panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 322 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *415566 78809 0 0x2 0 1K ifconfig 393051 92768 77 0x100012 0x1 0 dhcpleased db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83437184) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e7c54,ffffffff833be4e8,142,ffffffff833c7d23) at __assert+0x29 tun_clone_destroy(ffff80000147f000) at tun_clone_destroy+0x38a sys/net/if_tun.c:322 if_clone_destroy(ffff80003c4f3eb0) at if_clone_destroy+0x1d7 sys/net/if.c:1383 ifioctl(ffff80000153ab98,80206979,ffff80003c4f3eb0,ffff80002a498558) at ifioctl+0x5c5 sys_ioctl(ffff80002a498558,ffff80003c4f4090,ffff80003c4f3fe0) at sys_ioctl+0x5c3 syscall(ffff80003c4f4090) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f4090) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1fe5b24680, 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 322 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83437184) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e7c54,ffffffff833be4e8,142,ffffffff833c7d23) at __assert+0x29 tun_clone_destroy(ffff80000147f000) at tun_clone_destroy+0x38a sys/net/if_tun.c:322 if_clone_destroy(ffff80003c4f3eb0) at if_clone_destroy+0x1d7 sys/net/if.c:1383 ifioctl(ffff80000153ab98,80206979,ffff80003c4f3eb0,ffff80002a498558) at ifioctl+0x5c5 sys_ioctl(ffff80002a498558,ffff80003c4f4090,ffff80003c4f3fe0) at sys_ioctl+0x5c3 syscall(ffff80003c4f4090) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f4090) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1fe5b24680, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4f3c60 rbx 0xffff800029aacdc7 rdx 0 rcx 0xffff80002a498558 rax 0xffff800029aabff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc7b0786b0b85eabf r11 0x2fc586b9e7c5661a r12 0xffff800029aacbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff821de0f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4f3c50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (ifconfig) tid=415566 pid=78809 tcnt=1 stat=onproc flags process=2 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a499c68,0xffffffff838b7b48 process=0xffff80003c4edda8 user=0xffff80003c4ef000, vmspace=0xfffffd806ae7e908 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *78809 415566 12597 0 7 0x2 ifconfig 12597 378254 42044 0 3 0x10008a sigsusp sh 42044 3214 26994 0 3 0x82 wait syz-executor 27297 359366 44898 0 3 0x90 nanoslp syz-executor 27297 94504 44898 0 3 0x4000090 kqread syz-executor 27297 446189 44898 0 3 0x4000090 fsleep syz-executor 37253 441804 35607 0 3 0x80 nanoslp syz-executor 37253 523573 35607 0 3 0x4000080 kqsel syz-executor 37253 299028 35607 0 3 0x4000080 kqsel syz-executor 37253 233467 35607 0 3 0x4000080 fsleep syz-executor 99200 497720 64337 0 3 0x80 nanoslp syz-executor 99200 82607 64337 0 3 0x4000080 pppxread syz-executor 99200 127792 64337 0 3 0x4000000 inode syz-executor 99200 117710 64337 0 3 0x4000080 fsleep syz-executor 14864 484631 0 0 3 0x14200 acct acct 84135 42432 0 0 3 0x14280 nfsidl nfsio 91127 88882 0 0 3 0x14280 nfsidl nfsio 72079 518765 0 0 3 0x14280 nfsidl nfsio 33310 21332 0 0 3 0x14280 nfsidl nfsio 15121 110283 0 0 3 0x14280 nfsidl nfsio 1079 261990 0 0 3 0x14280 nfsidl nfsio 28759 79354 0 0 3 0x14280 nfsidl nfsio 73701 79961 0 0 3 0x14280 nfsidl nfsio 98253 