panic: bad dir Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *508305 94057 0 0 0x4000000 0 syz-executor.6 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c85f) at panic+0x165 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1749 ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x1749 sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806963b2c8,ffff80002172c590,ffff80002172c5c0) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002172c560) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80002172c560) at namei+0x55a sys/kern/vfs_lookup.c:250 doreadlinkat(ffff8000ffff0b00,ffffff9c,200003c0,20000400,6c,ffff80002172c720) at doreadlinkat+0x81 sys/kern/vfs_syscalls.c:2165 syscall(ffff80002172c7a0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe30d8f951d0, 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+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c85f) at panic+0x165 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1749 ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x1749 sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806963b2c8,ffff80002172c590,ffff80002172c5c0) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002172c560) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80002172c560) at namei+0x55a sys/kern/vfs_lookup.c:250 doreadlinkat(ffff8000ffff0b00,ffffff9c,200003c0,20000400,6c,ffff80002172c720) at doreadlinkat+0x81 sys/kern/vfs_syscalls.c:2165 syscall(ffff80002172c7a0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe30d8f951d0, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002172c1f0 rbx 0 rdx 0 rcx 0 rax 0xffff8000ffff0b00 r8 0x101010101010101 r9 0x8080808080808080 r10 0xbd495ff52b65138 r11 0x10d53ebfb31c7941 r12 0 r13 0xfffffd80647a05b0 r14 0 r15 0x1 rip 0xffffffff81a1bb9c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002172c1e0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.6) pid=508305 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800024da9638,0xffff800024da85f8 process=0xffff8000299e6010 user=0xffff800021727000, vmspace=0xfffffd8070894a18 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 94057 86198 94312 0 2 0 syz-executor.6 94057 84533 94312 0 2 0x4000000 syz-executor.6 *94057 508305 94312 0 7 0x4000000 syz-executor.6 94057 447104 94312 0 3 0x4000080 fsleep syz-executor.6 85966 18572 33532 0 2 0 syz-executor.7 85966 378429 33532 0 3 0x4000080 netio syz-executor.7 85966 310982 33532 0 3 0x4000080 netcon syz-executor.7 85966 62306 33532 0 3 0x4000080 fsleep syz-executor.7 20132 426410 45638 0 3 0x82 nanoslp syz-executor.1 94312 213123 45638 0 3 0x82 nanoslp syz-executor.6 44981 460492 45638 0 3 0x82 nanoslp syz-executor.4 12385 130591 0 0 3 0x14280 nfsidl nfsio 17047 205865 0 0 3 0x14280 nfsidl nfsio 52096 216110 0 0 3 0x14280 nfsidl nfsio 8141 254336 0 0 3 0x14280 nfsidl nfsio 63864 4436 0 0 3 0x14280 nfsidl nfsio 73848 361754 0 0 3 0x14280 nfsidl nfsio 99679 169627 0 0 3 0x14280 nfsidl nfsio 91572 100808 0 0 3 0x14280 nfsidl nfsio 14441 