g
Γg
Γpanic: kernel diagnostic assertion "rt->rt_ifa->ifa_ifp != NULL" failed: file "/syzkaller/managerspanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
61827 33955 0 0 0x4000000 0 syz-executor.0
*329702 33955 0 0 0x4000000 1 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(ffffffff82206dec,ffffffff821f4f4f,2b2,ffffffff821d6fd3) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 11
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 "rt->rt_ifa->ifa_ifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 848
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(ffffffff82206dec,ffffffff821f4f4f,2b2,ffffffff821d6fd3) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800023d9daf0
rbx 0xffff800023d9dba0
rdx 0xffff800020abe018
rcx 0
rax 0
r8 0xffffffff819b183f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xfc8669f46f08e455
r12 0x3000000008
r13 0xffff800023d9db00
r14 0x104
r15 0x1
rip 0xffffffff8195ee38 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800023d9dae0
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=329702 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020abe780,0xffff800020ac0298
process=0xffff800020add500 user=0xffff800023d98000, vmspace=0xfffffd807f00b450
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18869 221700 90590 0 2 0 syz-executor.1
33955 69687 99978 0 2 0 syz-executor.0
33955 61827 99978 0 7 0x4000000 syz-executor.0
*33955 329702 99978 0 7 0x4000000 syz-executor.0
33955 259898 99978 0 2 0x4000000 syz-executor.0
90590 418378 12814 0 3 0x82 nanosleep syz-executor.1
35414 94186 1 0 3 0x100083 ttyin getty
99978 481590 12814 0 3 0x82 nanosleep syz-executor.0
12427 412932 0 0 3 0x14200 acct acct
11628 432593 0 0 3 0x14200 bored sosplice
12814 444911 94400 0 3 0x82 thrsleep syz-fuzzer
12814 438371 94400 0 3 0x4000082 nanosleep syz-fuzzer
12814 310047 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 410821 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 297602 94400 0 3 0x4000082 kqread syz-fuzzer
12814 39407 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 63759 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 2071 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 134483 94400 0 3 0x4000082 thrsleep syz-fuzzer
12814 340929 94400 0 3 0x4000082 nanosleep syz-fuzzer
94400 15185 87859 0 3 0x10008a pause ksh
87859 163658 69629 0 3 0x92 select sshd
69629 272163 1 0 3 0x80 select sshd
1456 317306 58838 74 3 0x100092 bpf pflogd
58838 242427 1 0 3 0x80 netio pflogd
60365 311299 36991 73 3 0x100090 kqread syslogd
36991 243720 1 0 3 0x100082 netio syslogd
3624 272364 1 77 3 0x100090 poll dhclient
52426 481153 1 0 3 0x80 poll dhclient
47868 336127 0 0 2 0x14200 zerothread
42982 252867 0 0 3 0x14200 aiodoned aiodoned
92359 287819 0 0 3 0x14200 syncer update
58225 414573 0 0 3 0x14200 cleaner cleaner
28534 309265 0 0 3 0x14200 reaper reaper
50255 111985 0 0 3 0x14200 pgdaemon pagedaemon
48881 390934 0 0 3 0x14200 bored crynlk
26034 501485 0 0 3 0x14200 bored crypto
66307 104097 0 0 3 0x40014200 acpi0 acpi0
66177 350721 0 0 3 0x40014200 idle1
99693 235561 0 0 3 0x14200 bored softnet
85363 193907 0 0 3 0x14200 bored systqmp
11188 499573 0 0 3 0x14200 bored systq
14618 476940 0 0 3 0x40014200 bored softclock
71154 102492 0 0 3 0x40014200 idle0
37524 31457 0 0 3 0x14200 bored smr
1 305782 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 33955 (syz-executor.0) thread 0xffff800020abf160 (61827)
exclusive rwlock netlock r = 0 (0xffffffff82478e48)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sys_connect+0x6b sys/kern/uipc_syscalls.c:362
#3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8263e9d8)
#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 9637 7736K 8700K 78643K 24592 0 0
pcb 13 8K 8K 78643K 611 0 0
rtable 107 13K 14K 78643K 1952 0 0
ifaddr 86 18K 19K 78643K 524 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1583 0 0
iov 0 0K 28K 78643K 536 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1236 78K 78K 78643K 5307 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 3 5K 5K 78643K 28 0 0
VM map 19 9K 9K 78643K 25 0 0
sem 12 0K 0K 78643K 608 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 6 17K 25K 78643K 2593 0 0
sigio 0 0K 0K 78643K 631 0 0
proc 62 63K 95K 78643K 1365 0 0
subproc 32 2K 2K 78643K 306 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 1K 78643K 206 0 0
