panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 319 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *389697 80311 0 0x2 0 1K ifconfig db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c3fe4) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834ffdf2,ffffffff8354ecda,13f,ffffffff83443686) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001616000) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a2fe290) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff800010fdc300,80206979,ffff80002a2fe290,ffff80002a222d08) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a222d08,ffff80002a2fe470,ffff80002a2fe3c0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2fe470) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fe470) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72a04c54ecd0, 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 319 ddb{1}> show kasan No such command ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c3fe4) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834ffdf2,ffffffff8354ecda,13f,ffffffff83443686) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001616000) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a2fe290) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff800010fdc300,80206979,ffff80002a2fe290,ffff80002a222d08) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a222d08,ffff80002a2fe470,ffff80002a2fe3c0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2fe470) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fe470) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72a04c54ecd0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2fe040 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80002a222d08 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x953e5cd43f61039f r11 0x4a77bf1d8536ddc0 r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff826298e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a2fe030 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (ifconfig) tid=389697 pid=80311 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045fee548,0xffff800045fef4e8 process=0xffff800045ff44d8 user=0xffff80002a2f9000, vmspace=0xffffef806ccc1208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 1687 433193 4551 0 3 0x2 0 clonelk ifconfig 4551 325517 32040 0 3 0x100002 0x88 sigsusp sh 32040 60126 95604 0 3 0x2 0x80 wait syz-executor 74265 310089 86570 0 2 0x2 0 ifconfig *80311 389697 59774 0 7 0x2 0 ifconfig 55183 41314 56177 0 2 0x2 0 ifconfig 59774 186268 45723 0 3 0x100002 0x88 sigsusp sh 86570 192386 2082 0 3 0x100002 0x88 sigsusp sh 56177 292042 9017 0 3 0x100002 0x88 sigsusp sh 45723 116120 95604 0 3 0x2 0x80 wait syz-executor 9017 55401 95604 0 3 0x2 0x80 wait syz-executor 2082 329249 95604 0 3 0x2 0x80 wait syz-executor 25572 56867 95604 0 3 0x2 0x80 piperd syz-executor 60868 163226 0 0 3 0x14000 0x200 acct acct 95604 108277 16083 0 3 0x2 0x80 wait syz-executor 16083 93643 25092 0 3 0x100002 0x88 sigsusp ksh 25092 99480 50013 0 3 0x10 0x88 kqread sshd-session 50013 484894 37276 0 3 0x12 0x80 kqread sshd-session 54137 261708 1 0 3 0x100003 0x80 ttyin getty 37276 319103 1 0 3 0 0x88 kqread sshd 76362 248038 35936 74 3 0x1100012 0x80 bpf pflogd 35936 332694 1 0 3 0 0x80 sbwait pflogd 67303 351736 28998 73 3 0x1100010 0x80 kqread syslogd 28998 503116 1 0 3 0x100002 0x80 sbwait syslogd 34147 144119 1 0 3 0x100000 0x80 kqread resolvd 96978 427193 39041 77 2 0x100012 0 dhcpleased 8154 512596 39041 77 3 0x100012 0x80 kqread dhcpleased 39041 374669 1 0 3 0 0x80 kqread dhcpleased 64587 246894 0 0 3 0x14000 0x200 bored smr 76398 166068 0 0 2 0x14000 0x200 zerothread 17187 135134 0 0 3 0x14000 0x200 aiodoned aiodoned 85767 485085 0 0 3 0x14000 0x200 syncer update 78181 96773 0 0 3 0x14000 0x200 cleaner cleaner 82628 282366 0 0 3 0x14000 0x200 reaper reaper 37777 114485 0 0 3 0x14000 0x200 pgdaemon pagedaemon 84616 389446 0 0 3 0x14000 0x200 bored viomb 12143 131329 0 0 3 0x14000 0x40000200 acpi0 acpi0 32510 136735 0 0 3 0x14000 0x40000200 idle1 36195 19752 0 0 3 0x14000 0x200 bored softnet1 91399 425426 0 0 2 0x14000 