assert "!ISSET(rt->rt_flags, RTF_LOCAL)" failed in nd6.c
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syzbot
Mar 2, 2020, 1:36:14 PM3/2/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 23a32f86 Allow armv7 efiboot(8) to read from an ffs2 files..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15ec5c55e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0eb994ff432ae75e3369
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0eb994...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
497148 3642 0 0 0 0 syz-executor.0
* 39472 3642 0 0 0x4000000 1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727
nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534
in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989
soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138
sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5
syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ae8d76540, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727
nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534
in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989
soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138
sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5
syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ae8d76540, count: -11
ddb{1}> show registers
rdi 0xffffffff81030db7 db_enter+0x17
rsi 0x1fe0f acpi_pdirpa+0xbc77
rbp 0xffff800021b7ec10
rbx 0xffff800021b7ecc0
rdx 0x1fe10 acpi_pdirpa+0xbc78
rcx 0xffff800023bd0000
rax 0xffff800023bd0000
r8 0xffffffff8164a22f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x92d673ad5dc50425
r12 0x3000000008
r13 0xffff800021b7ec20
r14 0x100
r15 0x1
rip 0xffffffff81030db8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021b7ec00
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=39472 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ad6eb8,0xffffffff8262fc20
process=0xffff800020a9cf20 user=0xffff800021b7a000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
3642 497148 34011 0 7 0 syz-executor.0
* 3642 39472 34011 0 7 0x4000000 syz-executor.0
34011 523669 94690 0 3 0x82 nanosleep syz-executor.0
64830 306964 94690 0 3 0x2 biowait syz-executor.1
94885 24282 0 0 3 0x14200 bored sosplice
94690 116276 50418 0 3 0x82 kqread syz-fuzzer
94690 191064 50418 0 3 0x4000082 nanosleep syz-fuzzer
94690 509664 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 451369 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 394882 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 207249 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 198907 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 139368 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 380623 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 374348 50418 0 3 0x4000082 thrsleep syz-fuzzer
50418 521209 90433 0 3 0x10008a pause ksh
90433 196708 3101 0 3 0x92 select sshd
7032 92527 1 0 3 0x100083 ttyin getty
3101 164624 1 0 3 0x80 select sshd
21578 460513 35295 74 3 0x100092 bpf pflogd
35295 127813 1 0 3 0x80 netio pflogd
18604 410574 78010 73 3 0x100090 kqread syslogd
78010 91355 1 0 3 0x100082 netio syslogd
47041 348678 0 0 3 0x14200 bored smr
55740 479740 0 0 3 0x14200 pgzero zerothread
96569 227386 0 0 3 0x14200 aiodoned aiodoned
73358 183881 0 0 3 0x14200 syncer update
39744 199242 0 0 3 0x14200 cleaner cleaner
42182 14683 0 0 3 0x14200 reaper reaper
65126 294800 0 0 3 0x14200 pgdaemon pagedaemon
45354 456405 0 0 3 0x14200 bored crynlk
66716 505028 0 0 3 0x14200 bored crypto
10513 144831 0 0 3 0x40014200 acpi0 acpi0
38760 416575 0 0 3 0x40014200 idle1
31873 489813 0 0 3 0x14200 bored softnet
88593 124288 0 0 2 0x14200 systqmp
99067 236931 0 0 3 0x14200 bored systq
54967 236111 0 0 3 0x40014200 bored softclock
55797 239099 0 0 3 0x40014200 idle0
