panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *104811 96290 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8338ad5c) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009871438,ffff80003c953ab8,ffff80003c953ae8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c953a88) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567 namei(ffff80003c953a88) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003a502d30,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3034 syscall(ffff80003c953d20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c953d20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa442c1a8950, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: bad dir ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8338ad5c) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009871438,ffff80003c953ab8,ffff80003c953ae8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c953a88) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567 namei(ffff80003c953a88) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003a502d30,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3034 syscall(ffff80003c953d20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c953d20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa442c1a8950, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c953730 rbx 0 rdx 0 rcx 0 rax 0xffff80003a502d30 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4ea563a58634cb9d r11 0x416a6548d0412313 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff81531c15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c953720 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=104811 pid=96290 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=0xffff80003a503cc0,0xffffffff839588d8 process=0xffff80003a0e8018 user=0xffff80003c94e000, vmspace=0xfffffd807ece88a0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 96290 180110 14951 0 2 0 syz-executor *96290 104811 14951 0 7 0x4000000 syz-executor 87338 10952 14428 0 3 0x80 nanoslp syz-executor 87338 168729 14428 0 3 0x4000080 kqread syz-executor 40832 272326 27279 -1 2 0xc90 syz-executor 40832 393093 27279 -1 3 0x4000090 msgwait syz-executor 40832 467907 27279 -1 3 0x4000090 fsleep syz-executor 77443 37295 1279 0 2 0xc80 syz-executor 77443 433197 1279 0 3 0x4000080 fsleep syz-executor 77443 348922 1279 0 3 0x4000080 fifor syz-executor 77443 193085 1279 0 3 0x4000080 fsleep syz-executor 91779 204943 87707 0 2 0xc80 syz-executor 91779 143596 87707 0 3 0x4000080 lockf syz-executor 91779 305327 87707 0 3 0x4000080 fsleep syz-executor 4227 503962 1 0 3 0x100083 ttyopn getty 35696 493955 0 0 3 0x14280 nfsidl nfsio 46616 122980 0 0 3 0x14280 nfsidl nfsio 50197 40277 0 0 3 0x14280 nfsidl nfsio 40600 283323 0 0 3 0x14280 nfsidl nfsio 97475 376567 0 0 3 0x14280 nfsidl nfsio 34387 124167 0 0 3 0x14280 nfsidl nfsio 47689 447685 0 0 3 0x14280 nfsidl nfsio 70518 2758 0 0 3 0x14280 nfsidl nfsio 79725 13005 0 0 3 0x14280 nfsidl nfsio 45333 471355 0 0 3 0x14280 nfsidl nfsio 74974 514993 0 0 3 0x14280 nfsidl nfsio 57290 290491 0 0 3 0x14280 nfsidl nfsio 53388 458882 0 0 3 0x14280 nfsidl nfsio 5629 475818 0 0 3 0x14280 nfsidl nfsio 29009 253299 0 0 3 0x14280 nfsidl nfsio 1583 356897 0 0 3 0x14280 nfsidl nfsio 54746 40839 0 0 3 0x14280 nfsidl nfsio 3762 153947 0 0 3 0x14280 nfsidl nfsio 68173 259281 0 0 3 0x14280 nfsidl nfsio 93645 423571 0 0 3 0x14280 nfsidl nfsio 37389 95388 77481 27 3 0x1100092 kqread sshd-auth 77481 451888 53213 0 3 0x82 kqread