260284 0 0 3 0x14280 nfsidl nfsio 97837 352966 0 0 3 0x14280 nfsidl nfsio 98014 140620 0 0 3 0x14280 nfsidl nfsio 12776 7021 0 0 3 0x14280 nfsidl nfsio 89159 405478 0 0 3 0x14280 nfsidl nfsio 91377 254464 0 0 3 0x14280 nfsidl nfsio 77164 483322 0 0 3 0x14280 nfsidl nfsio 85094 371241 0 0 3 0x14280 nfsidl nfsio 95690 373778 0 0 3 0x14280 nfsidl nfsio 30507 401160 0 0 3 0x14280 nfsidl nfsio 99 498775 0 0 3 0x14280 nfsidl nfsio 82624 378500 0 0 3 0x14280 nfsidl nfsio 63439 236575 45638 0 2 0x2 syz-executor.0 72803 178809 45638 0 3 0x82 piperd syz-executor.2 14185 228425 0 0 3 0x14200 acct acct 12855 418782 0 0 3 0x14200 bored sosplice 33532 209475 45638 0 3 0x82 nanoslp syz-executor.7 45638 292880 66055 0 3 0x82 thrsleep syz-fuzzer 45638 38241 66055 0 3 0x4000082 nanoslp syz-fuzzer 45638 202059 66055 0 3 0x4000082 kqread syz-fuzzer 45638 197975 66055 0 3 0x4000082 wait syz-fuzzer 45638 76634 66055 0 3 0x4000082 wait syz-fuzzer 45638 442277 66055 0 3 0x4000082 thrsleep syz-fuzzer 45638 148490 66055 0 3 0x4000082 wait syz-fuzzer 45638 502547 66055 0 3 0x4000082 thrsleep syz-fuzzer 45638 4607 66055 0 3 0x4000082 wait syz-fuzzer 45638 327746 66055 0 3 0x4000082 wait syz-fuzzer 45638 150617 66055 0 3 0x4000082 thrsleep syz-fuzzer 45638 400542 66055 0 3 0x4000082 wait syz-fuzzer 45638 296848 66055 0 3 0x4000082 wait syz-fuzzer 45638 254484 66055 0 3 0x4000082 wait syz-fuzzer 66055 268705 61242 0 3 0x10008a sigsusp ksh 61242 507977 24635 0 3 0x9a kqread sshd 25608 109855 1 0 3 0x100083 ttyin getty 24635 298968 1 0 3 0x88 kqread sshd 13234 184361 78144 73 3 0x1100090 kqread syslogd 78144 400093 1 0 3 0x100082 netio syslogd 73523 386052 1 0 3 0x100080 kqread resolvd 47872 479502 47426 77 3 0x100092 kqread dhcpleased 89419 17945 47426 77 3 0x100092 kqread dhcpleased 47426 58992 1 0 3 0x80 kqread dhcpleased 65796 471158 0 0 3 0x14200 bored smr 45886 80776 0 0 2 0x14200 zerothread 76928 57780 0 0 3 0x14200 aiodoned aiodoned 27534 99474 0 0 3 0x14200 syncer update 64376 520038 0 0 3 0x14200 cleaner cleaner 6773 479447 0 0 3 0x14200 reaper reaper 47525 198666 0 0 3 0x14200 pgdaemon pagedaemon 83208 191151 0 0 3 0x14200 bored viomb 75210 381134 0 0 3 0x40014200 acpi0 acpi0 35265 467340 0 0 3 0x14200 bored softnet3 63643 196110 0 0 3 0x14200 bored softnet2 60930 231540 0 0 3 0x14200 bored softnet1 51453 513761 0 0 3 0x14200 bored softnet0 48771 40962 0 0 3 0x14200 bored systqmp 83559 297886 0 0 3 0x14200 bored systq 87356 480837 0 0 3 0x40014200 bored softclock 60629 112985 0 0 3 0x40014200 idle0 1 454861 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 10211 6422K 6978K 78643K 15391 0 pcb 14 18K 21K 78643K 6123 0 rtable 190 16K 17K 78643K 2282 0 ifaddr 86 23K 23K 78643K 743 0 sysctl 3 1K 1K 78643K 3 0 counters 31 17K 17K 78643K 267 0 ioctlops 0 0K 2K 78643K 1049 0 iov 0 0K 32K 78643K 1110 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1664 104K 104K 78643K 6163 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 73 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 