login: panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 303
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*224905 1909 0 0 0x4000000 0K syz-executor.3
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259e6a9) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611ec2,ffffffff8265a184,12f,ffffffff826247dc) at __assert+0x25 sys/kern/subr_prf.c:161
tun_clone_destroy(ffff800000d5c800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303
if_clone_destroy(ffff80002e53d2f0) at if_clone_destroy+0x132 sys/net/if.c:1230
soo_ioctl(fffffd806973dad0,80206979,ffff80002e53d2f0,ffff800029623260) at soo_ioctl+0x26c
sys_ioctl(ffff800029623260,ffff80002e53d408,ffff80002e53d450) at sys_ioctl+0x4a2
syscall(ffff80002e53d4d0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e53d4d0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x62abdba6ed0, count: 6
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 "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 303
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8259e6a9) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611ec2,ffffffff8265a184,12f,ffffffff826247dc) at __assert+0x25 sys/kern/subr_prf.c:161
tun_clone_destroy(ffff800000d5c800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303
if_clone_destroy(ffff80002e53d2f0) at if_clone_destroy+0x132 sys/net/if.c:1230
soo_ioctl(fffffd806973dad0,80206979,ffff80002e53d2f0,ffff800029623260) at soo_ioctl+0x26c
sys_ioctl(ffff800029623260,ffff80002e53d408,ffff80002e53d450) at sys_ioctl+0x4a2
syscall(ffff80002e53d4d0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e53d4d0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x62abdba6ed0, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e53d100
rbx 0xffffffff82920bb7 cpu_info_full_primary+0x2bb7
rdx 0
rcx 0
rax 0xffff800029623260
r8 0
r9 0x8080808080808080
r10 0x9cd2ef3c5fe9631f
r11 0x84a3adaab0f1bd4
r12 0xffffffff829209b8 cpu_info_full_primary+0x29b8
r13 0
r14 0
r15 0x1
rip 0xffffffff823865d8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e53d0f0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.3) pid=224905 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=85, nice=20
forw=0xffffffffffffffff, list=0xffff8000296237a0,0xffff800029622010
process=0xffff80002e4c14f0 user=0xffff80002e538000, vmspace=0xfffffd8066387a28
estcpu=35, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
79542 278211 76771 0 2 0 syz-executor.6
1909 430118 42476 0 2 0 syz-executor.3
* 1909 224905 42476 0 7 0x4000000 syz-executor.3
1909 345346 42476 0 3 0x4000080 fsleep syz-executor.3
87321 301213 89966 0 2 0 syz-executor.2
87321 219757 89966 0 3 0x4000080 fsleep syz-executor.2
67333 512574 45419 0 2 0 syz-executor.0
67333 471111 45419 0 3 0x4000080 fsleep syz-executor.0
67333 502560 45419 0 3 0x4000080 fsleep syz-executor.0
53484 32024 95391 0 2 0 syz-executor.5
53484 117556 95391 0 3 0x4000080 fsleep syz-executor.5
276 397499 47384 0 2 0x480 syz-executor.4
276 364457 47384 0 3 0x4000080 fsleep syz-executor.4
63684 486011 39230 0 2 0 syz-executor.1
63684 233664 39230 0 3 0x4000080 kqread syz-executor.1
63684 152567 39230 0 3 0x4000080 fsleep syz-executor.1
