panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 775 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 357434 75797 0 0 0x4000000 0 syz-executor *134199 54887 0 0x1000 0x4080000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f5419) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a98ec,ffffffff83007025,307,ffffffff8305f8d2) at __assert+0x29 splraise(deafbead) at splraise+0xbd sys/arch/amd64/amd64/intr.c:775 mtx_enter_try(ffff800001321608) at mtx_enter_try+0x97 sys/kern/kern_lock.c:266 mtx_enter(ffff800001321608) at mtx_enter+0x60 sys/kern/kern_lock.c:239 klist_mutex_lock(ffff800001321608) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012b9b80) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff8000012b1800) at bpfdetach+0xa6 if_detach(ffff8000012b1800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff8000012b1800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:346 if_clone_destroy(ffff800037271c70) at if_clone_destroy+0x1d7 sys/net/if.c:1382 ifioctl(ffff8000012947d8,80206979,ffff800037271c70,ffff8000371d82c8) at ifioctl+0x5c5 end trace frame: 0xffff800037271d70, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 775 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f5419) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a98ec,ffffffff83007025,307,ffffffff8305f8d2) at __assert+0x29 splraise(deafbead) at splraise+0xbd sys/arch/amd64/amd64/intr.c:775 mtx_enter_try(ffff800001321608) at mtx_enter_try+0x97 sys/kern/kern_lock.c:266 mtx_enter(ffff800001321608) at mtx_enter+0x60 sys/kern/kern_lock.c:239 klist_mutex_lock(ffff800001321608) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012b9b80) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff8000012b1800) at bpfdetach+0xa6 if_detach(ffff8000012b1800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff8000012b1800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:346 if_clone_destroy(ffff800037271c70) at if_clone_destroy+0x1d7 sys/net/if.c:1382 ifioctl(ffff8000012947d8,80206979,ffff800037271c70,ffff8000371d82c8) at ifioctl+0x5c5 sys_ioctl(ffff8000371d82c8,ffff800037271e50,ffff800037271da0) at sys_ioctl+0x67c syscall(ffff800037271e50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037271e50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x282839d9b30, count: -17 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000372717d0 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff8000371d82c8 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x721afc52f3c668ba r11 0x4639f2874c73d858 r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff817a0ea5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000372717c0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=134199 pid=54887 tcnt=2 stat=onproc flags process=1000 proc=4080000 runpri=32, usrpri=78, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000371d8550 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371d8550,0xffff8000371d8cf8 process=0xffff8000371d5220 user=0xffff80003726c000, vmspace=0xfffffd806be51568 estcpu=28, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10351 453878 89828 0 2 0 syz-executor 10351 185455 89828 0 2 0x4000000 syz-executor 56550 17023 7387 0 2 0 syz-executor 56550 271831 7387 0 3 0x4000080 fsleep syz-executor 51765 55937 46565 0 3 0x80 nanoslp syz-executor 51765 230335 46565 0 3 0x4000080 ttyin syz-executor 51765 486290 46565 0 3 0x4000080 fsleep syz-executor 75797 414512 49342 0 2 0 syz-executor 75797 357434 49342 0 7 0x4000000 syz-executor 24585 434533 26014 0 3 0x80 nanoslp syz-executor 24585 239192 26014 0 3 0x4000080 fsleep syz-executor 24585 291349 26014 0 3 0x4000080 fsleep syz-executor 26380 169192 14846 0 2 0 syz-executor 26380 58763 14846 0 2 