assert "sc->sc_dev == NUM" failed in if_tun.c (5)
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syzbot
Feb 22, 2024, 10:53:28 PMFeb 22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 609e0b1cb961 Improve db_ctf_pprint(), implement handlers f..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11890d64180000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=34c25cc41c969a989f59
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/61d2216643d9/disk-609e0b1c.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/87b8d2a87856/bsd-609e0b1c.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cf1d5799dddd/kernel-609e0b1c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+34c25c...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
end trace frame: 0xffff80002a673410, count: 0
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 "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a672e60
rbx 0xffffffff816cdda0 tunclose
rdx 0
rcx 0
rax 0xffff80002a668d68
r8 0x101010101010101
r9 0x8080808080808080
r10 0x10748880450003ce
r11 0xfd79aec3774d79ab
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff81a4b53c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff80002a672e50
ss 0
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.7) tid=260576 pid=76509 tcnt=1 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=8, usrpri=78, slppri=8, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80002a668d68
forw=0xffffffffffffffff, list=0xffff800030f42560,0xffff800030f422c8
process=0xffff8000377d10e0 user=0xffff80002a66e000, vmspace=0xfffffd806ef26c68
estcpu=28, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18051 159190 7228 0 3 0x80 nanoslp syz-executor.2
18051 514088 7228 0 3 0x4000080 lockf syz-executor.2
18051 296783 7228 0 3 0x4000080 fsleep syz-executor.2
18051 373993 7228 0 3 0x4000080 fsleep syz-executor.2
13135 140561 44178 0 2 0 syz-executor.0
13135 510327 44178 0 2 0x4000000 syz-executor.0
13135 67030 44178 0 3 0x4000080 fsleep syz-executor.0
39248 37174 70852 0 2 0 syz-executor.5
39248 121298 70852 0 3 0x4000080 lockf syz-executor.5
39248 160029 70852 0 3 0x4000080 pipewr syz-executor.5
39248 182796 70852 0 2 0x4000000 syz-executor.5
95875 131925 31207 0 2 0x2 syz-executor.4
7228 228186 31207 0 3 0x82 nanoslp syz-executor.2
31361 290965 31207 0 2 0x2 syz-executor.6
70852 34426 31207 0 3 0x82 nanoslp syz-executor.5
44178 432013 31207 0 3 0x82 nanoslp syz-executor.0
66814 140068 31207 0 3 0x82 wait syz-executor.7
481 102654 31207 0 3 0x82 nanoslp syz-executor.3
35247 275294 31207 0 2 0x2 syz-executor.1
14137 199926 0 0 3 0x14280 nfsidl nfsio
42624 403618 0 0 3 0x14280 nfsidl nfsio
4226 488109 0 0 3 0x14280 nfsidl nfsio
73423 266458 0 0 3 0x14280 nfsidl nfsio
47952 20420 0 0 3 0x14280 nfsidl nfsio
64511 168005 0 0 3 0x14280 nfsidl nfsio
23601 475540 0 0 3 0x14280 nfsidl nfsio
42518 229584 0 0 3 0x14280 nfsidl nfsio
15471 158083 0 0 3 0x14280 nfsidl nfsio
40967 320409 0 0 3 0x14280 nfsidl nfsio
88181 161732 0 0 3 0x14280 nfsidl nfsio
76617 163108 0 0 3 0x14280 nfsidl nfsio
