panic: bad dir Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *364962 80050 0 0 0 0K dhcpleased db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8248011c) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd807ae00498,ffff8000211dcd18,ffff8000211dcd48) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dcce8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dcce8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dcce8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffdae10,0,0,ffff8000211dced0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dcf40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dcf40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae00, count: 5 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: bad dir ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8248011c) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd807ae00498,ffff8000211dcd18,ffff8000211dcd48) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dcce8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dcce8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dcce8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffdae10,0,0,ffff8000211dced0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dcf40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dcf40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae00, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211dc7a0 rbx 0xffffffff82811bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff800021193ce8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc71d025bf1a67940 r11 0xa7ec1ea273850c3e r12 0xffffffff82811a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff819c3118 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211dc790 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhcpleased) pid=364962 stat=onproc flags process=0 proc=0 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021192008,0xffff8000ffff7a60 process=0xffff8000ffff8430 user=0xffff8000211d7000, vmspace=0xfffffd807f000170 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29947 282215 97377 0 2 0 syz-executor.1 29947 125976 97377 0 3 0x4000080 fsleep syz-executor.1 29947 78613 97377 0 3 0x4000080 fsleep syz-executor.1 69765 287136 12009 0 2 0 syz-executor.2 69765 132361 12009 0 2 0x4000000 syz-executor.2 37540 476320 30611 0 2 0 syz-executor.0 37540 478547 30611 0 3 0x4000080 fsleep syz-executor.0 76872 423765 35349 0 3 0x80 nanoslp syz-executor.3 76872 172611 35349 0 3 0x4000080 fsleep syz-executor.3 76872 229139 35349 0 3 0x4000080 netcon syz-executor.3 76872 88740 35349 0 3 0x4000080 fsleep syz-executor.3 30611 386665 41744 0 3 0x82 nanoslp syz-executor.0 12009 408808 41744 0 3 0x82 nanoslp syz-executor.2 97377 227 41744 0 3 0x82 nanoslp syz-executor.1 48581 104300 1 0 3 0x100083 ttyin getty 35349 460527 41744 0 3 0x82 nanoslp syz-executor.3 54477 82522 0 0 3 0x14280 nfsidl nfsio 34247 382836 0 0 3 0x14280 nfsidl nfsio 38518 398932 0 0 3 0x14280 nfsidl nfsio 19876 282575 0 0 3 0x14280 nfsidl nfsio 7553 100799 0 0 3 0x14280 nfsidl nfsio 98807 118079 0 0 3 0x14280 nfsidl nfsio 46857 318766 0 0 3 0x14280 nfsidl nfsio 79884 87652 0 0 3 0x14280 nfsidl nfsio 18420 8157 0 0 3 0x14280 nfsidl nfsio 44230 272160 0 0 3 0x14280 nfsidl nfsio 72128 255679 0 0 3 0x14280 nfsidl nfsio 91889 524170 0 0 3 0x14280 nfsidl nfsio 60357 165497 0 0 3 0x14280 nfsidl nfsio 51426 515524 0 0 3 0x14280 nfsidl nfsio 13261 422526 0 0 3 0x14280 nfsidl nfsio 75964 491833 0 0 3 0x14280 nfsidl nfsio 17546 26848 0 0 3 0x14280 nfsidl nfsio 73343 78175 0 0 3 0x14280 nfsidl nfsio 92197 476050 0 0 3 0x14280 nfsidl nfsio 35286 460911 0 0 3 0x14280 nfsidl nfsio 71620 445400 0 0 3 0x14200 bored sosplice 41744 345686 95987 0 3 0x82 thrsleep syz-fuzzer 41744 60192 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 467512 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 500986 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 320009 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 418275 95987 0 3 0x4000082 kqread syz-fuzzer 41744 331260 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 489797 95987 0 3 0x4000082 thrsleep syz-fuzzer 41744 207160 95987 0 3 0x4000082 