panic: bad dir Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *409598 69100 0 0 0 0K dhcpleased db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824804dc) 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(fffffd806efa53b8,ffff8000211dc128,ffff8000211dc158) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc0f8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc0f8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc0f8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff8000211937a8,ffffff9c,7f7ffffd3240,0,0,ffff8000211dc2e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc350) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc350) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3230, 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(ffffffff824804dc) 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(fffffd806efa53b8,ffff8000211dc128,ffff8000211dc158) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc0f8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc0f8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc0f8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff8000211937a8,ffffff9c,7f7ffffd3240,0,0,ffff8000211dc2e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc350) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc350) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3230, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211dbbb0 rbx 0xffffffff82801bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff8000211937a8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5bb2406945acb31e r11 0x9aeb5637889790ca r12 0xffffffff82801a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81930978 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211dbba0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (dhcpleased) pid=409598 stat=onproc flags process=0 proc=0 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000211927e8,0xffff8000ffff7d00 process=0xffff8000ffff8858 user=0xffff8000211d7000, vmspace=0xfffffd807f000170 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93627 72784 45738 0 2 0 syz-executor.1 93627 271739 45738 0 3 0x4000080 fsleep syz-executor.1 86738 130662 61167 0 2 0 syz-executor.2 86738 168157 61167 0 2 0x4000000 syz-executor.2 43411 44376 86134 0 2 0 syz-executor.0 43411 376625 86134 0 3 0x4000080 fsleep syz-executor.0 45738 321444 81113 0 2 0x482 syz-executor.1 86134 314739 81113 0 2 0x482 syz-executor.0 61167 60533 81113 0 2 0x482 syz-executor.2 41499 122352 81113 0 2 0x2 syz-executor.3 55237 293121 1 0 3 0x100083 ttyin getty 2897 125419 0 0 3 0x14200 acct acct 53021 124887 0 0 3 0x14200 bored sosplice 81113 117382 8830 0 3 0x82 thrsleep syz-fuzzer 81113 383746 8830 0 3 0x4000082 nanoslp syz-fuzzer 81113 322312 8830 0 3 0x4000082 thrsleep syz-fuzzer 81113 316021 8830 0 3 0x4000082 thrsleep syz-fuzzer 81113 199966 8830 0 3 0x4000082 kqread syz-fuzzer 81113 79385 8830 0 3 0x4000082 thrsleep syz-fuzzer 81113 5443 8830 0 3 0x4000082 nanoslp syz-fuzzer 81113 91878 8830 0 3 0x4000082 thrsleep syz-fuzzer 8830 247357 18898 0 3 0x10008a sigsusp ksh 18898 61143 98448 0 3 0x9a poll sshd 98448 417279 1 0 3 0x88 poll sshd 38154 62847 16671 74 3 0x100092 bpf pflogd 16671 390577 1 0 3 0x80 netio pflogd 37345 134288 4423 73 3 0x100090 kqread syslogd 4423 314186 1 0 3 0x100082 netio syslogd 63685 11381 1 0 3 0x100080 kqread resolvd 34857 352294 69100 77 3 0x100092 kqread dhcpleased 60262 258388 69100 77 3 0x100092 kqread dhcpleased *69100 409598 1 0 7 0 dhcpleased 73781 431520 0 0 3 0x14200 bored smr 58478 195788 0 0 2 0x14200 zerothread 47908 323007 0 0 3 0x14200 aiodoned aiodoned 