12419 69567 0 0 3 0x14280 nfsidl nfsio
88998 311963 0 0 3 0x14280 nfsidl nfsio
54568 63736 0 0 3 0x14280 nfsidl nfsio
92844 462708 0 0 3 0x14280 nfsidl nfsio
57681 317397 0 0 3 0x14280 nfsidl nfsio
55452 63872 0 0 3 0x14280 nfsidl nfsio
94454 16578 0 0 3 0x14280 nfsidl nfsio
25540 231507 0 0 3 0x14280 nfsidl nfsio
70002 139857 0 0 3 0x14200 bored sosplice
31207 146882 15125 0 3 0x2000082 wait syz-fuzzer
31207 33575 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 484386 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 262031 15125 0 3 0x6000082 wait syz-fuzzer
31207 488583 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 102947 15125 0 3 0x6000082 kqread syz-fuzzer
31207 9713 15125 0 3 0x6000082 wait syz-fuzzer
31207 438090 15125 0 3 0x6000082 wait syz-fuzzer
31207 87733 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 291467 15125 0 3 0x6000082 wait syz-fuzzer
31207 495855 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 452613 15125 0 3 0x6000082 wait syz-fuzzer
31207 360353 15125 0 3 0x6000082 wait syz-fuzzer
31207 295091 15125 0 3 0x6000082 wait syz-fuzzer
15125 74724 12016 0 3 0x10008a sigsusp ksh
12016 346362 82468 0 3 0x9a kqread sshd
88487 305471 1 0 3 0x100083 ttyin getty
82468 373178 1 0 3 0x88 kqread sshd
16823 151874 22370 73 3 0x1100090 kqread syslogd
22370 491482 1 0 3 0x100082 netio syslogd
13670 517794 1 0 3 0x100080 kqread resolvd
32207 145395 0 0 3 0x14200 bored smr
42046 344793 0 0 2 0x14200 zerothread
22251 490548 0 0 3 0x14200 aiodoned aiodoned
73974 450779 0 0 3 0x14200 syncer update
55059 99081 0 0 3 0x14200 cleaner cleaner
77952 484395 0 0 3 0x14200 reaper reaper
86036 315155 0 0 3 0x14200 pgdaemon pagedaemon
29934 124206 0 0 3 0x14200 bored viomb
18092 74602 0 0 3 0x40014200 acpi0 acpi0
69811 30651 0 0 3 0x14200 bored softnet3
74527 320128 0 0 3 0x14200 bored softnet2
1033 238047 0 0 3 0x14200 bored softnet1
99053 289112 0 0 3 0x14200 bored softnet0
71457 301974 0 0 3 0x14200 bored systqmp
49946 459921 0 0 3 0x14200 bored systq
92787 301643 0 0 2 0x40014200 softclock
29985 404031 0 0 3 0x40014200 idle0
1 499578 0 0 3 0x80082 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 10166 6407K 7185K 166960K 13018 0
pcb 15 20K 22K 166960K 643 0
rtable 182 13K 15K 166960K 1172 0
pf 30 9K 9K 166960K 199 0
ifaddr 35 10K 11K 166960K 171 0
ifgroup 51 2K 2K 166960K 324 0
sysctl 3 1K 1K 166960K 9 0
counters 30 17K 17K 166960K 102 0
ioctlops 0 0K 2K 166960K 291 0
iov 0 0K 48K 166960K 622 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1347 84K 84K 166960K 2646 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 52 0
VM map 2 1K 1K 166960K 2 0
sem 10 1K 1K 166960K 18 0
dirhash 12 2K 3K 166960K 39 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 14 49K 69K 166960K 5013 0
sigio 0 0K 0K 166960K 168 0
proc 52 42K 75K 166960K 1097 0
subproc 104 6K 6K 166960K 310 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 507 0
in_multi 72 5K 7K 166960K 289 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 1275 0
