panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 314916 60940 0 0 0 0 syz-executor *327625 59534 60928 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e774f) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b039438,ffff80003c44b6d0,ffff80003c44b700) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c44b6a0) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80003c44b6a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff800031009248,ffffff9c,200000000000,ee00,0,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 syscall(ffff80003c44b940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa30cbcde6c0, count: 6 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: bad dir ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e774f) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b039438,ffff80003c44b6d0,ffff80003c44b700) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c44b6a0) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80003c44b6a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff800031009248,ffffff9c,200000000000,ee00,0,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 syscall(ffff80003c44b940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa30cbcde6c0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c44b330 rbx 0xffff8000299eeddf rdx 0xffff800001481500 rcx 0xffff800031009248 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xdbb01e75230a0ac9 r11 0x2c938464a6428419 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff81780d15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c44b320 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=327625 pid=59534 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031008020,0xffff80003c4897a0 process=0xffff800035825880 user=0xffff80003c446000, vmspace=0xfffffd805d4ea3f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89583 491223 68967 0 2 0 syz-executor 89583 403605 68967 0 3 0x4000080 fsleep syz-executor 60940 314916 32910 0 7 0 syz-executor 60940 410404 32910 0 2 0x4000080 syz-executor 59534 395909 43789 60928 2 0x10 syz-executor *59534 327625 43789 60928 7 0x4000010 syz-executor 59534 500844 43789 60928 3 0x4000090 fsleep syz-executor 8062 434353 75849 60928 3 0x90 nanoslp syz-executor 8062 523420 75849 60928 3 0x4000090 kqread syz-executor 8062 5528 75849 60928 3 0x4000090 fsleep syz-executor 1207 23500 40181 0 3 0x80 nanoslp syz-executor 1207 413714 40181 0 3 0x4000080 kqread syz-executor 1207 428336 40181 0 3 0x4000080 fsleep syz-executor 31309 454224 0 0 3 0x14200 bored sosplice 77127 156006 0 0 3 0x14200 acct acct 43789 204411 71877 0 3 0x82 nanoslp syz-executor 32910 71539 71877 0 3 0x82 nanoslp syz-executor 68967 466190 71877 0 3 0x82 nanoslp syz-executor 40181 144124 71877 0 3 0x82 nanoslp syz-executor 72119 359714 71877 0 3 0x10000082 nanoslp syz-executor 43917 331837 71877 0 3 0x2 biowait syz-executor 75849 333929 71877 0 3 0x82 nanoslp syz-executor 98305 191463 71877 0 2 0x2 syz-executor 71877 287885 27183 0 3 0x82 kqread syz-executor 27183 75874 58854 0 3 0x10008a sigsusp ksh 58854 112466 28335 0 3 0x98 kqread sshd-session 28335 521114 54960 0 3 0x92 kqread sshd-session 68763 327983 1 0 3 0x100083 ttyopn getty 54960 504143 1 0 3 0x88 kqread sshd 62248 521424 62373 74 3 0x1100092 bpf pflogd 62373 444106 1 0 3 0x80 sbwait pflogd 9286 225157 67366 73 3 0x1100090 kqread syslogd 67366 307399 1 0 3 0x100082 sbwait syslogd 51609 95004 1 0 3 0x100080 kqread resolvd 64293 504518 85898 77 3 0x100092 kqread dhcpleased 51581 507660 85898 77 3 0x100092 kqread dhcpleased 85898 337046 1 0 3 0x80 kqread dhcpleased 77074 404746 0 0 3 0x14200 bored smr 91066 460533 0 0 2 0x14200 zerothread 43077 67390 0 0 3 0x14200 aiodoned aiodoned 5547 418385 0 0 3 0x14200 syncer update 60659 437813 0 0 3 0x14200 cleaner cleaner 92640 36030 0 0 3 0x14200 reaper reaper 41110 322326 0 0 3 0x14200 pgdaemon pagedaemon 37177 307175 0 0 3 0x14200 bored viomb 3722 260098 0 0 3 0x40014200 acpi0 acpi0 71676 315285 0 0 3 0x40014200 idle1 46219 42415 0 0 3 0x14200 bored softnet7 5893 127562 0 0 3 0x14200 bored softnet6 58040 483634 0 0 3 0x14200 bored softnet5 11739 316748 0 0 3 0x14200 bored softnet4 14352 281509 0 0 3 0x14200 bored softnet3 93007 321997 0 0 3 0x14200 bored softnet2 31451 167124 0 0 3 0x14200 bored softnet1 75373 179726 0 0 3 0x14200 bored softnet0 42033 386797 0 0 3 0x14200 bored systqmp 31946 284230 0 0 3 0x14200 bored systq 95322 75799 0 0 3 0x14200 tmoslp softclockmp 54562 508807 0 0 3 0x40014200 tmoslp softclock 15563 185327 0 0 3 0x40014200 idle0 1 167368 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 59534 (syz-executor) thread 0xffff800031009248 (327625) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b2c68) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:367 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 ffs_bufatoff+0x16f sys/ufs/ffs/ffs_subr.c:71 #5 ufs_lookup+0x58e sys/ufs/ufs/ufs_lookup.c:256 #6 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #7 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #8 namei+0x7ca sys/kern/vfs_lookup.c:250 #9 dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e4c0e80) #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 dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 43917 (syz-executor) thread 0xffff80002a2b87e0 (331837) exclusive rrwlock inode r = 0 (0xfffffd806e096928) #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:3109 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cde78e8) #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:3094 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 11104K 12477K 166960K 12126 0 pcb 17 12K 12K 166960K 115 0 rtable 175 6K 7K 166960K 338 0 pf 