390824 0 0 3 0x14280 nfsidl nfsio 6111 312889 0 0 3 0x14280 nfsidl nfsio 21868 364433 0 0 3 0x14280 nfsidl nfsio 60643 183496 0 0 3 0x14280 nfsidl nfsio 52361 136317 0 0 3 0x14280 nfsidl nfsio 60495 195863 0 0 3 0x14280 nfsidl nfsio 65283 271725 0 0 3 0x14280 nfsidl nfsio 12925 327520 0 0 3 0x14280 nfsidl nfsio 86092 13433 0 0 3 0x14280 nfsidl nfsio 83627 261511 0 0 3 0x14280 nfsidl nfsio 66377 319143 0 0 3 0x14280 nfsidl nfsio 72409 85334 0 0 3 0x14280 nfsidl nfsio 64337 40025 26994 0 3 0x82 nanoslp syz-executor 96860 172823 1 0 3 0x100083 ttyin getty 57757 184086 26994 0 3 0x82 wait syz-executor 96472 309783 26994 0 3 0x82 nanoslp syz-executor 66141 401899 0 0 3 0x14200 bored sosplice 98654 330881 26994 0 3 0x2 inode syz-executor 31490 440203 26994 0 3 0x82 wait syz-executor 44898 472165 26994 0 3 0x82 nanoslp syz-executor 35607 275309 26994 0 3 0x82 nanoslp syz-executor 26994 169640 46040 0 3 0x82 kqread syz-executor 46040 330579 26111 0 3 0x10008a sigsusp ksh 26111 253086 49286 0 3 0x98 kqread sshd-session 49286 503575 4739 0 3 0x92 kqread sshd-session 4739 49925 1 0 3 0x88 kqread sshd 29688 134953 1197 74 3 0x1100092 bpf pflogd 1197 22842 1 0 3 0x80 sbwait pflogd 31010 46869 42239 73 3 0x1100090 kqread syslogd 42239 316581 1 0 3 0x100082 sbwait syslogd 35176 330463 1 0 3 0x100080 kqread resolvd 92768 393051 17828 77 7 0x100013 dhcpleased 49669 490465 17828 77 3 0x100092 kqread dhcpleased 17828 411408 1 0 3 0x80 kqread dhcpleased 28484 21179 0 0 3 0x14200 bored smr 81102 232324 0 0 3 0x14200 pgzero zerothread 34057 336795 0 0 3 0x14200 aiodoned aiodoned 95761 264907 0 0 3 0x14200 syncer update 8346 71182 0 0 3 0x14200 cleaner cleaner 3851 474160 0 0 3 0x14200 reaper reaper 45382 203848 0 0 3 0x14200 pgdaemon pagedaemon 46617 409892 0 0 3 0x14200 bored viomb 88589 273173 0 0 3 0x40014200 acpi0 acpi0 80302 224658 0 0 3 0x40014200 idle1 61264 510361 0 0 3 0x14200 bored softnet3 23089 276856 0 0 3 0x14200 bored softnet2 13614 128574 0 0 3 0x14200 bored softnet1 36404 243240 0 0 3 0x14200 bored softnet0 5805 233248 0 0 3 0x14200 bored systqmp 33974 198791 0 0 3 0x14200 bored systq 26428 77231 0 0 3 0x14200 tmoslp softclockmp 474 425172 0 0 3 0x40014200 tmoslp softclock 40675 29481 0 0 3 0x40014200 idle0 1 315031 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 78809 (ifconfig) thread 0xffff80002a498558 (415566) Process 99200 (syz-executor) thread 0xffff8000318aef88 (82607) Process 99200 (syz-executor) thread 0xffff8000318aecf8 (127792) Process 98654 (syz-executor) thread 0xffff8000ffffd1f8 (330881) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11042K 12660K 166960K 13213 0 pcb 17 14K 16K 166960K 260 0 rtable 175 7K 9K 166960K 544 0 pf 40 18K 21K 166960K 128 0 ifaddr 38 6K 7K 166960K 91 0 ifgroup 57 2K 2K 166960K 145 0 sysctl 3 1K 1K 166960K 3 0 counters 66 36K 37K 166960K 120 0 ioctlops 0 0K 4K 166960K 1645 0 iov 0 0K 16K 166960K 74 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1453 91K 91K 166960K 2292 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 47 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 232K 166960K 1201 0 sigio 0 0K 0K 166960K 25 0 proc 79 103K 128K 166960K 708 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 154 0 in_multi 73 5K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 540 