uvm_fault(0xfffffd807383da68, 0x8, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x266: movl 0x8(%r15),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND 250704 73977 0 0x1000 0x4080000 0 syz-executor * 51372 84819 0 0x1000 0x4080000 1K syz-executor witness_checkorder(ffff80000162f018,9,0) at witness_checkorder+0x266 sys/kern/subr_witness.c:794 mtx_enter(ffff80000162f008) at mtx_enter+0x47 sys/kern/kern_lock.c:238 klist_mutex_lock(ffff80000162f008) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff800001583500) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff800001545000) at bpfdetach+0xa6 if_detach(ffff800001545000) at if_detach+0x14f sys/net/if.c:1195 tun_clone_destroy(ffff800001545000) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:339 if_clone_destroy(ffff80003720d580) at if_clone_destroy+0x1d7 sys/net/if.c:1384 ifioctl(ffff8000015d2fa8,80206979,ffff80003720d580,ffff8000371f8550) at ifioctl+0x5c5 sys_ioctl(ffff8000371f8550,ffff80003720d760,ffff80003720d6b0) at sys_ioctl+0x67c syscall(ffff80003720d760) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003720d760) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b83d50bd80, count: 2 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: uvm_fault(0xfffffd807383da68, 0x8, 0, 1) -> e ddb{1}> trace witness_checkorder(ffff80000162f018,9,0) at witness_checkorder+0x266 sys/kern/subr_witness.c:794 mtx_enter(ffff80000162f008) at mtx_enter+0x47 sys/kern/kern_lock.c:238 klist_mutex_lock(ffff80000162f008) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff800001583500) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff800001545000) at bpfdetach+0xa6 if_detach(ffff800001545000) at if_detach+0x14f sys/net/if.c:1195 tun_clone_destroy(ffff800001545000) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:339 if_clone_destroy(ffff80003720d580) at if_clone_destroy+0x1d7 sys/net/if.c:1384 ifioctl(ffff8000015d2fa8,80206979,ffff80003720d580,ffff8000371f8550) at ifioctl+0x5c5 sys_ioctl(ffff8000371f8550,ffff80003720d760,ffff80003720d6b0) at sys_ioctl+0x67c syscall(ffff80003720d760) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003720d760) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b83d50bd80, count: -13 ddb{1}> show registers rdi 0xffff80002a36f000 rsi 0x37d84 acpi_pdirpa+0x23bf5 rbp 0xffff80003720d240 rbx 0 rdx 0xffff80002a36f000 rcx 0x37d83 acpi_pdirpa+0x23bf4 rax 0xffffffff82896f6e witness_checkorder+0x22e r8 0 r9 0x1 r10 0x1749463136141fe4 r11 0x8dcaafb85ae60398 r12 0 r13 0xdeaf4152deaf4152 r14 0xffff80000162f018 r15 0 rip 0xffffffff82896fa6 witness_checkorder+0x266 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003720d190 ss 0x10 witness_checkorder+0x266: movl 0x8(%r15),%r12d ddb{1}> show proc PROC (syz-executor) tid=51372 pid=84819 tcnt=2 stat=onproc flags process=1000 proc=4080000 runpri=32, usrpri=79, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000371f9c18 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371f9c18,0xffff80002a03ef58 process=0xffff800037298d98 user=0xffff800037208000, vmspace=0xfffffd807383da68 estcpu=29, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30331 490768 81605 0 2 0 syz-executor 30331 429591 81605 0 2 0x4000000 syz-executor 73977 296883 82786 0 2 0x81000 syz-executor 73977 413108 82786 0 3 0x4003000 suspend syz-executor 73977 250704 82786 0 7 0x4081000 syz-executor 84819 178561 98703 0 3 0x3000 suspend syz-executor *84819 51372 98703 0 7 0x4081000 syz-executor 58979 16884 0 0 3 0x14280 nfsidl nfsio 60196 467576 0 0 3 0x14280 nfsidl nfsio 42740 471893 0 0 3 0x14280 nfsidl nfsio 38000 498789 0 0 3 0x14280 nfsidl nfsio 85368 79284 0 0 3 0x14280 nfsidl nfsio 37194 287276 0 0 3 0x14280 nfsidl nfsio 45679 502220 0 0 3 0x14280 nfsidl nfsio 702 385596 0 0 3 0x14280 nfsidl nfsio 93959 439112 0 0 3 0x14280 nfsidl nfsio 8957 125718 0 0 3 0x14280 nfsidl nfsio 41970 256333 0 0 3 0x14280 nfsidl nfsio 90185 434096 0 0 3 0x14280 nfsidl nfsio 26516 196583 0 