panic: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/netinet/if_ether.c", line 758
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*239947 90059 0 0x14000 0x40000200 0 softclock
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82781d73) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff827fbf28,ffffffff8281fcc8,2f6,ffffffff8274ca2a) at __assert+0x29 sys/kern/subr_prf.c:157
arptfree(fffffd80677034e8) at arptfree+0x131 sys/netinet/if_ether.c:758
arptimer(ffffffff82cb6900) at arptimer+0x88 sys/netinet/if_ether.c:135
timeout_run(ffffffff82cb6900) at timeout_run+0x8f sys/kern/kern_timeout.c:640
softclock_thread(ffff8000215ea298) at softclock_thread+0xd4 sys/kern/kern_timeout.c:763
end trace frame: 0x0, count: 8
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
*cpu0: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/netinet/if_ether.c", line 758
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82781d73) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff827fbf28,ffffffff8281fcc8,2f6,ffffffff8274ca2a) at __assert+0x29 sys/kern/subr_prf.c:157
arptfree(fffffd80677034e8) at arptfree+0x131 sys/netinet/if_ether.c:758
arptimer(ffffffff82cb6900) at arptimer+0x88 sys/netinet/if_ether.c:135
timeout_run(ffffffff82cb6900) at timeout_run+0x8f sys/kern/kern_timeout.c:640
softclock_thread(ffff8000215ea298) at softclock_thread+0xd4 sys/kern/kern_timeout.c:763
end trace frame: 0x0, count: -7
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff8000215f62a0
rbx 0
rdx 0
rcx 0
rax 0xffff8000215ea298
r8 0x101010101010101
r9 0x8080808080808080
r10 0xdc92980510b993da
r11 0xaa2bd63a684b4718
r12 0
r13 0xfffffd806ec79580
r14 0
r15 0x1
rip 0xffffffff81877d4c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff8000215f6290
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (softclock) tid=239947 pid=90059 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
runpri=0, usrpri=50, slppri=0, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff8000215ea540,0xffff8000215ea000
process=0xffff8000ffffe7e0 user=0xffff8000215f1000, vmspace=0xffffffff82c802b0
estcpu=0, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
16032 37591 1308 0 4 0x82000 syz-executor.1
16032 272797 1308 0 3 0x4002000 suspend syz-executor.1
16032 78747 1308 0 4 0x4082000 syz-executor.1
16032 518768 1308 0 3 0x4082000 clonelk syz-executor.1
13868 262449 41512 0 3 0x82 piperd syz-executor.6
35185 355914 41512 0 3 0x82 piperd syz-executor.4
72625 413371 0 0 3 0x14280 nfsidl nfsio
55426 452499 0 0 3 0x14280 nfsidl nfsio
49461 465986 0 0 3 0x14280 nfsidl nfsio
44546 307136 0 0 3 0x14280 nfsidl nfsio
34066 436969 0 0 3 0x14280 nfsidl nfsio
39449 40836 0 0 3 0x14280 nfsidl nfsio
59567 483327 0 0 3 0x14280 nfsidl nfsio
78618 162116 0 0 3 0x14280 nfsidl nfsio
75426 256913 0 0 3 0x14280 nfsidl nfsio
22529 55906 0 0 3 0x14280 nfsidl nfsio