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 73K 81K 166960K 12602 0 UVM aobj 70 5K 5K 166960K 75 0 pinsyscall 43 86K 104K 166960K 2367 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 51 0 NDP 13 0K 1K 166960K 59 0 temp 80 8644K 8717K 166960K 48490 0 kqueue 14 20K 28K 166960K 211 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 244 0 241 5 4 1 3 0 8 0 rtentry 112 163 0 89 4 0 4 4 0 8 0 unpcb 144 1005 0 981 10 8 2 6 0 8 0 syncache 336 7 0 7 5 4 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 388 0 383 15 14 1 8 0 8 0 arp 120 25 0 12 1 0 1 1 0 8 0 inpcb 376 1397 0 1385 21 19 2 8 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 36 0 20 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 10 0 9 1 0 1 1 0 8 0 pppxif 1472 5 0 5 3 3 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 6 0 2 2 1 1 1 0 482 0 pffrnode 88 6 0 2 2 1 1 1 0 8 0 pffrent 40 8 0 4 2 1 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 1 1 0 1 1 0 8 0 pfstitem 24 80 0 13 1 0 1 1 0 8 0 pfstkey 128 84 0 17 3 0 3 3 0 8 0 pfstate 376 81 0 15 7 0 7 7 0 8 0 pfrule 1344 35 0 27 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 719 0 332 31 5 26 29 0 8 0 art_table 32 722 0 332 4 0 4 4 0 8 0 art_node 16 158 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 45 0 42 1 0 1 1 0 8 0 semapl 112 44 0 34 1 0 1 1 0 8 0 shmpl 112 72 0 5 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3375 0 1863 95 0 95 95 0 8 0 ffsino 280 3375 0 1863 109 0 109 109 0 8 0 nchpl 144 4998 0 3292 64 0 64 64 0 8 0 uvmvnodes 80 4103 0 0 84 0 84 84 0 8 0 vnodes 216 4103 0 0 228 0 228 228 0 8 0 namei 1024 17190 0 17188 2 1 1 1 0 8 0 percpumem 16 74 0 27 1 0 1 1 0 8 0 kstatmem 264 68 0 42 2 0 2 2 0 8 0 scsiplug 72 6 0 6 4 3 1 1 0 8 1 scxspl 216 15425 0 15425 13 12 1 8 1 8 1 plimitpl 152 298 0 281 1 0 1 1 0 8 0 sigapl 424 1505 0 1433 10 1 9 9 0 8 0 futexpl 64 16294 0 16291 3 2 1 1 0 8 0 knotepl 120 773 0 0 24 0 24 24 0 8 0 kqueuepl 216 474 0 461 5 4 1 5 0 8 0 pipepl 328 232 0 205 5 2 3 5 0 8 0 fdescpl 504 1464 0 1432 5 0 5 5 0 8 0 filepl 152 9728 0 9491 19 8 11 15 0 8 0 lockfpl 104 383 0 381 1 0 1 1 0 8 0 lockfspl 48 141 0 139 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 55 0 37 1 0 1 1 0 8 0 ucredpl 104 1227 0 1211 1 0 1 1 0 8 0 zombiepl 144 1436 0 1433 1 0 1 1 0 8 0 processpl 1168 1505 0 1433 7 1 6 6 0 8 0 procpl 656 3219 0 3139 8 0 8 8 0 8 0 srpgc 96 8 0 8 2 2 0 1 0 8 0 sosppl 168 15 0 15 3 2 1 1 0 8 1 sockpl 688 2730 0 2691 35 30 5 15 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 22 0 0 1 0 1 1 0 8 0 mbufpl 256 623 0 0 39 0 39 39 0 8 0 bufpl 280 4461 0 131 310 0 310 310 0 8 0 anonpl 24 205639 0 202165 90 48 42 70 0 184 0 amapchunkpl 152 39892 0 39393 33 11 22 27 0 158 0 amappl16 200 4219 0 4188 43 37 6 24 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 2160 0 2128 4 2 2 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 258 0 258 2 2 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 118 0 106 1 0 1 1 0 8 0 amappl6 120 229 0 223 1 0 1 1 0 8 0 amappl5 112 136 0 125 1 0 1 1 0 8 0 amappl4 104 338 0 317 1 0 1 1 0 8 0 amappl3 96 8163 0 8048 5 1 4 4 0 8 0 amappl2 88 717 0 653 2 0 2 2 0 8 0 amappl1 80 11833 0 11249 16 2 14 14 0 8 0 amappl 88 12106 0 11934 5 0 5 5 0 92 0 dma32768 32768 2 0 2 1 1 0 1 0 8 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 