panic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 954
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*109118 20232 0 0 0x4000000 0K syz-executor.5
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258741b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff825fc523,ffffffff825f266d,3ba,ffffffff8259b7f1) at __assert+0x25 sys/kern/subr_prf.c:161
nd6_rtrequest(ffff800000e33800,b,fffffd8067aac398) at nd6_rtrequest+0x8c3 sys/netinet6/nd6.c:954
rtrequest(b,ffff800027ab6118,83,ffff800027ab61b8,0) at rtrequest+0xa1c sys/net/route.c:981
rt_clone(ffff800027ab6220,ffff800027ab6290,0) at rt_clone+0x78 sys/net/route.c:265
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d rt_match sys/net/route.c:243 [inline]
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d sys/net/route.c:371
ip6_setmoptions(c,fffffd806f67adf8,fffffd80680ca900,0) at ip6_setmoptions+0x5e2 sys/netinet6/ip6_output.c:2013
sys_setsockopt(ffff80002e36a008,ffff800027ab63a8,ffff800027ab6400) at sys_setsockopt+0x1fd sys/kern/uipc_syscalls.c:968
syscall(ffff800027ab6470) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800027ab6470) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75b17c728b0, 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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 954
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258741b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff825fc523,ffffffff825f266d,3ba,ffffffff8259b7f1) at __assert+0x25 sys/kern/subr_prf.c:161
nd6_rtrequest(ffff800000e33800,b,fffffd8067aac398) at nd6_rtrequest+0x8c3 sys/netinet6/nd6.c:954
rtrequest(b,ffff800027ab6118,83,ffff800027ab61b8,0) at rtrequest+0xa1c sys/net/route.c:981
rt_clone(ffff800027ab6220,ffff800027ab6290,0) at rt_clone+0x78 sys/net/route.c:265
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d rt_match sys/net/route.c:243 [inline]
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d sys/net/route.c:371
ip6_setmoptions(c,fffffd806f67adf8,fffffd80680ca900,0) at ip6_setmoptions+0x5e2 sys/netinet6/ip6_output.c:2013
sys_setsockopt(ffff80002e36a008,ffff800027ab63a8,ffff800027ab6400) at sys_setsockopt+0x1fd sys/kern/uipc_syscalls.c:968
syscall(ffff800027ab6470) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800027ab6470) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75b17c728b0, count: -11
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800027ab5e60
rbx 0xffffffff82922bff cpu_info_full_primary+0x2bff
rdx 0xffff800000becc40
rcx 0
rax 0xffff80002e36a008
r8 0
r9 0x8080808080808080
r10 0x57ae39ce6915e6ef
r11 0xc76fcbf11a27fe6d
r12 0xffffffff82922a00 cpu_info_full_primary+0x2a00
r13 0
r14 0
r15 0x1
rip 0xffffffff822ade58 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800027ab5e50
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.5) pid=109118 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=84, nice=20
forw=0xffffffffffffffff, list=0xffff80002e36b268,0xffff8000ffff4a90
process=0xffff8000fffed0b8 user=0xffff800027ab1000, vmspace=0xfffffd805cc085c0
estcpu=34, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
15840 430465 92074 0 2 0 syz-executor.2