thrsleep syz-fuzzer 95987 263539 54679 0 3 0x10008a sigsusp ksh 54679 364584 85418 0 3 0x9a poll sshd 85418 149011 1 0 3 0x88 poll sshd 17024 299092 62888 74 3 0x100092 bpf pflogd 62888 423918 1 0 3 0x80 netio pflogd 5567 441130 40515 73 3 0x100090 kqread syslogd 40515 405096 1 0 3 0x100082 netio syslogd 66316 351776 1 0 3 0x100080 kqread resolvd 51522 140360 80050 77 3 0x100092 kqread dhcpleased 36969 330618 80050 77 3 0x100092 kqread dhcpleased *80050 364962 1 0 7 0 dhcpleased 35425 335410 0 0 3 0x14200 bored smr 35566 462957 0 0 2 0x14200 zerothread 26291 12098 0 0 3 0x14200 aiodoned aiodoned 8258 81277 0 0 3 0x14200 syncer update 63644 462999 0 0 3 0x14200 cleaner cleaner 46602 335024 0 0 3 0x14200 reaper reaper 28074 4095 0 0 3 0x14200 pgdaemon pagedaemon 93048 82888 0 0 3 0x14200 bored viomb 62835 75922 0 0 3 0x40014200 acpi0 acpi0 38541 28830 0 0 7 0x40014200 idle1 26491 379656 0 0 3 0x14200 bored softnet 51165 316898 0 0 3 0x14200 bored systqmp 37071 302277 0 0 3 0x14200 bored systq 1537 105568 0 0 3 0x40014200 bored softclock 1771 194414 0 0 3 0x40014200 idle0 1 197188 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80050 (dhcpleased) thread 0xffff800021193ce8 (364962) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828e6fa8) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 tsleep+0x12c sys/kern/kern_synch.c:158 #5 biowait+0x91 sys/kern/vfs_bio.c:1271 #6 ffs_bufatoff+0x125 sys/ufs/ffs/ffs_subr.c:71 #7 ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:258 #8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #10 namei+0x36a sys/kern/vfs_lookup.c:245 #11 vn_open+0x105 sys/kern/vfs_vnops.c:146 #12 doopenat+0x26a sys/kern/vfs_syscalls.c:1128 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f10e5f0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 cache_lookup+0x2b4 sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1ac sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #10 namei+0x36a sys/kern/vfs_lookup.c:245 #11 vn_open+0x105 sys/kern/vfs_vnops.c:146 #12 doopenat+0x26a sys/kern/vfs_syscalls.c:1128 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10219 6588K 8103K 78643K 121270 0 pcb 14 24K 28K 78643K 10475 0 rtable 249 41K 44K 78643K 17475 0 ifaddr 129 41K 43K 78643K 5717 0 sysctl 3 1K 3K 78643K 14 0 counters 50 34K 35K 78643K 1470 0 ioctlops 0 0K 8K 78643K 11640 0 iov 0 0K 28K 78643K 5147 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1729 109K 109K 78643K 35476 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 443 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 10825 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 45K 78643K 50038 0 sigio 0 0K 0K 78643K 509 0 proc 74 87K 111K 78643K 9735 0 subproc 52 3K 7K 78643K 3650 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4217 0 in_multi 42 2K 4K 78643K 5462 0 ether_multi 1 0K 0K 78643K 798 0 mrt 2 0K 0K 78643K 279 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 271 1208K 1208K 78643K 271 0 exec 0 0K 2K 78643K 13139 0 pfkey data 0 0K 0K 78643K 57 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 755 1882K 1897K 78643K 596911 0 UVM aobj 130 4K 4K 78643K 141 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 3820 0 NDP 10 0K 1K 78643K 1397 0 temp 143 4268K 8358K 78643K 360547 0 kqueue 10 14K 26K 78643K 1869 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 3091 0 3088 38 37 1 3 0 8 0 rtentry 112 4040 0 3989 2 0 2 2 0 8 0 unpcb 136 145109 0 145090 645 636 9 12 0 8 8 syncache 296 207 0 207 60 60 0 1 0 8 0 tcpqe 32 350 220 350 12 12 0 1 0 8 0 tcpcb 736 20677 0 20671 667 665 2 27 0 8 1 arp 120 644 0 634 1 0 1 1 0 8 0 inpcb 304 66697 0 66686 754 750 4 16 0 8 3 rttmr 72 92 0 92 29 29 0 1 0 8 0 ip6q 72 9 0 9 2 2 0 1 0 8 0 ip6af 40 27 0 27 2 2 0 1 0 8 0 nd6 48 1013 0 1004 1 0 1 1 0 8 0 pkpcb 40 399 0 399 30 30 0 1 0 8 0 kcovpl 48 274 0 270 1 0 1 1 0 8 0 ppxss 1248 226 0 226 43 43 0 1 0 8 0 pfstscr 40 344 0 344 29 29 0 1 0 8 0 pffrag 232 365 0 363 27 26 1 1 0 482 0 pffrnode 88 365 0 363 27 26 1 1 0 8 0 pffrent 40 3914 0 3912 36 35 1 1 0 8 0 pfosfp 40 1450 0 1447 6 5 1 5 0 8 0 pfosfpen 112 1450 0 1443 22 21 1 21 0 8 0 pfrke_plain 168 10 0 9 5 4 1 1 0 8 0 pfrktable 1344 2657 0 2602 18 13 