33604 477043 0 0 3 0x14280 nfsidl nfsio
33317 196371 0 0 3 0x14280 nfsidl nfsio
45794 265274 0 0 3 0x14280 nfsidl nfsio
25433 85462 0 0 3 0x14280 nfsidl nfsio
15944 292926 0 0 3 0x14280 nfsidl nfsio
68011 412938 0 0 3 0x14280 nfsidl nfsio
18302 464812 0 0 3 0x14280 nfsidl nfsio
32530 521295 0 0 3 0x14280 nfsidl nfsio
26308 125869 0 0 3 0x14280 nfsidl nfsio
45292 422103 0 0 3 0x14280 nfsidl nfsio
35119 140544 41512 0 3 0x82 piperd syz-executor.5
75986 110250 1 0 3 0x100083 ttyin getty
1308 475511 41512 0 2 0x482 syz-executor.1
66625 146319 0 0 3 0x14200 bored sosplice
41512 49099 59498 0 3 0x2000082 wait syz-fuzzer
41512 75190 59498 0 2 0x6000482 syz-fuzzer
41512 508402 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 359315 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 100785 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 236221 59498 0 3 0x6000082 wait syz-fuzzer
41512 19331 59498 0 3 0x6000082 wait syz-fuzzer
41512 27728 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 496524 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 380348 59498 0 3 0x6000082 thrsleep syz-fuzzer
41512 79782 59498 0 3 0x6000082 wait syz-fuzzer
41512 107521 59498 0 3 0x6000082 wait syz-fuzzer
41512 357338 59498 0 3 0x6000082 kqread syz-fuzzer
41512 397984 59498 0 3 0x6000082 wait syz-fuzzer
41512 317040 59498 0 3 0x6000082 thrsleep syz-fuzzer
59498 61624 57404 0 3 0x10008a sigsusp ksh
57404 121155 79714 0 3 0x9a kqread sshd
79714 93592 1 0 3 0x88 kqread sshd
61680 431883 96655 73 2 0x1100010 syslogd
96655 504140 1 0 3 0x100082 netio syslogd
37047 521974 1 0 3 0x100080 kqread resolvd
13013 295997 14298 77 3 0x100092 kqread dhcpleased
65326 29424 14298 77 3 0x100092 kqread dhcpleased
14298 132906 1 0 3 0x80 kqread dhcpleased
47706 510045 0 0 3 0x14200 bored smr
90887 32537 0 0 3 0x14200 pgzero zerothread
35312 154978 0 0 3 0x14200 aiodoned aiodoned
16486 403318 0 0 3 0x14200 syncer update
50575 399987 0 0 3 0x14200 cleaner cleaner
91698 469652 0 0 3 0x14200 reaper reaper
91914 178899 0 0 3 0x14200 pgdaemon pagedaemon
88299 88898 0 0 3 0x14200 bored viomb
8133 473849 0 0 3 0x40014200 acpi0 acpi0
97017 240097 0 0 3 0x14200 bored softnet3
43792 398995 0 0 3 0x14200 bored softnet2
9734 341812 0 0 3 0x14200 bored softnet1
94475 341058 0 0 3 0x14200 bored softnet0
102 92117 0 0 3 0x14200 bored systqmp
37161 324618 0 0 3 0x14200 bored systq
*90059 239947 0 0 7 0x40014200 softclock
79673 81728 0 0 3 0x40014200 idle0
1 517750 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
devbuf 10189 6430K 8114K 78643K 49348 0
pcb 13 18K 20K 78643K 973 0
rtable 201 6K 7K 78643K 1439 0
pf 30 9K 10K 78643K 253 0
ifaddr 37 10K 13K 78643K 230 0
ifgroup 51 2K 2K 78643K 422 0
sysctl 3 0K 2K 78643K 11 0
counters 28 17K 17K 78643K 132 0
ioctlops 0 0K 2K 78643K 485 0