15840 318093 92074 0 3 0x4000080 fsleep syz-executor.2
77740 126532 70921 0 2 0 syz-executor.6
77740 231228 70921 0 3 0x4000080 fsleep syz-executor.6
73361 54753 85223 0 2 0 syz-executor.3
73361 270613 85223 0 3 0x4000080 fsleep syz-executor.3
93753 260563 92292 0 2 0 syz-executor.4
93753 411262 92292 0 3 0x4000080 fsleep syz-executor.4
60792 283369 13835 0 2 0 syz-executor.0
60792 127777 13835 0 3 0x4000080 fsleep syz-executor.0
20232 138411 41560 0 2 0 syz-executor.5
*20232 109118 41560 0 7 0x4000000 syz-executor.5
95480 124429 8121 0 2 0x482 syz-executor.7
70921 192431 8121 0 2 0x482 syz-executor.6
85223 245855 8121 0 3 0x82 nanoslp syz-executor.3
92003 428524 8121 0 3 0x82 nanoslp syz-executor.1
70344 425158 1 0 3 0x100083 ttyin getty
13835 148397 8121 0 3 0x82 nanoslp syz-executor.0
92074 75596 8121 0 3 0x82 nanoslp syz-executor.2
92292 147937 8121 0 3 0x82 nanoslp syz-executor.4
41560 372295 8121 0 3 0x82 nanoslp syz-executor.5
60204 148418 0 0 3 0x14200 acct acct
72852 316328 0 0 3 0x14200 bored sosplice
8121 110457 953 0 3 0x82 thrsleep syz-fuzzer
8121 173834 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 498832 953 0 3 0x4000082 kqread syz-fuzzer
8121 121288 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 207531 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 126884 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 295684 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 422463 953 0 3 0x4000082 thrsleep syz-fuzzer
8121 369659 953 0 3 0x4000082 thrsleep syz-fuzzer
953 148011 73035 0 3 0x10008a sigsusp ksh
73035 215307 20608 0 3 0x9a kqread sshd
20608 424857 1 0 3 0x88 kqread sshd
61677 144294 49344 74 3 0x1100092 bpf pflogd
49344 28354 1 0 3 0x80 netio pflogd
69215 38427 39664 73 3 0x1100090 kqread syslogd
39664 84904 1 0 3 0x100082 netio syslogd
48394 59770 1 0 3 0x100080 kqread resolvd
36547 444636 2227 77 3 0x100092 kqread dhcpleased
67735 265452 2227 77 3 0x100092 kqread dhcpleased
2227 224143 1 0 3 0x80 kqread dhcpleased
93900 367715 0 0 3 0x14200 bored smr
53707 431424 0 0 2 0x14200 zerothread
30451 203095 0 0 3 0x14200 aiodoned aiodoned
85594 291673 0 0 3 0x14200 syncer update
15036 378481 0 0 3 0x14200 cleaner cleaner
78145 279310 0 0 3 0x14200 reaper reaper
51139 18725 0 0 3 0x14200 pgdaemon pagedaemon
58200 265062 0 0 3 0x14200 bored viomb
95271 6906 0 0 3 0x40014200 acpi0 acpi0
82542 162307 0 0 7 0x40014200 idle1
24193 316975 0 0 3 0x14200 bored softnet
45425 260374 0 0 3 0x14200 bored systqmp
9159 46601 0 0 3 0x14200 bored systq
42211 309064 0 0 2 0x40014200 softclock
46918 111567 0 0 3 0x40014200 idle0
1 469997 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 20232 (syz-executor.5) thread 0xffff80002e36a008 (109118)
exclusive rwlock netlock r = 0 (0xffffffff829850b0)
#0 witness_lock+0x44d
#1 solock+0x86 sys/kern/uipc_socket2.c:295
#2 sys_setsockopt+0x1e2 sys/kern/uipc_syscalls.c:967
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829c5130)
#0 witness_lock+0x44d
#1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10235 6521K 8938K 78643K 31166 0
pcb 14 22K 26K 78643K 9823 0
rtable 222 16K 25K 78643K 4886 0
