�쪠�0te-b�Y��Z�panic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*249022 80873 0 0 0x4000000 1K syz-executor.0
80212 92134 0 0x2 0x4000001 0 syz-fuzzer
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(ffffffff822085d0,ffffffff82200bdf,3b3,ffffffff821c2eb0) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_rtrequest(ffff800000a68000,1,fffffd8066596d28) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947
rtrequest(1,ffff800022bc7058,1,ffff800022bc7128,0) at rtrequest+0x9bf sys/net/route.c:973
rt_ifa_add(ffff800000b06a00,240404,ffff800000b06a58,0) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000b06a00) at rt_ifa_addlocal+0x16d sys/net/route.c:1242
in_ifinit(ffff800000a68000,ffff800000b06a00,ffff800022bc7450,1) at in_ifinit+0x1cf sys/netinet/in.c:614
in_ioctl_sifaddr(8020690c,ffff800022bc7440,ffff800000a68000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360
in_ioctl(8020690c,ffff800022bc7440,ffff800000a68000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd80630c84e8,8020690c,ffff800022bc7440,ffff800020ab0c70) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020ab0c70,ffff800022bc7558,ffff800022bc75a0) at sys_ioctl+0x5b9
syscall(ffff800022bc7620) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800022bc7620) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,9328dbdb010) at Xsyscall+0x128
end of kernel
end trace frame: 0x934ff2afff0, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947
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
__assert(ffffffff822085d0,ffffffff82200bdf,3b3,ffffffff821c2eb0) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_rtrequest(ffff800000a68000,1,fffffd8066596d28) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947
rtrequest(1,ffff800022bc7058,1,ffff800022bc7128,0) at rtrequest+0x9bf sys/net/route.c:973
rt_ifa_add(ffff800000b06a00,240404,ffff800000b06a58,0) at rt_ifa_add+0x290 sys/net/route.c:1133
rt_ifa_addlocal(ffff800000b06a00) at rt_ifa_addlocal+0x16d sys/net/route.c:1242
in_ifinit(ffff800000a68000,ffff800000b06a00,ffff800022bc7450,1) at in_ifinit+0x1cf sys/netinet/in.c:614
in_ioctl_sifaddr(8020690c,ffff800022bc7440,ffff800000a68000,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360
in_ioctl(8020690c,ffff800022bc7440,ffff800000a68000,1) at in_ioctl+0x1e7 sys/netinet/in.c:231
ifioctl(fffffd80630c84e8,8020690c,ffff800022bc7440,ffff800020ab0c70) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020ab0c70,ffff800022bc7558,ffff800022bc75a0) at sys_ioctl+0x5b9
syscall(ffff800022bc7620) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800022bc7620) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,9328dbdb010) at Xsyscall+0x128
end of kernel
end trace frame: 0x934ff2afff0, count: -14
ddb{1}> show registers
rdi 0xffffffff81397877 db_enter+0x17
rsi 0x4a78 __ALIGN_SIZE+0x3a78
rbp 0xffff800022bc6d90
rbx 0xffff800022bc6e40
rdx 0x4a79 __ALIGN_SIZE+0x3a79
rcx 0xffff800020b7c000
rax 0xffff800020b7c000
r8 0xffffffff821776bf kprintf+0x16f
r9 0x1
r10 0x25
r11 0xe251b5939b0f4b23
r12 0x3000000008
r13 0xffff800022bc6da0
r14 0x100
r15 0x1
rip 0xffffffff81397878 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800022bc6d80
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=249022 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab0290,0xffff800020ab0028
process=0xffff800020addc00 user=0xffff800022bc2000, vmspace=0xfffffd807f00b2e0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
86938 523858 11058 0 2 0 syz-executor.1
80873 317647 93988 0 2 0 syz-executor.0
*80873 249022 93988 0 7 0x4000000 syz-executor.0