pfkey data 0 0K 0K 166960K 70 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 366 234K 244K 166960K 48254 0
UVM aobj 131 4K 4K 166960K 142 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 254 0
NDP 11 0K 2K 166960K 130 0
temp 74 6764K 6892K 166960K 44517 0
kqueue 7 12K 24K 166960K 364 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 378 0 376 3 2 1 3 0 8 0
rtentry 112 332 0 251 4 1 3 4 0 8 0
unpcb 144 4061 0 4055 11 5 6 6 0 8 5
syncache 320 53 0 53 2 1 1 1 0 8 1
tcpqe 32 298 0 298 1 1 0 1 0 8 0
tcpcb 808 2154 0 2141 22 11 11 16 0 8 8
arp 88 64 0 52 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 4 0 4 1 1 0 1 0 8 0
inpcb 344 5254 0 5239 25 13 12 17 0 8 8
nd6 104 77 0 60 1 0 1 1 0 8 0
pkpcb 40 119 0 119 2 1 1 1 0 8 1
kcovpl 48 23 0 15 1 0 1 1 0 8 0
ppxss 1072 20 0 20 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1259 0 877 32 5 27 29 0 8 0
art_table 32 1260 0 877 4 0 4 4 0 8 0
art_node 16 331 0 258 1 0 1 1 0 8 0
sysvmsgpl 40 76 0 75 1 0 1 1 0 8 0
semupl 112 6 0 6 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 139 0 11 4 0 4 4 0 8 0
dirhash 1024 35 0 18 3 0 3 3 0 8 0
dino2pl 256 8020 0 6559 92 0 92 92 0 8 0
ffsino 240 8020 0 6559 87 0 87 87 0 8 0
nchpl 144 14892 0 14397 63 41 22 63 0 8 1
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 53109 0 53107 4 3 1 3 0 8 0
vcpupl 2048 34 0 0 5 0 5 5 0 8 0
vmpool 664 42 0 8 3 0 3 3 0 8 0
kstatmem 264 166 0 144 2 0 2 2 0 8 0
scxspl 216 44255 0 44255 9 7 2 8 1 8 2
plimitpl 152 529 0 515 1 0 1 1 0 8 0
sigapl 424 5502 0 5442 8 0 8 8 0 8 0
futexpl 64 48009 0 48006 1 0 1 1 0 8 0
knotepl 120 47229 0 47163 11 7 4 10 0 8 1
kqueuepl 184 1198 0 1190 5 3 2 4 0 8 1
pipepl 288 994 0 963 11 4 7 7 0 8 4
fdescpl 432 5263 0 5241 4 0 4 4 0 8 0
filepl 120 35026 0 34790 23 7 16 16 0 8 6
lockfpl 104 1472 0 1468 3 1 2 2 0 8 1
lockfspl 48 485 0 483 1 0 1 1 0 8 0
sessionpl 144 38 0 23 1 0 1 1 0 8 0
pgrppl 48 171 0 156 1 0 1 1 0 8 0
ucredpl 104 4195 0 4184 1 0 1 1 0 8 0
zombiepl 144 5444 0 5442 1 0 1 1 0 8 0
processpl 1072 5502 0 5442 5 0 5 5 0 8 0
procpl 680 13055 0 12974 10 1 9 9 0 8 1
sosppl 168 36 0 36 1 0 1 1 0 8 1
sockpl 488 9816 0 9793 169 156 13 30 0 8 7
mcl64k 65536 239 0 239 2 1 1 1 0 8 1
mcl16k 16384 135 0 135 2 1 1 1 0 8 1
mcl12k 12288 250 0 250 2 1 1 1 0 8 1
mcl9k 9216 59 0 59 2 1 1 1 0 8 1
mcl8k 8192 405 0 405 2 1 1 1 0 8 1
mcl4k 4096 585 0 585 3 2 1 2 0 8 1
mcl2k2 2112 32 0 32 1 0 1 1 0 8 1
mcl2k 2048 81272 0 81220 29 21 8 27 0 8 1
mtagpl 96 69 0 69 3 2 1 2 0 8 1
mbufpl 256 180399 0 180261 166 142 24 73 0 8 8
bufpl 280 12558 0 6166 457 0 457 457 0 8 0
anonpl 24 568433 0 556130 96 7 89 96 0 188 0
amapchunkpl 152 152960 0 152153 50 14 36 50 0 158 1
amappl16 200 10841 0 10429 24 0 24 24 0 8 0
amappl15 192 10 0 10 1 1 0 1 0 8 0
amappl14 184 207 0 196 2 1 1 2 0 8 0
amappl13 176 15 0 15 1 1 0 1 0 8 0
amappl12 168 6115 0 6090 2 0 2 2 0 8 0
amappl11 160 54 0 49 1 0 1 1 0 8 0
amappl10 152 45 0 37 1 0 1 1 0 8 0
amappl9 144 216 0 215 1 0 1 1 0 8 0
amappl8 136 297 0 222 3 0 3 3 0 8 0
amappl7 128 218 0 195 2 0 2 2 0 8 0
