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 *335025 71455 0 0x2 0 1K ifconfig db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c43ee) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8350147a,ffffffff835502e8,13f,ffffffff83444c4b) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001584800) at tun_clone_destroy+0x38a if_clone_destroy(ffff800032f960d0) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff8000015ab790,80206979,ffff800032f960d0,ffff80002a22d238) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a22d238,ffff800032f962b0,ffff800032f96200) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032f962b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032f962b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed291759d10, 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(ffffffff834c43ee) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8350147a,ffffffff835502e8,13f,ffffffff83444c4b) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001584800) at tun_clone_destroy+0x38a if_clone_destroy(ffff800032f960d0) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff8000015ab790,80206979,ffff800032f960d0,ffff80002a22d238) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a22d238,ffff800032f962b0,ffff800032f96200) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032f962b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032f962b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed291759d10, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800032f95e80 rbx 0xffff80002999ee0f rdx 0 rcx 0xffff80002a22d238 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe69c33d4c35b4b7a r11 0x4dd243f786b8ce14 r12 0xffff80002999ec10 r13 0 r14 0 r15 0x1 rip 0xffffffff8298b875 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800032f95e70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (ifconfig) tid=335025 pid=71455 tcnt=1 stat=onproc flags process=2 proc=0 runpri=83, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a22da00,0xffff80002a22d778 process=0xffff800045ff04e0 user=0xffff800032f91000, vmspace=0xfffff7806fb93990 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 7629 210296 89253 0 2 0x100000 0 sh *71455 335025 99147 0 7 0x2 0 ifconfig 99147 316590 38615 0 3 0x100002 0x88 sigsusp sh 89253 292963 95954 0 2 0x100002 0 sh 6915 462436 68271 0 2 0x100002 0 sh 43185 230195 23073 0 3 0x100002 0x88 sigsusp sh 38615 42074 91041 0 3 0x2 0x80 wait syz-executor 23073 13301 91041 0 3 0x2 0x80 wait syz-executor 95954 442909 91041 0 3 0x2 0x80 wait syz-executor 68271 407203 91041 0 3 0x2 0x80 wait syz-executor 51164 192015 1 0 3 0 0x80 nanoslp init 91582 453851 91041 0 2 0x2 0 syz-executor 23865 112633 91041 0 3 0x2 0x80 piperd syz-executor 58154 12022 0 0 3 0x14000 0x200 acct acct 91041 362327 1 0 3 0x2 0x80 nanoslp syz-executor 63052 342366 0 0 2 0x14000 0x40000200 smr 16113 130232 0 0 2 0x14000 0x200 zerothread 30707 272621 0 0 3 0x14000 0x200 aiodoned aiodoned 48460 270223 0 0 3 0x14000 0x200 syncer update 58413 33995 0 0 3 0x14000 0x200 cleaner cleaner 22553 65429 0 0 3 0x14000 0x200 reaper reaper 70171 401458 0 0 3 0x14000 0x200 pgdaemon pagedaemon 9003 110263 0 0 3 0x14000 0x200 bored viomb 20300 282052 0 0 3 0x14000 0x40000200 acpi0 acpi0 65940 399958 0 0 3 0x14000 0x40000200 idle1 28323 321364 0 0 3 0x14000 0x200 bored softnet1 60219 208135 0 0 3 0x14000 0x200 bored softnet0 31334 147869 0 0 3 0x14000 0x200 smrbar systqmp 43602 88594 0 0 3 0x14000 0x200 bored systq 85670 34157 0 0 3 0x14000 0x200 tmoslp softclockmp 94680 325951 0 0 3 0x14000 0x40000200 tmoslp softclock 32134 415052 0 0 3 0x14000 0x40000200 idle0 1 281932 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 71455 (ifconfig) thread 0xffff80002a22d238 (335025) exclusive rwlock clonelk r = 0 (0xffffffff839570a8) #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 (0xffffffff83b22f00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ifioctl+0x58c sys/net/if.c:2160 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #4 Xsyscall+0x128 Process 91582 (syz-executor) thread 0xffff80002a22ba08 (453851) exclusive rrwlock inode r = 0 (0xfffff7806e2c22f8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff7806c860590) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 31334 (systqmp) thread 0xffff800045ffecf8 (147869) shared rwlock systqmp r = 0 (0xffffffff839a6258) #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 11049 12017K 12152K 166960K 12395 0 pcb 17 12K 12K 166960K 61 0 rtable 124 13K 16K 166960K 1658 0 pf 36 18K 22K 166960K 182 0 ifaddr 24 3K 7K 166960K 237 0 ifgroup 51 2K 2K 166960K 283 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 208 0 ioctlops 0 0K 4K 166960K 1586 0 iov 0 0K 16K 166960K 75 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1325 83K 84K 166960K 1950 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 49K 93K 166960K 998 0 sigio 0 0K 0K 166960K 2 0 proc 18 33K 196K 166960K 1829 0 subproc 54 3K 4K 166960K 495 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 21 0 in_multi 33 2K 6K 166960K 564 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 976 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 74 64K 177K 166960K 8762 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 15 30K 104K 166960K 3327 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 2K 166960K 171 0 temp 27 9117K 9193K 166960K 16924 0 kqueue 1 2K 26K 166960K 64 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 120 126 0 126 1 0 1 1 0 8 1 rtentry 176 575 0 530 6 1 5 6 0 8 1 unpcb 144 204 0 204 4 0 4 4 0 8 4 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 736 84 0 83 4 3 1 4 0 8 0 arp 136 102 0 96 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 7 0 5 1 0 1 1 0 8 0 inpcb 328 509 0 507 6 5 1 6 0 8 0 nd6 152 151 0 144 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 55 0 49 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 16 0 16 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 1 0 1 0 8 0 pfstscr 40 21 0 21 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 1 0 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 pfstitem 24 46 0 9 1 0 1 1 0 8 0 pfstkey 128 74 0 37 2 0 2 2 0 8 0 pfstate 448 59 0 23 5 0 5 5 0 8 0 pfrule 1360 21 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 2329 0 2086 32 5 27 32 0 8 4 art_table 40 2330 0 2086 6 0 6 6 0 8 0 art_node 32 575 0 515 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 48 0 39 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1998 0 415 100 0 100 100 0 8 0 ffsino 296 1998 0 415 123 0 123 123 0 8 0 nchpl 144 2456 0 588 70 0 70 70 0 8 0 rtmask 32 5 0 5 1 1 0 1 0 8 0 vnodes 216 2616 0 0 146 0 146 146 0 8 0 namei 1024 13852 0 13852 4 2 2 2 0 8 2 percpumem 16 120 0 70 1 0 1 1 0 8 0 kstatmem 264 147 0 120 3 0 3 3 0 8 0 scxspl 216 9275 0 9275 11 3 8 8 1 8 8 plimitpl 152 106 0 98 1 0 1 1 0 8 0 sigapl 424 1236 0 1201 7 1 6 7 0 8 1 knotepl 120 324 0 0 10 0 10 10 0 8 0 kqueuepl 224 108 0 107 1 0 1 1 0 8 0 pipepl 344 290 0 263 4 1 3 4 0 8 0 fdescpl 528 1219 0 1203 3 0 3 3 0 8 0 filepl 160 4225 0 4101 15 3 12 13 0 8 1 lockfpl 104 144 0 144 1 0 1 1 0 8 1 lockfspl 48 36 0 36 1 0 1 1 0 8 1 sessionpl 144 76 0 74 1 0 1 1 0 8 0 pgrppl 48 132 0 123 1 0 1 1 0 8 0 ucredpl 104 294 0 291 1 0 1 1 0 8 0 zombiepl 144 1203 0 1201 1 0 1 1 0 8 0 processpl 1232 1236 0 1201 5 1 4 5 0 8 0 procpl 664 1716 0 1681 6 0 6 6 0 8 1 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 913 0 911 16 7 9 10 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mextrefs 64 19 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 170 0 0 11 0 11 11 0 8 0 bufpl 272 3225 0 108 208 0 208 208 0 8 0 anonpl 32 6423 0 0 52 0 52 52 0 247 0 amapchunkpl 152 23468 0 23290 28 4 24 25 0 158 12 amappl16 