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 74 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1464 0 1432 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1464 0 1432 1 0 1 1 0 8 0 vmmpekpl 168 12787 0 12733 3 0 3 3 0 8 0 vmmpepl 168 93823 0 91949 114 23 91 102 0 357 3 vmsppl 456 1463 0 1432 5 0 5 5 0 8 0 rwobjpl 64 30655 0 25518 86 3 83 83 0 8 0 pdppl 4096 2936 0 2864 116 42 74 86 0 8 2 pvpl 32 19557 0 0 160 2 158 158 0 265 0 pmappl 248 1463 0 1432 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 349 0 70 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83799ff0) 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 __mp_lock(ffffffff838f29a8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f29a8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838f29a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f29a8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrstruct(ffff8000ffffb720,ffffffff83449b9a,ffff80002a363e40,20) at ktrstruct+0xe2 sys/kern/kern_ktrace.c:313 sys_kevent(ffff8000ffffb720,ffff80002a3640d0,ffff80002a364020) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a3640d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3640d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7423873bf5d0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83799ff0) 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 __mp_lock(ffffffff838f29a8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f29a8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838f29a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f29a8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 ktrstruct(ffff8000ffffb720,ffffffff83449b9a,ffff80002a363e40,20) at ktrstruct+0xe2 sys/kern/kern_ktrace.c:313 sys_kevent(ffff8000ffffb720,ffff80002a3640d0,ffff80002a364020) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a3640d0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3640d0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7423873bf5d0, count: -11 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(ffffffff83437184) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e7c54,ffffffff833be4e8,142,ffffffff833c7d23) at __assert+0x29 tun_clone_destroy(ffff80000147f000) at tun_clone_destroy+0x38a sys/net/if_tun.c:322 if_clone_destroy(ffff80003c4f3eb0) at if_clone_destroy+0x1d7 sys/net/if.c:1383 ifioctl(ffff80000153ab98,80206979,ffff80003c4f3eb0,ffff80002a498558) at ifioctl+0x5c5 sys_ioctl(ffff80002a498558,ffff80003c4f4090,ffff80003c4f3fe0) at sys_ioctl+0x5c3 syscall(ffff80003c4f4090) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f4090) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1fe5b24680, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83437184) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e7c54,ffffffff833be4e8,142,ffffffff833c7d23) at __assert+0x29 tun_clone_destroy(ffff80000147f000) at tun_clone_destroy+0x38a sys/net/if_tun.c:322 if_clone_destroy(ffff80003c4f3eb0) at if_clone_destroy+0x1d7 sys/net/if.c:1383 ifioctl(ffff80000153ab98,80206979,ffff80003c4f3eb0,ffff80002a498558) at ifioctl+0x5c5 sys_ioctl(ffff80002a498558,ffff80003c4f4090,ffff80003c4f3fe0) at sys_ioctl+0x5c3 syscall(ffff80003c4f4090) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f4090) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a1fe5b24680, count: -9