sshd-session 27279 480104 74844 0 2 0xc82 syz-executor 62938 257967 74844 0 2 0xc82 syz-executor 52184 191263 74844 0 3 0x82 wait syz-executor 14428 485171 74844 0 3 0x82 nanoslp syz-executor 1279 16481 74844 0 2 0xc82 syz-executor 73813 216627 74844 0 3 0x82 wait syz-executor 87707 442592 74844 0 2 0xc82 syz-executor 14951 124541 74844 0 2 0xc82 syz-executor 74844 93601 64941 0 3 0x82 kqread syz-executor 64941 184504 95734 0 3 0x10008a sigsusp ksh 95734 86770 42883 0 3 0x98 kqread sshd-session 42883 496101 53213 0 3 0x92 kqread sshd-session 53213 250260 1 0 3 0x88 kqread sshd 31377 132071 67082 73 3 0x1100090 kqread syslogd 67082 280138 1 0 3 0x100082 sbwait syslogd 37755 154349 1 0 3 0x100080 kqread resolvd 39941 517751 20535 77 3 0x100092 kqread dhcpleased 44981 309602 20535 77 3 0x100092 kqread dhcpleased 20535 243850 1 0 3 0x80 kqread dhcpleased 60589 301832 0 0 3 0x14200 bored smr 294 172944 0 0 2 0x14200 zerothread 74964 379172 0 0 3 0x14200 aiodoned aiodoned 55613 418223 0 0 3 0x14200 syncer update 15059 227175 0 0 3 0x14200 cleaner cleaner 80366 514184 0 0 3 0x14200 reaper reaper 74023 68476 0 0 3 0x14200 pgdaemon pagedaemon 78433 168154 0 0 3 0x14200 bored viomb 986 349140 0 0 3 0x40014200 acpi0 acpi0 57271 291527 0 0 3 0x14200 bored softnet0 96428 489887 0 0 3 0x14200 bored systqmp 37986 62261 0 0 3 0x14200 bored systq 69979 91727 0 0 3 0x40014200 tmoslp softclock 91228 33493 0 0 3 0x40014200 idle0 1 516125 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12239K 12510K 166960K 12768 0 pcb 17 15K 16K 166960K 146 0 rtable 245 8K 9K 166960K 427 0 pf 33 13K 17K 166960K 102 0 ifaddr 42 7K 8K 166960K 75 0 ifgroup 57 2K 2K 166960K 119 0 sysctl 2 1K 9K 166960K 8 0 counters 34 17K 18K 166960K 66 0 ioctlops 0 0K 4K 166960K 101 0 iov 0 0K 16K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1362 86K 86K 166960K 1791 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 52 0 dirhash 12 2K 3K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 559 0 sigio 0 0K 0K 166960K 7 0 proc 63 67K 100K 166960K 560 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 118 0 in_multi 89 6K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 409 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 168K 186K 166960K 6819 0 UVM aobj 12 2K 2K 166960K 12 0 pinsyscall 43 86K 93K 166960K 1674 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 12 0K 2K 166960K 52 0 temp 59 9075K 9139K 166960K 26271 0 kqueue 16 26K 36K 166960K 129 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 198 0 195 3 0 3 3 0 8 2 rtentry 136 124 0 16 5 0 5 5 0 8 0 unpcb 144 437 0 414 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 285 0 279 13 4 9 13 0 8 8 arp 96 19 0 0 1 0 1 1 0 8 0 ipq 40 4 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 3 1 0 1 1 0 8 0 inpcb 328 711 0 700 18 9 9 18 0 8 7 nd6 112 30 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 29 0 28 1 0 1 1 0 8 0 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 5 0 5 1 0 1 1 0 8 1 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pfrule 1360 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 484 0 66 30 0 30 30 0 8 2 art_table 40 485 0 66 5 0 5 5 0 8 0 art_node 32 124 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 2406 0 947 92 0 92 92 0 8 0 ffsino 256 2406 0 947 92 0 92 92 0 8 0 nchpl 144 3163 0 1467 64 0 64 64 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 vnodes 216 2735 0 0 152 0 152 152 0 8 0 namei 1024 11569 0 11567 2 0 2 2 0 8 1 