ifaddr 105 23K 25K 78643K 2183 0
sysctl 2 0K 4K 78643K 6 0
counters 58 35K 36K 78643K 298 0
ioctlops 0 0K 8K 78643K 5396 0
iov 0 0K 32K 78643K 1406 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1559 97K 98K 78643K 7471 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 169 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 1717 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 16 57K 85K 78643K 12959 0
sigio 1 0K 0K 78643K 47 0
proc 71 87K 111K 78643K 1866 0
subproc 104 6K 6K 78643K 549 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 1 0K 0K 78643K 768 0
in_multi 92 6K 6K 78643K 959 0
ether_multi 1 0K 0K 78643K 159 0
mrt 1 0K 0K 78643K 47 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 295 1314K 1314K 78643K 295 0
exec 0 0K 2K 78643K 2621 0
pfkey data 0 0K 1K 78643K 3 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 7 26K 26K 78643K 7 0
UVM amap 596 869K 874K 78643K 165625 0
UVM aobj 131 4K 4K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 1 0K 1K 78643K 3855 0
NDP 16 0K 1K 78643K 237 0
temp 177 4769K 4857K 78643K 113613 0
kqueue 12 18K 28K 78643K 631 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 757 0 754 10 9 1 3 0 8 0
rtentry 112 685 0 592 4 1 3 4 0 8 0
unpcb 136 5052 0 5037 65 62 3 6 0 8 2
syncache 296 43 0 43 16 16 0 1 0 8 0
tcpqe 32 57 0 57 7 7 0 1 0 8 0
tcpcb 736 3444 0 3436 115 113 2 19 0 8 1
arp 120 100 0 82 1 0 1 1 0 8 0
inpcb 304 31394 0 31382 286 277 9 21 0 8 8
rttmr 72 12 0 12 4 4 0 1 0 8 0
nd6 48 167 0 148 1 0 1 1 0 8 0
pkpcb 40 53 0 53 9 9 0 1 0 8 0
kcovpl 48 42 0 34 1 0 1 1 0 8 0
ppxss 1248 40 0 40 13 13 0 1 0 8 0
pfstscr 40 127 0 127 7 7 0 1 0 8 0
pffrag 232 68 0 67 5 4 1 1 0 482 0
pffrnode 88 64 0 63 5 4 1 1 0 8 0
pffrent 40 287 0 286 6 5 1 1 0 8 0
pfosfp 40 1439 0 1014 5 0 5 5 0 8 0
pfosfpen 112 1439 0 719 21 0 21 21 0 8 0
pfrktable 1344 1363 0 1361 9 8 1 2 0 8 0
pftag 88 26 0 18 1 0 1 1 0 8 0
pfqueue 264 74 0 74 3 3 0 1 0 8 0
pfstitem 24 51 0 49 1 0 1 1 0 8 0
pfstkey 112 350 0 348 1 0 1 1 0 8 0
pfstate 320 193 0 191 2 1 1 2 0 8 0
pfrule 1360 1372 0 1354 24 22 2 20 0 8 0
art_heap8 4096 2 0 1 2 1 1 2 0 8 0
art_heap4 256 3203 0 2808 48 17 31 31 0 8 0
art_table 32 3205 0 2809 4 0 4 4 0 8 0
art_node 16 683 0 600 1 0 1 1 0 8 0
sysvmsgpl 40 98 0 58 1 0 1 1 0 8 0
semapl 112 1715 0 1705 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 18414 0 16938 93 0 93 93 0 8 0
ffsino 272 18414 0 16938 99 0 99 99 0 8 0
nchpl 144 34968 0 33341 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 119716 0 119716 6 5 1 2 0 8 1
percpumem 16 161 0 120 1 0 1 1 0 8 0
vcpupl 2048 120 0 1 15 0 15 15 0 8 0
vmpool 560 141 0 22 9 0 9 9 0 8 0
pfiaddrpl 120 404 0 395 4 3 1 1 0 8 0
scsiplug 72 5 0 5 2 2 0 1 0 8 0
scxspl 216 107976 0 107976 22 21 1 8 0 8 1
plimitpl 152 1450 0 1435 1 0 1 1 0 8 0
sigapl 424 13215 0 13168 8 1 7 8 0 8 0
futexpl 64 126761 0 126756 8 7 1 1 0 8 0
knotepl 120 766 0 0 8 0 8 8 0 8 0
kqueuepl 216 2124 0 2115 48 47 1 5 0 8 0
pipepl 336 2280 0 2251 58 52 6 8 0 8 3
fdescpl 496 13179 0 13150 5 1 4 5 0 8 0
filepl 152 97541 0 97293 155 138 17 22 0 8 7
lockfpl 104 3443 0 3441 8 7 1 2 0 8 0
lockfspl 48 940 0 938 1 0 1 1 0 8 0