0x200 softnet0 40330 164463 0 0 3 0x14000 0x200 smrbar systqmp 10662 135960 0 0 3 0x14000 0x200 bored systq 13391 32344 0 0 3 0x14000 0x200 tmoslp softclockmp 16205 397465 0 0 2 0x14000 0x40000200 softclock 64726 136146 0 0 3 0x14000 0x40000200 idle0 1 133939 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83b038f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 uvm_pmr_freepages+0x1b6 sys/uvm/uvm_pmemrange.c:-1 #3 uvm_anfree+0xe9 sys/uvm/uvm_anon.c:112 #4 amap_wipeout+0x1d6 sys/uvm/uvm_amap.c:-1 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 #6 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 #7 exit1+0x71b sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #10 Xsyscall+0x128 Process 80311 (ifconfig) thread 0xffff80002a222d08 (389697) exclusive rwlock clonelk r = 0 (0xffffffff83999168) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x93 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2160 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aed000) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 if_clone_destroy+0x93 sys/net/if.c:-1 #5 ifioctl+0x59d sys/net/if.c:2160 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #8 Xsyscall+0x128 Process 91399 (softnet0) thread 0xffff800045ffe530 (425426) shared rwlock softnet0 r = 0 (0xffff80000002c078) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 Process 40330 (systqmp) thread 0xffff800045ffe298 (164463) shared rwlock systqmp r = 0 (0xffffffff839da118) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11041 12075K 12284K 166960K 12299 0 pcb 17 15K 17K 166960K 117 0 rtable 131 4K 8K 166960K 694 0 pf 27 16K 18K 166960K 82 0 ifaddr 26 4K 7K 166960K 98 0 ifgroup 39 1K 2K 166960K 115 0 sysctl 1 1K 9K 166960K 5 0 counters 62 36K 37K 166960K 110 0 ioctlops 0 0K 4K 166960K 1510 0 iov 0 0K 2K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1357 85K 85K 166960K 1678 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 228K 166960K 425 0 sigio 0 0K 0K 166960K 2 0 proc 99 180K 180K 166960K 908 0 subproc 63 3K 4K 166960K 216 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 11 0 in_multi 44 2K 6K 166960K 223 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 551 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 187 170K 190K 166960K 4954 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 42 84K 106K 166960K 1904 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 16 1K 2K 166960K 68 0 temp 32 9114K 9134K 166960K 11888 0 kqueue 13 20K 24K 166960K 39 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 59 0 56 1 0 1 1 0 8 0 rtentry 176 233 0 178 6 0 6 6 0 8 2 unpcb 144 74 0 57 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 20 0 16 1 0 1 1 0 8 0 arp 136 40 0 32 1 0 1 1 0 8 0 inpcb 328 318 0 307 7 0 7 7 0 8 6 nd6 152 58 0 49 1 0 1 1 0 8 0 kcovpl 48 24 0 17 1 0 1 1 0 8 0 ppxss 1192 8 0 8 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 0 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 22 0 0 1 0 1 1 0 8 0 pfstkey 128 23 0 1 1 0 1 1 0 8 0 pfstate 448 23 0 1 3 0 3 3 0 8 0 pfrule 1360 22 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 954 0 631 30 3 27 30 0 8 4 art_table 40 955 0 631 5 0 5 5 0 8 0 art_node 32 233 0 173 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 72 9 0 4 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1736 0 235 94 0 94 94 0 8 0 ffsino 296 1736 0 235 116 0 116 116 0 8 0 nchpl 144 2045 0 294 65 0 65 65 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 vnodes 216 2119 0 0 118 0 118 118 0 8 0 namei 1024 8715 0 8715 2 1 1 2 0 8 1 percpumem 16 71 0 24 1 0 1 1 0 8 0 kstatmem 264 63 0 44 3 1 2 3 0 8 0 scxspl 216 7149 0 7149 4 3 1 3 1 8 1 plimitpl 152 55 0 38 1 0 1 1 0 8 0 sigapl 424 707 0 658 7 1 6 7 0 8 0 knotepl 120 94 0 0 3 0 3 3 0 8 0 kqueuepl 224 45 0 36 1 0 1 1 0 8 0 pipepl 344 220 0 193 6 0 6 6 0 8 3 fdescpl 528 690 0 659 3 0 3 3 0 8 0 filepl 160 2797 0 2604 15 0 15 15 0 8 5 lockfpl 104 56 0 54 1 0 1 1 0 8 0 lockfspl 48 27 0 25 1 0 1 1 0 8 0 sessionpl 144 43 0 34 1 0 1 1 0 8 0 pgrppl 48 69 0 52 1 0 1 1 0 8 0 ucredpl 104 152 0 139 1 0 1 1 0 8 0 zombiepl 144 