0 3 0x14280 nfsidl nfsio 94172 394057 0 0 3 0x14280 nfsidl nfsio 81737 190977 0 0 3 0x14280 nfsidl nfsio 34120 504531 0 0 3 0x14280 nfsidl nfsio 4645 75984 0 0 3 0x14280 nfsidl nfsio 51439 399449 0 0 3 0x14280 nfsidl nfsio 81079 112545 0 0 3 0x14280 nfsidl nfsio 20378 3344 0 0 3 0x14280 nfsidl nfsio 97917 176790 1849 0 3 0x82 wait syz-executor 39182 251735 1849 0 3 0x82 wait syz-executor 82786 49477 1849 0 3 0x82 wait syz-executor 81605 268680 1849 0 2 0x2 syz-executor 71472 297720 1849 0 3 0x82 wait syz-executor 98703 351163 1849 0 3 0x82 wait syz-executor 94194 306015 1849 0 3 0x82 wait syz-executor 49875 493298 1 0 3 0x100083 ttyopn getty 71656 279222 30955 0 3 0x82 netio sshd-session 82997 348546 0 0 3 0x14200 bored sosplice 64891 276704 99285 0 3 0x100082 sbwait arp 99285 69679 76529 0 3 0x10008a sigsusp sh 76529 143180 1849 0 3 0x82 wait syz-executor 1849 128309 82747 0 3 0x82 kqread syz-executor 82747 196061 67750 0 3 0x10008a sigsusp ksh 67750 310435 44509 0 3 0x98 kqread sshd-session 44509 22105 30955 0 3 0x92 kqread sshd-session 30955 423714 1 0 3 0x88 kqread sshd 92087 406661 44889 74 3 0x1100092 bpf pflogd 44889 13618 1 0 3 0x80 sbwait pflogd 50005 306048 3894 73 3 0x1100010 ffs_fsync syslogd 3894 365366 1 0 3 0x100082 sbwait syslogd 26237 301755 1 0 3 0x100080 kqread resolvd 6051 316331 3877 77 3 0x100092 kqread dhcpleased 18721 167791 3877 77 3 0x100092 kqread dhcpleased 3877 399831 1 0 3 0x80 kqread dhcpleased 69166 126059 0 0 3 0x14200 bored smr 46153 56463 0 0 3 0x14200 pgzero zerothread 6398 173749 0 0 3 0x14200 aiodoned aiodoned 29741 117288 0 0 3 0x14200 syncer update 72473 186783 0 0 3 0x14200 cleaner cleaner 68269 358693 0 0 2 0x14200 reaper 17525 416341 0 0 3 0x14200 pgdaemon pagedaemon 72032 82087 0 0 3 0x14200 bored viomb 67985 163766 0 0 3 0x40014200 acpi0 acpi0 7160 225800 0 0 3 0x40014200 idle1 87338 407921 0 0 3 0x14200 bored softnet3 43697 506871 0 0 3 0x14200 bored softnet2 53692 183921 0 0 3 0x14200 bored softnet1 18605 482448 0 0 3 0x14200 bored softnet0 50307 148112 0 0 3 0x14200 bored systqmp 61705 415623 0 0 3 0x14200 bored systq 85863 213914 0 0 3 0x14200 tmoslp softclockmp 66073 17585 0 0 3 0x40014200 tmoslp softclock 70643 120126 0 0 3 0x40014200 idle0 1 108453 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 73977 (syz-executor) thread 0xffff8000371f91f8 (250704) exclusive rwlock rlimitlk r = 0 (0xffffffff8344f6c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 dosetrlimit+0xb7 sys/kern/kern_resource.c:258 #2 sys_setrlimit+0x124 sys/kern/kern_resource.c:242 #3 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #3 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 84819 (syz-executor) thread 0xffff8000371f8550 (51372) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8357f2f0) #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+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #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:1206 #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:1195 #13 tun_clone_destroy+0x2d6 sys/net/if_tun.c:339 #14 if_clone_destroy+0x1d7 sys/net/if.c:1384 #15 ifioctl+0x5c5 #16 sys_ioctl+0x67c #17 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #17 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #18 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff8341da10) #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:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 50005 (syslogd) thread 0xffff8000ffffdbe8 (306048) exclusive rrwlock inode r = 0 (0xfffffd806e1233d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 68269 (reaper) thread 0xffff800029fd8f38 (358693) exclusive rwlock vmmaplk r = 0 (0xfffffd807383d478) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2466 #4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #5 reaper+0x246 sys/kern/kern_exit.c:480 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 14191K 14517K 166960K 11632 0 pcb 18 14K 16K 166960K 64 