ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
ifa_update_broadaddr does not support dynamic length
ddb{1}> 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
ifa_update_broadaddr(ffff800000a67000,ffff800000a91800,ffff800020b59780) at ifa_update_broadaddr+0x61 sys/net/if.c:2970
in_ioctl(80206913,ffff800020b59770,ffff800000a67000,1) at in_ioctl+0x463 sys/netinet/in.c:311
ifioctl(fffffd806e97d908,80206913,ffff800020b59770,ffff800020ab1650) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020ab1650,ffff800020b59888,ffff800020b598d0) at sys_ioctl+0x5b9
syscall(ffff800020b59950) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b59950) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,187e8ecd010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffebd00, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020b59510
rbx 0xffff800020b595c0
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff81d00c7f kprintf+0x16f
r9 0x1
r10 0x92787ebf833942e7
r11 0xeb4145902df661d0
r12 0x3000000008
r13 0xffff800020b59520
r14 0x100
r15 0x1
rip 0xffffffff8120bfe8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b59500
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=220024 stat=onproc
flags process=0 proc=0
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020a5eed8,0xffffffff8266a260
process=0xffff800020add880 user=0xffff800020b54000, vmspace=0xfffffd807f00aa10
estcpu=9, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*90540 220024 62057 0 7 0 syz-executor.0
62057 358839 89726 0 3 0x82 nanosleep syz-executor.0
89726 306556 94447 0 3 0x82 thrsleep syz-execprog
89726 154370 94447 0 3 0x4000082 nanosleep syz-execprog
89726 501755 94447 0 3 0x4000082 thrsleep syz-execprog
89726 154245 94447 0 3 0x4000082 thrsleep syz-execprog
89726 432099 94447 0 3 0x4000082 thrsleep syz-execprog
89726 112087 94447 0 3 0x4000082 thrsleep syz-execprog
89726 384408 94447 0 3 0x4000082 thrsleep syz-execprog
89726 160264 94447 0 3 0x4000082 nanosleep syz-execprog
94447 353160 29839 0 3 0x10008a pause ksh
29839 224812 51566 0 3 0x92 select sshd
77441 471558 1 0 3 0x100083 ttyin getty
51566 158562 1 0 3 0x80 select sshd
37658 450740 5191 74 3 0x100092 bpf pflogd
5191 500416 1 0 3 0x80 netio pflogd
72457 97377 9180 73 3 0x100090 kqread syslogd
9180 495349 1 0 3 0x100082 netio syslogd
43651 309071 1 77 3 0x100090 poll dhclient
10433 361915 1 0 3 0x80 poll dhclient
86931 360432 0 0 3 0x14200 pgzero zerothread
8707 157251 0 0 3 0x14200 aiodoned aiodoned
46819 195242 0 0 3 0x14200 syncer update
35646 110026 0 0 3 0x14200 cleaner cleaner
99296 442009 0 0 3 0x14200 reaper reaper
95557 80071 0 0 3 0x14200 pgdaemon pagedaemon
62211 221600 0 0 3 0x14200 bored crynlk
29035 167119 0 0 3 0x14200 bored crypto
37671 172084 0 0 3 0x40014200 acpi0 acpi0
56699 415107 0 0 3 0x40014200 idle1
88315 174170 0 0 3 0x14200 bored softnet
2089 522630 0 0 3 0x14200 bored systqmp
20210 396642 0 0 3 0x14200 bored systq
8323 104246 0 0 3 0x40014200 bored softclock
88946 15791 0 0 7 0x40014200 idle0
76825 349698 0 0 3 0x14200 bored smr
1 218621 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 90540 (syz-executor.0) thread 0xffff800020ab1650 (220024)
exclusive rwlock netlock r = 0 (0xffffffff824c0f78)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 in_ioctl+0x142
#2 ifioctl+0xb64 sys/net/if.c:2202
#3 sys_ioctl+0x5b9
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#5 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82623a10)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9457 6385K 6385K 78643K 10544 0 0
pcb 13 8K 8K 78643K 13 0 0