80873 268469 93988 0 3 0x4000080 fsleep syz-executor.0
11058 381334 92134 0 3 0x82 nanosleep syz-executor.1
93988 177526 92134 0 3 0x82 nanosleep syz-executor.0
20769 257073 0 0 3 0x14200 bored sosplice
92134 13500 60409 0 3 0x82 thrsleep syz-fuzzer
92134 414861 60409 0 3 0x4000082 nanosleep syz-fuzzer
92134 113848 60409 0 3 0x4000082 thrsleep syz-fuzzer
92134 495625 60409 0 3 0x4000082 thrsleep syz-fuzzer
92134 247827 60409 0 3 0x4000082 kqread syz-fuzzer
92134 204970 60409 0 3 0x4000082 thrsleep syz-fuzzer
92134 31085 60409 0 3 0x4000082 thrsleep syz-fuzzer
92134 243186 60409 0 3 0x4000082 thrsleep syz-fuzzer
92134 80212 60409 0 7 0x4000003 syz-fuzzer
92134 221524 60409 0 3 0x4000082 nanosleep syz-fuzzer
60409 477470 13377 0 3 0x10008a pause ksh
13377 218481 73126 0 3 0x92 select sshd
4615 341856 1 0 3 0x100083 ttyin getty
73126 6141 1 0 3 0x80 select sshd
28240 31301 2238 74 3 0x100092 bpf pflogd
2238 288709 1 0 3 0x80 netio pflogd
24061 230153 94181 73 3 0x100090 kqread syslogd
94181 387764 1 0 3 0x100082 netio syslogd
10850 406277 1 77 3 0x100090 poll dhclient
90148 383860 1 0 3 0x80 poll dhclient
20152 273540 0 0 2 0x14200 zerothread
16985 496194 0 0 3 0x14200 aiodoned aiodoned
49919 116620 0 0 3 0x14200 syncer update
76012 113263 0 0 3 0x14200 cleaner cleaner
90685 280557 0 0 3 0x14200 reaper reaper
54211 369323 0 0 3 0x14200 pgdaemon pagedaemon
67205 353077 0 0 3 0x14200 bored crynlk
47843 469720 0 0 3 0x14200 bored crypto
18121 382675 0 0 3 0x40014200 acpi0 acpi0
25674 215509 0 0 3 0x40014200 idle1
67942 272344 0 0 3 0x14200 bored softnet
89855 306299 0 0 3 0x14200 bored systqmp
76207 173831 0 0 3 0x14200 bored systq
3015 320137 0 0 3 0x40014200 bored softclock
12922 342159 0 0 3 0x40014200 idle0
65654 78374 0 0 3 0x14200 bored smr
1 338557 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 80873 (syz-executor.0) thread 0xffff800020ab0c70 (249022)
exclusive rwlock netlock r = 0 (0xffffffff824d2b38)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 in_ioctl_sifaddr+0x69
#2 in_ioctl+0x1e7 sys/netinet/in.c:231
#3 ifioctl+0xb64 sys/net/if.c:2202
#4 sys_ioctl+0x5b9
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82672458)
#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 9595 6441K 7046K 78643K 16914 0 0
pcb 13 8K 8K 78643K 492 0 0
rtable 118 13K 13K 78643K 1687 0 0
ifaddr 92 20K 21K 78643K 530 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1563 0 0
iov 0 0K 20K 78643K 421 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1231 77K 78K 78643K 3834 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 27 13K 13K 78643K 31 0 0
sem 12 0K 0K 78643K 484 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 2230 0 0
sigio 0 0K 0K 78643K 58 0 0
proc 61 63K 95K 78643K 1202 0 0
subproc 32 2K 2K 78643K 276 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 224 0 0
in_multi 34 2K 2K 78643K 291 0 0
ether_multi 1 0K 0K 78643K 25 0 0
mrt 1 0K 0K 78643K 16 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 72 318K 318K 78643K 72 0 0
exec 0 0K 1K 78643K 627 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 160 218K 219K 78643K 8984 0 0
UVM aobj 130 9K 9K 78643K 131 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 526 0 0
NDP 22 0K 0K 78643K 163 0 0
temp 243 3565K 4204K 78643K 103318 0 0
kqueue 0 0K 0K 78643K 17 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 60 0 55 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 209 0 207 1 0 1 1 0 8 0
rtentry 112 272 0 228 2 0 2 2 0 8 0
unpcb 120 1353 0 1340 2 1 1 2 0 8 0
syncache 264 10 0 10 4 4 0 1 0 8 0
tcpqe 32 83 0 83 4 4 0 1 0 8 0