amappl6 120 534 0 518 1 0 1 1 0 8 0
amappl5 112 225 0 219 1 0 1 1 0 8 0
amappl4 104 592 0 569 2 1 1 2 0 8 0
amappl3 96 30533 0 30454 3 0 3 3 0 8 0
amappl2 88 5918 0 5861 3 1 2 3 0 8 0
amappl1 80 27852 0 27444 21 10 11 21 0 8 0
amappl 88 47504 0 47284 7 1 6 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 72 141 0 11 3 0 3 3 0 8 0
uaddrrnd 24 5305 0 5249 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5305 0 5249 1 0 1 1 0 8 0
vmmpekpl 168 41985 0 41919 4 0 4 4 0 8 0
vmmpepl 168 325869 0 323931 140 26 114 129 0 357 10
vmsppl 352 5304 0 5249 6 0 6 6 0 8 0
rwobjpl 24 84928 0 77560 46 0 46 46 0 8 0
pdppl 4096 10616 0 10532 357 265 92 95 0 8 8
pvpl 32 1519365 0 1502085 300 139 161 300 0 265 0
pmappl 216 5304 0 5249 4 0 4 4 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 831 0 459 12 0 12 12 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(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
---
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 609e0b1cb961 Improve db_ctf_pprint(), implement handlers f..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11890d64180000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=34c25cc41c969a989f59
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/61d2216643d9/disk-609e0b1c.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/87b8d2a87856/bsd-609e0b1c.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cf1d5799dddd/kernel-609e0b1c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+34c25c...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
end trace frame: 0xffff80002a673410, count: 0
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 "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a672e60
rbx 0xffffffff816cdda0 tunclose
rdx 0
rcx 0
rax 0xffff80002a668d68
r8 0x101010101010101
r9 0x8080808080808080
r10 0x10748880450003ce
r11 0xfd79aec3774d79ab
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff81a4b53c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff80002a672e50
ss 0
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.7) tid=260576 pid=76509 tcnt=1 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=8, usrpri=78, slppri=8, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80002a668d68
forw=0xffffffffffffffff, list=0xffff800030f42560,0xffff800030f422c8
process=0xffff8000377d10e0 user=0xffff80002a66e000, vmspace=0xfffffd806ef26c68
estcpu=28, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18051 159190 7228 0 3 0x80 nanoslp syz-executor.2
18051 514088 7228 0 3 0x4000080 lockf syz-executor.2
18051 296783 7228 0 3 0x4000080 fsleep syz-executor.2
18051 373993 7228 0 3 0x4000080 fsleep syz-executor.2
13135 140561 44178 0 2 0 syz-executor.0
13135 510327 44178 0 2 0x4000000 syz-executor.0
13135 67030 44178 0 3 0x4000080 fsleep syz-executor.0
39248 37174 70852 0 2 0 syz-executor.5
39248 121298 70852 0 3 0x4000080 lockf syz-executor.5
39248 160029 70852 0 3 0x4000080 pipewr syz-executor.5
39248 182796 70852 0 2 0x4000000 syz-executor.5
95875 131925 31207 0 2 0x2 syz-executor.4
