panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *243892 51338 0 0 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833da98a) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd80654563e0,ffff80002a263c02,5,fffffd80654564c4,ffff80002a31bfe0,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80724cb120,ffff80002a31c288,ffff80002a31c2b8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a31c258) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a31c258) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff800039bdad20,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a31c500) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31c500) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9fa166246e0, 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: ufsdirhash_lookup: bad offset in hash array ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833da98a) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd80654563e0,ffff80002a263c02,5,fffffd80654564c4,ffff80002a31bfe0,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80724cb120,ffff80002a31c288,ffff80002a31c2b8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a31c258) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a31c258) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff800039bdad20,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a31c500) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31c500) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9fa166246e0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a31be00 rbx 0xffffffff8385ce07 cpu_info_full_primary+0x2e07 rdx 0xffff80000147aec0 rcx 0xffff800039bdad20 rax 0xffffffff8385bff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x500e90300479c916 r11 0x4f80ab5b0bf15cd1 r12 0xffffffff8385cc08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff81117245 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a31bdf0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=243892 pid=51338 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039bdb250,0xffff80003c44caa8 process=0xffff8000fffe66b0 user=0xffff80002a317000, vmspace=0xfffffd806b1495d0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63003 421924 33673 0 2 0 syz-executor 63003 255762 33673 0 3 0x4000080 fsleep syz-executor 63003 152545 33673 0 3 0x4000080 fsleep syz-executor 63003 218086 33673 0 3 0x4000080 fsleep syz-executor 51338 139390 93545 0 2 0 syz-executor *51338 243892 93545 0 7 0x4000000 syz-executor 39105 428633 95142 0 2 0 syz-executor 39105 44617 95142 0 3 0x4000080 fsleep syz-executor 39177 180716 80556 0 2 0 syz-executor 39177 312497 80556 0 3 0x4000080 fsleep syz-executor 37646 74096 7676 0 2 0 syz-executor 37646 429670 7676 0 3 0x4000080 bell syz-executor 97402 244390 58460 0 2 0x2 ifconfig 58460 485773 94939 0 3 0x10008a sigsusp sh 94939 508132 29084 0 3 0x82 wait syz-executor 16942 503482 0 0 3 0x14200 acct acct 27032 336671 1 0 3 0x100083 ttyopn getty 7676 89116 29084 0 3 0x82 nanoslp syz-executor 85772 511010 29084 0 2 0x2 syz-executor 93545 64359 29084 0 2 0xc82 syz-executor 65982 66606 29084 0 2 0x2 syz-executor 45062 94210 85555 0 3 0x82 sbwait sshd-session 33673 99169 29084 0 2 0xc82 syz-executor 95142 87034 29084 0 2 0xc82 syz-executor 80556 59503 29084 0 3 0x82 nanoslp syz-executor 29084 340913 39578 0 2 0x2 syz-executor 39578 268459 2770 0 3 0x10008a sigsusp ksh 2770 136631 63740 0 3 0x98 kqread sshd-session 63740 271147 85555 0 3 0x92 kqread sshd-session 85555 169346 1 0 3 0x88 kqread sshd 54739 374819 21363 74 3 0x1100092 bpf pflogd 21363 104645 1 0 3 0x80 sbwait pflogd 56284 81792 16376 73 3 0x1100090 kqread syslogd 16376 244166 1 0 3 0x100082 sbwait syslogd 60223 382728 1 0 3 0x100080 kqread resolvd 50483 350240 12291 77 3 0x100092 kqread dhcpleased 57296 153776 12291 77 3 0x100092 kqread dhcpleased 12291 