login: kernel: protection fault trap, code=0 Stopped at bpfdetach+0x70: movq 0(%r15),%r12 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace bpfdetach(ffff80000148c800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000148c800) at if_detach+0x1bb sys/net/if.c:1200 tun_clone_destroy(ffff80000148c800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:340 if_clone_destroy(ffff80002a2d53d0) at if_clone_destroy+0x1d7 sys/net/if.c:1389 ifioctl(ffff8000015d83a0,80206979,ffff80002a2d53d0,ffff80002a3c3230) at ifioctl+0x5c5 sys/net/if.c:-1 sys_ioctl(ffff80002a3c3230,ffff80002a2d55b0,ffff80002a2d5500) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80002a2d55b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d55b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x53ab27ecb20, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2d51f0 rbx 0x80206979 __kernel_virt_to_phys+0x206979 rdx 0 rcx 0xffff80002a3c3230 rax 0xffffffff837fbff0 cpu_info_full_primary+0x1ff0 r8 0x44b82fa09b5a53 r9 0 r10 0x99ebb719535a1cb9 r11 0x8e40f1a9bafe3f1b r12 0xdead0002dead4110 r13 0x800 r14 0xffff80000148c800 r15 0xdead0002dead4110 rip 0xffffffff8265f970 bpfdetach+0x70 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2d51c0 ss 0 bpfdetach+0x70: movq 0(%r15),%r12 ddb{0}> show proc PROC (syz-executor) tid=365712 pid=51570 tcnt=2 stat=onproc flags process=1000 proc=4080000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000337f94a0 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000337f94a0,0xffff80002a3c2570 process=0xffff80002a311d70 user=0xffff80002a2d0000, vmspace=0xfffffd806ef14990 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54580 513279 37265 0 3 0 kmmaplk syz-executor 54580 34222 37265 0 2 0x4000000 syz-executor 697 447765 7146 -1 2 0x10 syz-executor 697 241699 7146 -1 3 0x4000090 fifor syz-executor 697 411970 7146 -1 3 0x4000010 inode syz-executor 51570 446623 88932 0 3 0x3000 suspend syz-executor *51570 365712 88932 0 7 0x4081000 syz-executor 40896 433476 29465 0 3 0x80 nanoslp syz-executor 40896 372266 29465 0 3 0x4000080 netcon syz-executor 40896 18047 29465 0 3 0x4000080 fsleep syz-executor 40896 76176 29465 0 3 0x4000080 fsleep syz-executor 88932 39292 76919 0 3 0x82 nanoslp syz-executor 73556 357036 1 0 3 0x100083 ttyin getty 11812 458406 76919 0 3 0x82 nanoslp syz-executor 29284 457007 76919 0 3 0x82 nanoslp syz-executor 55427 453694 0 0 3 0x14200 bored sosplice 29465 355255 76919 0 3 0x82 nanoslp syz-executor 50248 495302 76919 0 3 0x82 nanoslp syz-executor 7146 150178 76919 0 3 0x82 nanoslp syz-executor 33353 192269 76919 0 3 0x82 wait syz-executor 37265 131353 76919 0 3 0x82 nanoslp syz-executor 76919 416203 1551 0 3 0x82 kqread syz-executor 1551 130746 76669 0 3 0x10008a sigsusp ksh 76669 111496 22366 0 3 0x98 kqread sshd-session 22366 493762 48900 0 3 0x92 kqread sshd-session 48900 284027 1 0 3 0x88 kqread sshd 63445 218253 26796 74 3 0x1100092 bpf pflogd 26796 433100 1 0 3 0x80 sbwait pflogd 17275 502153 41196 73 3 0x1100090 kqread syslogd 41196 170351 1 0 3 0x100082 sbwait syslogd 71198 240194 1 0 3 0x100080 kqread resolvd 58842 231186 98157 77 3 0x100092 kqread dhcpleased 11492 484029 98157 77 3 0x100092 kqread dhcpleased 98157 373866 1 0 3 0x80 kqread dhcpleased 2946 3371 0 0 3 0x14200 bored smr 41250 99920 0 0 2 0x14200 zerothread 88027 32756 0 0 3 0x14200 aiodoned aiodoned 51100 376699 0 0 3 0x14200 syncer update 65548 98566 0 0 3 0x14200 cleaner cleaner 85610 481856 0 0 2 0x14200 reaper 34587 21918 0 0 3 0x14200 pgdaemon pagedaemon 84463 466141 0 0 3 0x14200 bored viomb 23812 54555 0 0 3 0x40014200 acpi0 acpi0 28378 513383 0 0 3 0x40014200 idle1 63198 458429 0 0 3 0x14200 bored softnet7 89095 6180 0 0 3 0x14200 bored softnet6 90916 477839 0 0 3 0x14200 bored softnet5 84132 350889 0 0 3 0x14200 bored softnet4 4869 77937 0 0 3 0x14200 bored softnet3 28602 74624 0 0 3 0x14200 bored softnet2 69836 242369 0 0 3 0x14200 bored softnet1 91303 226571 0 0 3 0x14200 bored softnet0 89567 484733 0 0 3 0x14200 bored