0x4000000 syz-executor 26380 430640 14846 0 3 0x4000080 fsleep syz-executor 54887 134302 42012 0 3 0x3000 suspend syz-executor *54887 134199 42012 0 7 0x4081000 syz-executor 90394 74387 0 0 3 0x14200 bored sosplice 53314 53156 1 0 3 0x100083 ttyin getty 85622 117323 0 0 3 0x14280 nfsidl nfsio 47333 119218 0 0 3 0x14280 nfsidl nfsio 19255 512056 0 0 3 0x14280 nfsidl nfsio 96886 320501 0 0 3 0x14280 nfsidl nfsio 26044 117217 0 0 3 0x14280 nfsidl nfsio 44007 219345 0 0 3 0x14280 nfsidl nfsio 4119 501086 0 0 3 0x14280 nfsidl nfsio 67495 409573 0 0 3 0x14280 nfsidl nfsio 9166 399083 0 0 3 0x14280 nfsidl nfsio 90182 262120 0 0 3 0x14280 nfsidl nfsio 55571 215951 0 0 3 0x14280 nfsidl nfsio 43996 2255 0 0 3 0x14280 nfsidl nfsio 35663 180063 0 0 3 0x14280 nfsidl nfsio 14349 518072 0 0 3 0x14280 nfsidl nfsio 57706 31651 0 0 3 0x14280 nfsidl nfsio 83876 354272 0 0 3 0x14280 nfsidl nfsio 22314 382780 0 0 3 0x14280 nfsidl nfsio 16410 362399 0 0 3 0x14280 nfsidl nfsio 55600 403565 0 0 3 0x14280 nfsidl nfsio 91169 17039 0 0 3 0x14280 nfsidl nfsio 7387 251902 95891 0 3 0x82 nanoslp syz-executor 42012 113434 95891 0 3 0x82 nanoslp syz-executor 78490 262979 95891 0 3 0x82 wait syz-executor 26014 98126 95891 0 3 0x82 nanoslp syz-executor 89828 498514 95891 0 3 0x82 nanoslp syz-executor 46565 399192 95891 0 3 0x82 nanoslp syz-executor 14846 505758 95891 0 3 0x82 nanoslp syz-executor 49342 10514 95891 0 3 0x82 nanoslp syz-executor 95891 278054 52050 0 3 0x82 kqread syz-executor 52050 224537 13241 0 3 0x10008a sigsusp ksh 13241 232357 10470 0 3 0x98 kqread sshd-session 10470 116802 82933 0 3 0x92 kqread sshd-session 82933 78080 1 0 3 0x88 kqread sshd 35652 187260 13200 74 3 0x1100092 bpf pflogd 13200 485997 1 0 3 0x80 sbwait pflogd 22543 57887 26988 73 3 0x1100090 kqread syslogd 26988 384635 1 0 3 0x100082 sbwait syslogd 58144 51275 1 0 3 0x100080 kqread resolvd 45406 418090 49170 77 3 0x100092 kqread dhcpleased 68991 221742 49170 77 3 0x100092 kqread dhcpleased 49170 519644 1 0 3 0x80 kqread dhcpleased 82748 318920 0 0 3 0x14200 bored smr 83627 125870 0 0 2 0x14200 zerothread 54787 298146 0 0 3 0x14200 aiodoned aiodoned 73405 123974 0 0 3 0x14200 syncer update 39289 445713 0 0 3 0x14200 cleaner cleaner 51761 18214 0 0 3 0x14200 reaper reaper 44772 477438 0 0 3 0x14200 pgdaemon pagedaemon 60107 89908 0 0 3 0x14200 bored viomb 38094 172940 0 0 3 0x40014200 acpi0 acpi0 78316 47266 0 0 3 0x40014200 idle1 97547 410734 0 0 3 0x14200 bored softnet3 24629 420489 0 0 3 0x14200 bored softnet2 96659 204501 0 0 3 0x14200 bored softnet1 12418 366224 0 0 3 0x14200 bored softnet0 8792 223410 0 0 3 0x14200 bored systqmp 26267 335653 0 0 3 0x14200 bored systq 62843 174943 0 0 3 0x14200 tmoslp softclockmp 83576 519137 0 0 3 0x40014200 tmoslp softclock 49649 428456 0 0 3 0x40014200 idle0 1 472414 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 24585 (syz-executor) thread 0xffff80003359ca48 (239192) exclusive rwlock futex r = 0 (0xffffffff834a16d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 54887 (syz-executor) thread 0xffff8000371d82c8 (134199) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8363b0f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x2f2 sys/kern/kern_synch.c:425 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 lf_purgelocks+0x2f sys/kern/vfs_lockf.c:731 #6 vgonel+0x497 sys/kern/vfs_subr.c:1208 #7 vop_generic_revoke+0x3e6 sys/kern/vfs_default.c:128 #8 VOP_REVOKE+0x65 sys/kern/vfs_vops.c:291 #9 vdevgone+0x17b #10 bpfsdetach+0x117 sys/net/bpf.c:1802 #11 bpfdetach+0xa6 #12 if_detach+0x14f sys/net/if.c:1193 #13 tun_clone_destroy+0x2d6 sys/net/if_tun.c:346 #14 if_clone_destroy+0x1d7 sys/net/if.c:1382 #15 ifioctl+0x5c5 #16 sys_ioctl+0x67c #17 