0 rtable 228 7K 8K 166960K 602 0 pf 37 18K 22K 166960K 94 0 ifaddr 41 7K 7K 166960K 78 0 ifgroup 55 2K 2K 166960K 92 0 counters 64 36K 36K 166960K 84 0 ioctlops 0 0K 4K 166960K 1509 0 iov 0 0K 20K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1373 86K 87K 166960K 1674 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 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 492 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 128K 166960K 767 0 subproc 104 6K 6K 166960K 195 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 89 6K 6K 166960K 180 0 ether_multi 1 0K 0K 166960K 5 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 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 480 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 262 75K 97K 166960K 5825 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 45 90K 106K 166960K 1758 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 12 0K 1K 166960K 51 0 temp 46 6813K 6880K 166960K 8445 0 kqueue 13 20K 28K 166960K 70 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 69 0 64 1 0 1 1 0 8 0 rtentry 112 197 0 93 4 0 4 4 0 8 0 unpcb 144 273 0 255 4 3 1 4 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 808 152 0 146 8 6 2 8 0 8 0 arp 120 35 0 17 1 0 1 1 0 8 0 inpcb 336 602 0 590 17 15 2 12 0 8 0 nd6 136 49 0 28 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 1 0 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 6 0 2 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 58 0 21 1 0 1 1 0 8 0 pfstkey 128 63 0 26 2 0 2 2 0 8 0 pfstate 376 61 0 24 5 0 5 5 0 8 0 pfrule 1344 25 0 18 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 786 0 365 27 0 27 27 0 8 0 art_table 32 788 0 365 4 0 4 4 0 8 0 art_node 16 196 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2020 0 498 96 0 96 96 0 8 0 ffsino 272 2020 0 498 102 0 102 102 0 8 0 nchpl 144 2582 0 888 63 0 63 63 0 8 0 uvmvnodes 80 2356 0 0 49 0 49 49 0 8 0 vnodes 216 2356 0 0 131 0 131 131 0 8 0 namei 1024 9229 0 9229 2 1 1 2 0 8 1 percpumem 16 56 0 10 1 0 1 1 0 8 0 kstatmem 264 44 0 20 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 14074 0 14071 10 2 8 8 1 8 7 plimitpl 152 76 0 55 1 0 1 1 0 8 0 sigapl 424 803 0 730 9 0 9 9 0 8 0 futexpl 64 4181 0 4181 2 1 1 1 0 8 1 knotepl 120 320 0 0 10 0 10 10 0 8 0 kqueuepl 216 165 0 155 5 4 1 5 0 8 0 pipepl 320 150 0 122 3 0 3 3 0 8 0 fdescpl 496 764 0 732 5 0 5 5 0 8 0 filepl 152 3846 0 3585 19 6 13 15 0 8 1 lockfpl 104 120 0 115 1 0 1 1 0 8 0 lockfspl 48 52 0 47 1 0 1 1 0 8 0 sessionpl 144 32 0 22 1 0 1 1 0 8 0 pgrppl 48 116 0 98 1 0 1 1 0 8 0 ucredpl 104 404 0 391 1 0 1 1 0 8 0 zombiepl 144 767 0 760 1 0 1 1 0 8 0 processpl 1160 803 0 730 6 0 6 6 0 8 0 procpl 648 1280 0 1196 9 1 8 8 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 664 951 0 915 20 16 4 14 0 8 0 mcl64k 65536 2 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 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 218 0 0 28 0 28 28 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 248 0 0 15 0 15 15 0 8 0 bufpl 280 7972 0 1533 461 0 461 461 0 8 0 anonpl 24 188442 0 179965 84 23 61 61 0 185 9 amapchunkpl 152 19757 0 18936 46 10 36 36 0 158 4 amappl16 200 3810 0 3791 17 15 2 14 0 8 0 amappl15 192 12 0 12 2 2 0 1 0 8 0 amappl14 184 132 0 118 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 2 0 1 0 8 0 amappl12 168 1519 0 1484 4 2 2 3 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 143 0 143 1 1 0 1 0 8 0 amappl8 136 36 0 34 1 0 1 1 0 8 0 amappl7 128 119 0 105 1 0 1 1 0 8 0 amappl6 120 235 0 232 1 0 1 1 0 8 0 amappl5 112 177 0 164 1 0 1 1 0 8 0 amappl4 104 329 0 312 1 0 1 1 0 8 0 amappl3 96 3675 0 3544 4 0 4 4 0 8 0 amappl2 88 785 0 707 2 0 2 2 0 8 0 amappl1 80 9462 0 8766 16 0 16 16 0 8 0 amappl 88 5364 0 5173 5 0 5 5 0 92 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 764 0 731 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 764 0 731 1 0 1 1 0 8 0 vmmpekpl 168 7640 0 7583 3 0 3 3 0 8 0 vmmpepl 