iov 0 0K 20K 78643K 1241 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1704 107K 107K 78643K 11923 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 149 0
VM map 2 1K 1K 78643K 2 0
sem 10 1K 1K 78643K 19 0
dirhash 6 1K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 9 29K 69K 78643K 12183 0
sigio 0 0K 0K 78643K 272 0
proc 58 59K 83K 78643K 1763 0
subproc 78 4K 10K 78643K 632 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 520 0
in_multi 77 5K 7K 78643K 442 0
ether_multi 1 0K 0K 78643K 11 0
mrt 1 0K 0K 78643K 8 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 145 652K 652K 78643K 145 0
exec 0 0K 1K 78643K 2887 0
pfkey data 0 0K 0K 78643K 43 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 8 62K 64K 78643K 10 0
UVM amap 377 82K 115K 78643K 114629 0
UVM aobj 131 7K 7K 78643K 147 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 465 0
NDP 11 0K 2K 78643K 181 0
temp 66 5911K 6040K 78643K 157157 0
kqueue 12 18K 26K 78643K 769 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 613 0 610 9 8 1 3 0 8 0
rtentry 112 414 0 322 4 0 4 4 0 8 0
unpcb 144 29420 0 29407 157 156 1 12 0 8 0
syncache 304 148 0 148 27 27 0 1 0 8 0
sackhl 24 1 0 1 1 1 0 1 0 8 0
tcpqe 32 157 190 157 17 17 0 1 0 8 0
tcpcb 808 3607 0 3575 110 103 7 16 0 8 3
arp 88 71 0 56 1 0 1 1 0 8 0
ipq 40 11 0 11 7 7 0 1 0 8 0
ipqe 40 103 0 103 7 7 0 1 0 8 0
inpcb 336 9126 0 9091 140 131 9 15 0 8 5
nd6 104 113 0 92 1 0 1 1 0 8 0
pkpcb 40 38 0 38 8 8 0 1 0 8 0
kcovpl 48 33 0 27 1 0 1 1 0 8 0
ppxss 1160 30 0 30 9 9 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1606 0 1225 38 8 30 30 0 8 1
art_table 32 1607 0 1225 4 0 4 4 0 8 0
art_node 16 402 0 318 1 0 1 1 0 8 0
semupl 112 7 0 7 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 144 0 16 4 0 4 4 0 8 0
dirhash 1024 17 0 13 3 1 2 3 0 8 0
dino2pl 256 17908 0 16380 97 0 97 97 0 8 0
ffsino 240 17908 0 16380 91 0 91 91 0 8 0
nchpl 144 35411 0 34936 63 41 22 63 0 8 0
uvmvnodes 80 6480 0 0 133 0 133 133 0 8 0
vnodes 216 6480 0 0 360 0 360 360 0 8 0
namei 1024 123758 0 123758 9 8 1 2 0 8 1
vmpool 664 149 0 149 24 23 1 1 0 8 1
kstatmem 264 230 0 208 3 1 2 3 0 8 0
scxspl 216 116515 0 116515 26 25 1 8 1 8 1
plimitpl 152 1034 0 1021 1 0 1 1 0 8 0
sigapl 424 12692 0 12633 9 1 8 8 0 8 0
futexpl 64 127516 0 127516 8 7 1 1 0 8 1
knotepl 120 133075 0 133011 52 49 3 11 0 8 0
kqueuepl 184 1739 0 1730 21 20 1 4 0 8 0
pipepl 288 2897 0 2877 65 62 3 10 0 8 0
fdescpl 432 12414 0 12394 5 1 4 4 0 8 0
filepl 120 99833 0 99643 156 147 9 20 0 8 1
lockfpl 104 11494 0 11492 19 18 1 4 0 8 0
lockfspl 48 4952 0 4950 3 2 1 2 0 8 0
sessionpl 144 51 0 37 1 0 1 1 0 8 0
pgrppl 48 417 0 403 1 0 1 1 0 8 0
ucredpl 104 10244 0 10233 1 0 1 1 0 8 0
zombiepl 144 12637 0 12633 1 0 1 1 0 8 0
processpl 1008 12692 0 12633 12 3 9 9 0 8 0
procpl 680 31170 0 31094 26 18 8 9 0 8 0
sosppl 168 190 0 190 7 7 0 1 0 8 0
sockpl 456 39203 0 39152 825 810 15 42 0 8 7