431671 1 0 3 0x80 kqread dhcpleased 52265 500777 0 0 3 0x14200 bored smr 7039 269511 0 0 2 0x14200 zerothread 55992 116902 0 0 3 0x14200 aiodoned aiodoned 23626 168751 0 0 3 0x14200 syncer update 18118 307195 0 0 3 0x14200 cleaner cleaner 55781 133864 0 0 3 0x14200 reaper reaper 96726 193458 0 0 3 0x14200 pgdaemon pagedaemon 45282 216835 0 0 3 0x14200 bored viomb 67676 2304 0 0 3 0x40014200 acpi0 acpi0 95481 212865 0 0 7 0x40014200 idle1 93092 465733 0 0 3 0x14200 bored softnet1 98982 37054 0 0 2 0x14200 softnet0 64013 367599 0 0 3 0x14200 bored systqmp 94638 202877 0 0 3 0x14200 bored systq 55635 315305 0 0 3 0x14200 tmoslp softclockmp 56683 202434 0 0 3 0x40014200 tmoslp softclock 7315 264844 0 0 3 0x40014200 idle0 1 515413 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 51338 (syz-executor) thread 0xffff800039bdad20 (243892) exclusive rrwlock inode r = 0 (0xfffffd8065456480) #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+0xa3 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 dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839303a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 #2 Xsyscall+0x128 Process 85772 (syz-executor) thread 0xffff80003c44d260 (511010) exclusive rrwlock inode r = 0 (0xfffffd8065456230) #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+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ae62330) #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+0xa3 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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11063K 12429K 166960K 17452 0 pcb 17 20K 22K 166960K 1330 0 rtable 187 13K 16K 166960K 2327 0 pf 35 17K 82K 166960K 936 0 ifaddr 30 8K 13K 166960K 585 0 ifgroup 55 2K 3K 166960K 1109 0 sysctl 4 1K 9K 166960K 103 0 counters 70 37K 39K 166960K 1280 0 ioctlops 0 0K 8K 166960K 3199 0 iov 0 0K 28K 166960K 598 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1475 93K 94K 166960K 6918 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 37 0 VM map 2 1K 1K 166960K 2 0 sem 21 136K 136K 166960K 75 0 dirhash 207 36K 36K 166960K 11337 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 7242 0 sigio 0 0K 0K 166960K 273 0 proc 84 148K 164K 166960K 2217 0 subproc 72 4K 4K 166960K 429 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1649 0 in_multi 44 3K 7K 166960K 721 0 ether_multi 1 0K 0K 166960K 95 0 mrt 1 0K 0K 166960K 50 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 2290 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 164K 186K 166960K 65707 0 UVM aobj 195 55K 55K 166960K 207 0 pinsyscall 44 88K 102K 166960K 9275 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 471 0 NDP 12 0K 2K 166960K 473 0 temp 95 8680K 8807K 166960K 394346 0 kqueue 13 20K 33K 166960K 1379 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 120 770 0 767 5 4 1 3 0 8 0 rtentry 176 639 0 581 6 1 5 6 0 8 0 unpcb 144 5327 0 5306 42 40 2 6 0 8 1 syncache 336 41 0 41 17 16 1 1 0 8 1 tcpqe 32 14 0 14 11 10 1 1 0 8 1 tcpcb 736 3080 0 3068 66 61 5 14 0 8 2 arp 136 107 0 98 1 0 1 1 0 8 0 inpcb 328 8980 0 8964 74 67 7 13 0 8 4 nd6 152 134 0 123 2 1 1 2 0 8 0 pkpcb 40 67 0 67 14 13 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 mppekey 1024 7 0 7 4 4 0 1 0 8 0 ppxss 1192 493 0 493 4 3 1 1 0 8 1 pppxif 1504 40 0 40 14 13 1 1 0 8 1 pffrag 232 48 0 42 1 0 1 1 0 482 0 pffrnode 88 41 0 35 1 0 1 1 0 8 0 pffrent 40 233 0 227 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 16 0 16 7 7 0 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 469 0 361 1 0 1 1 0 8 0 pfstkey 128 469 0 361 6 0 6 6 0 8 0 pfstate 448 469 0 361 19 3 16 19 0 8 0 pfrule 1344 29 0 24 2 1 1 2 0 8 0 rttmr 136 8 0 8 8 8 0 1 0 8 0 art_heap8 4096 7 0 2 7 2 5 7 0 8 0 art_heap4 256 2656 0 2407 43 19 24 31 0 8 1 art_table 40 2663 0 2409 6 1 5 6 0 8 0 art_node 32 632 0 581 