tcpcb 544 1502 0 1495 6 5 1 2 0 8 0
inpcb 280 3919 0 3907 9 7 2 3 0 8 1
rttmr 72 5 0 5 4 4 0 1 0 8 0
ip6q 72 4 0 4 1 1 0 1 0 8 0
ip6af 40 12 0 12 1 1 0 1 0 8 0
nd6 48 37 0 31 3 2 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
ppxss 1128 63 0 63 7 7 0 1 0 8 0
pffrag 232 69 0 69 8 7 1 1 0 482 1
pffrnode 88 67 0 67 8 7 1 1 0 8 1
pffrent 40 2387 0 2387 8 7 1 1 0 8 1
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 24 492 0 309 2 0 2 2 0 8 0
pfstkey 112 492 0 309 7 1 6 6 0 8 0
pfstate 328 492 0 308 18 2 16 16 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 4 0 3 3 2 1 3 0 8 0
art_heap4 256 1101 0 862 28 13 15 16 0 8 0
art_table 32 1105 0 865 2 0 2 2 0 8 0
art_node 16 271 0 231 1 0 1 1 0 8 0
sysvmsgpl 40 38 0 26 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 482 0 472 1 0 1 1 0 8 0
shmpl 112 129 0 1 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 4778 0 3365 46 0 46 46 0 8 0
ffsino 272 4778 0 3365 95 0 95 95 0 8 0
nchpl 144 8124 0 7670 61 38 23 61 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 208 5926 0 0 312 0 312 312 0 8 0
namei 1024 27690 0 27690 1 0 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 25 0 0 4 0 4 4 0 8 0
vmpool 552 29 0 4 2 0 2 2 0 8 0
scsiplug 64 1 0 1 1 1 0 1 0 8 0
scxspl 192 26617 0 26617 20 17 3 7 0 8 3
plimitpl 152 233 0 225 1 0 1 1 0 8 0
sigapl 432 2388 0 2372 3 1 2 3 0 8 0
futexpl 56 52485 0 52484 1 0 1 1 0 8 0
knotepl 112 689 0 670 4 3 1 3 0 8 0
kqueuepl 104 534 0 532 1 0 1 1 0 8 0
pipepl 112 1316 0 1297 3 2 1 2 0 8 0
fdescpl 488 2389 0 2372 3 0 3 3 0 8 0
filepl 152 19214 0 19110 13 8 5 7 0 8 1
lockfpl 104 867 0 866 1 0 1 1 0 8 0
lockfspl 48 293 0 292 1 0 1 1 0 8 0
sessionpl 112 32 0 21 1 0 1 1 0 8 0
pgrppl 48 61 0 50 1 0 1 1 0 8 0
ucredpl 96 2309 0 2299 1 0 1 1 0 8 0
zombiepl 144 2374 0 2374 1 0 1 1 0 8 1
processpl 896 2407 0 2374 4 0 4 4 0 8 0
procpl 632 7432 0 7388 5 0 5 5 0 8 1
srpgc 64 19 0 19 8 8 0 1 0 8 0
sosppl 128 43 0 43 8 8 0 1 0 8 0
sockpl 384 5529 0 5502 15 11 4 5 0 8 1
mcl64k 65536 265 0 0 34 2 32 34 0 8 0
mcl16k 16384 13 0 0 2 0 2 2 0 8 0
mcl12k 12288 21 0 0 2 0 2 2 0 8 0
mcl9k 9216 14 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 8 0 0 1 0 1 1 0 8 0
mcl2k 2048 190 0 0 23 1 22 23 0 8 0
mtagpl 80 39 0 0 1 0 1 1 0 8 0
mbufpl 256 756 0 0 43 0 43 43 0 8 0
bufpl 256 12752 0 5704 441 0 441 441 0 8 0
anonpl 16 298400 0 279567 152 69 83 94 0 124 3
amapchunkpl 152 18698 0 18539 53 43 10 21 0 158 2
amappl16 192 12986 0 11933 140 77 63 65 0 8 8
amappl15 184 153 0 153 1 1 0 1 0 8 0
amappl14 176 455 0 451 1 0 1 1 0 8 0
amappl13 168 312 0 312 1 1 0 1 0 8 0
amappl12 160 119 0 115 2 1 1 1 0 8 0
amappl11 152 501 0 484 1 0 1 1 0 8 0
amappl10 144 340 0 336 1 0 1 1 0 8 0
amappl9 136 904 0 896 1 0 1 1 0 8 0
amappl8 128 494 0 454 2 0 2 2 0 8 0
amappl7 120 430 0 421 1 0 1 1 0 8 0
amappl6 112 487 0 472 1 0 1 1 0 8 0
amappl5 104 352 0 336 1 0 1 1 0 8 0
amappl4 96 2644 0 2610 1 0 1 1 0 8 0
amappl3 88 883 0 875 1 0 1 1 0 8 0
amappl2 80 17468 0 17391 3 1 2 3 0 8 0
amappl1 72 64427 0 63982 26 16 10 20 0 8 0
amappl 80 7977 0 7914 2 0 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 64 130 0 1 3 0 3 3 0 8 0
uaddrrnd 24 2418 0 2372 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2418 0 2372 1 0 1 1 0 8 0
vmmpekpl 168 22279 0 22244 2 0 2 2 0 8 0
vmmpepl 168 313045 0 310703 242 97 145 150 0 357 39
vmsppl 368 2388 0 2372 2 0 2 2 0 8 0
pdppl 4096 4843 0 4777 9 0 9 9 0 8 0
pvpl 32 808264 0 786142 282 86 196 224 0 265 10
pmappl 232 2417 0 2376 4 1 3 3 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 700 0 26 20 0 20 20 0 8 0