rtable 83 2K 2K 78643K 163 0 0
ifaddr 32 9K 9K 78643K 33 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1468 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1181 74K 74K 78643K 1186 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 1K 78643K 2 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 2 0K 0K 78643K 2 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 3 8K 12K 78643K 18 0 0
proc 59 63K 83K 78643K 398 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
in_multi 22 1K 1K 78643K 22 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 18 79K 79K 78643K 18 0 0
exec 0 0K 1K 78643K 197 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 72 11K 12K 78643K 947 0 0
UVM aobj 2 2K 2K 78643K 2 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
NDP 7 0K 0K 78643K 7 0 0
temp 48 3542K 3606K 78643K 3305 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 4 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 17 0 15 1 0 1 1 0 8 0
rtentry 112 34 0 1 1 0 1 1 0 8 0
unpcb 120 29 0 19 1 0 1 1 0 8 0
syncache 264 5 0 5 2 1 1 1 0 8 1
tcpcb 544 8 0 5 1 0 1 1 0 8 0
inpcb 280 34 0 27 1 0 1 1 0 8 0
nd6 48 2 0 0 1 0 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
pfstitem 24 11 0 2 1 0 1 1 0 8 0
pfstkey 112 11 0 2 1 0 1 1 0 8 0
pfstate 328 11 0 2 1 0 1 1 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 167 0 0 11 0 11 11 0 8 0
art_table 32 168 0 0 2 0 2 2 0 8 0
art_node 16 33 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1421 0 20 46 0 46 46 0 8 0
ffsino 272 1421 0 20 94 0 94 94 0 8 0
nchpl 144 1660 0 52 61 1 60 60 0 8 0
uvmvnodes 72 1431 0 0 27 0 27 27 0 8 0
vnodes 208 1431 0 0 76 0 76 76 0 8 0
namei 1024 4129 0 4129 2 1 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 4208 0 4208 9 2 7 7 0 8 7
plimitpl 152 15 0 8 1 0 1 1 0 8 0
sigapl 432 224 0 210 2 0 2 2 0 8 0
knotepl 112 39 0 28 1 0 1 1 0 8 0
kqueuepl 104 2 0 0 1 0 1 1 0 8 0
pipepl 112 148 0 135 2 1 1 1 0 8 0
fdescpl 488 225 0 210 3 0 3 3 0 8 0
filepl 152 1112 0 1053 3 0 3 3 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 112 19 0 9 1 0 1 1 0 8 0
pgrppl 48 19 0 9 1 0 1 1 0 8 0
ucredpl 96 52 0 43 1 0 1 1 0 8 0
zombiepl 144 210 0 210 2 1 1 1 0 8 1
processpl 896 240 0 210 4 0 4 4 0 8 0
procpl 632 247 0 210 4 0 4 4 0 8 0
sockpl 384 80 0 61 2 0 2 2 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 80 0 0 10 0 10 10 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 112 0 0 6 0 6 6 0 8 0
bufpl 256 5881 0 1309 286 0 286 286 0 8 0
anonpl 16 22099 0 20540 14 1 13 13 0 124 5
amapchunkpl 152 737 0 669 5 0 5 5 0 158 1
amappl16 192 142 0 112 2 0 2 2 0 8 0
amappl15 184 1 0 1 1 0 1 1 0 8 1
amappl14 176 50 0 44 1 0 1 1 0 8 0
amappl12 160 10 0 10 1 1 0 1 0 8 0
amappl11 152 59 0 44 1 0 1 1 0 8 0
amappl10 144 12 0 10 1 0 1 1 0 8 0
amappl9 136 435 0 432 1 0 1 1 0 8 0
amappl8 128 128 0 116 1 0 1 1 0 8 0
amappl7 120 32 0 28 1 0 1 1 0 8 0
amappl6 112 61 0 54 1 0 1 1 0 8 0
amappl5 104 129 0 116 1 0 1 1 0 8 0
amappl4 96 493 0 467 1 0 1 1 0 8 0
amappl3 88 120 0 110 1 0 1 1 0 8 0
amappl2 80 902 0 841 4 1 3 3 0 8 1
amappl1 72 15277 0 14849 25 7 18 20 0 8 8
amappl 80 476 0 446 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 225 0 210 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 225 0 210 1 0 1 1 0 8 0
vmmpekpl 168 6384 0 6362 2 0 2 2 0 8 0
vmmpepl 168 32160 0 31220 92 12 80 80 0 357 39
vmsppl 368 224 0 210 2 0 2 2 0 8 0
pdppl 4096 457 0 420 6 0 6 6 0 8 1
pvpl 32 112389 0 108379 120 5 115 115 0 265 81
pmappl 232 224 0 210 1 0 1 1 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 427 0 4 13 0 13 13 0 8 0
ddb{1}>