panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 192473 52027 0 0 0 0 syz-executor *444467 52027 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833890a2) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c41eac8,ffff80003c41eac8,c2b7ab1854e06f19) at ufs_dirbadentry VOP_LOOKUP(fffffd8009eeb6c0,ffff80003c41ec98,ffff80003c41ecc8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c41ec68) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c41ec68) at namei+0x7aa sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a38ca78,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 syscall(ffff80003c41ef10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ef10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3176672c200, 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(ffffffff833890a2) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c41eac8,ffff80003c41eac8,c2b7ab1854e06f19) at ufs_dirbadentry VOP_LOOKUP(fffffd8009eeb6c0,ffff80003c41ec98,ffff80003c41ecc8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c41ec68) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c41ec68) at namei+0x7aa sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a38ca78,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 syscall(ffff80003c41ef10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ef10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3176672c200, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c41e8f0 rbx 0xffff8000299dedcf rdx 0xffff80000144aac0 rcx 0xffff80002a38ca78 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd70fe41934ae5285 r11 0x4a4d8913b08ff931 r12 0xffff8000299debd0 r13 0 r14 0 r15 0x1 rip 0xffffffff816d2c05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c41e8e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=444467 pid=52027 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a38cf98,0xffff80002a38d758 process=0xffff8000fffeb8c0 user=0xffff80003c419000, vmspace=0xfffffd806ac8d5c0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58161 104959 99223 0 2 0 syz-executor 58161 283396 99223 0 2 0x4000000 syz-executor 58161 393553 99223 0 3 0x4000080 fsleep syz-executor 52027 192473 94332 0 7 0 syz-executor *52027 444467 94332 0 7 0x4000000 syz-executor 58268 397776 32816 0 2 0 syz-executor 26253 342688 30997 0 2 0 syz-executor 26253 138614 30997 0 3 0x4000080 fsleep syz-executor 49215 112341 3917 0 2 0 syz-executor 49215 289784 3917 0 3 0x4000080 fsleep syz-executor 65102 462931 57053 0 3 0 vmmaplk syz-executor 65102 167432 57053 0 3 0x4000000 physio syz-executor 65102 185966 57053 0 3 0x4000000 vmmaplk syz-executor 25700 193579 1 0 3 0x100083 ttyin getty 95322 271785 0 0 3 0x14200 bored sosplice 50350 296942 0 0 3 0x14280 nfsidl nfsio 48371 162423 0 0 3 0x14280 nfsidl nfsio 10539 429002 0 0 3 0x14280 nfsidl nfsio 49368 451336 0 0 3 0x14280 nfsidl nfsio 92671 235697 0 0 3 0x14280 nfsidl nfsio 95948 392550 0 0 3 0x14280 nfsidl nfsio 73236 73062 0 0 3 0x14280 nfsidl nfsio 82246 299764 0 0 3 0x14280 nfsidl nfsio 1304 43402 0 0 3 0x14280 nfsidl nfsio 5206 190561 0 0 3 0x14280 nfsidl nfsio 894 422053 0 0 3 0x14280 nfsidl nfsio 42082 68209 0 0 3 0x14280 nfsidl nfsio 10588 156013 0 0 3 0x14280 nfsidl nfsio 82043 463367 0 0 3 0x14280 nfsidl nfsio 37998 12032 0 0 3 0x14280 nfsidl nfsio 79137 362534 0 0 3 0x14280 nfsidl nfsio 87907 523250 0 0 3 0x14280 nfsidl nfsio 99278 117903 0 0 3 0x14280 nfsidl nfsio 10894 468831 0 0 3 0x14280 nfsidl nfsio 36138 61849 0 0 3 0x14280 nfsidl nfsio 9510 303703 69073 0 3 0x100082 sbwait ndp 69073 285145 6325 0 3 0x10008a sigsusp sh 57053 154228 57477 0 3 0x82 nanoslp syz-executor 15045 188671 57477 0 3 0x82 wait syz-executor 32816 55011 57477 0 3 0x82 nanoslp syz-executor 6325 344383 57477 0 3 0x82 wait syz-executor 3917 139679 57477 0 3 0x82 nanoslp syz-executor 30997 448363 57477 0 3 0x82 nanoslp syz-executor 99223 508143 57477 0 3 0x82 nanoslp syz-executor 94332 137567 57477 0 3 0x82 nanoslp syz-executor 57477 473531 63890 0 3 0x82 kqread syz-executor 63890 104269 33764 0 3 0x10008a sigsusp ksh 33764 19043 88369 0 3 0x98 kqread sshd-session 88369 468688 14879 0 3 0x92 kqread sshd-session 14879 138659 1 0 3 0x88 kqread sshd 18066 496481 