in_multi 26 1K 2K 78643K 348 0 0
ether_multi 1 0K 0K 78643K 30 0 0
mrt 0 0K 0K 78643K 17 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 90 397K 397K 78643K 90 0 0
exec 0 0K 1K 78643K 620 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 142 177K 177K 78643K 10171 0 0
UVM aobj 130 7K 7K 78643K 149 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 2K 78643K 562 0 0
NDP 20 0K 0K 78643K 163 0 0
temp 228 3565K 4200K 78643K 79399 0 0
kqueue 0 0K 0K 78643K 21 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 84 0 79 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 201 0 199 1 0 1 1 0 8 0
rtentry 112 370 0 333 2 0 2 2 0 8 0
unpcb 120 2269 0 2257 4 3 1 2 0 8 0
syncache 264 13 0 13 7 7 0 1 0 8 0
sackhl 24 2 0 2 2 2 0 1 0 8 0
tcpqe 32 156 0 156 2 2 0 1 0 8 0
tcpcb 544 1012 0 1008 6 5 1 4 0 8 0
inpcb 280 4238 0 4228 9 7 2 4 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 9 0 9 2 2 0 1 0 8 0
nd6 48 49 0 46 3 2 1 1 0 8 0
pkpcb 40 22 0 22 6 6 0 1 0 8 0
ppxss 1128 71 0 71 5 4 1 1 0 8 1
pffrag 232 58 0 58 8 8 0 1 0 482 0
pffrnode 88 58 0 58 8 8 0 1 0 8 0
pffrent 40 2238 0 2238 8 8 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 24 380 0 302 1 0 1 1 0 8 0
pfstkey 112 380 0 302 3 0 3 3 0 8 0
pfstate 328 380 0 296 8 0 8 8 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 10 0 9 7 6 1 3 0 8 0
art_heap4 256 1458 0 1268 29 13 16 16 0 8 3
art_table 32 1468 0 1277 3 0 3 3 0 8 1
art_node 16 369 0 335 1 0 1 1 0 8 0
sysvmsgpl 40 66 0 40 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 604 0 594 1 0 1 1 0 8 0
shmpl 112 147 0 19 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 5315 0 3900 46 0 46 46 0 8 0
ffsino 272 5315 0 3900 95 0 95 95 0 8 0
nchpl 144 9718 0 8104 61 0 61 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 34395 0 34395 1 0 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
vcpupl 1984 17 0 0 3 0 3 3 0 8 0
vmpool 552 23 0 6 2 0 2 2 0 8 0
scsiplug 64 5 0 5 3 3 0 1 0 8 0
scxspl 192 28780 0 28780 21 19 2 7 0 8 2
plimitpl 152 203 0 195 1 0 1 1 0 8 0
sigapl 432 2747 0 2731 3 1 2 3 0 8 0
futexpl 56 61152 0 61152 1 0 1 1 0 8 1
knotepl 112 683 0 664 2 1 1 2 0 8 0
kqueuepl 104 659 0 657 1 0 1 1 0 8 0
pipepl 112 2930 0 2911 9 8 1 2 0 8 0
fdescpl 488 2748 0 2731 3 0 3 3 0 8 0
filepl 152 25548 0 25444 17 11 6 7 0 8 1
lockfpl 104 898 0 897 1 0 1 1 0 8 0
lockfspl 48 307 0 306 1 0 1 1 0 8 0
sessionpl 112 36 0 25 1 0 1 1 0 8 0
pgrppl 48 62 0 51 1 0 1 1 0 8 0
ucredpl 96 2780 0 2771 1 0 1 1 0 8 0
zombiepl 144 2731 0 2731 1 0 1 1 0 8 1
processpl 896 2765 0 2731 4 0 4 4 0 8 0
procpl 632 8552 0 8506 5 0 5 5 0 8 1
srpgc 64 16 0 16 7 6 1 1 0 8 1
sosppl 128 66 0 66 10 9 1 1 0 8 1
sockpl 384 6798 0 6774 22 17 5 8 0 8 2
mcl64k 65536 29 0 0 3 0 3 3 0 8 0
mcl16k 16384 12 0 0 2 0 2 2 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 12 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 26 0 0 3 0 3 3 0 8 0
mcl2k2 2112 6 0 0 1 0 1 1 0 8 0
mcl2k 2048 252 0 0 31 6 25 31 0 8 0
mtagpl 80 64 0 0 1 0 1 1 0 8 0
mbufpl 256 821 0 0 42 0 42 42 0 8 0
bufpl 256 13818 0 6770 441 0 441 441 0 8 0
anonpl 16 328415 0 312568 129 45 84 95 0 124 3
amapchunkpl 152 20500 0 20363 45 38 7 13 0 158 0
amappl16 192 13499 0 12390 100 43 57 67 0 8 0
amappl15 184 447 0 447 3 3 0 1 0 8 0
amappl14 176 930 0 924 1 0 1 1 0 8 0
amappl13 168 193 0 193 3 3 0 1 0 8 0
amappl12 160 234 0 230 2 1 1 1 0 8 0
amappl11 152 343 0 327 1 0 1 1 0 8 0
amappl10 144 298 0 289 1 0 1 1 0 8 0
amappl9 136 1241 0 1232 1 0 1 1 0 8 0
amappl8 128 787 0 747 4 2 2 2 0 8 0
amappl7 120 383 0 376 1 0 1 1 0 8 0
amappl6 112 331 0 320 1 0 1 1 0 8 0
amappl5 104 490 0 474 1 0 1 1 0 8 0
amappl4 96 2603 0 2570 1 0 1 1 0 8 0
amappl3 88 1553 0 1544 1 0 1 1 0 8 0
amappl2 80 20266 0 20179 3 1 2 3 0 8 0
amappl1 72 71952 0 71515 25 15 10 20 0 8 0
amappl 80 9106 0 9055 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 64 148 0 19 3 0 3 3 0 8 0
uaddrrnd 24 2771 0 2731 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2771 0 2731 1 0 1 1 0 8 0
vmmpekpl 168 29305 0 29256 4 1 3 3 0 8 0
vmmpepl 168 354605 0 352191 246 102 144 157 0 357 37
vmsppl 368 2747 0 2731 2 0 2 2 0 8 0
pdppl 4096 5549 0 5491 8 0 8 8 0 8 0
pvpl 32 881234 0 862575 290 89 201 218 0 265 18
pmappl 232 2770 0 2737 3 1 2 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 680 0 33 19 0 19 19 0 8 0