panic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/main/kernel/sys/netinet6/nd6.c", line 947
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*431403 44738 0 0 0x4000000 0 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
__assert(ffffffff821e690c,ffffffff821c9f25,3b3,ffffffff821a07f6) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_rtrequest(ffff800000adf800,1,fffffd802a9f8c48) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947
rtrequest(1,ffff800017993408,1,ffff8000179934d8,0) at rtrequest+0x9be sys/net/route.c:973
rt_ifa_add(ffff800000ace100,240404,ffff800000ace158,0) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000ace100) at rt_ifa_addlocal+0x149 sys/net/route.c:1242
in_ifinit(ffff800000adf800,ffff800000ace100,ffff800017993800,0) at in_ifinit+0x1cf sys/netinet/in.c:614
in_ioctl_sifaddr(8020690c,ffff8000179937f0,ffff800000adf800,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360
in_ioctl(8020690c,ffff8000179937f0,ffff800000adf800,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd802923f318,8020690c,ffff8000179937f0,ffff800014914c70) at ifioctl+0xb34 sys/net/if.c:2202
sys_ioctl(ffff800014914c70,ffff800017993908,ffff800017993950) at sys_ioctl+0x5b9
syscall(ffff8000179939d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,ffca35ea010) at Xsyscall+0x128
end of kernel
end trace frame: 0xfff939a0a50, count: 1
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
kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/main/kernel/sys/netinet6/nd6.c", line 947
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
__assert(ffffffff821e690c,ffffffff821c9f25,3b3,ffffffff821a07f6) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_rtrequest(ffff800000adf800,1,fffffd802a9f8c48) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947
rtrequest(1,ffff800017993408,1,ffff8000179934d8,0) at rtrequest+0x9be sys/net/route.c:973
rt_ifa_add(ffff800000ace100,240404,ffff800000ace158,0) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000ace100) at rt_ifa_addlocal+0x149 sys/net/route.c:1242
in_ifinit(ffff800000adf800,ffff800000ace100,ffff800017993800,0) at in_ifinit+0x1cf sys/netinet/in.c:614
in_ioctl_sifaddr(8020690c,ffff8000179937f0,ffff800000adf800,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360
in_ioctl(8020690c,ffff8000179937f0,ffff800000adf800,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd802923f318,8020690c,ffff8000179937f0,ffff800014914c70) at ifioctl+0xb34 sys/net/if.c:2202
sys_ioctl(ffff800014914c70,ffff800017993908,ffff800017993950) at sys_ioctl+0x5b9
syscall(ffff8000179939d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,ffca35ea010) at Xsyscall+0x128
end of kernel
end trace frame: 0xfff939a0a50, count: -14
ddb> show registers
rdi 0xffffffff82060497 db_enter+0x17
rsi 0x4acd __ALIGN_SIZE+0x3acd
rbp 0xffff800017993140
rbx 0xffff8000179931f0
rdx 0x4ace __ALIGN_SIZE+0x3ace
rcx 0xffff800014916000
rax 0xffff800014916000
r8 0xffff800017993100
r9 0x1
r10 0xffff800000a6cac0
r11 0x3471b43fa0d258ec
r12 0x3000000008
r13 0xffff800017993150
r14 0x100
r15 0x1
rip 0xffffffff82060498 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800017993130
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.0) pid=431403 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=80, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff800014914290,0xffffffff82573380