7228 228186 31207 0 3 0x82 nanoslp syz-executor.2
31361 290965 31207 0 2 0x2 syz-executor.6
70852 34426 31207 0 3 0x82 nanoslp syz-executor.5
44178 432013 31207 0 3 0x82 nanoslp syz-executor.0
66814 140068 31207 0 3 0x82 wait syz-executor.7
481 102654 31207 0 3 0x82 nanoslp syz-executor.3
35247 275294 31207 0 2 0x2 syz-executor.1
14137 199926 0 0 3 0x14280 nfsidl nfsio
42624 403618 0 0 3 0x14280 nfsidl nfsio
4226 488109 0 0 3 0x14280 nfsidl nfsio
73423 266458 0 0 3 0x14280 nfsidl nfsio
47952 20420 0 0 3 0x14280 nfsidl nfsio
64511 168005 0 0 3 0x14280 nfsidl nfsio
23601 475540 0 0 3 0x14280 nfsidl nfsio
42518 229584 0 0 3 0x14280 nfsidl nfsio
15471 158083 0 0 3 0x14280 nfsidl nfsio
40967 320409 0 0 3 0x14280 nfsidl nfsio
88181 161732 0 0 3 0x14280 nfsidl nfsio
76617 163108 0 0 3 0x14280 nfsidl nfsio
12419 69567 0 0 3 0x14280 nfsidl nfsio
88998 311963 0 0 3 0x14280 nfsidl nfsio
54568 63736 0 0 3 0x14280 nfsidl nfsio
92844 462708 0 0 3 0x14280 nfsidl nfsio
57681 317397 0 0 3 0x14280 nfsidl nfsio
55452 63872 0 0 3 0x14280 nfsidl nfsio
94454 16578 0 0 3 0x14280 nfsidl nfsio
25540 231507 0 0 3 0x14280 nfsidl nfsio
70002 139857 0 0 3 0x14200 bored sosplice
31207 146882 15125 0 3 0x2000082 wait syz-fuzzer
31207 33575 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 484386 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 262031 15125 0 3 0x6000082 wait syz-fuzzer
31207 488583 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 102947 15125 0 3 0x6000082 kqread syz-fuzzer
31207 9713 15125 0 3 0x6000082 wait syz-fuzzer
31207 438090 15125 0 3 0x6000082 wait syz-fuzzer
31207 87733 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 291467 15125 0 3 0x6000082 wait syz-fuzzer
31207 495855 15125 0 3 0x6000082 thrsleep syz-fuzzer
31207 452613 15125 0 3 0x6000082 wait syz-fuzzer
31207 360353 15125 0 3 0x6000082 wait syz-fuzzer
31207 295091 15125 0 3 0x6000082 wait syz-fuzzer
15125 74724 12016 0 3 0x10008a sigsusp ksh
12016 346362 82468 0 3 0x9a kqread sshd
88487 305471 1 0 3 0x100083 ttyin getty
82468 373178 1 0 3 0x88 kqread sshd
16823 151874 22370 73 3 0x1100090 kqread syslogd
22370 491482 1 0 3 0x100082 netio syslogd
13670 517794 1 0 3 0x100080 kqread resolvd
32207 145395 0 0 3 0x14200 bored smr
42046 344793 0 0 2 0x14200 zerothread
22251 490548 0 0 3 0x14200 aiodoned aiodoned
73974 450779 0 0 3 0x14200 syncer update
55059 99081 0 0 3 0x14200 cleaner cleaner
77952 484395 0 0 3 0x14200 reaper reaper
86036 315155 0 0 3 0x14200 pgdaemon pagedaemon
29934 124206 0 0 3 0x14200 bored viomb
18092 74602 0 0 3 0x40014200 acpi0 acpi0
69811 30651 0 0 3 0x14200 bored softnet3
74527 320128 0 0 3 0x14200 bored softnet2
1033 238047 0 0 3 0x14200 bored softnet1
99053 289112 0 0 3 0x14200 bored softnet0
71457 301974 0 0 3 0x14200 bored systqmp
49946 459921 0 0 3 0x14200 bored systq
92787 301643 0 0 2 0x40014200 softclock
29985 404031 0 0 3 0x40014200 idle0
1 499578 0 0 3 0x80082 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 10166 6407K 7185K 166960K 13018 0
pcb 15 20K 22K 166960K 643 0
