panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *163588 93228 0 0x2 0 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8332a832) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd806b950490,ffff80002a2f8298) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806b950490,ffff80002a2f8298) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a456488) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b950490,ffff80002a2f8298) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd806b950490) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806023c638,fffffd806b950490,ffff80002a456608) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a2f8298,ffffff9c,72bea00b8530,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a456780) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a456780) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72bea00b89e0, count: 4 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: missing alias ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8332a832) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd806b950490,ffff80002a2f8298) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806b950490,ffff80002a2f8298) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a456488) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b950490,ffff80002a2f8298) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd806b950490) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806023c638,fffffd806b950490,ffff80002a456608) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a2f8298,ffffff9c,72bea00b8530,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a456780) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a456780) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72bea00b89e0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a4562c0 rbx 0xffffffff837f6dc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff80002a2f8298 rax 0xffffffff837f5ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x140a7c608cc1e918 r11 0x8bd800270e875e5d r12 0xffffffff837f6bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff83263d85 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a4562b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=163588 pid=93228 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a390ce8,0xffff80002a2f9208 process=0xffff8000ffffae08 user=0xffff80002a451000, vmspace=0xfffffd807eb8dab0 estcpu=36, cpticks=0, pctcpu=0.2, user=3, sys=175, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12368 52482 63783 0 3 0 futex syz-executor 12368 467961 63783 0 3 0x4000080 fsleep syz-executor 30385 500345 75154 0 3 0 futex syz-executor 30385 63681 75154 0 3 0x4000080 fsleep syz-executor 37126 178602 49237 0 2 0 syz-executor 37126 389187 49237 0 3 0x4000080 lockf syz-executor 94290 389399 5394 0 2 0x10 syz-executor 94290 185091 5394 0 3 0x4000090 fsleep syz-executor 46242 362321 58298 0 3 0 futex syz-executor 46242 283481 58298 0 3 0x4000080 fsleep syz-executor 85672 133427 98249 0 2 0 syz-executor 85672 161441 98249 0 2 0x4000000 syz-executor 85672 464197 98249 0 3 0x4000080 fsleep syz-executor 91173 507954 0 0 3 0x14200 acct acct 63783 42731 81194 0 3 0x82 nanoslp syz-executor 97432 382546 81194 0 2 0x2 syz-executor 58298 241470 81194 0 3 0x82 nanoslp syz-executor 10242 71626 1 0 3 0x100083 ttyin getty 75154 224965 81194 0 3 0x82 nanoslp syz-executor 98249 42867 81194 0 3 0x82 nanoslp syz-executor 17478 92026 0 0 3 0x14200 bored sosplice 5394 137998 81194 0 3 0x82 nanoslp syz-executor *93228 163588 81194 0 7 0x2 syz-executor 49237 379851 81194 0 3 0x82 nanoslp syz-executor 81194 262200 1492 0 3 0x82 kqread syz-executor 1492 226357 52282 0 3 0x10008a sigsusp ksh 52282 77556 98196 0 3 0x98 kqread sshd-session 98196 180212 67416 0 3 0x92 kqread sshd-session 67416 226176 1 0 3 0x88 