93380 164167 0 0 3 0x14200 syncer update 56877 65000 0 0 3 0x14200 cleaner cleaner 22369 13075 0 0 3 0x14200 reaper reaper 50168 51007 0 0 3 0x14200 pgdaemon pagedaemon 45620 327062 0 0 3 0x14200 bored viomb 97799 384992 0 0 3 0x40014200 acpi0 acpi0 67735 76427 0 0 7 0x40014200 idle1 65475 433560 0 0 3 0x14200 bored softnet 83967 154400 0 0 3 0x14200 bored systqmp 11662 57165 0 0 3 0x14200 bored systq 73663 202339 0 0 3 0x40014200 bored softclock 24090 92126 0 0 3 0x40014200 idle0 1 430913 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 41499 (syz-executor.3) thread 0xffff8000246ada48 (122352) exclusive rrwlock inode r = 0 (0xfffffd80629a43c8) #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 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80612746f8) #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 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 69100 (dhcpleased) thread 0xffff8000211937a8 (409598) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8299b5d0) #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 (0xfffffd806f0f32c0) #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 10218 6502K 8276K 78643K 161289 0 pcb 13 24K 28K 78643K 6801 0 rtable 189 25K 25K 78643K 8357 0 ifaddr 88 30K 37K 78643K 4613 0 sysctl 3 1K 3K 78643K 6 0 counters 50 34K 35K 78643K 1144 0 ioctlops 0 0K 4K 78643K 10695 0 iov 0 0K 24K 78643K 4358 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1683 106K 106K 78643K 45190 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 331 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 6549 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 49K 78643K 37987 0 sigio 0 0K 0K 78643K 646 0 proc 73 87K 111K 78643K 6071 0 subproc 52 6K 8K 78643K 2083 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2855 0 in_multi 52 3K 4K 78643K 3516 0 ether_multi 1 0K 0K 78643K 523 0 mrt 1 0K 0K 78643K 142 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 8053 0 pfkey data 0 0K 0K 78643K 8 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 809 2374K 2389K 78643K 460496 0 UVM aobj 131 4K 4K 78643K 139 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2653 0 NDP 11 0K 1K 78643K 970 0 temp 128 4236K 8332K 78643K 357467 0 kqueue 12 16K 28K 78643K 1665 0 SYN cache 2 0K 16K 78643K 4 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 2958 0 2955 44 43 1 3 0 8 0 rtentry 112 2729 0 2673 2 0 2 2 0 8 0 unpcb 136 49374 0 49359 400 394 6 9 0 8 5 syncache 296 136 0 136 40 40 0 1 0 8 0 tcpqe 32 499 1071 499 2 2 0 1 0 8 0 tcpcb 736 16294 0 16285 483 479 4 21 0 8 3 arp 120 438 0 428 1 0 1 1 0 8 0 inpcb 304 51413 0 51405 519 513 6 22 0 8 5 rttmr 72 30 0 30 9 9 0 1 0 8 0 ip6q 72 13 0 13 3 3 0 1 0 8 0 ip6af 40 39 0 39 3 3 0 1 0 8 0 nd6 48 636 0 624 1 0 1 1 0 8 0 pkpcb 40 379 0 379 25 25 0 2 0 8 0 kcovpl 48 159 0 155 1 0 1 1 0 8 0 ppxss 1248 180 0 180 33 33 0 1 0 8 0 pfstscr 40 325 0 325 24 23 1 1 0 8 1 pffrag 232 138 0 138 26 26 0 1 0 482 0 pffrnode 88 138 0 138 26 26 0 1 0 8 0 pffrent 40 2377 0 2377 34 34 0 1 0 8 0 pfosfp 40 1434 0 1433 6 5 1 5 0 8 0 pfosfpen 112 1434 0 1431 22 21 1 21 0 8 0 pfrke_plain 168 5 0 5 3 3 0 1 0 8 0 pfrktable 1344 162 0 139 16 14 2 3 0 8 0 pftag 88 68 0 51 2 1 1 1 0 8 0 pfqueue 264 1297 0 791 35 1 34 34 0 8 0 pfstitem 24 62 0 60 1 0 1 1 0 8 0 pfstkey 112 905 0 903 2 1 1 2 0 8 0 pfstate 320 487 0 485 4 3 1 4 0 8 0 pfrule 1360 2207 0 1995 29 11 18 18 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 10880 0 10633 67 50 17 19 0 8 0 art_table 32 10881 0 10633 5 2 3 3 0 8 0 art_node 16 2682 0 2635 1 0 1 1 0 8 0 sysvmsgpl 40 127 0 115 3 2 1 1 0 8 0 semapl 112 6547 0 6537 