1 220598 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 3642 (syz-executor.0) thread 0xffff800020ad7ae8 (39472)
exclusive rwlock netlock r = 0 (0xffffffff8249c838)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 ifioctl+0x104b sys/net/if.c:1978
#2 soo_ioctl+0x27c sys/kern/sys_socket.c:138
#3 sys_ioctl+0x4a5
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#5 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82638db0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 soo_ioctl+0x26a sys/kern/sys_socket.c:138
#2 sys_ioctl+0x4a5
#3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#4 Xsyscall+0x128
Process 64830 (syz-executor.1) thread 0xffff800020ad6018 (306964)
exclusive rrwlock inode r = 0 (0xfffffd8068fdd708)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8077b35818)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9531 6361K 6864K 78643K 11797 0
pcb 13 8K 8K 78643K 188 0
rtable 94 12K 12K 78643K 539 0
ifaddr 99 20K 20K 78643K 263 0
counters 43 33K 34K 78643K 101 0
ioctlops 0 0K 4K 78643K 1507 0
iov 0 0K 32K 78643K 98 0
mount 1 1K 1K 78643K 1 0
vnodes 1221 77K 77K 78643K 1626 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 9 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 178 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 639 0
sigio 0 0K 0K 78643K 15 0
proc 62 51K 95K 78643K 606 0
subproc 32 2K 2K 78643K 68 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 83 0
in_multi 96 4K 4K 78643K 231 0
ether_multi 1 0K 0K 78643K 31 0
mrt 0 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 290 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 121 71K 71K 78643K 3179 0
UVM aobj 45 2K 2K 78643K 47 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 133 0
NDP 14 0K 0K 78643K 53 0
temp 140 3026K 3102K 78643K 14574 0
kqueue 3 4K 18K 78643K 63 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 13 0 5 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 83 0 83 1 0 1 1 0 8 1
rtentry 112 89 0 55 2 0 2 2 0 8 0
unpcb 120 578 0 569 1 0 1 1 0 8 0
syncache 264 8 0 8 3 2 1 1 0 8 1
tcpqe 32 66 0 66 2 1 1 1 0 8 1
tcpcb 544 403 0 399 2 1 1 2 0 8 0
inpcb 280 1182 0 1173 3 1 2 2 0 8 1
nd6 48 14 0 10 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 2 0 1 0 8 0
ppxss 1128 5 0 5 3 3 0 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 69 0 36 1 0 1 1 0 8 0
pfstkey 112 69 0 36 2 1 1 2 0 8 0
pfstate 328 69 0 36 4 1 3 4 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 256 459 0 292 14 3 11 13 0 8 0
art_table 32 460 0 292 2 0 2 2 0 8 0
art_node 16 87 0 56 1 0 1 1 0 8 0
sysvmsgpl 40 37 0 16 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 176 0 166 1 0 1 1 0 8 0
shmpl 112 45 0 2 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2290 0 881 46 0 46 46 0 8 0
ffsino 272 2290 0 881 96 1 95 95 0 8 0
nchpl 144 3426 0 1818 61 0 61 61 0 8 0
uvmvnodes 72 2627 0 0 48 0 48 48 0 8 0
vnodes 208 2627 0 0 139 0 139 139 0 8 0
namei 1024 11094 0 11094 2 1 1 1 0 8 1
percpumem 16 61 0 29 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 9 0 2 1 0 1 1 0 8 0
scxspl 192 10502 0 10501 8 7 1 7 0 8 0
plimitpl 152 64 0 57 1 0 1 1 0 8 0
sigapl 424 849 0 819 4 0 4 4 0 8 0
futexpl 56 13425 0 13425 2 1 1 1 0 8 1
knotepl 112 158 0 139 1 0 1 1 0 8 0
kqueuepl 144 223 0 221 1 0 1 1 0 8 0
pipelkpl 48 292 0 282 1 0 1 1 0 8 0
pipepl 120 584 0 565 3 2 1 2 0 8 0
fdescpl 496 833 0 819 3 0 3 3 0 8 0
filepl 152 7031 0 6941 9 4 5 6 0 8 1
lockfpl 104 208 0 208 1 0 1 1 0 8 1
lockfspl 48 77 0 77 1 0 1 1 0 8 1
sessionpl 112 20 0 11 1 0 1 1 0 8 0
pgrppl 48 29 0 20 1 0 1 1 0 8 0
ucredpl 96 542 0 534 1 0 1 1 0 8 0
zombiepl 144 819 0 819 3 2 1 1 0 8 1
processpl 960 849 0 819 5 0 5 5 0 8 0
procpl 624 2284 0 2244 4 0 4 4 0 8 0
sosppl 128 16 0 16 4 3 1 1 0 8 1
sockpl 400 1870 0 1856 7 4 3 5 0 8 1