rtable 182 13K 15K 166960K 1172 0
pf 30 9K 9K 166960K 199 0
ifaddr 35 10K 11K 166960K 171 0
ifgroup 51 2K 2K 166960K 324 0
sysctl 3 1K 1K 166960K 9 0
counters 30 17K 17K 166960K 102 0
ioctlops 0 0K 2K 166960K 291 0
iov 0 0K 48K 166960K 622 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1347 84K 84K 166960K 2646 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 52 0
VM map 2 1K 1K 166960K 2 0
sem 10 1K 1K 166960K 18 0
dirhash 12 2K 3K 166960K 39 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 14 49K 69K 166960K 5013 0
sigio 0 0K 0K 166960K 168 0
proc 52 42K 75K 166960K 1097 0
subproc 104 6K 6K 166960K 310 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 507 0
in_multi 72 5K 7K 166960K 289 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 1275 0
pfkey data 0 0K 0K 166960K 70 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 366 234K 244K 166960K 48254 0
UVM aobj 131 4K 4K 166960K 142 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 254 0
NDP 11 0K 2K 166960K 130 0
temp 74 6764K 6892K 166960K 44517 0
kqueue 7 12K 24K 166960K 364 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 378 0 376 3 2 1 3 0 8 0
rtentry 112 332 0 251 4 1 3 4 0 8 0
unpcb 144 4061 0 4055 11 5 6 6 0 8 5
syncache 320 53 0 53 2 1 1 1 0 8 1
tcpqe 32 298 0 298 1 1 0 1 0 8 0
tcpcb 808 2154 0 2141 22 11 11 16 0 8 8
arp 88 64 0 52 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 4 0 4 1 1 0 1 0 8 0
inpcb 344 5254 0 5239 25 13 12 17 0 8 8
nd6 104 77 0 60 1 0 1 1 0 8 0
pkpcb 40 119 0 119 2 1 1 1 0 8 1
kcovpl 48 23 0 15 1 0 1 1 0 8 0
ppxss 1072 20 0 20 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1259 0 877 32 5 27 29 0 8 0
art_table 32 1260 0 877 4 0 4 4 0 8 0
art_node 16 331 0 258 1 0 1 1 0 8 0
sysvmsgpl 40 76 0 75 1 0 1 1 0 8 0
semupl 112 6 0 6 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 139 0 11 4 0 4 4 0 8 0
dirhash 1024 35 0 18 3 0 3 3 0 8 0
dino2pl 256 8020 0 6559 92 0 92 92 0 8 0
ffsino 240 8020 0 6559 87 0 87 87 0 8 0
nchpl 144 14892 0 14397 63 41 22 63 0 8 1
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 53109 0 53107 4 3 1 3 0 8 0
vcpupl 2048 34 0 0 5 0 5 5 0 8 0
vmpool 664 42 0 8 3 0 3 3 0 8 0
kstatmem 264 166 0 144 2 0 2 2 0 8 0
scxspl 216 44255 0 44255 9 7 2 8 1 8 2
plimitpl 152 529 0 515 1 0 1 1 0 8 0
sigapl 424 5502 0 5442 8 0 8 8 0 8 0
futexpl 64 48009 0 48006 1 0 1 1 0 8 0
knotepl 120 47229 0 47163 11 7 4 10 0 8 1
kqueuepl 184 1198 0 1190 5 3 2 4 0 8 1
pipepl 288 994 0 963 11 4 7 7 0 8 4
fdescpl 432 5263 0 5241 4 0 4 4 0 8 0
filepl 120 35026 0 34790 23 7 16 16 0 8 6
lockfpl 104 1472 0 1468 3 1 2 2 0 8 1
lockfspl 48 485 0 483 1 0 1 1 0 8 0
sessionpl 144 38 0 23 1 0 1 1 0 8 0
pgrppl 48 171 0 156 1 0 1 1 0 8 0
ucredpl 104 4195 0 4184 1 0 1 1 0 8 0
zombiepl 144 5444 0 5442 1 0 1 1 0 8 0
processpl 1072 5502 0 5442 5 0 5 5 0 8 0
procpl 680 13055 0 12974 10 1 9 9 0 8 1
sosppl 168 36 0 36 1 0 1 1 0 8 1
sockpl 488 9816 0 9793 169 156 13 30 0 8 7
mcl64k 65536 239 0 239 2 1 1 1 0 8 1
mcl16k 16384 135 0 135 2 1 1 1 0 8 1
mcl12k 12288 250 0 250 2 1 1 1 0 8 1