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 51855 0 50324 97 0 97 97 0 8 0 ffsino 272 51855 0 50324 103 0 103 103 0 8 0 nchpl 144 100605 0 99011 61 0 61 61 0 8 0 rtmask 32 10 0 10 3 3 0 1 0 8 0 uvmvnodes 80 6403 0 0 131 0 131 131 0 8 0 vnodes 224 6403 0 0 377 0 377 377 0 8 0 namei 1024 376901 0 376899 5 4 1 1 0 8 0 percpumem 16 584 0 547 1 0 1 1 0 8 0 vcpupl 2048 421 0 0 53 0 53 53 0 8 0 vmpool 560 512 0 91 32 1 31 31 0 8 0 pfiaddrpl 120 112 0 19 4 1 3 3 0 8 0 scsiplug 72 27 0 27 8 8 0 1 0 8 0 scxspl 216 302830 0 302830 45 44 1 8 0 8 1 plimitpl 152 4657 0 4646 1 0 1 1 0 8 0 sigapl 424 37809 0 37771 9 3 6 7 0 8 0 futexpl 64 396099 0 396097 8 7 1 1 0 8 0 knotepl 112 232 0 0 3 0 3 3 0 8 0 kqueuepl 216 8516 0 8505 205 202 3 8 0 8 2 pipepl 336 7624 0 7608 224 222 2 12 0 8 0 fdescpl 496 37748 0 37726 9 6 3 4 0 8 0 filepl 152 309033 0 308877 565 551 14 20 0 8 7 lockfpl 104 12681 0 12678 23 22 1 2 0 8 0 lockfspl 48 3731 0 3728 1 0 1 1 0 8 0 sessionpl 144 177 0 164 1 0 1 1 0 8 0 pgrppl 48 484 0 471 1 0 1 1 0 8 0 ucredpl 96 38229 0 38203 1 0 1 1 0 8 0 zombiepl 144 37771 0 37771 4 3 1 1 0 8 1 processpl 1064 37809 0 37771 10 6 4 5 0 8 0 procpl 672 96666 0 96618 54 48 6 8 0 8 0 srpgc 96 182 0 182 45 45 0 1 0 8 0 sosppl 168 363 0 363 61 60 1 1 0 8 1 sockpl 480 104238 0 104212 2631 2619 12 45 0 8 8 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 20 0 0 3 1 2 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 362 0 0 22 3 19 20 0 8 0 mtagpl 96 1821 0 0 11 2 9 9 0 8 0 mbufpl 256 5818 0 0 237 1 236 236 0 8 0 bufpl 288 68023 0 61702 458 0 458 458 0 8 0 anonpl 24 10536026 0 10517034 641 504 137 165 0 186 0 amapchunkpl 152 1171904 0 1171053 295 259 36 50 0 158 0 amappl16 200 102225 0 101392 423 378 45 57 0 8 0 amappl15 192 5923 0 5923 7 6 1 1 0 8 1 amappl14 184 5797 0 5791 1 0 1 1 0 8 0 amappl13 176 2348 0 2346 1 0 1 1 0 8 0 amappl12 168 4499 0 4495 1 0 1 1 0 8 0 amappl11 160 9279 0 9265 1 0 1 1 0 8 0 amappl10 152 2993 0 2985 1 0 1 1 0 8 0 amappl9 144 6039 0 6035 1 0 1 1 0 8 0 amappl8 136 6627 0 6487 6 1 5 5 0 8 0 amappl7 128 3843 0 3831 1 0 1 1 0 8 0 amappl6 120 6742 0 6720 1 0 1 1 0 8 0 amappl5 112 28748 0 28717 1 0 1 1 0 8 0 amappl4 104 21843 0 21807 3 1 2 2 0 8 0 amappl3 96 8670 0 8645 1 0 1 1 0 8 0 amappl2 88 6449 0 6377 3 1 2 2 0 8 0 amappl1 80 670281 0 669780 21 9 12 13 0 8 0 amappl 88 456527 0 456137 14 4 10 10 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 38260 0 37817 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 38260 0 37817 3 0 3 3 0 8 0 vmmpekpl 168 229378 0 229300 5 1 4 4 0 8 0 vmmpepl 168 3450359 0 3446881 1274 1090 184 195 0 357 18 vmsppl 368 38259 0 37817 42 1 41 41 0 8 0 rwobjpl 56 798917 0 790388 221 100 121 124 0 8 0 pdppl 4096 76528 0 76055 681 206 475 477 0 8 2 pvpl 32 17863490 0 17843111 895 693 202 260 0 265 0 pmappl 248 38259 0 37817 29 1 28 28 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2518 0 980 45 0 45 45 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(ffffffff824804dc) 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(fffffd806efa53b8,ffff8000211dc128,ffff8000211dc158) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000211dc0f8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff8000211dc0f8) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff8000211dc0f8,1,0) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff8000211937a8,ffffff9c,7f7ffffd3240,0,0,ffff8000211dc2e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000211dc350) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211dc350) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3230, 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