5 6 0 8 0 pfpktdelay 88 1581 0 1581 3 3 0 2 0 8 0 pftag 88 81 0 70 8 7 1 1 0 8 0 pfqueue 264 87 0 87 6 6 0 1 0 8 0 pfstitem 24 800 0 798 3 2 1 3 0 8 0 pfstkey 112 1415 0 1413 13 12 1 13 0 8 0 pfstate 320 720 0 718 19 18 1 19 0 8 0 pfsrctr 152 12 0 12 1 1 0 1 0 8 0 pfrule 1360 5163 0 4692 46 6 40 40 0 8 0 art_heap8 4096 5 0 4 5 4 1 3 0 8 0 art_heap4 256 17944 0 17739 95 82 13 20 0 8 0 art_table 32 17949 0 17743 5 2 3 3 0 8 0 art_node 16 4032 0 3989 1 0 1 1 0 8 0 sysvmsgpl 40 33 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 10823 0 10813 1 0 1 1 0 8 0 shmpl 112 138 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 64151 0 62648 95 0 95 95 0 8 0 ffsino 272 64151 0 62648 101 0 101 101 0 8 0 nchpl 144 127527 0 125937 61 0 61 61 0 8 0 rtmask 32 20 0 19 5 4 1 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 466138 0 466137 14 13 1 1 0 8 0 percpumem 16 747 0 710 1 0 1 1 0 8 0 vcpupl 2048 309 0 0 39 0 39 39 0 8 0 vmpool 560 512 0 203 26 3 23 23 0 8 0 pfiaddrpl 120 1053 0 895 7 2 5 5 0 8 0 scsiplug 72 46 0 46 14 14 0 1 0 8 0 scxspl 216 408707 0 408707 38 37 1 8 0 8 1 plimitpl 152 5715 0 5704 1 0 1 1 0 8 0 sigapl 424 49528 0 49470 9 2 7 7 0 8 0 futexpl 64 507270 0 507265 12 11 1 1 0 8 0 knotepl 112 284 0 0 4 0 4 4 0 8 0 kqueuepl 216 9749 0 9740 222 221 1 8 0 8 0 pipepl 336 10592 0 10576 300 298 2 12 0 8 0 fdescpl 496 49462 0 49439 9 6 3 4 0 8 0 filepl 152 450683 0 450520 777 763 14 21 0 8 7 lockfpl 104 16935 0 16933 37 36 1 4 0 8 0 lockfspl 48 4634 0 4632 2 1 1 2 0 8 0 sessionpl 144 300 0 287 1 0 1 1 0 8 0 pgrppl 48 621 0 608 1 0 1 1 0 8 0 ucredpl 96 40441 0 40421 1 0 1 1 0 8 0 zombiepl 144 49470 0 49470 8 7 1 1 0 8 1 processpl 1064 49528 0 49470 5 1 4 4 0 8 0 procpl 672 124551 0 124478 26 19 7 8 0 8 0 srpgc 96 412 0 412 69 69 0 1 0 8 0 sosppl 168 464 0 464 81 81 0 1 0 8 0 sockpl 480 215420 0 215387 4660 4647 13 52 0 8 8 mcl64k 65536 26 0 0 3 0 3 3 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 546 0 0 27 6 21 27 0 8 0 mtagpl 96 2582 0 0 14 2 12 13 0 8 1 mbufpl 256 9996 0 0 556 0 556 556 0 8 0 bufpl 288 84394 0 78190 454 7 447 454 0 8 0 anonpl 24 14095320 0 14065691 719 531 188 225 0 186 0 amapchunkpl 152 1496865 0 1495993 323 287 36 47 0 158 0 amappl16 200 158527 0 156937 610 521 89 105 0 8 0 amappl15 192 12119 0 12116 1 0 1 1 0 8 0 amappl14 184 10649 0 10647 1 0 1 1 0 8 0 amappl13 176 6555 0 6554 1 0 1 1 0 8 0 amappl12 168 6468 0 6462 1 0 1 1 0 8 0 amappl11 160 4095 0 4081 1 0 1 1 0 8 0 amappl10 152 3743 0 3729 1 0 1 1 0 8 0 amappl9 144 7484 0 7478 1 0 1 1 0 8 0 amappl8 136 8927 0 8741 8 1 7 7 0 8 0 amappl7 128 4520 0 4509 1 0 1 1 0 8 0 amappl6 120 8847 0 8822 1 0 1 1 0 8 0 amappl5 112 38140 0 38113 1 0 1 1 0 8 0 amappl4 104 17901 0 17873 1 0 1 1 0 8 0 amappl3 96 12638 0 12622 1 0 1 1 0 8 0 amappl2 88 12346 0 12294 4 2 2 2 0 8 0 amappl1 80 877549 0 877022 15 4 11 13 0 8 0 amappl 88 591266 0 590901 10 1 9 9 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 72 140 0 11 3 0 3 3 0 8 0 uaddrrnd 24 49974 0 49642 4 1 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 49974 0 49642 4 1 3 3 0 8 0 vmmpekpl 168 307759 0 307688 6 2 4 4 0 8 0 vmmpepl 168 4676834 0 4672913 1898 1690 208 228 0 357 18 vmsppl 368 49973 0 49642 35 4 31 31 0 8 0 rwobjpl 56 1071675 0 1062864 254 128 126 130 0 8 0 pdppl 4096 99956 0 99593 616 253 363 365 0 8 0 pvpl 32 23849121 0 23824593 546 306 240 268 0 265 0 pmappl 248 49973 0 49642 22 1 21 21 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 3065 0 1340 52 2 50 50 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8248011c) at panic+0x177 sys/kern/subr_prf.c:202 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd807ae00498,ffff8000211dcd18,ffff8000211dcd48) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dcce8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dcce8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dcce8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021193ce8,ffffff9c,7f7ffffdae10,0,0,ffff8000211dced0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dcf40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dcf40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdae00, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5