¹j¼õ¬|ÿ ž¨E1\…:panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *343734 74125 0 0x2 0 1K ifconfig 34546 27740 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833706db) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833aefde,ffffffff833fd855,13c,ffffffff832f1c02) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001408800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80003c462e00) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800001457090,80206979,ffff80003c462e00,ffff80003a82d258) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a82d258,ffff80003c462fe0,ffff80003c462f30) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c462fe0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c462fe0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f010ad1ad30, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833706db) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833aefde,ffffffff833fd855,13c,ffffffff832f1c02) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001408800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80003c462e00) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800001457090,80206979,ffff80003c462e00,ffff80003a82d258) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a82d258,ffff80003c462fe0,ffff80003c462f30) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c462fe0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c462fe0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f010ad1ad30, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c462bb0 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80003a82d258 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5fab07c650ddeaa7 r11 0xf8748185b59e083 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff83237755 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c462ba0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (ifconfig) tid=343734 pid=74125 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a82da20,0xffff80003a82cfd0 process=0xffff80003a426b70 user=0xffff80003c45e000, vmspace=0xfffffd8062d7bd88 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *74125 343734 99788 0 7 0x2 ifconfig 27740 34546 92951 0 7 0 syz-executor 27740 499426 92951 0 3 0x4000080 fsleep syz-executor 99788 216434 8419 0 3 0x10008a sigsusp sh 8419 155178 31372 0 3 0x82 wait syz-executor 28749 364004 93083 0 2 0 syz-executor 28749 441048 93083 0 3 0x4000080 fsleep syz-executor 71761 421225 19552 0 3 0x80 nanoslp syz-executor 71761 415731 19552 0 3 0x4000080 sbwait syz-executor 71761 255718 19552 0 3 0x4000080 fsleep syz-executor 83855 24188 1513 60929 2 0x10 syz-executor 83855 444014 1513 60929 3 0x4000090 fsleep syz-executor 83855 243442 1513 60929 3 0x4000090 fsleep syz-executor 99620 144602 68374 0 2 0 syz-executor 99620 497034 68374 0 3 0x4000080 fsleep syz-executor 99620 83043 68374 0 3 0x4000080 fsleep syz-executor 69405 117715 79985 0 2 0 syz-executor 69405 45369 79985 0 3 0x4000080 fsleep syz-executor 69405 252228 79985 0 3 0x4000080 fsleep syz-executor 69405 172924 79985 0 3 0x4000080 fsleep syz-executor 78380 475225 97212 0 3 0x80 nanoslp syz-executor 78380 309290 97212 0 3 0x4000080 ttyout syz-executor 78380 394612 97212 0 3 0x4000080 fsleep syz-executor 92951 244855 31372 0 3 0x82 nanoslp syz-executor 93083 219345 31372 0 3 0x82 nanoslp syz-executor 35819 210999 1 0 3 0x100083 ttyin getty 79985 442062 31372 0 3 0x82 nanoslp syz-executor 19552 102527 31372 0 3 0x82 nanoslp syz-executor 97212 70163 31372 0 2 0x2 syz-executor 68374 140011 31372 0 3 0x82 nanoslp syz-executor 1513 516347 31372 0 3 0x82 nanoslp syz-executor 86468 460064 0 0 3 0x14200 bored sosplice 31372 112923 76633 0 3 0x82 kqread syz-executor 76633 42580 55965 0 3 0x10008a sigsusp ksh 55965 14622 74476 0 3 0x98 kqread sshd-session 74476 107495 44858 0 3 0x92 kqread sshd-session 44858 467321 1 0 3 0x88 kqread sshd 96380 61495 78076 74 3 0x1100092 bpf pflogd 78076 384124 1 0 3 0x80 sbwait pflogd 41814 11612 33165 73 3 0x1100090 kqread syslogd 33165 376125 1 0 3 0x100082 sbwait syslogd 72794 30403 1 0 3 0x100080 kqread resolvd 27440 137358 48496 77 2 0x100092 dhcpleased 84463 495846 48496 77 3 0x100092 kqread dhcpleased 48496 513735 1 0 3 0x80 kqread dhcpleased 50097 436246 0 0 3 0x14200 