76771 379114 32944 0 3 0x82 nanoslp syz-executor.6
47384 484168 32944 0 3 0x82 nanoslp syz-executor.4
56236 57087 32944 0 2 0x2 syz-executor.7
64216 254176 1 0 3 0x100083 ttyin getty
39230 78555 32944 0 3 0x82 nanoslp syz-executor.1
26843 404897 0 0 3 0x14200 acct acct
45419 217865 32944 0 3 0x82 nanoslp syz-executor.0
89966 451771 32944 0 3 0x82 nanoslp syz-executor.2
42476 164101 32944 0 2 0x482 syz-executor.3
95391 227832 32944 0 3 0x82 nanoslp syz-executor.5
17460 138761 0 0 3 0x14280 nfsidl nfsio
27273 447515 0 0 3 0x14280 nfsidl nfsio
64639 462572 0 0 3 0x14280 nfsidl nfsio
38111 416898 0 0 3 0x14280 nfsidl nfsio
93395 38128 0 0 3 0x14280 nfsidl nfsio
56403 196445 0 0 3 0x14280 nfsidl nfsio
85910 269756 0 0 3 0x14280 nfsidl nfsio
92543 166478 0 0 3 0x14280 nfsidl nfsio
30179 229735 0 0 3 0x14280 nfsidl nfsio
26124 326503 0 0 3 0x14280 nfsidl nfsio
35727 16239 0 0 3 0x14280 nfsidl nfsio
57769 453992 0 0 3 0x14280 nfsidl nfsio
5160 276286 0 0 3 0x14280 nfsidl nfsio
58646 371131 0 0 3 0x14280 nfsidl nfsio
32593 110343 0 0 3 0x14280 nfsidl nfsio
44681 522111 0 0 3 0x14280 nfsidl nfsio
61362 307130 0 0 3 0x14280 nfsidl nfsio
53173 126561 0 0 3 0x14280 nfsidl nfsio
47105 384086 0 0 3 0x14280 nfsidl nfsio
74098 34388 0 0 3 0x14280 nfsidl nfsio
72273 252820 0 0 3 0x14200 bored sosplice
32944 292155 18384 0 3 0x82 thrsleep syz-fuzzer
32944 251965 18384 0 3 0x4000082 nanoslp syz-fuzzer
32944 325979 18384 0 3 0x4000082 thrsleep syz-fuzzer
32944 252293 18384 0 3 0x4000082 thrsleep syz-fuzzer
32944 508824 18384 0 3 0x4000082 thrsleep syz-fuzzer
32944 208746 18384 0 3 0x4000082 thrsleep syz-fuzzer
32944 272350 18384 0 3 0x4000082 kqread syz-fuzzer
32944 505234 18384 0 3 0x4000082 thrsleep syz-fuzzer
32944 461600 18384 0 2 0x4000482 syz-fuzzer
18384 486178 42675 0 3 0x10008a sigsusp ksh
42675 338914 9466 0 3 0x9a kqread sshd
9466 498057 1 0 3 0x88 kqread sshd
31716 372326 35617 74 3 0x1100092 bpf pflogd
35617 90667 1 0 3 0x80 netio pflogd
5683 367502 74044 73 3 0x1100090 kqread syslogd
74044 300682 1 0 3 0x100082 netio syslogd
66306 178580 1 0 3 0x100080 kqread resolvd
88883 511091 35093 77 2 0x100092 dhcpleased
6271 205349 35093 77 3 0x100092 kqread dhcpleased
35093 119349 1 0 3 0x80 kqread dhcpleased
9355 112641 0 0 3 0x14200 bored smr
42425 355447 0 0 2 0x14200 zerothread
14181 143076 0 0 3 0x14200 aiodoned aiodoned
20991 140473 0 0 3 0x14200 syncer update
19736 283904 0 0 3 0x14200 cleaner cleaner
60251 72054 0 0 3 0x14200 reaper reaper
68123 404996 0 0 3 0x14200 pgdaemon pagedaemon
70613 289135 0 0 3 0x14200 bored viomb
21987 489350 0 0 3 0x40014200 acpi0 acpi0
11359 259437 0 0 7 0x40014200 idle1
80484 87497 0 0 3 0x14200 bored softnet
28685 35200 0 0 3 0x14200 bored softnet
93114 409152 0 0 3 0x14200 bored softnet
41687 450328 0 0 3 0x14200 bored softnet
13153 136834 0 0 3 0x14200 bored systqmp
8277 138390 0 0 3 0x14200 bored systq
24110 166480 0 0 3 0x40014200 bored softclock
53247 33434 0 0 3 0x40014200 idle0
1 34813 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10209 6510K 7445K 78643K 65828 0
pcb 13 20K 22K 78643K 5148 0
rtable 65 10K 16K 78643K 25673 0
ifaddr 49 19K 28K 78643K 2186 0