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #17 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #18 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff83437af0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 if_clone_destroy+0x67 #2 ifioctl+0x5c5 #3 sys_ioctl+0x67c #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 11131K 11445K 166960K 11535 0 pcb 17 12K 12K 166960K 57 0 rtable 241 7K 7K 166960K 377 0 pf 35 17K 19K 166960K 57 0 ifaddr 44 7K 7K 166960K 48 0 ifgroup 55 2K 2K 166960K 59 0 sysctl 2 0K 0K 166960K 2 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 12K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 91K 166960K 1586 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 3K 166960K 18 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 97K 166960K 313 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 128K 166960K 570 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 26 0 in_multi 103 7K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 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 414 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 73K 74K 166960K 4560 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 43 86K 104K 166960K 1391 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 13 0 NDP 12 0K 2K 166960K 30 0 temp 38 6814K 6886K 166960K 7089 0 kqueue 13 20K 26K 166960K 51 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 43 0 39 1 0 1 1 0 8 0 rtentry 112 117 0 5 4 0 4 4 0 8 0 unpcb 144 153 0 132 2 0 2 2 0 8 1 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 51 0 46 2 0 2 2 0 8 1 arp 120 19 0 1 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 3 0 3 1 0 1 1 0 8 1 inpcb 336 254 0 245 5 3 2 4 0 8 0 nd6 136 24 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 0 1 1 0 8 1 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 27 0 0 1 0 1 1 0 8 0 pfstkey 128 27 0 0 1 0 1 1 0 8 0 pfstate 376 27 0 0 3 0 3 3 0 8 0 pfrule 1344 23 0 16 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 482 0 2 30 0 30 30 0 8 0 art_table 32 484 0 2 4 0 4 4 0 8 0 art_node 16 115 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1890 0 383 95 0 95 95 0 8 0 ffsino 272 1890 0 383 102 0 102 102 0 8 0 nchpl 144 2335 0 650 63 0 63 63 0 8 0 uvmvnodes 80 2150 0 0 44 0 44 44 0 8 0 vnodes 216 2150 0 0 120 0 120 120 0 8 0 namei 1024 7762 0 7762 3 2 1 2 0 8 1 percpumem 16 48 0 2 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scxspl 216 6944 0 6944 10 9 1 8 1 8 1 plimitpl 152 50 0 32 1 0 1 1 0 8 0 sigapl 424 634 0 563 9 1 8 8 0 8 0 futexpl 64 2934 0 2929 1 0 1 1 0 8 0 knotepl 120 275 0 0 9 0 9 9 0 8 0 kqueuepl 216 66 0 57 1 0 1 1 0 8 0 pipepl 320 125 0 97 3 0 3 3 0 8 0 fdescpl 496 595 0 563 7 2 5 6 0 8 1 filepl 152 2972 0 2708 20 9 11 16 0 8 0 lockfpl 104 77 0 74 1 0 1 1 0 8 0 lockfspl 48 36 0 33 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 260 0 247 1 0 1 1 0 8 0 zombiepl 144 620 0 618 2 1 1 1 0 8 0 processpl 1160 634 0 563 6 0 6 6 0 8 0 procpl 648 970 0 889 9 1 8 8 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 664 456 0 421 7 3 4 6 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 140 0 0 18 0 18 18 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 152 0 0 10 0 10 10 0 8 0 bufpl 280 2478 0 101 170 0 170 170 0 8 0 anonpl 24 164459 0 161010 25 3 22 25 0 185 0 amapchunkpl 152 15054 0 14543 30 8 22 28 0 158 2 amappl16 200 4383 0 4361 5 3 2 5 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 117 0 105 1 0 1 1 0 8 0 amappl13 176 12 0 11 1 0 1 1 0 8 0 amappl12 168 1242 0 1210 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 144 0 144 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 107 0 95 1 0 1 1 0 8 0 amappl6 120 163 0 162 1 0 1 1 0 8 0 amappl5 112 140 0 129 1 0 1 1 0 8 0 amappl4 