witness: lock order reversal: 1st 0xffffffff83951268 &sched_lock (&sched_lock) 2nd 0xffffffff8386ce30 &cq->cq_mtx (&cq->cq_mtx) lock order [1] &sched_lock (&sched_lock) -> [2] &cq->cq_mtx (&cq->cq_mtx) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 #2 mi_switch+0x187 sys/kern/sched_bsd.c:376 #3 ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] #3 ast+0x15a sys/arch/amd64/amd64/trap.c:739 #4 intr_user_exit+0x3c lock order [2] &cq->cq_mtx (&cq->cq_mtx) -> [1] &sched_lock (&sched_lock) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 sleep_setup+0xed sys/kern/kern_synch.c:304 #2 msleep_nsec+0x10b sys/kern/kern_synch.c:217 #3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 #4 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #4 dtclose+0x109 sys/dev/dt/dt_dev.c:239 #5 spec_close+0x466 sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x121 sys/kern/kern_descrip.c:1280 #9 closef+0x192 sys/kern/kern_descrip.c:1264 #10 fdfree+0x116 sys/kern/kern_descrip.c:1195 #11 exit1+0x576 sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8386ce30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffffffff8386ce20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffffffff8386c2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 ast(ffff80003c46d5d0) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff80003c46d5d0) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x783a0ac39d20, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c46d3d0 rbx 0 rdx 0 rcx 0xffff8000fffeca80 rax 0xffffffff8386bff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003c46d2b0 r9 0x8080808080808080 r10 0xe23222b6fffaa76e r11 0x8498d4903155e763 r12 0xfffffd8003f49300 r13 0xfffffd80046f6330 r14 0x3 r15 0xffffffff8341a390 substchar+0x2e9f rip 0xffffffff825c0155 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c46d3c0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=137990 pid=12104 tcnt=3 stat=run flags process=4000000 proc=0 runpri=50, usrpri=50, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0x0, list=0xffff8000fffe67f0,0xffff8000fffedcb8 process=0xffff8000ffff6688 user=0xffff80003c468000, vmspace=0xfffffd806c96f5d0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68229 141191 0 0 3 0x14280 nfsidl nfsio 52648 387414 0 0 3 0x14280 nfsidl nfsio 555 436359 0 0 3 0x14280 nfsidl nfsio 76661 235822 0 0 3 0x14280 nfsidl nfsio 36283 111741 0 0 3 0x14280 nfsidl nfsio 11176 44978 0 0 3 0x14280 nfsidl nfsio 77342 354816 0 0 3 0x14280 nfsidl nfsio 21049 146083 0 0 3 0x14280 nfsidl nfsio 67649 165729 0 0 3 0x14280 nfsidl nfsio 1518 202733 0 0 3 0x14280 nfsidl nfsio 20071 65175 0 0 3 0x14280 nfsidl nfsio 50348 391003 0 0 3 0x14280 nfsidl nfsio 91713 99485 0 0 3 0x14280 nfsidl nfsio 79905 425532 0 0 3 0x14280 nfsidl nfsio 85623 392952 0 0 3 0x14280 nfsidl nfsio 29999 443589 0 0 3 0x14280 nfsidl nfsio 73480 458624 0 0 3 0x14280 nfsidl nfsio 32589 367366 0 0 3 0x14280 nfsidl nfsio 47161 202678 0 0 3 0x14280 nfsidl nfsio 92159 282038 0 0 3 0x14280 nfsidl nfsio *12104 137990 16362 0 2 0x4000000 syz-executor 12104 418536 16362 0 2 0x4000000 syz-executor 12104 17488 16362 0 3 0x4000080 fsleep syz-executor 27768 204243 26776 60929 2 0x10 syz-executor 27768 65418 26776 60929 2 0x4000010 syz-executor 25450 120611 52868 -1 3 0x90 nanoslp syz-executor 25450 431236 52868 -1 3 0x4000090 msgwait syz-executor 25450 397699 52868 -1 3 0x4000090 fsleep syz-executor 32772 134423 32900 0 3 0x80 nanoslp syz-executor 32772 252900 32900 0 3 0x4000080 ttyout syz-executor 32772 392143 32900 0 3 0x4000080 ttyout syz-executor 32772 49079 32900 0 3 0x4000080 fsleep syz-executor 71304 368429 51287 0 3 0x80 nanoslp syz-executor 71304 111674 51287 0 3 0x4000080 kqsel syz-executor 71304 199808 51287 0 3 0x4000080 kqsel syz-executor 71304 254877 51287 0 3 0x4000080 fsleep syz-executor 39606 355296 30805 0 3 0x80 nanoslp syz-executor 39606 303132 30805 0 3 0x4000080 kqsel syz-executor 39606 469902 30805 0 3 0x4000080 kqread syz-executor 39606 146524 30805 0 3 0x4000080 fsleep syz-executor 53456 376831 88643 0 3 0x80 nanoslp syz-executor 53456 55245 88643 0 3 0x4000080 ttyretype