34 17K 67485K 166960K 73 0 ifaddr 39 6K 7K 166960K 62 0 ifgroup 55 2K 2K 166960K 85 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1531 0 iov 0 0K 24K 166960K 39 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 1787 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 240K 166960K 630 0 sigio 0 0K 0K 166960K 14 0 proc 72 115K 163K 166960K 587 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 86 0 in_multi 81 6K 7K 166960K 122 0 ether_multi 1 0K 0K 166960K 11 0 mrt 0 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 472 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 163K 173K 166960K 7459 0 UVM aobj 13 2K 2K 166960K 15 0 pinsyscall 40 80K 102K 166960K 1730 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 30 0 NDP 12 0K 2K 166960K 38 0 temp 51 8641K 8779K 166960K 29364 0 kqueue 14 22K 28K 166960K 126 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 60 0 57 1 0 1 1 0 8 0 rtentry 176 119 0 45 5 0 5 5 0 8 0 unpcb 144 446 0 429 7 1 6 6 0 8 5 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 291 0 284 13 6 7 7 0 8 6 arp 128 16 0 6 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 3 0 3 1 0 1 1 0 8 1 inpcb 328 719 0 703 12 5 7 7 0 8 5 nd6 144 19 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 12 0 12 2 1 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 0 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 48 0 2 1 0 1 1 0 8 0 pfstkey 128 48 0 2 2 0 2 2 0 8 0 pfstate 384 48 0 2 5 0 5 5 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 514 0 151 30 1 29 30 0 8 2 art_table 40 515 0 151 5 0 5 5 0 8 0 art_node 32 119 0 55 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 21 0 11 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2441 0 933 95 0 95 95 0 8 0 ffsino 296 2441 0 933 117 0 117 117 0 8 0 nchpl 144 3382 0 1695 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2804 0 0 58 0 58 58 0 8 0 vnodes 216 2804 0 0 156 0 156 156 0 8 0 namei 1024 11229 0 11227 2 1 1 1 0 8 0 percpumem 16 65 0 16 1 0 1 1 0 8 0 kstatmem 264 46 0 20 3 0 3 3 0 8 1 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 18367 0 18366 11 8 3 8 1 8 2 plimitpl 152 272 0 254 1 0 1 1 0 8 0 sigapl 424 931 0 877 7 0 7 7 0 8 0 knotepl 120 527 0 0 16 0 16 16 0 8 0 kqueuepl 224 185 0 174 2 0 2 2 0 8 1 pipepl 344 155 0 128 3 0 3 3 0 8 0 fdescpl 528 907 0 878 3 0 3 3 0 8 0 filepl 160 5111 0 4891 18 3 15 15 0 8 5 lockfpl 104 166 0 164 1 0 1 1 0 8 0 lockfspl 48 69 0 67 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 46 0 29 1 0 1 1 0 8 0 ucredpl 104 706 0 691 1 0 1 1 0 8 0 zombiepl 144 878 0 877 2 1 1 1 0 8 0 processpl 1248 931 0 877 5 0 5 5 0 8 0 procpl 664 1815 0 1753 8 1 7 7 0 8 1 sockpl 752 1234 0 1198 24 12 12 17 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 191 0 0 12 0 12 12 0 8 0 bufpl 280 8387 0 2244 439 0 439 439 0 8 0 anonpl 32 14764 0 0 120 0 120 120 0 246 0 amapchunkpl 152 24214 0 23761 35 9 26 28 0 158 6 amappl16 200 3843 0 3813 47 34 13 35 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 115 0 102 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1560 0 1531 4 2 2 3 0 8 0 amappl11 160 51 0 36 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 249 0 248 2 1 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 111 0 99 1 0 1 1 0 8 0 amappl6 120 182 0 178 1 0 1 1 0 8 0 amappl5 112 123 0 113 1 0 1 1 0 8 0 amappl4 104 304 0 284 1 0 1 1 0 8 0 amappl3 96 4632 0 4527 5 1 4 4 0 8 0 amappl2 88 653 0 590 2 0 2 2 0 8 0 amappl1 80 10441 0 9846 17 2 15 15 0 8 0 amappl 88 6667 0 6512 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 7 0 7 2 2 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 907 0 878 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 907 0 878 1 0 1 1 0 8 0 vmmpekpl 168 8953 0 8913 3 0 3 3 0 8 0 vmmpepl 168 63942 0 62054 126 29 97 119 0 357 5 vmsppl 488 906 0 878 6 1 5 5 0 8 1 rwobjpl 80 22661 0 18917 85 7 78 78 0 8 0 pdppl 4096 1822 0 1756 104 32 72 84 0 8 6 pvpl 32 24277 0 0 196 0 196 196 0 265 0 pmappl 256 906 0 878 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 44 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83823ff0) 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 __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002ec017f0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a5cfc0fee0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83823ff0) 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 __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2a60) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002ec017f0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a5cfc0fee0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e774f) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b039438,ffff80003c44b6d0,ffff80003c44b700) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c44b6a0) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80003c44b6a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff800031009248,ffffff9c,200000000000,ee00,0,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 syscall(ffff80003c44b940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa30cbcde6c0, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e774f) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b039438,ffff80003c44b6d0,ffff80003c44b700) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c44b6a0) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80003c44b6a0) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff800031009248,ffffff9c,200000000000,ee00,0,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2478 syscall(ffff80003c44b940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44b940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa30cbcde6c0, count: -9