47886 74 3 0x1100092 bpf pflogd 47886 65977 1 0 3 0x80 sbwait pflogd 6392 112688 53223 73 3 0x1100090 kqread syslogd 53223 14039 1 0 3 0x100082 sbwait syslogd 88034 319318 1 0 3 0x100080 kqread resolvd 4749 64386 19419 77 3 0x100092 kqread dhcpleased 4036 35917 19419 77 3 0x100092 kqread dhcpleased 19419 256095 1 0 3 0x80 kqread dhcpleased 46876 122869 0 0 3 0x14200 bored smr 84405 503991 0 0 3 0x14200 pgzero zerothread 11786 276059 0 0 3 0x14200 aiodoned aiodoned 97041 354509 0 0 3 0x14200 syncer update 32789 523233 0 0 3 0x14200 cleaner cleaner 38949 356940 0 0 3 0x14200 reaper reaper 81460 144335 0 0 3 0x14200 pgdaemon pagedaemon 66187 314359 0 0 3 0x14200 bored viomb 12810 224216 0 0 3 0x40014200 acpi0 acpi0 85410 391883 0 0 3 0x40014200 idle1 1914 518867 0 0 3 0x14200 bored softnet3 91692 318413 0 0 3 0x14200 bored softnet2 45409 513246 0 0 3 0x14200 bored softnet1 18325 310761 0 0 3 0x14200 bored softnet0 57380 350441 0 0 3 0x14200 bored systqmp 13922 232646 0 0 3 0x14200 bored systq 99725 423620 0 0 3 0x14200 tmoslp softclockmp 97137 71470 0 0 3 0x40014200 tmoslp softclock 66017 52783 0 0 3 0x40014200 idle0 1 58716 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 52027 (syz-executor) thread 0xffff80002a38ca78 (444467) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a19548) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #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 ffs_bufatoff+0x16f sys/ufs/ffs/ffs_subr.c:71 #6 ufs_lookup+0x548 sys/ufs/ufs/ufs_lookup.c:256 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #9 namei+0x7aa sys/kern/vfs_lookup.c:250 #10 dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 #11 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e31cf40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #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:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 65102 (syz-executor) thread 0xffff80002a38c038 (167432) shared rwlock vmmaplk r = 0 (0xfffffd806ac8dc60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_write+0x120 sys/kern/spec_vnops.c:302 #5 VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 #6 vn_write+0x1d4 sys/kern/vfs_vnops.c:408 #7 dofilewritev+0x23c sys/kern/sys_generic.c:380 #8 sys_write+0xa2 sys/kern/sys_generic.c:300 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 11023K 11373K 166960K 11835 0 pcb 17 14K 16K 166960K 155 0 rtable 159 7K 8K 166960K 393 0 pf 33 17K 19K 166960K 74 0 ifaddr 32 5K 7K 166960K 64 0 ifgroup 51 2K 2K 166960K 95 0 sysctl 3 1K 1K 166960K 3 0 counters 62 36K 37K 166960K 112 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 16K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1393 88K 88K 166960K 1710 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 93K 166960K 548 0 sigio 0 0K 0K 166960K 9 0 proc 72 91K 128K 166960K 574 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 0 0K 0K 166960K 54 0 in_multi 63 4K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 450 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 248 162K 176K 166960K 6575 0 UVM aobj 14 2K 2K 166960K 14 0 pinsyscall 45 90K 109K 166960K 1640 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 27 0 NDP 11 0K 2K 166960K 40 0 temp 77 8664K 8728K 166960K 19342 0 kqueue 13 20K 30K 166960K 85 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 58 0 54 1 0 1 1 0 8 0 rtentry 176 119 0 53 6 0 6 6 0 8 0 unpcb 144 351 0 333 5 3 2 4 0 8 1 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 188 0 183 7 3 4 4 0 8 3 arp 128 18 0 6 1 0 1 1 0 8 0 inpcb 384 643 0 635 14 9 5 11 0 8 3 nd6 144 26 0 10 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 18 0 18 2 1 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 1 2 1 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 pfstitem 24 45 0 4 1 0 1 1 0 8 0 pfstkey 128 45 0 4 2 0 2 2 0 8 0 pfstate 384 44 0 4 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 506 0 217 29 2 27 29 0 8 4 art_table 32 508 0 217 4 0 4 4 0 8 0 art_node 16 117 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 2 1 1 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 24 0 7 3 0 3 3 0 8 0 dino2pl 256 2361 0 858 95 0 95 95 0 8 0 ffsino 288 2361 0 858 109 0 109 