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 9 0 0 2 0 2 2 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 168 0 0 20 0 20 20 0 8 0
mtagpl 80 63 0 0 2 0 2 2 0 8 0
mbufpl 256 345 0 0 18 0 18 18 0 8 0
bufpl 280 7664 0 1396 448 0 448 448 0 8 0
anonpl 16 110824 0 93175 96 8 88 88 0 124 16
amapchunkpl 152 6039 0 5912 33 26 7 20 0 158 1
amappl16 192 4747 0 3770 78 21 57 62 0 8 8
amappl15 184 12 0 9 1 0 1 1 0 8 0
amappl14 176 85 0 81 2 1 1 1 0 8 0
amappl13 168 37 0 36 1 0 1 1 0 8 0
amappl12 160 18 0 14 2 1 1 1 0 8 0
amappl11 152 82 0 69 1 0 1 1 0 8 0
amappl10 144 25 0 19 1 0 1 1 0 8 0
amappl9 136 784 0 778 1 0 1 1 0 8 0
amappl8 128 755 0 720 4 2 2 2 0 8 0
amappl7 120 140 0 126 1 0 1 1 0 8 0
amappl6 112 21 0 19 2 1 1 1 0 8 0
amappl5 104 728 0 715 1 0 1 1 0 8 0
amappl4 96 546 0 517 2 1 1 2 0 8 0
amappl3 88 195 0 189 1 0 1 1 0 8 0
amappl2 80 5615 0 5552 3 1 2 3 0 8 0
amappl1 72 28510 0 28099 25 15 10 20 0 8 0
amappl 80 2581 0 2538 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 18 0 17 1 0 1 1 0 8 0
aobjpl 64 46 0 2 1 0 1 1 0 8 0
uaddrrnd 24 842 0 821 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 842 0 821 1 0 1 1 0 8 0
vmmpekpl 168 10553 0 10515 2 0 2 2 0 8 0
vmmpepl 168 109937 0 107865 162 47 115 130 0 357 18
vmsppl 368 841 0 821 2 0 2 2 0 8 0
pdppl 4096 1691 0 1649 6 0 6 6 0 8 0
pvpl 32 307933 0 287178 223 17 206 213 0 265 37
pmappl 232 841 0 821 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 185 0 13 5 0 5 5 0 8 0
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 23a32f86 Allow armv7 efiboot(8) to read from an ffs2 files..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15ec5c55e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0eb994ff432ae75e3369
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0eb994...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
497148 3642 0 0 0 0 syz-executor.0
* 39472 3642 0 0 0x4000000 1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727
nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534
in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989
soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138
sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5
syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ae8d76540, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 727
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821e91f1) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8224237e,ffffffff822397a7,2d7,ffffffff82228384) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd80655b1008) at nd6_free+0x1cf sys/netinet6/nd6.c:727
nd6_purge(ffff800000a3d000) at nd6_purge+0x10f sys/netinet6/nd6.c:534
in6_ifdetach(ffff800000a3d000) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
ifioctl(fffffd806f6f3e10,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at ifioctl+0x1652 sys/net/if.c:1989
soo_ioctl(fffffd806fc82980,801169ac,ffff800021b7ef50,ffff800020ad7ae8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138
sys_ioctl(ffff800020ad7ae8,ffff800021b7f068,ffff800021b7f0b0) at sys_ioctl+0x4a5
syscall(ffff800021b7f130) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021b7f130) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ae8d76540, count: -11
ddb{1}> show registers
rdi 0xffffffff81030db7 db_enter+0x17
rsi 0x1fe0f acpi_pdirpa+0xbc77
rbp 0xffff800021b7ec10
rbx 0xffff800021b7ecc0
rdx 0x1fe10 acpi_pdirpa+0xbc78
rcx 0xffff800023bd0000
rax 0xffff800023bd0000
r8 0xffffffff8164a22f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x92d673ad5dc50425
r12 0x3000000008
r13 0xffff800021b7ec20
r14 0x100
r15 0x1
rip 0xffffffff81030db8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021b7ec00
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=39472 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ad6eb8,0xffffffff8262fc20