syz-executor 53456 191425 88643 0 3 0x4000080 fsleep syz-executor 71888 64212 154 0 3 0x3000 suspend syz-executor 71888 405552 154 0 2 0x4081000 syz-executor 71888 276378 154 0 3 0x4081000 inode syz-executor 154 33444 62534 0 3 0x82 nanoslp syz-executor 11101 145247 0 0 3 0x14200 acct acct 26776 487508 62534 0 3 0x82 nanoslp syz-executor 92601 122146 1 0 3 0x100083 ttyin getty 88643 168135 62534 0 3 0x82 nanoslp syz-executor 30805 297480 62534 0 3 0x82 nanoslp syz-executor 16362 428496 62534 0 3 0x82 nanoslp syz-executor 52868 367361 62534 0 3 0x82 nanoslp syz-executor 51287 135336 62534 0 3 0x82 nanoslp syz-executor 32900 30185 62534 0 3 0x82 nanoslp syz-executor 62534 1161 54615 0 2 0x2 syz-executor 54615 508225 25344 0 3 0x10008a sigsusp ksh 25344 492844 87118 0 3 0x98 kqread sshd-session 87118 107039 1497 0 3 0x92 kqread sshd-session 1497 450324 1 0 3 0x88 kqread sshd 14408 461470 5362 74 3 0x1100092 bpf pflogd 5362 161624 1 0 3 0x80 sbwait pflogd 81058 438133 57589 73 3 0x1100090 kqread syslogd 57589 184103 1 0 3 0x100082 sbwait syslogd 35420 328784 1 0 3 0x100080 kqread resolvd 80721 121740 32223 77 3 0x100092 kqread dhcpleased 61368 299914 32223 77 3 0x100092 kqread dhcpleased 32223 114696 1 0 3 0x80 kqread dhcpleased 19812 307001 0 0 3 0x14200 bored smr 71087 224168 0 0 2 0x14200 zerothread 4825 175514 0 0 3 0x14200 aiodoned aiodoned 96112 99138 0 0 3 0x14200 syncer update 37677 30642 0 0 3 0x14200 cleaner cleaner 66611 15412 0 0 3 0x14200 reaper reaper 74997 278370 0 0 3 0x14200 pgdaemon pagedaemon 71447 397070 0 0 3 0x14200 bored viomb 94008 252771 0 0 3 0x40014200 acpi0 acpi0 84693 10718 0 0 7 0x40014200 idle1 33565 121491 0 0 3 0x14200 bored softnet1 23548 240456 0 0 3 0x14200 bored softnet0 68237 458947 0 0 3 0x14200 bored systqmp 13899 285998 0 0 3 0x14200 bored systq 40579 361996 0 0 3 0x14200 tmoslp softclockmp 15444 282934 0 0 3 0x40014200 tmoslp softclock 49366 257351 0 0 3 0x40014200 idle0 1 453040 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83951268) #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 preempt+0x35 sys/kern/sched_bsd.c:338 #3 ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] #3 ast+0x15a sys/arch/amd64/amd64/trap.c:739 #4 intr_user_exit+0x3c Process 71888 (syz-executor) thread 0xffff8000fffe7cb0 (405552) exclusive rrwlock inode r = 0 (0xfffffd806e8c2818) #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:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 71888 (syz-executor) thread 0xffff8000fffe74e8 (276378) exclusive rrwlock inode r = 0 (0xfffffd806c7a2ec0) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dofstatat+0xf2 sys/kern/vfs_syscalls.c:2086 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11105 12308K 12679K 166960K 15256 0 pcb 20 14K 15K 166960K 237 0 rtable 229 11K 11K 166960K 681 0 pf 32 17K 81K 166960K 139 0 ifaddr 38 6K 8K 166960K 117 0 ifgroup 51 2K 2K 166960K 170 0 sysctl 4 1K 9K 166960K 12 0 counters 68 36K 37K 166960K 212 0 ioctlops 0 0K 4K 166960K 1759 0 iov 0 0K 24K 166960K 101 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1401 88K 89K 166960K 2856 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 7K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 48 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 232K 166960K 1545 0 sigio 0 0K 0K 166960K 62 0 proc 72 115K 180K 166960K 807 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 360 0 in_multi 84 6K 7K 166960K 204 0 ether_multi 1 0K 0K 166960K 15 0 mrt 0 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 604 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 274 163K 175K 166960K 15608 0 UVM aobj 44 12K 12K 166960K 47 0 pinsyscall 43 86K 100K 166960K 2840 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 136 0 NDP 11 0K 2K 166960K 79 0 temp 76 8679K 8758K 166960K 63521 0 kqueue 16 26K 30K 166960K 283 0 SYN cache 2 8K 16K 166960K 3 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 120 221 0 217 4 3 1 3 0 8 0 rtentry 176 215 0 123 6 0 6 6 0 8 0 unpcb 144 1184 0 1163 11 9 2 8 0 8 1 syncache 336 8 0 8 3 3 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 518 0 510 9 5 