200 1689 0 1686 13 3 10 11 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 985 0 980 1 0 1 1 0 8 0 amappl13 176 216 0 216 1 0 1 1 0 8 1 amappl12 168 1649 0 1636 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 71 0 71 1 0 1 1 0 8 1 amappl9 144 293 0 293 1 1 0 1 0 8 0 amappl8 136 290 0 288 1 0 1 1 0 8 0 amappl7 128 241 0 239 1 0 1 1 0 8 0 amappl6 120 594 0 588 1 0 1 1 0 8 0 amappl5 112 101 0 101 1 0 1 1 0 8 1 amappl4 104 455 0 452 1 0 1 1 0 8 0 amappl3 96 4423 0 4392 3 0 3 3 0 8 0 amappl2 88 1173 0 1158 2 0 2 2 0 8 0 amappl1 80 17046 0 16966 14 0 14 14 0 8 8 amappl 88 7216 0 7154 5 1 4 5 0 92 0 uvmvnodes 80 104 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 1219 0 1203 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1219 0 1203 1 0 1 1 0 8 0 vmmpekpl 168 11318 0 11264 4 0 4 4 0 8 0 vmmpepl 168 87092 0 86618 91 3 88 91 0 357 56 vmsppl 488 1218 0 1202 5 0 5 5 0 8 1 rwobjpl 80 26319 0 25993 26 0 26 26 0 8 6 pdppl 4096 2445 0 2404 137 94 43 85 0 8 2 pvpl 32 14228 0 0 116 1 115 115 0 265 0 pmappl 256 1218 0 1202 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 537 0 109 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff839ccff0) 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(ffffffff83b22700) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b22700) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83b22700) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b22700) at __mp_lock+0x199 sys/kern/kern_lock.c:173 exit1(ffff80002a22c010,0,0,1) at exit1+0x720 sys/kern/kern_exit.c:260 sys_exit(ffff80002a22c010,ffff80002a2e4a90,ffff80002a2e49e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2e4a90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e4a90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b66c979fa20, count: 3 ddb{0}> trace x86_ipi_db(ffffffff839ccff0) 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(ffffffff83b22700) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b22700) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83b22700) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b22700) at __mp_lock+0x199 sys/kern/kern_lock.c:173 exit1(ffff80002a22c010,0,0,1) at exit1+0x720 sys/kern/kern_exit.c:260 sys_exit(ffff80002a22c010,ffff80002a2e4a90,ffff80002a2e49e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2e4a90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2e4a90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b66c979fa20, count: -12 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(ffffffff834c43ee) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8350147a,ffffffff835502e8,13f,ffffffff83444c4b) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001584800) at tun_clone_destroy+0x38a if_clone_destroy(ffff800032f960d0) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff8000015ab790,80206979,ffff800032f960d0,ffff80002a22d238) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a22d238,ffff800032f962b0,ffff800032f96200) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032f962b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032f962b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed291759d10, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c43ee) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8350147a,ffffffff835502e8,13f,ffffffff83444c4b) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff800001584800) at tun_clone_destroy+0x38a if_clone_destroy(ffff800032f960d0) at if_clone_destroy+0x205 sys/net/if.c:1479 ifioctl(ffff8000015ab790,80206979,ffff800032f960d0,ffff80002a22d238) at ifioctl+0x59d sys/net/if.c:2160 sys_ioctl(ffff80002a22d238,ffff800032f962b0,ffff800032f96200) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800032f962b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032f962b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed291759d10, count: -9 ddb{1}>