process=0xffff8000148a26d8 user=0xffff80001798e000, vmspace=0xfffffd803f013dd0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
44738 204200 37729 0 2 0 syz-executor.0
*44738 431403 37729 0 7 0x4000000 syz-executor.0
8529 423975 29149 0 2 0x2 syz-executor.1
54780 477295 0 0 3 0x14200 acct acct
37729 238587 29149 0 2 0x482 syz-executor.0
84786 320706 1 0 3 0x100083 ttyin getty
34425 423446 0 0 3 0x14200 bored sosplice
29149 182594 82263 0 3 0x82 thrsleep syz-fuzzer
29149 131302 82263 0 3 0x4000082 nanosleep syz-fuzzer
29149 394214 82263 0 3 0x4000082 thrsleep syz-fuzzer
29149 519680 82263 0 3 0x4000082 thrsleep syz-fuzzer
29149 304732 82263 0 3 0x4000082 thrsleep syz-fuzzer
29149 42965 82263 0 3 0x4000082 kqread syz-fuzzer
29149 86376 82263 0 3 0x4000082 thrsleep syz-fuzzer
29149 145473 82263 0 3 0x4000082 thrsleep syz-fuzzer
82263 151619 53153 0 3 0x10008a pause ksh
53153 239501 61713 0 3 0x92 select sshd
61713 362132 1 0 3 0x80 select sshd
82097 117296 35929 73 3 0x100090 kqread syslogd
35929 335372 1 0 3 0x100082 netio syslogd
45520 316237 1 77 3 0x100090 poll dhclient
65013 521912 1 0 3 0x80 poll dhclient
88565 4428 0 0 2 0x14200 zerothread
3467 13204 0 0 3 0x14200 aiodoned aiodoned
86542 385034 0 0 3 0x14200 syncer update
33492 169414 0 0 3 0x14200 cleaner cleaner
60299 316561 0 0 3 0x14200 reaper reaper
70703 387824 0 0 3 0x14200 pgdaemon pagedaemon
88282 16829 0 0 3 0x14200 bored crynlk
70155 69084 0 0 3 0x14200 bored crypto
68757 249963 0 0 3 0x40014200 acpi0 acpi0
93480 411612 0 0 3 0x14200 bored softnet
42139 496540 0 0 2 0x14200 systqmp
78369 359856 0 0 3 0x14200 bored systq
3567 214817 0 0 3 0x40014200 bored softclock
97574 246782 0 0 3 0x40014200 idle0
56541 261392 0 0 3 0x14200 bored smr
1 294691 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 9584 6617K 6993K 78643K 13659 0 0
pcb 13 8K 8K 78643K 1083 0 0
rtable 100 6K 6K 78643K 1139 0 0
ifaddr 75 16K 17K 78643K 277 0 0
counters 19 16K 16K 78643K 19 0 0
ioctlops 0 0K 2K 78643K 102 0 0
iov 0 0K 24K 78643K 479 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1220 77K 77K 78643K 2383 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 24 0 0
VM map 15 3K 3K 78643K 24 0 0
sem 11 1K 1K 78643K 14 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1793 195K 288K 78643K 12645 0 0
file desc 5 13K 25K 78643K 1355 0 0
sigio 0 0K 0K 78643K 16 0 0
proc 48 38K 63K 78643K 725 0 0
subproc 32 2K 2K 78643K 136 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 113 0 0
in_multi 19 1K 2K 78643K 201 0 0
ether_multi 1 0K 0K 78643K 14 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 162 715K 715K 78643K 162 0 0
exec 0 0K 1K 78643K 417 0 0
pfkey data 0 0K 0K 78643K 2 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 117 119K 119K 78643K 4629 0 0
UVM aobj 60 3K 3K 78643K 72 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 1K 78643K 295 0 0
NDP 18 0K 0K 78643K 90 0 0
temp 212 3540K 4180K 78643K 123918 0 0
kqueue 0 0K 0K 78643K 2 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 51 0 47 1 0 1 1 0 8 0
rtpcb 80 173 0 171 1 0 1 1 0 8 0
rtentry 112 231 0 194 2 0 2 2 0 8 0
unpcb 120 683 0 672 1 0 1 1 0 8 0
syncache 264 18 0 18 8 8 0 1 0 8 0
tcpqe 32 104 0 104 3 3 0 1 0 8 0