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 72 0 48 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 15935 0 15935 8 0 8 8 1 8 8 plimitpl 152 164 0 146 1 0 1 1 0 8 0 sigapl 424 877 0 812 8 0 8 8 0 8 0 knotepl 120 20676 0 20618 16 6 10 16 0 8 8 kqueuepl 184 163 0 151 1 0 1 1 0 8 0 pipepl 304 203 0 175 8 0 8 8 0 8 5 fdescpl 448 844 0 812 5 0 5 5 0 8 1 filepl 120 5452 0 5206 15 0 15 15 0 8 5 lockfpl 104 284 0 279 2 0 2 2 0 8 1 lockfspl 48 136 0 132 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 51 0 34 1 0 1 1 0 8 0 ucredpl 104 637 0 624 1 0 1 1 0 8 0 zombiepl 144 815 0 812 1 0 1 1 0 8 0 processpl 1152 877 0 812 5 0 5 5 0 8 0 procpl 664 1561 0 1487 8 0 8 8 0 8 0 sosppl 176 2 0 1 1 0 1 1 0 8 0 sockpl 552 1360 0 1323 24 11 13 22 0 8 8 mcl64k 65536 47 0 47 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 1 0 1 1 0 8 1 mcl4k 4096 3104 0 3049 15 0 15 15 0 8 7 mcl2k 2048 767 0 763 2 0 2 2 0 8 1 mtagpl 96 9 0 4 1 0 1 1 0 8 0 mbufpl 256 9431 0 9223 15 0 15 15 0 8 1 bufpl 280 5742 0 106 403 0 403 403 0 8 0 anonpl 24 146486 0 142781 72 0 72 72 0 187 31 amapchunkpl 152 34574 0 34033 40 0 40 40 0 158 19 amappl16 200 2738 0 2706 29 14 15 27 0 8 8 amappl15 192 4 0 4 1 0 1 1 0 8 1 amappl14 184 429 0 428 1 0 1 1 0 8 0 amappl13 176 118 0 106 1 0 1 1 0 8 0 amappl12 168 1087 0 1056 2 0 2 2 0 8 0 amappl11 160 13 0 13 1 0 1 1 0 8 1 amappl10 152 56 0 46 1 0 1 1 0 8 0 amappl9 144 265 0 264 1 0 1 1 0 8 0 amappl8 136 98 0 97 1 0 1 1 0 8 0 amappl7 128 145 0 132 1 0 1 1 0 8 0 amappl6 120 149 0 147 1 0 1 1 0 8 0 amappl5 112 93 0 84 1 0 1 1 0 8 0 amappl4 104 265 0 249 1 0 1 1 0 8 0 amappl3 96 4200 0 4075 4 0 4 4 0 8 0 amappl2 88 536 0 467 2 0 2 2 0 8 0 amappl1 80 11700 0 10987 18 0 18 18 0 8 2 amappl 88 6035 0 5851 5 0 5 5 0 92 0 uvmvnodes 80 113 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 7 0 7 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 844 0 812 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 844 0 812 1 0 1 1 0 8 0 vmmpekpl 168 8541 0 8509 2 0 2 2 0 8 0 vmmpepl 168 62252 0 60129 113 0 113 113 0 357 11 vmsppl 368 843 0 812 4 0 4 4 0 8 1 rwobjpl 40 19444 0 18255 17 0 17 17 0 8 2 pdppl 4096 1694 0 1624 92 22 70 78 0 8 0 pvpl 32 394991 0 384575 170 0 170 170 0 265 62 pmappl 216 843 0 812 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 374 0 26 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8338ad5c) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009871438,ffff80003c953ab8,ffff80003c953ae8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c953a88) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567 namei(ffff80003c953a88) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003a502d30,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3034 syscall(ffff80003c953d20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c953d20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa442c1a8950, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8338ad5c) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009871438,ffff80003c953ab8,ffff80003c953ae8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c953a88) at vfs_lookup+0x961 sys/kern/vfs_lookup.c:567 namei(ffff80003c953a88) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003a502d30,ffffff9c,200000000080,ffffff9c,2000000000c0) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3034 syscall(ffff80003c953d20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c953d20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa442c1a8950, count: -9