mcl9k 9216 59 0 59 2 1 1 1 0 8 1
mcl8k 8192 405 0 405 2 1 1 1 0 8 1
mcl4k 4096 585 0 585 3 2 1 2 0 8 1
mcl2k2 2112 32 0 32 1 0 1 1 0 8 1
mcl2k 2048 81272 0 81220 29 21 8 27 0 8 1
mtagpl 96 69 0 69 3 2 1 2 0 8 1
mbufpl 256 180399 0 180261 166 142 24 73 0 8 8
bufpl 280 12558 0 6166 457 0 457 457 0 8 0
anonpl 24 568433 0 556130 96 7 89 96 0 188 0
amapchunkpl 152 152960 0 152153 50 14 36 50 0 158 1
amappl16 200 10841 0 10429 24 0 24 24 0 8 0
amappl15 192 10 0 10 1 1 0 1 0 8 0
amappl14 184 207 0 196 2 1 1 2 0 8 0
amappl13 176 15 0 15 1 1 0 1 0 8 0
amappl12 168 6115 0 6090 2 0 2 2 0 8 0
amappl11 160 54 0 49 1 0 1 1 0 8 0
amappl10 152 45 0 37 1 0 1 1 0 8 0
amappl9 144 216 0 215 1 0 1 1 0 8 0
amappl8 136 297 0 222 3 0 3 3 0 8 0
amappl7 128 218 0 195 2 0 2 2 0 8 0
amappl6 120 534 0 518 1 0 1 1 0 8 0
amappl5 112 225 0 219 1 0 1 1 0 8 0
amappl4 104 592 0 569 2 1 1 2 0 8 0
amappl3 96 30533 0 30454 3 0 3 3 0 8 0
amappl2 88 5918 0 5861 3 1 2 3 0 8 0
amappl1 80 27852 0 27444 21 10 11 21 0 8 0
amappl 88 47504 0 47284 7 1 6 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 72 141 0 11 3 0 3 3 0 8 0
uaddrrnd 24 5305 0 5249 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5305 0 5249 1 0 1 1 0 8 0
vmmpekpl 168 41985 0 41919 4 0 4 4 0 8 0
vmmpepl 168 325869 0 323931 140 26 114 129 0 357 10
vmsppl 352 5304 0 5249 6 0 6 6 0 8 0
rwobjpl 24 84928 0 77560 46 0 46 46 0 8 0
pdppl 4096 10616 0 10532 357 265 92 95 0 8 8
pvpl 32 1519365 0 1502085 300 139 161 300 0 265 0
pmappl 216 5304 0 5249 4 0 4 4 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 831 0 459 12 0 12 12 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(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828870a3) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff82909685,ffffffff8293e2f4,13b,ffffffff8291c640) at __assert+0x29 sys/kern/subr_prf.c:157
tun_clone_destroy(ffff800000dcb000) at tun_clone_destroy+0x234 sys/net/if_tun.c:315
if_clone_destroy(ffff80002a672fd0) at if_clone_destroy+0x132 sys/net/if.c:1384
tun_dev_close(2802,1) at tun_dev_close+0x141 sys/net/if_tun.c:521
spec_close(ffff80002a6730b0) at spec_close+0x2c7 sys/kern/spec_vnops.c:538
VOP_CLOSE(fffffd8060ce02d0,1,fffffd807f7d76e8,ffff80002a668d68) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806d111178,ffff80002a668d68) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609
fdrop(fffffd806d111178,ffff80002a668d68) at fdrop+0xcb sys/kern/kern_descrip.c:1274
closef(fffffd806d111178,ffff80002a668d68) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a668d68) at fdfree+0xf3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a668d68,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199
sys_exit(ffff80002a668d68,ffff80002a673420,ffff80002a673370) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002a673420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7aac8bf607c0, count: -16
---
This report is generated by a bot. It may contain errors.
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
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