661 0 658 1 0 1 1 0 8 0 processpl 1232 707 0 658 5 1 4 5 0 8 0 procpl 664 904 0 855 6 0 6 6 0 8 1 sockpl 752 451 0 420 10 0 10 10 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mextrefs 64 21 0 0 1 0 1 1 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 155 0 0 10 0 10 10 0 8 0 bufpl 272 2629 0 105 169 0 169 169 0 8 0 anonpl 32 3796 0 0 31 0 31 31 0 247 0 amapchunkpl 152 13606 0 13292 27 7 20 27 0 158 5 amappl16 200 1724 0 1718 7 4 3 5 0 8 2 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 582 0 577 1 0 1 1 0 8 0 amappl13 176 148 0 135 1 0 1 1 0 8 0 amappl12 168 993 0 967 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 87 0 72 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 148 0 141 1 0 1 1 0 8 0 amappl7 128 177 0 164 1 0 1 1 0 8 0 amappl6 120 305 0 296 1 0 1 1 0 8 0 amappl5 112 201 0 191 1 0 1 1 0 8 0 amappl4 104 328 0 308 1 0 1 1 0 8 0 amappl3 96 2452 0 2383 3 0 3 3 0 8 0 amappl2 88 765 0 694 2 0 2 2 0 8 0 amappl1 80 12415 0 11800 15 1 14 15 0 8 0 amappl 88 4003 0 3892 4 0 4 4 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 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 128 253 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 690 0 659 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 690 0 659 1 0 1 1 0 8 0 vmmpekpl 168 7833 0 7774 4 0 4 4 0 8 0 vmmpepl 168 53525 0 51875 88 1 87 88 0 357 9 vmsppl 488 689 0 658 5 0 5 5 0 8 0 rwobjpl 80 18112 0 17095 24 1 23 24 0 8 0 pdppl 4096 1387 0 1316 111 36 75 85 0 8 4 pvpl 32 9836 0 0 81 1 80 80 0 265 0 pmappl 256 689 0 658 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 455 0 44 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8392fff0) 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(ffffffff83aec800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aec800) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000363a34e8,43,0,1) at exit1+0x720 sys/kern/kern_exit.c:260 sys_exit(ffff8000363a34e8,ffff80002a324b40,ffff80002a324a90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a324b40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a324b40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d2dea37d940, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8392fff0) 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(ffffffff83aec800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83aec800) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000363a34e8,43,0,1) at exit1+0x720 sys/kern/kern_exit.c:260 sys_exit(ffff8000363a34e8,ffff80002a324b40,ffff80002a324a90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a324b40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a324b40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d2dea37d940, count: -8 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(ffffffff834c3fe4) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834ffdf2,ffffffff8354ecda,13f,ffffffff83443686) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001616000) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a2fe290) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff800010fdc300,80206979,ffff80002a2fe290,ffff80002a222d08) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a222d08,ffff80002a2fe470,ffff80002a2fe3c0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2fe470) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fe470) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72a04c54ecd0, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c3fe4) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834ffdf2,ffffffff8354ecda,13f,ffffffff83443686) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001616000) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a2fe290) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff800010fdc300,80206979,ffff80002a2fe290,ffff80002a222d08) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a222d08,ffff80002a2fe470,ffff80002a2fe3c0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2fe470) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fe470) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72a04c54ecd0, count: -9