bored smr 48424 409452 0 0 2 0x14200 zerothread 54406 360672 0 0 3 0x14200 aiodoned aiodoned 30383 132885 0 0 3 0x14200 syncer update 39221 328369 0 0 3 0x14200 cleaner cleaner 73057 366554 0 0 3 0x14200 reaper reaper 69885 70180 0 0 3 0x14200 pgdaemon pagedaemon 3426 520694 0 0 3 0x14200 bored viomb 77187 157959 0 0 3 0x40014200 acpi0 acpi0 33606 138702 0 0 3 0x40014200 idle1 83412 246933 0 0 3 0x14200 bored softnet7 46158 113291 0 0 3 0x14200 bored softnet6 37210 78581 0 0 3 0x14200 bored softnet5 78135 380900 0 0 3 0x14200 bored softnet4 38916 97671 0 0 3 0x14200 bored softnet3 68143 461926 0 0 3 0x14200 bored softnet2 20661 320470 0 0 3 0x14200 bored softnet1 88924 520435 0 0 3 0x14200 bored softnet0 61625 229883 0 0 3 0x14200 bored systqmp 51664 298389 0 0 3 0x14200 bored systq 70269 108274 0 0 3 0x14200 tmoslp softclockmp 94923 483087 0 0 3 0x40014200 tmoslp softclock 14619 354352 0 0 3 0x40014200 idle0 1 248612 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 74125 (ifconfig) thread 0xffff80003a82d258 (343734) Process 27740 (syz-executor) thread 0xffff80003a82da20 (34546) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10262 11127K 11907K 166960K 17414 0 pcb 17 18K 19K 166960K 1055 0 rtable 212 13K 14K 166960K 915 0 pf 43 19K 67486K 166960K 503 0 ifaddr 41 8K 8K 166960K 297 0 ifgroup 71 2K 3K 166960K 564 0 sysctl 4 1K 9K 166960K 41 0 counters 76 37K 39K 166960K 748 0 ioctlops 0 0K 4K 166960K 2285 0 iov 0 0K 24K 166960K 318 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1513 95K 96K 166960K 5892 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 5K 13K 166960K 74 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 176 0 dirhash 12 2K 3K 166960K 84 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 240K 166960K 4521 0 sigio 0 0K 0K 166960K 92 0 proc 82 147K 164K 166960K 1313 0 subproc 72 4K 4K 166960K 202 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 548 0 in_multi 74 5K 7K 166960K 373 0 ether_multi 1 0K 0K 166960K 34 0 mrt 1 0K 0K 166960K 21 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 1389 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 171K 185K 166960K 41183 0 UVM aobj 238 12K 12K 166960K 244 0 pinsyscall 44 88K 102K 166960K 5959 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 272 0 NDP 18 0K 1K 166960K 234 0 temp 75 8652K 8732K 166960K 218437 0 kqueue 13 20K 30K 166960K 850 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 489 0 485 4 3 1 3 0 8 0 rtentry 176 296 0 222 5 1 4 5 0 8 0 unpcb 144 3622 0 3601 25 24 1 6 0 8 0 syncache 336 23 0 23 11 10 1 1 0 8 1 tcpqe 32 11 0 11 3 3 0 1 0 8 0 tcpcb 736 1515 0 1501 29 24 5 7 0 8 3 arp 128 46 0 33 1 0 1 1 0 8 0 inpcb 328 5272 0 5250 47 39 8 15 0 8 4 nd6 144 52 0 39 1 0 1 1 0 8 0 pkpcb 40 58 0 58 6 5 1 1 0 8 1 kcovpl 48 22 0 14 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 283 0 283 4 3 1 1 0 8 1 pppxif 1504 79 0 79 5 5 0 2 0 8 0 pffrag 232 24 0 17 1 0 1 1 0 482 0 pffrnode 88 18 0 13 1 0 1 1 0 8 0 pffrent 40 45 0 36 1 0 1 1 0 8 0 pfosfp 40 1430 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 3 3 3 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 299 0 144 1 0 1 1 0 8 0 pfstkey 128 299 0 144 6 0 6 6 0 8 0 pfstate 384 299 0 144 16 0 16 16 0 8 0 pfrule 1344 30 0 25 2 1 1 2 0 8 0 rttmr 136 5 0 5 3 3 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1432 0 1090 38 13 25 28 0 8 0 art_table 40 1434 0 1090 6 1 5 5 0 8 0 art_node 32 295 0 234 1 0 1 1 0 8 0 sysvmsgpl 40 83 0 76 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 164 0 154 1 0 1 1 0 8 0 shmpl 112 241 0 6 7 0 7 7 0 8 0 dirhash 1024 65 0 48 3 0 3 3 0 8 0 dino2pl 256 9990 0 8457 97 1 96 96 0 8 0 ffsino 296 9990 0 8457 119 0 119 119 0 8 0 nchpl 144 16013 0 14288 64 0 64 64 0 8 0 rtmask 32 57 0 57 8 7 1 1 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 58020 0 58020 6 5 1 3 0 8 1 percpumem 16 389 0 336 1 0 1 1 0 8 0 kstatmem 264 396 0 356 5 2 3 4 0 8 0 acpiwqpl 32 4 0 4 1 0 1 1 1 8 1 scsiplug 72 32 0 32 6 5 1 1 0 8 1 scxspl 216 91221 0 91221 22 21 1 8 1 8 1 plimitpl 152 1328 0 1309 1 0 1 1 0 8 0 sigapl 424 4758 0 4702 7 0 7 7 0 8 0 knotepl 120 641 0 0 17 0 17 17 0 8 0 kqueuepl 224 1982 0 1972 18 13 5 5 0 8 3 pipepl 344 622 0 594 9 6 3 6 0 8 0 fdescpl 528 4712 0 4679 3 0 3 3 0 8 0 