mcl64k 65536 563 0 563 20 20 0 1 0 8 0
mcl16k 16384 225 0 225 22 22 0 1 0 8 0
mcl12k 12288 496 0 496 18 18 0 1 0 8 0
mcl9k 9216 185 0 185 25 25 0 1 0 8 0
mcl8k 8192 828 0 828 20 20 0 1 0 8 0
mcl4k 4096 1636 0 1636 17 16 1 1 0 8 1
mcl2k2 2112 76 0 76 27 27 0 1 0 8 0
mcl2k 2048 91436 0 91394 64 56 8 30 0 8 1
mtagpl 96 4860 0 4577 26 16 10 20 0 8 0
mbufpl 256 345069 0 344694 1706 1657 49 212 0 8 1
bufpl 288 26370 0 19889 464 0 464 464 0 8 0
anonpl 24 1221691 0 1210699 195 81 114 114 0 188 12
amapchunkpl 152 375314 0 374599 120 76 44 50 0 158 7
amappl16 200 24758 0 24367 87 61 26 34 0 8 0
amappl15 192 15 0 15 2 2 0 1 0 8 0
amappl14 184 233 0 218 2 1 1 2 0 8 0
amappl13 176 12 0 12 1 1 0 1 0 8 0
amappl12 168 13415 0 13395 2 0 2 2 0 8 0
amappl11 160 48 0 38 1 0 1 1 0 8 0
amappl10 152 50 0 43 2 1 1 1 0 8 0
amappl9 144 231 0 229 1 0 1 1 0 8 0
amappl8 136 605 0 480 5 0 5 5 0 8 0
amappl7 128 114 0 98 2 0 2 2 0 8 0
amappl6 120 455 0 426 2 1 1 2 0 8 0
amappl5 112 486 0 477 1 0 1 1 0 8 0
amappl4 104 884 0 849 3 2 1 2 0 8 0
amappl3 96 72246 0 72189 3 0 3 3 0 8 0
amappl2 88 13008 0 12949 3 1 2 3 0 8 0
amappl1 80 54781 0 54293 23 12 11 22 0 8 0
amappl 88 113602 0 113406 7 0 7 7 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 72 146 0 16 3 0 3 3 0 8 0
uaddrrnd 24 12563 0 12543 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 12563 0 12543 1 0 1 1 0 8 0
vmmpekpl 168 91977 0 91918 3 0 3 3 0 8 0
vmmpepl 168 738395 0 736430 290 176 114 128 0 357 0
vmsppl 368 12562 0 12543 3 0 3 3 0 8 0
rwobjpl 24 178137 0 170127 54 4 50 50 0 8 0
pdppl 4096 25132 0 25086 541 485 56 66 0 8 10
pvpl 32 3410099 0 3394052 581 361 220 358 0 265 45
pmappl 216 12562 0 12543 2 0 2 2 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 3440 0 2609 31 4 27 29 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82781d73) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff827fbf28,ffffffff8281fcc8,2f6,ffffffff8274ca2a) at __assert+0x29 sys/kern/subr_prf.c:157
arptfree(fffffd80677034e8) at arptfree+0x131 sys/netinet/if_ether.c:758
arptimer(ffffffff82cb6900) at arptimer+0x88 sys/netinet/if_ether.c:135
timeout_run(ffffffff82cb6900) at timeout_run+0x8f sys/kern/kern_timeout.c:640
softclock_thread(ffff8000215ea298) at softclock_thread+0xd4 sys/kern/kern_timeout.c:763
end trace frame: 0x0, count: -7
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82781d73) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff827fbf28,ffffffff8281fcc8,2f6,ffffffff8274ca2a) at __assert+0x29 sys/kern/subr_prf.c:157
arptfree(fffffd80677034e8) at arptfree+0x131 sys/netinet/if_ether.c:758
arptimer(ffffffff82cb6900) at arptimer+0x88 sys/netinet/if_ether.c:135
timeout_run(ffffffff82cb6900) at timeout_run+0x8f sys/kern/kern_timeout.c:640
softclock_thread(ffff8000215ea298) at softclock_thread+0xd4 sys/kern/kern_timeout.c:763
end trace frame: 0x0, count: -7