tcpcb 544 503 0 499 3 1 2 2 0 8 1
ipq 40 10 0 10 3 2 1 1 0 8 1
ipqe 40 114 0 114 3 2 1 1 0 8 1
inpcb 280 2321 0 2311 11 8 3 3 0 8 2
rttmr 72 1 0 1 1 1 0 1 0 8 0
ip6q 72 2 0 2 1 1 0 1 0 8 0
ip6af 40 6 0 6 1 1 0 1 0 8 0
nd6 48 27 0 24 1 0 1 1 0 8 0
pkpcb 40 6 0 6 3 3 0 1 0 8 0
ppxss 1128 27 0 27 9 8 1 1 0 8 1
art_heap8 4096 5 0 4 5 4 1 3 0 8 0
art_heap4 256 925 0 731 23 10 13 15 0 8 0
art_table 32 930 0 735 2 0 2 2 0 8 0
art_node 16 230 0 195 1 0 1 1 0 8 0
sysvmsgpl 40 68 0 42 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 10 0 1 1 0 1 1 0 8 0
shmpl 112 70 0 12 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 3587 0 2191 46 0 46 46 0 8 0
ffsino 240 3587 0 2191 83 0 83 83 0 8 0
nchpl 144 5947 0 5467 60 41 19 60 0 8 0
uvmvnodes 72 4422 0 0 81 0 81 81 0 8 0
vnodes 208 4422 0 0 233 0 233 233 0 8 0
namei 1024 22773 0 22773 2 1 1 1 0 8 1
vcpupl 1984 14 0 1 2 0 2 2 0 8 0
vmpool 520 22 0 9 2 1 1 1 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 20464 0 20464 14 13 1 7 0 8 1
plimitpl 152 110 0 103 1 0 1 1 0 8 0
sigapl 432 1509 0 1496 2 0 2 2 0 8 0
futexpl 56 42595 0 42595 2 1 1 1 0 8 1
knotepl 112 1183 0 1164 6 4 2 2 0 8 1
kqueuepl 104 1754 0 1752 1 0 1 1 0 8 0
pipepl 112 1714 0 1693 10 8 2 2 0 8 1
fdescpl 424 1510 0 1496 2 0 2 2 0 8 0
filepl 120 17598 0 17499 13 7 6 6 0 8 3
lockfpl 104 600 0 599 1 0 1 1 0 8 0
lockfspl 48 178 0 177 1 0 1 1 0 8 0
sessionpl 112 24 0 14 1 0 1 1 0 8 0
pgrppl 48 42 0 32 1 0 1 1 0 8 0
ucredpl 96 4694 0 4687 1 0 1 1 0 8 0
zombiepl 144 1496 0 1496 1 0 1 1 0 8 1
processpl 864 1526 0 1496 4 0 4 4 0 8 0
procpl 632 3504 0 3466 9 5 4 5 0 8 0
sosppl 128 27 0 27 8 7 1 1 0 8 1
sockpl 384 3223 0 3201 16 10 6 6 0 8 3
mcl64k 65536 170 0 170 7 6 1 1 0 8 1
mcl16k 16384 13 0 13 6 5 1 1 0 8 1
mcl12k 12288 51 0 51 8 7 1 1 0 8 1
mcl9k 9216 24 0 24 9 8 1 1 0 8 1
mcl8k 8192 77 0 77 2 1 1 1 0 8 1
mcl4k 4096 170 0 168 3 2 1 1 0 8 0
mcl2k2 2112 14 0 14 8 7 1 1 0 8 1
mcl2k 2048 69334 0 69283 17 10 7 14 0 8 0
mtagpl 80 74 0 36 3 2 1 1 0 8 0
mbufpl 256 122397 0 122112 65 43 22 29 0 8 1
bufpl 256 14439 0 8323 384 1 383 383 0 8 0
anonpl 16 256555 0 236952 158 63 95 95 0 62 9
amapchunkpl 152 9634 0 9505 38 32 6 15 0 158 0
amappl16 192 11842 0 10734 139 75 64 68 0 8 8
amappl15 184 223 0 222 1 0 1 1 0 8 0
amappl14 176 350 0 346 1 0 1 1 0 8 0
amappl13 168 4 0 4 4 3 1 1 0 8 1
amappl12 160 163 0 159 1 0 1 1 0 8 0
amappl11 152 555 0 542 1 0 1 1 0 8 0
amappl10 144 103 0 102 2 1 1 1 0 8 0
amappl9 136 651 0 644 1 0 1 1 0 8 0
amappl8 128 233 0 203 3 1 2 2 0 8 0
amappl7 120 154 0 148 1 0 1 1 0 8 0
amappl6 112 566 0 555 1 0 1 1 0 8 0
amappl5 104 352 0 342 1 0 1 1 0 8 0
amappl4 96 1682 0 1659 1 0 1 1 0 8 0
amappl3 88 400 0 395 1 0 1 1 0 8 0
amappl2 80 11113 0 11045 3 1 2 3 0 8 0
amappl1 72 37834 0 37428 26 16 10 20 0 8 0
amappl 80 3868 0 3825 3 1 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 71 0 12 1 0 1 1 0 8 0
uaddrrnd 24 1532 0 1496 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1532 0 1496 1 0 1 1 0 8 0
vmmpekpl 168 15647 0 15620 2 0 2 2 0 8 0
vmmpepl 168 193208 0 190998 227 116 111 139 0 357 7
vmsppl 272 1509 0 1496 3 2 1 2 0 8 0
pdppl 4096 3070 0 3023 8 1 7 7 0 8 0
pvpl 32 717447 0 695506 318 105 213 264 0 265 28
pmappl 200 1531 0 1505 2 0 2 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 616 0 89 16 0 16 16 0 8 0