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 17 2 1 1 1 0 8 0 semupl 112 4 0 4 4 4 0 1 0 8 0 semapl 112 70 0 51 1 0 1 1 0 8 0 shmpl 112 178 0 6 5 0 5 5 0 8 0 dirhash 1024 3796 0 3714 12 1 11 11 0 8 0 dino2pl 256 14795 0 13200 100 0 100 100 0 8 0 ffsino 296 14795 0 13200 123 0 123 123 0 8 0 nchpl 144 24859 0 24137 67 40 27 64 0 8 0 rtmask 32 51 0 51 12 11 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 92333 0 92330 7 6 1 2 0 8 0 percpumem 16 655 0 605 1 0 1 1 0 8 0 vcpupl 3968 22 0 2 3 0 3 3 0 8 0 vmpool 840 26 0 6 3 0 3 3 0 8 0 kstatmem 264 792 0 762 4 1 3 3 0 8 0 acpiwqpl 32 4 0 4 1 0 1 1 1 8 1 scsiplug 72 30 0 30 13 12 1 1 0 8 1 scxspl 216 176818 0 176818 11 10 1 3 1 8 1 plimitpl 152 1692 0 1674 1 0 1 1 0 8 0 sigapl 424 7473 0 7424 9 2 7 8 0 8 0 knotepl 120 994 0 0 25 0 25 25 0 8 0 kqueuepl 224 3366 0 3357 39 37 2 5 0 8 1 pipepl 344 1307 0 1280 36 32 4 9 0 8 1 fdescpl 528 7421 0 7389 3 0 3 3 0 8 0 filepl 160 55522 0 55301 63 49 14 23 0 8 1 lockfpl 104 2907 0 2905 4 3 1 2 0 8 0 lockfspl 48 1057 0 1055 1 0 1 1 0 8 0 sessionpl 144 92 0 82 1 0 1 1 0 8 0 pgrppl 48 369 0 351 1 0 1 1 0 8 0 ucredpl 104 8942 0 8928 1 0 1 1 0 8 0 zombiepl 144 8609 0 8609 2 1 1 1 0 8 1 processpl 1232 7473 0 7424 7 2 5 6 0 8 0 procpl 664 18785 0 18729 8 1 7 8 0 8 0 sosppl 176 63 0 63 15 14 1 1 0 8 1 sockpl 752 15391 0 15351 134 123 11 22 0 8 5 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 147 0 0 18 0 18 18 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 127 0 0 9 2 7 9 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 1995 0 0 111 0 111 111 0 8 0 bufpl 280 71081 0 64944 439 0 439 439 0 8 0 anonpl 32 15746 0 0 126 0 126 126 0 246 0 amapchunkpl 152 240217 0 239656 122 86 36 42 0 158 8 amappl16 200 22224 0 22151 145 129 16 34 0 8 0 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 817 0 814 1 0 1 1 0 8 0 amappl12 168 8073 0 8030 3 0 3 3 0 8 0 amappl11 160 45 0 45 2 2 0 1 0 8 0 amappl10 152 84 0 70 1 0 1 1 0 8 0 amappl9 144 267 0 267 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 214 0 211 1 0 1 1 0 8 0 amappl6 120 688 0 671 1 0 1 1 0 8 0 amappl5 112 109 0 97 1 0 1 1 0 8 0 amappl4 104 762 0 730 1 0 1 1 0 8 0 amappl3 96 47576 0 47474 4 0 4 4 0 8 0 amappl2 88 1101 0 1029 2 0 2 2 0 8 0 amappl1 80 50073 0 49395 20 4 16 16 0 8 0 amappl 88 63028 0 62863 5 0 5 5 0 92 0 uvmvnodes 80 268 0 1 6 0 6 6 0 8 0 dma65536 65536 7 0 7 5 4 1 1 0 8 1 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 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 9 0 9 4 4 0 1 0 8 0 dma128 128 261 0 261 7 6 1 1 0 8 1 dma64 64 10 0 10 5 5 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 206 0 12 4 0 4 4 0 8 0 uaddrrnd 24 7421 0 7389 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7421 0 7389 1 0 1 1 0 8 0 vmmpekpl 168 54635 0 54563 4 0 4 4 0 8 0 vmmpepl 168 475641 0 473570 203 95 108 121 0 357 0 vmsppl 488 7420 0 7389 5 0 5 5 0 8 0 rwobjpl 80 118658 0 117110 68 28 40 44 0 8 0 pdppl 4096 14902 0 14810 191 95 96 96 0 8 4 pvpl 32 25195 0 0 201 0 201 201 0 265 0 pmappl 256 7446 0 7395 4 0 4 4 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 628 0 223 12 0 12 12 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(ffffffff833da98a) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd80654563e0,ffff80002a263c02,5,fffffd80654564c4,ffff80002a31bfe0,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80724cb120,ffff80002a31c288,ffff80002a31c2b8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a31c258) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a31c258) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff800039bdad20,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a31c500) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31c500) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9fa166246e0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5