systqmp 62457 12812 0 0 3 0x14200 bored systq 27662 238515 0 0 3 0x14200 tmoslp softclockmp 22165 212427 0 0 2 0x40014200 softclock 36447 160284 0 0 3 0x40014200 idle0 1 432007 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 54580 (syz-executor) thread 0xffff80002a3c2fa0 (34222) exclusive rrwlock inode r = 0 (0xfffffd806f07d458) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:693 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 vn_open+0x13f sys/kern/vfs_vnops.c:140 #12 doopenat+0x32e sys/kern/vfs_syscalls.c:1137 #13 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 Process 697 (syz-executor) thread 0xffff8000337f8020 (411970) exclusive rrwlock inode r = 0 (0xfffffd807e44ad58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:693 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 vn_open+0x13f sys/kern/vfs_vnops.c:140 #12 doopenat+0x32e sys/kern/vfs_syscalls.c:1137 #13 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 Process 51570 (syz-executor) thread 0xffff80002a3c3230 (365712) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a04d58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2da sys/kern/kern_synch.c:366 #3 rw_do_enter_write+0x1d7 sys/kern/kern_rwlock.c:298 #4 lf_purgelocks+0x2f sys/kern/vfs_lockf.c:731 #5 vgonel+0x497 sys/kern/vfs_subr.c:1223 #6 vop_generic_revoke+0x3e6 sys/kern/vfs_default.c:124 #7 VOP_REVOKE+0x65 sys/kern/vfs_vops.c:291 #8 vdevgone+0x17b sys/kern/vfs_subr.c:-1 #9 bpfsdetach+0x140 sys/net/bpf.c:1794 #10 bpfdetach+0xa6 sys/net/bpf.c:-1 #11 if_detach+0x1bb sys/net/if.c:1200 #12 tun_clone_destroy+0x2d6 sys/net/if_tun.c:340 #13 if_clone_destroy+0x1d7 sys/net/if.c:1389 #14 ifioctl+0x5c5 sys/net/if.c:-1 #15 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #16 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #17 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff838cbc18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x5c5 sys/net/if.c:-1 #4 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 Process 85610 (reaper) thread 0xffff8000ffffc008 (481856) exclusive rwlock kmmaplk r = 0 (0xffffffff83a1fac8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1cb sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10256 11249K 11511K 166960K 13736 0 pcb 18 17K 33K 166960K 459 0 rtable 181 9K 10K 166960K 552 0 pf 35 18K 67486K 166960K 135 0 ifaddr 35 6K 8K 166960K 103 0 ifgroup 47 2K 2K 166960K 146 0 sysctl 4 1K 9K 166960K 13 0 counters 64 36K 38K 166960K 232 0 ioctlops 0 0K 4K 166960K 1937 0 iov 0 0K 32K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 93K 166960K 2982 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 111 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 236K 166960K 1457 0 sigio 0 0K 0K 166960K 29 0 proc 72 115K 180K 166960K 827 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 174 0 in_multi 77 5K 7K 166960K 179 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 367 1632K 1632K 166960K 367 0 exec 0 0K 1K 166960K 617 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 238 168K 186K 166960K 14702 0 UVM aobj 71 5K 5K 166960K 74 0 pinsyscall 41 82K 102K 166960K 2740 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 71 0 NDP 10 0K 2K 166960K 70 0 temp 78 8684K 8812K 166960K 51589 0 kqueue 14 22K 30K 166960K 272 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 155 0 151 1 0 1 1 0 8 0 rtentry 176 175 0 106 5 0 5 5 0 8 0 unpcb 144 1090 0 1068 9 5 4 6 0 8 3 syncache 336 11 0 11 3 2 1 1 0 8 1 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 608 0 600 10 6 4 7 0 8 3 arp 128 21 0 12 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 2202 0 2190 23 16 7 15 0 8 5 nd6 144 30 0 16 1 0 1 1 0 8 0 pkpcb 40 80 0 80 2 2 0 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 72 0 72 2 1 1 1 0 8 1 pppxif 1504 34 0 34 2 2 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 12 0 2 1 0 1 1 0 482 0 pffrnode 88 11 0 2 1 0 1 1 0 8 0 pffrent 40 14 0 4 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 96 0 20 1 0 1 1 0 8 0 pfstkey 