kqread sshd 40933 273177 81925 74 3 0x1100092 bpf pflogd 81925 198767 1 0 3 0x80 sbwait pflogd 65285 436321 98656 73 3 0x1100090 kqread syslogd 98656 489148 1 0 3 0x100082 sbwait syslogd 37992 30113 1 0 3 0x100080 kqread resolvd 40210 453463 38131 77 3 0x100092 kqread dhcpleased 56022 281321 38131 77 3 0x100092 kqread dhcpleased 38131 411602 1 0 3 0x80 kqread dhcpleased 55943 286857 0 0 3 0x14200 bored smr 18102 261650 0 0 2 0x14200 zerothread 85798 88860 0 0 3 0x14200 aiodoned aiodoned 64287 402898 0 0 3 0x14200 syncer update 50424 496290 0 0 3 0x14200 cleaner cleaner 38264 296061 0 0 3 0x14200 reaper reaper 63212 229519 0 0 3 0x14200 pgdaemon pagedaemon 56216 306566 0 0 3 0x14200 bored viomb 18395 436502 0 0 3 0x40014200 acpi0 acpi0 59305 460503 0 0 7 0x40014200 idle1 51871 183681 0 0 3 0x14200 bored softnet3 35453 195639 0 0 3 0x14200 bored softnet2 51852 211189 0 0 3 0x14200 bored softnet1 70192 379504 0 0 3 0x14200 bored softnet0 13741 402429 0 0 3 0x14200 bored systqmp 29606 189526 0 0 3 0x14200 bored systq 99141 143336 0 0 3 0x14200 tmoslp softclockmp 78115 413071 0 0 3 0x40014200 tmoslp softclock 50740 237965 0 0 3 0x40014200 idle0 1 498046 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 85672 (syz-executor) thread 0xffff8000ffff6540 (161441) exclusive rwlock futex r = 0 (0xffffffff83802e28) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sys_futex+0x69 sys/kern/sys_futex.c:98 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 93228 (syz-executor) thread 0xffff80002a2f8298 (163588) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83944c70) #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 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:412 #4 biowait+0xc1 sys/kern/vfs_bio.c:1246 #5 bwrite+0x2e5 sys/kern/vfs_bio.c:758 #6 ufs_dirremove+0x2ac sys/ufs/ufs/ufs_lookup.c:919 #7 ufs_remove+0x1a7 sys/ufs/ufs/ufs_vnops.c:594 #8 VOP_REMOVE+0x176 sys/kern/vfs_vops.c:331 #9 dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806be5b0a8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #12 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11104K 11480K 166960K 13729 0 pcb 17 16K 18K 166960K 437 0 rtable 164 11K 12K 166960K 875 0 pf 32 17K 20K 166960K 175 0 ifaddr 29 4K 8K 166960K 134 0 ifgroup 47 2K 2K 166960K 231 0 sysctl 4 1K 1K 166960K 8 0 counters 60 35K 37K 166960K 216 0 ioctlops 0 0K 4K 166960K 1691 0 iov 0 0K 16K 166960K 139 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1527 96K 97K 166960K 2967 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 16 32K 32K 166960K 53 0 dirhash 12 2K 3K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 1607 0 sigio 0 0K 0K 166960K 16 0 proc 74 91K 140K 166960K 929 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 164 0 in_multi 55 4K 7K 166960K 229 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 805 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 229 159K 174K 166960K 16374 0 UVM aobj 38 4K 6K 166960K 45 0 pinsyscall 41 82K 105K 166960K 2878 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 89 0 NDP 10 0K 2K 166960K 92 0 temp 77 8692K 8778K 166960K 62842 0 kqueue 13 20K 28K 166960K 271 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 169 0 166 2 1 1 2 0 8 0 rtentry 168 263 0 204 5 0 5 5 0 8 0 unpcb 144 1012 0 993 11 8 3 4 0 8 2 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 459 0 455 14 12 2 7 0 8 1 arp 120 35 0 24 1 0 1 1 0 8 0 inpcb 376 1714 0 1705 24 16 8 11 0 8 6 nd6 136 47 0 35 1 0 1 1 0 8 0 pkpcb 40 15 0 14 4 3 1 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1168 48 0 48 4 3 1 2 0 8 1 pppxif 1480 9 0 9 5 5 0 1 0 8 0 pffrag 232 8 0 3 1 0 1 1 0 482 0 pffrnode 88 8 0 3 1 0 1 1 0 8 0 pffrent 40 76 0 71 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 6 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 