sysctl 3 1K 1K 78643K 3 0
counters 42 33K 36K 78643K 776 0
ioctlops 0 0K 4K 78643K 7434 0
iov 0 0K 24K 78643K 2717 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1516 95K 96K 78643K 15306 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 291 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 6726 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 17 61K 93K 78643K 30470 0
sigio 0 0K 0K 78643K 478 0
proc 74 91K 116K 78643K 4334 0
subproc 104 6K 6K 78643K 1378 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 3300 0
in_multi 1 0K 7K 78643K 1885 0
ether_multi 1 0K 0K 78643K 311 0
mrt 12 0K 0K 78643K 371 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 253 1129K 1129K 78643K 253 0
exec 0 0K 2K 78643K 7665 0
pfkey data 0 0K 0K 78643K 15 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 747 2109K 2113K 78643K 164594 0
UVM aobj 131 5K 6K 78643K 166 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 833 0
NDP 7 0K 1K 78643K 624 0
temp 148 4797K 5834K 78643K 344808 0
kqueue 13 20K 24K 78643K 1738 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 27412 0 27404 121 118 3 7 0 8 2
rtentry 112 1794 0 1787 4 3 1 4 0 8 0
unpcb 144 13643 0 13627 156 152 4 8 0 8 3
syncache 296 128 0 128 16 16 0 1 0 8 0
tcpqe 32 81 0 81 10 10 0 1 0 8 0
tcpcb 736 21214 0 21171 347 334 13 29 0 8 9
arp 120 301 0 299 1 0 1 1 0 8 0
inpcb 320 50724 0 50683 374 366 8 20 0 8 4
nd6 48 374 0 374 2 1 1 1 0 8 1
pkpcb 40 162 0 162 12 12 0 1 0 8 0
kcovpl 48 106 0 98 1 0 1 1 0 8 0
ppxss 1256 166 0 166 20 20 0 1 0 8 0
pfstscr 40 7 0 7 3 3 0 1 0 8 0
pffrag 232 56 0 56 8 8 0 1 0 482 0
pffrnode 88 56 0 56 8 8 0 1 0 8 0
pffrent 40 306 0 306 12 12 0 1 0 8 0
pfosfp 40 1470 0 1043 5 0 5 5 0 8 0
pfosfpen 112 1470 0 752 21 0 21 21 0 8 0
pfrktable 1344 346 0 334 4 3 1 2 0 8 0
pftag 88 4 0 3 1 0 1 1 0 8 0
pfstitem 24 47 0 45 1 0 1 1 0 8 0
pfstkey 120 61 0 59 1 0 1 1 0 8 0
pfstate 336 54 0 52 3 2 1 3 0 8 0
pfrule 1360 305 0 271 5 2 3 3 0 8 0
rttmr 136 52 0 52 13 13 0 1 0 8 0
art_heap8 4096 4 0 3 3 2 1 3 0 8 0
art_heap4 256 7381 0 7374 71 66 5 29 0 8 4
art_table 32 7385 0 7377 5 4 1 4 0 8 0
art_node 16 1781 0 1778 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 6724 0 6714 1 0 1 1 0 8 0
shmpl 112 163 0 35 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 36843 0 35332 96 0 96 96 0 8 0
ffsino 272 36843 0 35332 102 0 102 102 0 8 0
nchpl 144 73621 0 71976 63 0 63 63 0 8 0
uvmvnodes 80 6415 0 0 131 0 131 131 0 8 0
vnodes 224 6415 0 0 378 0 378 378 0 8 0
namei 1024 254292 0 254292 6 5 1 2 0 8 1
percpumem 16 400 0 367 1 0 1 1 0 8 0
vcpupl 2048 372 0 0 47 0 47 47 0 8 0
vmpool 568 438 0 66 27 0 27 27 0 8 0
pfiaddrpl 120 111 0 89 2 1 1 1 0 8 0
kstatmem 264 748 0 734 15 13 2 3 0 8 0
scsiplug 72 40 0 40 11 11 0 1 0 8 0
scxspl 216 216423 0 216423 21 20 1 8 0 8 1
plimitpl 152 3208 0 3193 1 0 1 1 0 8 0
sigapl 424 30742 0 30673 12 4 8 8 0 8 0
futexpl 64 325225 0 325218 4 3 1 1 0 8 0
knotepl 120 1047 0 0 10 0 10 10 0 8 0
kqueuepl 224 9780 0 9706 170 165 5 11 0 8 0
pipepl 336 10432 0 10404 215 208 7 11 0 8 4
fdescpl 496 30566 0 30536 5 1 4 5 0 8 0
filepl 152 230403 0 230056 280 263 17 23 0 8 3
lockfpl 104 6051 0 6049 11 10 1 3 0 8 0