process=0xffff800020a9cf20 user=0xffff800021b7a000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
3642 497148 34011 0 7 0 syz-executor.0
* 3642 39472 34011 0 7 0x4000000 syz-executor.0
34011 523669 94690 0 3 0x82 nanosleep syz-executor.0
64830 306964 94690 0 3 0x2 biowait syz-executor.1
94885 24282 0 0 3 0x14200 bored sosplice
94690 116276 50418 0 3 0x82 kqread syz-fuzzer
94690 191064 50418 0 3 0x4000082 nanosleep syz-fuzzer
94690 509664 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 451369 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 394882 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 207249 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 198907 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 139368 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 380623 50418 0 3 0x4000082 thrsleep syz-fuzzer
94690 374348 50418 0 3 0x4000082 thrsleep syz-fuzzer
50418 521209 90433 0 3 0x10008a pause ksh
90433 196708 3101 0 3 0x92 select sshd
7032 92527 1 0 3 0x100083 ttyin getty
3101 164624 1 0 3 0x80 select sshd
21578 460513 35295 74 3 0x100092 bpf pflogd
35295 127813 1 0 3 0x80 netio pflogd
18604 410574 78010 73 3 0x100090 kqread syslogd
78010 91355 1 0 3 0x100082 netio syslogd
47041 348678 0 0 3 0x14200 bored smr
55740 479740 0 0 3 0x14200 pgzero zerothread
96569 227386 0 0 3 0x14200 aiodoned aiodoned
73358 183881 0 0 3 0x14200 syncer update
39744 199242 0 0 3 0x14200 cleaner cleaner
42182 14683 0 0 3 0x14200 reaper reaper
65126 294800 0 0 3 0x14200 pgdaemon pagedaemon
45354 456405 0 0 3 0x14200 bored crynlk
66716 505028 0 0 3 0x14200 bored crypto
10513 144831 0 0 3 0x40014200 acpi0 acpi0
38760 416575 0 0 3 0x40014200 idle1
31873 489813 0 0 3 0x14200 bored softnet
88593 124288 0 0 2 0x14200 systqmp
99067 236931 0 0 3 0x14200 bored systq
54967 236111 0 0 3 0x40014200 bored softclock
55797 239099 0 0 3 0x40014200 idle0
1 220598 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 3642 (syz-executor.0) thread 0xffff800020ad7ae8 (39472)
exclusive rwlock netlock r = 0 (0xffffffff8249c838)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 ifioctl+0x104b sys/net/if.c:1978
#2 soo_ioctl+0x27c sys/kern/sys_socket.c:138
#3 sys_ioctl+0x4a5
#4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#5 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82638db0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 soo_ioctl+0x26a sys/kern/sys_socket.c:138
#2 sys_ioctl+0x4a5
#3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#4 Xsyscall+0x128
Process 64830 (syz-executor.1) thread 0xffff800020ad6018 (306964)
exclusive rrwlock inode r = 0 (0xfffffd8068fdd708)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8077b35818)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1860
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9531 6361K 6864K 78643K 11797 0
pcb 13 8K 8K 78643K 188 0
rtable 94 12K 12K 78643K 539 0
ifaddr 99 20K 20K 78643K 263 0
counters 43 33K 34K 78643K 101 0
ioctlops 0 0K 4K 78643K 1507 0
iov 0 0K 32K 78643K 98 0
mount 1 1K 1K 78643K 1 0
vnodes 1221 77K 77K 78643K 1626 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 9 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 178 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 5 13K 25K 78643K 639 0
sigio 0 0K 0K 78643K 15 0
proc 62 51K 95K 78643K 606 0
subproc 32 2K 2K 78643K 68 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 83 0
in_multi 96 4K 4K 78643K 231 0
ether_multi 1 0K 0K 78643K 31 0
mrt 0 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 1K 78643K 290 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 121 71K 71K 78643K 3179 0
UVM aobj 45 2K 2K 78643K 47 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 133 0
NDP 14 0K 0K 78643K 53 0