21 0 19 1 0 1 1 0 8 0 pfstkey 128 21 0 19 1 0 1 1 0 8 0 pfstate 376 20 0 18 2 1 1 2 0 8 0 pfrule 1344 24 0 17 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 911 0 639 33 10 23 30 0 8 1 art_table 32 915 0 639 4 0 4 4 0 8 0 art_node 16 215 0 163 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 46 0 32 1 0 1 1 0 8 0 shmpl 112 42 0 7 2 0 2 2 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 4202 0 2685 97 1 96 96 0 8 0 ffsino 280 4202 0 2685 110 0 110 110 0 8 0 nchpl 144 6478 0 5870 64 39 25 64 0 8 0 rtmask 32 12 0 12 4 4 0 1 0 8 0 uvmvnodes 80 5375 0 0 110 0 110 110 0 8 0 vnodes 216 5375 0 0 299 0 299 299 0 8 0 namei 1024 22781 0 22781 2 1 1 1 0 8 1 percpumem 16 122 0 78 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 104 4 2 2 3 0 8 0 scsiplug 72 5 0 5 3 3 0 1 0 8 0 scxspl 216 20921 0 20921 12 11 1 8 1 8 1 plimitpl 152 349 0 331 1 0 1 1 0 8 0 sigapl 424 1898 0 1848 7 1 6 7 0 8 0 futexpl 64 21577 0 21571 1 0 1 1 0 8 0 knotepl 120 360 0 0 10 0 10 10 0 8 0 kqueuepl 216 460 0 449 1 0 1 1 0 8 0 pipepl 328 222 0 195 3 0 3 3 0 8 0 fdescpl 504 1876 0 1846 5 0 5 5 0 8 0 filepl 152 11874 0 11651 27 14 13 17 0 8 0 lockfpl 104 764 0 758 3 2 1 2 0 8 0 lockfspl 48 197 0 192 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 1995 0 1979 1 0 1 1 0 8 0 zombiepl 144 2193 0 2193 1 0 1 1 0 8 1 processpl 1176 1898 0 1848 5 0 5 5 0 8 0 procpl 656 4244 0 4187 7 0 7 7 0 8 0 srpgc 96 20 0 20 5 4 1 1 0 8 1 sosppl 168 9 0 9 2 2 0 1 0 8 0 sockpl 688 2961 0 2929 34 21 13 18 0 8 9 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 105 0 0 3 0 3 3 0 8 0 mbufpl 256 429 0 0 25 0 25 25 0 8 0 bufpl 280 7209 0 1055 440 0 440 440 0 8 0 anonpl 24 248846 0 245427 77 22 55 60 0 184 17 amapchunkpl 152 52613 0 52158 44 18 26 28 0 158 4 amappl16 200 4804 0 4770 38 30 8 17 0 8 3 amappl15 192 39 0 39 1 1 0 1 0 8 0 amappl14 184 131 0 119 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2627 0 2597 3 1 2 2 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 123 0 111 1 0 1 1 0 8 0 amappl6 120 274 0 270 1 0 1 1 0 8 0 amappl5 112 152 0 142 1 0 1 1 0 8 0 amappl4 104 379 0 357 1 0 1 1 0 8 0 amappl3 96 10999 0 10895 5 1 4 4 0 8 0 amappl2 88 743 0 680 2 0 2 2 0 8 0 amappl1 80 14551 0 13951 15 2 13 15 0 8 0 amappl 88 15272 0 15116 5 0 5 5 0 92 0 dma16384 16384 1 0 1 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 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 44 0 7 1 0 1 1 0 8 0 uaddrrnd 24 1876 0 1846 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1876 0 1846 1 0 1 1 0 8 0 vmmpekpl 168 14750 0 14697 3 0 3 3 0 8 0 vmmpepl 168 119854 0 117913 119 22 97 103 0 357 2 vmsppl 456 1875 0 1846 6 1 5 5 0 8 0 rwobjpl 64 36670 0 30329 105 1 104 104 0 8 0 pdppl 4096 3760 0 3692 116 44 72 88 0 8 4 pvpl 32 18704 0 0 151 0 151 151 0 265 0 pmappl 248 1875 0 1846 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 82 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 panic(ffffffff8332a832) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd806b950490,ffff80002a2f8298) at vgonel+0x681 sys/kern/vfs_subr.c:1218 vrecycle(fffffd806b950490,ffff80002a2f8298) at vrecycle+0x7c sys/kern/vfs_subr.c:1144 ufs_inactive(ffff80002a456488) at ufs_inactive+0x360 sys/ufs/ufs/ufs_inode.c:107 VOP_INACTIVE(fffffd806b950490,ffff80002a2f8298) at VOP_INACTIVE+0x107 sys/kern/vfs_vops.c:495 vput(fffffd806b950490) at vput+0xe5 sys/kern/vfs_subr.c:797 VOP_REMOVE(fffffd806023c638,fffffd806b950490,ffff80002a456608) at VOP_REMOVE+0x19d sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a2f8298,ffffff9c,72bea00b8530,0) at dounlinkat+0x177 sys/kern/vfs_syscalls.c:1902 syscall(ffff80002a456780) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a456780) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72bea00b89e0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5