filepl 160 35188 0 34956 36 22 14 21 0 8 0 lockfpl 104 2853 0 2851 6 5 1 2 0 8 0 lockfspl 48 1047 0 1045 1 0 1 1 0 8 0 sessionpl 144 57 0 48 1 0 1 1 0 8 0 pgrppl 48 177 0 160 1 0 1 1 0 8 0 ucredpl 104 5993 0 5979 1 0 1 1 0 8 0 zombiepl 144 5792 0 5792 1 0 1 1 0 8 1 processpl 1232 4758 0 4702 5 0 5 5 0 8 0 procpl 664 12101 0 12032 7 0 7 7 0 8 0 sosppl 168 40 0 40 8 7 1 1 0 8 1 sockpl 752 9564 0 9517 80 69 11 21 0 8 4 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 55 0 0 6 0 6 6 0 8 0 mtagpl 96 86 0 0 3 0 3 3 0 8 0 mbufpl 256 447 0 0 24 0 24 24 0 8 0 bufpl 280 37486 0 31343 440 0 440 440 0 8 0 anonpl 32 17139 0 0 140 2 138 138 0 246 0 amapchunkpl 152 144411 0 143679 80 45 35 36 0 158 6 amappl16 200 13803 0 13691 82 66 16 37 0 8 1 amappl15 192 47 0 47 4 4 0 1 0 8 0 amappl14 184 180 0 168 1 0 1 1 0 8 0 amappl13 176 9 0 9 4 4 0 1 0 8 0 amappl12 168 5589 0 5556 3 1 2 2 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 47 0 46 1 0 1 1 0 8 0 amappl9 144 254 0 253 2 1 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 156 0 143 1 0 1 1 0 8 0 amappl6 120 325 0 319 1 0 1 1 0 8 0 amappl5 112 176 0 164 1 0 1 1 0 8 0 amappl4 104 395 0 373 1 0 1 1 0 8 0 amappl3 96 30361 0 30245 5 1 4 4 0 8 0 amappl2 88 989 0 924 2 0 2 2 0 8 0 amappl1 80 30801 0 30195 20 5 15 15 0 8 0 amappl 88 39432 0 39247 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 9 0 9 3 3 0 1 0 8 0 dma128 128 262 0 262 7 7 0 1 0 8 0 dma64 64 11 0 11 5 4 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 243 0 6 5 0 5 5 0 8 0 uaddrrnd 24 4712 0 4679 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4712 0 4679 1 0 1 1 0 8 0 vmmpekpl 168 34479 0 34416 4 0 4 4 0 8 0 vmmpepl 168 300482 0 298309 151 38 113 121 0 357 3 vmsppl 488 4711 0 4679 8 3 5 5 0 8 0 rwobjpl 80 81092 0 73865 168 11 157 160 0 8 2 pdppl 4096 9431 0 9358 141 68 73 83 0 8 0 pvpl 32 25141 0 0 203 1 202 202 0 265 0 pmappl 256 4711 0 4679 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 385 0 127 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83839ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c069480,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 uvm_fault(fffffd80612687d8,af43dc4d000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c069820,af43dc4d000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c069820) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7858a0c5aac0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff83839ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c069480,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83953130) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 uvm_fault(fffffd80612687d8,af43dc4d000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:700 upageflttrap(ffff80003c069820,af43dc4d000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c069820) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7858a0c5aac0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833706db) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833aefde,ffffffff833fd855,13c,ffffffff832f1c02) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001408800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80003c462e00) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800001457090,80206979,ffff80003c462e00,ffff80003a82d258) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a82d258,ffff80003c462fe0,ffff80003c462f30) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c462fe0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c462fe0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f010ad1ad30, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833706db) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833aefde,ffffffff833fd855,13c,ffffffff832f1c02) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001408800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80003c462e00) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800001457090,80206979,ffff80003c462e00,ffff80003a82d258) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a82d258,ffff80003c462fe0,ffff80003c462f30) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c462fe0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c462fe0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f010ad1ad30, count: -9