109 0 8 0 nchpl 144 3198 0 1512 63 0 63 63 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 uvmvnodes 80 2636 0 0 54 0 54 54 0 8 0 vnodes 216 2636 0 0 147 0 147 147 0 8 0 namei 1024 10469 0 10467 2 1 1 1 0 8 0 percpumem 16 71 0 25 1 0 1 1 0 8 0 kstatmem 264 48 0 26 4 1 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 9761 0 9760 10 9 1 8 1 8 0 plimitpl 152 71 0 53 1 0 1 1 0 8 0 sigapl 424 870 0 798 9 0 9 9 0 8 0 knotepl 120 319 0 0 10 0 10 10 0 8 0 kqueuepl 224 287 0 278 7 2 5 5 0 8 4 pipepl 336 137 0 110 3 0 3 3 0 8 0 fdescpl 520 831 0 798 3 0 3 3 0 8 0 filepl 160 4695 0 4481 23 6 17 17 0 8 7 lockfpl 104 230 0 228 2 0 2 2 0 8 1 lockfspl 48 110 0 108 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 577 0 564 1 0 1 1 0 8 0 zombiepl 144 799 0 798 3 2 1 1 0 8 0 processpl 1208 870 0 798 6 0 6 6 0 8 0 procpl 656 1561 0 1482 8 0 8 8 0 8 0 srpgc 96 6 0 6 2 1 1 1 0 8 1 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 728 1070 0 1040 21 14 7 18 0 8 3 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 1126 0 0 71 0 71 71 0 8 0 bufpl 280 3012 0 126 207 0 207 207 0 8 0 anonpl 32 11527 0 0 93 0 93 93 0 246 0 amapchunkpl 152 20993 0 20417 41 12 29 29 0 158 4 amappl16 200 3077 0 2831 25 10 15 19 0 8 2 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 116 0 102 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1475 0 1442 3 1 2 2 0 8 0 amappl11 160 51 0 36 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 108 0 95 1 0 1 1 0 8 0 amappl6 120 181 0 177 1 0 1 1 0 8 0 amappl5 112 130 0 121 1 0 1 1 0 8 0 amappl4 104 338 0 317 1 0 1 1 0 8 0 amappl3 96 4027 0 3918 5 1 4 4 0 8 0 amappl2 88 644 0 579 2 0 2 2 0 8 0 amappl1 80 10297 0 9662 16 1 15 15 0 8 0 amappl 88 5819 0 5649 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 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 831 0 798 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 831 0 798 1 0 1 1 0 8 0 vmmpekpl 168 8343 0 8297 3 0 3 3 0 8 0 vmmpepl 168 58963 0 56696 108 4 104 104 0 357 5 vmsppl 480 830 0 798 5 0 5 5 0 8 0 rwobjpl 72 20744 0 16903 71 1 70 70 0 8 0 pdppl 4096 1669 0 1596 105 32 73 85 0 8 0 pvpl 32 20608 0 0 168 1 167 167 0 265 0 pmappl 256 830 0 798 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 459 0 43 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83846ff0) 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(ffffffff83a19340) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83a19340) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003bbfa210,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x72c464203990, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83846ff0) 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(ffffffff83a19340) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83a19340) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003bbfa210,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x72c464203990, 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(ffffffff833890a2) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c41eac8,ffff80003c41eac8,c2b7ab1854e06f19) at ufs_dirbadentry VOP_LOOKUP(fffffd8009eeb6c0,ffff80003c41ec98,ffff80003c41ecc8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c41ec68) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c41ec68) at namei+0x7aa sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a38ca78,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 syscall(ffff80003c41ef10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ef10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3176672c200, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833890a2) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c41eac8,ffff80003c41eac8,c2b7ab1854e06f19) at ufs_dirbadentry VOP_LOOKUP(fffffd8009eeb6c0,ffff80003c41ec98,ffff80003c41ecc8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c41ec68) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c41ec68) at namei+0x7aa sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a38ca78,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 syscall(ffff80003c41ef10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41ef10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3176672c200, count: -9