lockfspl 48 1870 0 1868 1 0 1 1 0 8 0
sessionpl 144 125 0 108 1 0 1 1 0 8 0
pgrppl 48 304 0 287 1 0 1 1 0 8 0
ucredpl 104 24199 0 24184 1 0 1 1 0 8 0
zombiepl 144 30673 0 30673 2 1 1 1 0 8 1
processpl 1064 30742 0 30673 6 1 5 5 0 8 0
procpl 672 75561 0 75475 33 25 8 9 0 8 0
srpgc 96 201 0 201 35 34 1 1 0 8 1
sosppl 168 150 0 150 29 29 0 1 0 8 0
sockpl 504 92110 0 92041 1233 1220 13 37 0 8 4
mcl64k 65536 10 0 0 2 0 2 2 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 6 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 12 0 0 2 0 2 2 0 8 0
mcl2k2 2112 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 413 0 0 22 1 21 22 0 8 0
mtagpl 96 1552 0 0 26 0 26 26 0 8 0
mbufpl 256 8039 0 0 473 0 473 473 0 8 0
bufpl 288 47081 0 40626 462 0 462 462 0 8 0
anonpl 24 5837511 0 5813433 425 266 159 166 0 186 3
amapchunkpl 152 472410 0 471240 107 60 47 48 0 158 0
amappl16 200 94965 0 94163 202 157 45 60 0 8 2
amappl15 192 4143 0 4141 1 0 1 1 0 8 0
amappl14 184 3234 0 3227 2 1 1 1 0 8 0
amappl13 176 5471 0 5467 1 0 1 1 0 8 0
amappl12 168 7294 0 7285 1 0 1 1 0 8 0
amappl11 160 5641 0 5620 2 0 2 2 0 8 0
amappl10 152 1113 0 1108 1 0 1 1 0 8 0
amappl9 144 3693 0 3689 1 0 1 1 0 8 0
amappl8 136 4895 0 4752 5 0 5 5 0 8 0
amappl7 128 2848 0 2835 1 0 1 1 0 8 0
amappl6 120 4056 0 4029 2 1 1 2 0 8 0
amappl5 112 21462 0 21445 1 0 1 1 0 8 0
amappl4 104 13342 0 13305 2 0 2 2 0 8 0
amappl3 96 93522 0 93452 2 0 2 2 0 8 0
amappl2 88 42102 0 42028 3 0 3 3 0 8 0
amappl1 80 712050 0 711359 30 15 15 20 0 8 0
amappl 88 161809 0 161472 8 0 8 8 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 72 165 0 35 3 0 3 3 0 8 0
uaddrrnd 24 31004 0 30602 3 0 3 3 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 31004 0 30602 3 0 3 3 0 8 0
vmmpekpl 168 207540 0 207436 6 0 6 6 0 8 0
vmmpepl 168 2972521 0 2968740 394 217 177 181 0 357 3
vmsppl 368 31003 0 30602 39 2 37 37 0 8 0
rwobjpl 56 708251 0 699602 148 25 123 123 0 8 0
pdppl 4096 62015 0 61576 1229 788 441 441 0 8 2
pvpl 32 11466716 0 11444453 589 387 202 258 0 265 7
pmappl 248 31003 0 30602 28 2 26 26 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 4385 0 2652 51 0 51 51 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:437
panic(ffffffff8259e6a9) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff82611ec2,ffffffff8265a184,12f,ffffffff826247dc) at __assert+0x25 sys/kern/subr_prf.c:161
tun_clone_destroy(ffff800000d5c800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303
if_clone_destroy(ffff80002e53d2f0) at if_clone_destroy+0x132 sys/net/if.c:1230
soo_ioctl(fffffd806973dad0,80206979,ffff80002e53d2f0,ffff800029623260) at soo_ioctl+0x26c
sys_ioctl(ffff800029623260,ffff80002e53d408,ffff80002e53d450) at sys_ioctl+0x4a2
syscall(ffff80002e53d4d0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e53d4d0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x62abdba6ed0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020de8ff0) 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(ffff800020de8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020de8ff0) 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(ffff800020de8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5