4 7 0 8 3 arp 136 35 0 17 1 0 1 1 0 8 0 inpcb 328 1690 0 1671 19 11 8 9 0 8 6 nd6 152 45 0 22 2 0 2 2 0 8 0 pkpcb 40 13 0 13 2 1 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1192 58 0 58 2 1 1 1 0 8 1 pppxif 1504 8 0 8 3 2 1 1 0 8 1 pffrag 232 53 0 42 1 0 1 1 0 482 0 pffrnode 88 52 0 42 1 0 1 1 0 8 0 pffrent 40 100 0 89 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 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfstitem 24 97 0 26 1 0 1 1 0 8 0 pfstkey 128 97 0 26 3 0 3 3 0 8 0 pfstate 448 97 0 26 8 0 8 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1001 0 648 31 3 28 30 0 8 2 art_table 40 1004 0 648 5 0 5 5 0 8 0 art_node 32 211 0 131 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 12 2 1 1 1 0 8 0 semapl 112 40 0 30 1 0 1 1 0 8 0 shmpl 112 40 0 3 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 4297 0 2782 96 0 96 96 0 8 0 ffsino 296 4297 0 2782 118 0 118 118 0 8 0 nchpl 144 6420 0 5844 64 41 23 64 0 8 0 rtmask 32 15 0 15 3 2 1 1 0 8 1 vnodes 216 5223 0 0 291 0 291 291 0 8 0 namei 1024 22907 0 22906 3 1 2 2 0 8 1 percpumem 16 121 0 72 1 0 1 1 0 8 0 vcpupl 3968 4 0 0 1 0 1 1 0 8 0 vmpool 848 4 0 0 1 0 1 1 0 8 0 kstatmem 264 108 0 84 5 2 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 2 1 1 1 0 8 1 scxspl 216 45096 0 45096 11 10 1 8 1 8 1 plimitpl 152 373 0 353 1 0 1 1 0 8 0 sigapl 424 1869 0 1800 9 1 8 8 0 8 0 knotepl 120 725 0 0 22 0 22 22 0 8 0 kqueuepl 224 696 0 679 7 5 2 5 0 8 1 pipepl 344 305 0 277 9 6 3 9 0 8 0 fdescpl 528 1828 0 1796 3 0 3 3 0 8 0 filepl 160 12803 0 12553 25 9 16 19 0 8 4 lockfpl 104 909 0 905 3 2 1 2 0 8 0 lockfspl 48 196 0 193 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 69 0 52 1 0 1 1 0 8 0 ucredpl 104 2160 0 2145 1 0 1 1 0 8 0 zombiepl 144 1801 0 1800 2 1 1 1 0 8 0 processpl 1232 1869 0 1800 7 1 6 6 0 8 0 procpl 664 4050 0 3963 8 0 8 8 0 8 0 sosppl 176 13 0 13 3 2 1 1 0 8 1 sockpl 752 3139 0 3095 37 25 12 24 0 8 7 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 34 0 0 4 0 4 4 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 284 0 0 18 0 18 18 0 8 0 bufpl 280 18335 0 12199 439 0 439 439 0 8 0 anonpl 32 14001 0 0 114 1 113 113 0 246 0 amapchunkpl 152 52702 0 52010 33 6 27 30 0 158 0 amappl16 200 6125 0 5886 59 35 24 36 0 8 2 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 9 0 9 2 2 0 1 0 8 0 amappl13 176 512 0 511 1 0 1 1 0 8 0 amappl12 168 2240 0 2197 3 0 3 3 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 57 0 42 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 97 0 96 1 0 1 1 0 8 0 amappl6 120 339 0 326 1 0 1 1 0 8 0 amappl5 112 75 0 64 1 0 1 1 0 8 0 amappl4 104 468 0 437 1 0 1 1 0 8 0 amappl3 96 10513 0 10391 5 1 4 4 0 8 0 amappl2 88 637 0 574 2 0 2 2 0 8 0 amappl1 80 16222 0 15626 16 2 14 14 0 8 0 amappl 88 14531 0 14337 5 0 5 5 0 92 0 uvmvnodes 80 154 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 1 1 0 1 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 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 9 0 9 4 4 0 1 0 8 0 dma128 128 256 0 256 2 1 1 1 0 8 1 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 46 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1829 0 1797 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1829 0 1797 1 0 1 1 0 8 0 vmmpekpl 168 15486 0 15435 3 0 3 3 0 8 0 vmmpepl 168 120779 0 118564 120 14 106 115 0 357 1 vmsppl 488 1828 0 1797 6 1 5 5 0 8 0 rwobjpl 80 33513 0 32143 37 4 33 36 0 8 0 pdppl 4096 3673 0 3598 123 46 77 83 0 8 2 pvpl 32 22803 0 0 184 0 184 184 0 265 0 pmappl 256 1832 0 1797 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 333 0 65 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffffffff8386ce30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffffffff8386ce20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffffffff8386c2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 ast(ffff80003c46d5d0) at ast+0x15a mi_ast sys/sys/syscall_mi.h:252 [inline] ast(ffff80003c46d5d0) at ast+0x15a sys/arch/amd64/amd64/trap.c:739 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x783a0ac39d20, count: -7 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5