128 97 0 21 3 0 3 3 0 8 0 pfstate 384 96 0 21 8 0 8 8 0 8 0 pfrule 1344 25 0 17 2 0 2 2 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 778 0 428 32 5 27 28 0 8 1 art_table 40 782 0 428 5 0 5 5 0 8 0 art_node 32 174 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semapl 112 106 0 96 1 0 1 1 0 8 0 shmpl 112 71 0 3 2 0 2 2 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 4054 0 2540 96 0 96 96 0 8 1 ffsino 296 4054 0 2540 117 0 117 117 0 8 0 nchpl 144 6030 0 4322 64 0 64 64 0 8 0 rtmask 32 9 0 9 2 2 0 1 0 8 0 uvmvnodes 80 5182 0 0 106 0 106 106 0 8 0 vnodes 216 5182 0 0 288 0 288 288 0 8 0 namei 1024 22624 0 22623 4 3 1 2 0 8 0 percpumem 16 131 0 84 1 0 1 1 0 8 0 kstatmem 264 90 0 68 4 1 3 3 0 8 1 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 44747 0 44747 13 9 4 8 1 8 4 plimitpl 152 564 0 544 1 0 1 1 0 8 0 sigapl 424 1784 0 1729 9 0 9 9 0 8 1 knotepl 120 522 0 0 16 0 16 16 0 8 0 kqueuepl 224 764 0 754 12 7 5 5 0 8 4 pipepl 344 313 0 286 6 3 3 6 0 8 0 fdescpl 528 1736 0 1706 3 0 3 3 0 8 0 filepl 160 13049 0 12821 29 11 18 20 0 8 5 lockfpl 104 1347 0 1344 5 3 2 3 0 8 1 lockfspl 48 590 0 587 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 2245 0 2231 1 0 1 1 0 8 0 zombiepl 144 2161 0 2156 1 0 1 1 0 8 0 processpl 1248 1784 0 1729 7 0 7 7 0 8 0 procpl 656 3985 0 3921 9 0 9 9 0 8 1 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 752 3640 0 3602 47 36 11 21 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 94 0 0 3 0 3 3 0 8 0 mbufpl 256 1215 0 0 75 0 75 75 0 8 0 bufpl 280 18736 0 12594 440 0 440 440 0 8 0 anonpl 32 15820 0 0 128 0 128 128 0 246 0 amapchunkpl 152 50221 0 49741 39 10 29 31 0 158 5 amappl16 200 6703 0 6667 66 52 14 36 0 8 3 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 142 0 130 1 0 1 1 0 8 0 amappl13 176 77 0 77 2 2 0 1 0 8 0 amappl12 168 2487 0 2457 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 53 0 51 1 0 1 1 0 8 0 amappl7 128 161 0 147 1 0 1 1 0 8 0 amappl6 120 233 0 230 1 0 1 1 0 8 0 amappl5 112 144 0 134 1 0 1 1 0 8 0 amappl4 104 352 0 331 1 0 1 1 0 8 0 amappl3 96 10005 0 9894 5 1 4 4 0 8 0 amappl2 88 814 0 749 2 0 2 2 0 8 0 amappl1 80 15939 0 15349 17 1 16 16 0 8 1 amappl 88 13612 0 13449 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 2 2 0 2 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 73 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1736 0 1706 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1736 0 1706 1 0 1 1 0 8 0 vmmpekpl 168 15464 0 15407 3 0 3 3 0 8 0 vmmpepl 168 117388 0 115403 125 22 103 118 0 357 1 vmsppl 488 1735 0 1704 5 0 5 5 0 8 0 rwobjpl 80 38620 0 32427 132 2 130 130 0 8 0 pdppl 4096 3480 0 3408 114 42 72 84 0 8 0 pvpl 32 24188 0 0 196 0 196 196 0 265 0 pmappl 256 1735 0 1704 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 377 0 66 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace bpfdetach(ffff80000148c800) at bpfdetach+0x70 sys/net/bpf.c:1770 if_detach(ffff80000148c800) at if_detach+0x1bb sys/net/if.c:1200 tun_clone_destroy(ffff80000148c800) at tun_clone_destroy+0x2d6 sys/net/if_tun.c:340 if_clone_destroy(ffff80002a2d53d0) at if_clone_destroy+0x1d7 sys/net/if.c:1389 ifioctl(ffff8000015d83a0,80206979,ffff80002a2d53d0,ffff80002a3c3230) at ifioctl+0x5c5 sys/net/if.c:-1 sys_ioctl(ffff80002a3c3230,ffff80002a2d55b0,ffff80002a2d5500) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80002a2d55b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d55b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x53ab27ecb20, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(ffffffff83a04b50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a04b50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff8000337f9c50,0,0,1) at exit1+0x728 sys/kern/kern_exit.c:260 sys_exit(ffff8000337f9c50,ffff80002a3d7650,ffff80002a3d75a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3d7650) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3d7650) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x792c5ba969e0, count: -8