168 54537 0 52454 101 9 92 101 0 357 0 vmsppl 440 763 0 730 6 2 4 5 0 8 0 rwobjpl 56 21287 0 17822 50 1 49 49 0 8 0 pdppl 4096 1535 0 1460 109 31 78 85 0 8 3 pvpl 32 29834 0 0 242 1 241 241 0 265 0 pmappl 248 763 0 730 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 418 0 57 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834d7ff0) 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(ffffffff8357f0e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8357f0e8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800037249b00,ffff800000079e80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff8357f0e8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8357f0e8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 single_thread_check_locked(ffff8000371f91f8,0) at single_thread_check_locked+0x2b5 sys/kern/kern_sig.c:2034 userret(ffff8000371f91f8) at userret+0x9c sys/kern/kern_sig.c:1973 syscall(ffff800037249db0) at syscall+0x9a7 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff800037249db0) at syscall+0x9a7 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc81160eaad0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff834d7ff0) 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(ffffffff8357f0e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8357f0e8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800037249b00,ffff800000079e80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff8357f0e8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8357f0e8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 single_thread_check_locked(ffff8000371f91f8,0) at single_thread_check_locked+0x2b5 sys/kern/kern_sig.c:2034 userret(ffff8000371f91f8) at userret+0x9c sys/kern/kern_sig.c:1973 syscall(ffff800037249db0) at syscall+0x9a7 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff800037249db0) at syscall+0x9a7 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc81160eaad0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x266: movl 0x8(%r15),%r12d witness_checkorder(ffff80000162f018,9,0) at witness_checkorder+0x266 sys/kern/subr_witness.c:794 mtx_enter(ffff80000162f008) at mtx_enter+0x47 sys/kern/kern_lock.c:238 klist_mutex_lock(ffff80000162f008) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff800001583500) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff800001545000) at bpfdetach+0xa6 if_detach(ffff800001545000) at if_detach+0x14f sys/net/if.c:1195 tun_clone_destroy(ffff800001545000) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:339 if_clone_destroy(ffff80003720d580) at if_clone_destroy+0x1d7 sys/net/if.c:1384 ifioctl(ffff8000015d2fa8,80206979,ffff80003720d580,ffff8000371f8550) at ifioctl+0x5c5 sys_ioctl(ffff8000371f8550,ffff80003720d760,ffff80003720d6b0) at sys_ioctl+0x67c syscall(ffff80003720d760) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003720d760) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b83d50bd80, count: 2 ddb{1}> trace witness_checkorder(ffff80000162f018,9,0) at witness_checkorder+0x266 sys/kern/subr_witness.c:794 mtx_enter(ffff80000162f008) at mtx_enter+0x47 sys/kern/kern_lock.c:238 klist_mutex_lock(ffff80000162f008) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff80000162f0c8) at klist_invalidate+0xef sys/kern/kern_event.c:2283 bpfsdetach(ffff800001583500) at bpfsdetach+0x12f sys/net/bpf.c:1800 bpfdetach(ffff800001545000) at bpfdetach+0xa6 if_detach(ffff800001545000) at if_detach+0x14f sys/net/if.c:1195 tun_clone_destroy(ffff800001545000) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:339 if_clone_destroy(ffff80003720d580) at if_clone_destroy+0x1d7 sys/net/if.c:1384 ifioctl(ffff8000015d2fa8,80206979,ffff80003720d580,ffff8000371f8550) at ifioctl+0x5c5 sys_ioctl(ffff8000371f8550,ffff80003720d760,ffff80003720d6b0) at sys_ioctl+0x67c syscall(ffff80003720d760) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003720d760) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b83d50bd80, count: -13