sessionpl 144 60 0 43 1 0 1 1 0 8 0
pgrppl 48 653 0 636 1 0 1 1 0 8 0
ucredpl 96 10249 0 10237 1 0 1 1 0 8 0
zombiepl 144 13170 0 13168 2 1 1 1 0 8 0
processpl 1064 13215 0 13168 5 0 5 5 0 8 0
procpl 672 37400 0 37339 28 21 7 9 0 8 0
srpgc 96 55 0 55 14 13 1 1 0 8 1
sosppl 168 120 0 120 17 17 0 1 0 8 0
sockpl 480 37405 0 37373 671 657 14 46 0 8 8
mcl64k 65536 34 0 0 3 0 3 3 0 8 0
mcl16k 16384 17 0 0 3 1 2 3 0 8 0
mcl12k 12288 27 0 0 2 0 2 2 0 8 0
mcl9k 9216 22 0 0 2 0 2 2 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 26 0 0 4 1 3 3 0 8 0
mcl2k2 2112 10 0 0 1 0 1 1 0 8 0
mcl2k 2048 282 0 0 19 4 15 19 0 8 0
mtagpl 96 692 0 0 12 0 12 12 0 8 0
mbufpl 256 1197 0 0 52 0 52 52 0 8 0
bufpl 288 21791 0 15455 453 0 453 453 0 8 0
anonpl 24 3951528 0 3931328 508 350 158 205 0 186 12
amapchunkpl 152 407883 0 406925 161 120 41 71 0 158 0
amappl16 200 43144 0 42389 255 207 48 53 0 8 8
amappl15 192 1823 0 1818 1 0 1 1 0 8 0
amappl14 184 3084 0 3079 1 0 1 1 0 8 0
amappl13 176 1263 0 1257 1 0 1 1 0 8 0
amappl12 168 1765 0 1758 2 1 1 1 0 8 0
amappl11 160 1549 0 1534 1 0 1 1 0 8 0
amappl10 152 1532 0 1527 1 0 1 1 0 8 0
amappl9 144 907 0 903 1 0 1 1 0 8 0
amappl8 136 3592 0 3430 6 0 6 6 0 8 0
amappl7 128 2248 0 2230 1 0 1 1 0 8 0
amappl6 120 779 0 750 3 2 1 2 0 8 0
amappl5 112 11465 0 11447 1 0 1 1 0 8 0
amappl4 104 5064 0 5026 4 2 2 2 0 8 0
amappl3 96 3048 0 3033 1 0 1 1 0 8 0
amappl2 88 3587 0 3527 3 1 2 3 0 8 0
amappl1 80 241057 0 240466 26 12 14 19 0 8 0
amappl 88 164112 0 163767 10 1 9 9 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 13320 0 13172 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 13320 0 13172 1 0 1 1 0 8 0
vmmpekpl 168 98775 0 98709 4 0 4 4 0 8 0
vmmpepl 168 1211851 0 1208725 412 247 165 165 0 357 20
vmsppl 368 13319 0 13172 15 1 14 14 0 8 0
rwobjpl 56 301356 0 293367 138 21 117 117 0 8 0
pdppl 4096 26647 0 26463 688 500 188 188 0 8 4
pvpl 32 6598198 0 6574504 776 533 243 334 0 265 19
pmappl 248 13319 0 13172 11 1 10 10 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 1706 0 719 29 0 29 29 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8258741b) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff825fc523,ffffffff825f266d,3ba,ffffffff8259b7f1) at __assert+0x25 sys/kern/subr_prf.c:161
nd6_rtrequest(ffff800000e33800,b,fffffd8067aac398) at nd6_rtrequest+0x8c3 sys/netinet6/nd6.c:954
rtrequest(b,ffff800027ab6118,83,ffff800027ab61b8,0) at rtrequest+0xa1c sys/net/route.c:981
rt_clone(ffff800027ab6220,ffff800027ab6290,0) at rt_clone+0x78 sys/net/route.c:265
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d rt_match sys/net/route.c:243 [inline]
rtalloc(ffff800027ab6290,1,0) at rtalloc+0x8d sys/net/route.c:371
ip6_setmoptions(c,fffffd806f67adf8,fffffd80680ca900,0) at ip6_setmoptions+0x5e2 sys/netinet6/ip6_output.c:2013
sys_setsockopt(ffff80002e36a008,ffff800027ab63a8,ffff800027ab6400) at sys_setsockopt+0x1fd sys/kern/uipc_syscalls.c:968
syscall(ffff800027ab6470) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800027ab6470) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75b17c728b0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5