104 311 0 293 1 0 1 1 0 8 0 amappl3 96 2698 0 2599 3 0 3 3 0 8 0 amappl2 88 866 0 782 3 0 3 3 0 8 0 amappl1 80 8304 0 7743 15 1 14 14 0 8 0 amappl 88 4177 0 3998 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 595 0 563 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 595 0 563 1 0 1 1 0 8 0 vmmpekpl 168 6549 0 6515 3 0 3 3 0 8 0 vmmpepl 168 45098 0 43207 90 7 83 90 0 357 0 vmsppl 448 594 0 563 6 2 4 5 0 8 0 rwobjpl 56 19202 0 16128 44 0 44 44 0 8 0 pdppl 4096 1197 0 1126 107 36 71 87 0 8 0 pvpl 32 10800 0 0 88 0 88 88 0 265 0 pmappl 248 594 0 563 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 394 0 47 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834b9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff8363aef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 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(ffffffff8363aef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002d57cf60) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002d57cf60) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d16ee607c0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff834b9ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff8363aef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 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(ffffffff8363aef0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8363aef0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002d57cf60) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002d57cf60) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d16ee607c0, count: -9 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:437 panic(ffffffff830f5419) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a98ec,ffffffff83007025,307,ffffffff8305f8d2) at __assert+0x29 splraise(deafbead) at splraise+0xbd sys/arch/amd64/amd64/intr.c:775 mtx_enter_try(ffff800001321608) at mtx_enter_try+0x97 sys/kern/kern_lock.c:266 mtx_enter(ffff800001321608) at mtx_enter+0x60 sys/kern/kern_lock.c:239 klist_mutex_lock(ffff800001321608) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012b9b80) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff8000012b1800) at bpfdetach+0xa6 if_detach(ffff8000012b1800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff8000012b1800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:346 if_clone_destroy(ffff800037271c70) at if_clone_destroy+0x1d7 sys/net/if.c:1382 ifioctl(ffff8000012947d8,80206979,ffff800037271c70,ffff8000371d82c8) at ifioctl+0x5c5 end trace frame: 0xffff800037271d70, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f5419) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a98ec,ffffffff83007025,307,ffffffff8305f8d2) at __assert+0x29 splraise(deafbead) at splraise+0xbd sys/arch/amd64/amd64/intr.c:775 mtx_enter_try(ffff800001321608) at mtx_enter_try+0x97 sys/kern/kern_lock.c:266 mtx_enter(ffff800001321608) at mtx_enter+0x60 sys/kern/kern_lock.c:239 klist_mutex_lock(ffff800001321608) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000013216c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012b9b80) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff8000012b1800) at bpfdetach+0xa6 if_detach(ffff8000012b1800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff8000012b1800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:346 if_clone_destroy(ffff800037271c70) at if_clone_destroy+0x1d7 sys/net/if.c:1382 ifioctl(ffff8000012947d8,80206979,ffff800037271c70,ffff8000371d82c8) at ifioctl+0x5c5 sys_ioctl(ffff8000371d82c8,ffff800037271e50,ffff800037271da0) at sys_ioctl+0x67c syscall(ffff800037271e50) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800037271e50) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x282839d9b30, count: -17