temp 140 3026K 3102K 78643K 14574 0
kqueue 3 4K 18K 78643K 63 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 13 0 5 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 83 0 83 1 0 1 1 0 8 1
rtentry 112 89 0 55 2 0 2 2 0 8 0
unpcb 120 578 0 569 1 0 1 1 0 8 0
syncache 264 8 0 8 3 2 1 1 0 8 1
tcpqe 32 66 0 66 2 1 1 1 0 8 1
tcpcb 544 403 0 399 2 1 1 2 0 8 0
inpcb 280 1182 0 1173 3 1 2 2 0 8 1
nd6 48 14 0 10 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 2 0 1 0 8 0
ppxss 1128 5 0 5 3 3 0 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 69 0 36 1 0 1 1 0 8 0
pfstkey 112 69 0 36 2 1 1 2 0 8 0
pfstate 328 69 0 36 4 1 3 4 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 256 459 0 292 14 3 11 13 0 8 0
art_table 32 460 0 292 2 0 2 2 0 8 0
art_node 16 87 0 56 1 0 1 1 0 8 0
sysvmsgpl 40 37 0 16 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 176 0 166 1 0 1 1 0 8 0
shmpl 112 45 0 2 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 2290 0 881 46 0 46 46 0 8 0
ffsino 272 2290 0 881 96 1 95 95 0 8 0
nchpl 144 3426 0 1818 61 0 61 61 0 8 0
uvmvnodes 72 2627 0 0 48 0 48 48 0 8 0
vnodes 208 2627 0 0 139 0 139 139 0 8 0
namei 1024 11094 0 11094 2 1 1 1 0 8 1
percpumem 16 61 0 29 1 0 1 1 0 8 0
vcpupl 1984 7 0 0 1 0 1 1 0 8 0
vmpool 560 9 0 2 1 0 1 1 0 8 0
scxspl 192 10502 0 10501 8 7 1 7 0 8 0
plimitpl 152 64 0 57 1 0 1 1 0 8 0
sigapl 424 849 0 819 4 0 4 4 0 8 0
futexpl 56 13425 0 13425 2 1 1 1 0 8 1
knotepl 112 158 0 139 1 0 1 1 0 8 0
kqueuepl 144 223 0 221 1 0 1 1 0 8 0
pipelkpl 48 292 0 282 1 0 1 1 0 8 0
pipepl 120 584 0 565 3 2 1 2 0 8 0
fdescpl 496 833 0 819 3 0 3 3 0 8 0
filepl 152 7031 0 6941 9 4 5 6 0 8 1
lockfpl 104 208 0 208 1 0 1 1 0 8 1
lockfspl 48 77 0 77 1 0 1 1 0 8 1
sessionpl 112 20 0 11 1 0 1 1 0 8 0
pgrppl 48 29 0 20 1 0 1 1 0 8 0
ucredpl 96 542 0 534 1 0 1 1 0 8 0
zombiepl 144 819 0 819 3 2 1 1 0 8 1
processpl 960 849 0 819 5 0 5 5 0 8 0
procpl 624 2284 0 2244 4 0 4 4 0 8 0
sosppl 128 16 0 16 4 3 1 1 0 8 1
sockpl 400 1870 0 1856 7 4 3 5 0 8 1
mcl64k 65536 9 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 9 0 0 2 0 2 2 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 168 0 0 20 0 20 20 0 8 0
mtagpl 80 63 0 0 2 0 2 2 0 8 0
mbufpl 256 345 0 0 18 0 18 18 0 8 0
bufpl 280 7664 0 1396 448 0 448 448 0 8 0
anonpl 16 110824 0 93175 96 8 88 88 0 124 16
amapchunkpl 152 6039 0 5912 33 26 7 20 0 158 1
amappl16 192 4747 0 3770 78 21 57 62 0 8 8
amappl15 184 12 0 9 1 0 1 1 0 8 0
amappl14 176 85 0 81 2 1 1 1 0 8 0
amappl13 168 37 0 36 1 0 1 1 0 8 0
amappl12 160 18 0 14 2 1 1 1 0 8 0
amappl11 152 82 0 69 1 0 1 1 0 8 0
amappl10 144 25 0 19 1 0 1 1 0 8 0
amappl9 136 784 0 778 1 0 1 1 0 8 0
amappl8 128 755 0 720 4 2 2 2 0 8 0
amappl7 120 140 0 126 1 0 1 1 0 8 0
amappl6 112 21 0 19 2 1 1 1 0 8 0
amappl5 104 728 0 715 1 0 1 1 0 8 0
amappl4 96 546 0 517 2 1 1 2 0 8 0
amappl3 88 195 0 189 1 0 1 1 0 8 0
amappl2 80 5615 0 5552 3 1 2 3 0 8 0
amappl1 72 28510 0 28099 25 15 10 20 0 8 0
amappl 80 2581 0 2538 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 18 0 17 1 0 1 1 0 8 0
aobjpl 64 46 0 2 1 0 1 1 0 8 0
uaddrrnd 24 842 0 821 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 842 0 821 1 0 1 1 0 8 0
vmmpekpl 168 10553 0 10515 2 0 2 2 0 8 0
vmmpepl 168 109937 0 107865 162 47 115 130 0 357 18
vmsppl 368 841 0 821 2 0 2 2 0 8 0
pdppl 4096 1691 0 1649 6 0 6 6 0 8 0
pvpl 32 307933 0 287178 223 17 206 213 0 265 37
pmappl 232 841 0 821 2 0 2 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 185 0 13 5 0 5 5 0 8 0
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
Anton Lindqvist
Apr 22, 2020, 4:19:13 PM4/22/20
to syzbot, syzkaller-o...@googlegroups.com
#syz fix: Never update the ND entry (cache) corresponding to a RTF_LOCAL route.
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