297 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 81K 78643K 7240 0 sigio 0 0K 0K 78643K 200 0 proc 66 59K 83K 78643K 1536 0 subproc 104 6K 6K 78643K 455 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 723 0 in_multi 73 4K 6K 78643K 647 0 ether_multi 1 0K 0K 78643K 61 0 mrt 3 0K 0K 78643K 78 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 217 970K 970K 78643K 217 0 exec 0 0K 1K 78643K 1826 0 pfkey data 0 0K 0K 78643K 7 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 8 62K 64K 78643K 10 0 UVM amap 328 89K 106K 78643K 68753 0 UVM aobj 131 4K 4K 78643K 135 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 206 0 NDP 17 0K 2K 78643K 228 0 temp 152 5867K 14054K 78643K 99592 0 kqueue 12 18K 26K 78643K 660 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1104 0 1101 16 15 1 3 0 8 0 rtentry 112 542 0 466 4 1 3 4 0 8 0 unpcb 144 10859 0 10846 88 87 1 10 0 8 0 syncache 296 59 0 59 13 12 1 1 0 8 1 tcpqe 32 110 0 110 7 7 0 1 0 8 0 tcpcb 776 2688 0 2681 61 60 1 8 0 8 0 arp 88 74 0 62 1 0 1 1 0 8 0 ipq 40 10 0 10 3 3 0 1 0 8 0 ipqe 40 30 0 30 3 3 0 1 0 8 0 inpcb 336 13399 0 13388 164 157 7 18 0 8 6 nd6 104 115 0 98 1 0 1 1 0 8 0 pkpcb 40 91 0 91 7 7 0 1 0 8 0 kcovpl 48 35 0 27 1 0 1 1 0 8 0 ppxss 1160 138 0 137 11 10 1 1 0 8 0 pppxif 1360 35 0 34 8 7 1 1 0 8 0 rttmr 136 19 0 19 5 5 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2560 0 2188 52 28 24 29 0 8 0 art_table 32 2561 0 2188 4 0 4 4 0 8 0 art_node 16 533 0 467 1 0 1 1 0 8 0 sysvmsgpl 40 71 0 31 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 292 0 282 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11861 0 10398 92 0 92 92 0 8 0 ffsino 240 11861 0 10398 87 0 87 87 0 8 0 nchpl 144 21997 0 20350 63 0 63 63 0 8 0 rtmask 32 3 0 3 2 2 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 88198 0 88197 7 6 1 3 0 8 0 kstatmem 264 298 0 264 6 3 3 3 0 8 0 scsiplug 72 11 0 11 3 3 0 1 0 8 0 scxspl 216 65551 0 65551 24 23 1 8 0 8 1 plimitpl 152 951 0 936 1 0 1 1 0 8 0 sigapl 424 7522 0 7459 10 2 8 8 0 8 0 futexpl 64 84964 0 84962 5 4 1 1 0 8 0 knotepl 120 125383 0 125307 85 81 4 13 0 8 0 kqueuepl 184 1663 0 1654 14 13 1 4 0 8 0 pipepl 288 2562 0 2535 50 47 3 10 0 8 0 fdescpl 432 7464 0 7440 4 0 4 4 0 8 0 filepl 120 69034 0 68795 106 94 12 19 0 8 2 lockfpl 104 2373 0 2371 4 3 1 2 0 8 0 lockfspl 48 707 0 705 1 0 1 1 0 8 0 sessionpl 144 50 0 34 1 0 1 1 0 8 0 pgrppl 48 71 0 55 1 0 1 1 0 8 0 ucredpl 104 7766 0 7755 1 0 1 1 0 8 0 zombiepl 144 7463 0 7459 4 3 1 1 0 8 0 processpl 1008 7522 0 7459 12 3 9 9 0 8 0 procpl 696 18537 0 18455 17 7 10 10 0 8 1 sosppl 168 235 0 235 16 15 1 1 0 8 1 sockpl 456 25554 0 25524 576 564 12 35 0 8 7 mcl64k 65536 558 0 557 15 14 1 1 0 8 0 mcl16k 16384 313 0 312 18 17 1 1 0 8 0 mcl12k 12288 258 0 258 17 17 0 1 0 8 0 mcl9k 9216 117 0 117 19 18 1 1 0 8 1 mcl8k 8192 687 0 687 17 16 1 1 0 8 1 mcl4k 4096 978 0 978 12 11 1 1 0 8 1 mcl2k2 2112 72 0 72 19 19 0 1 0 8 0 mcl2k 2048 87173 0 87134 48 42 6 29 0 8 0 mtagpl 96 60 0 60 3 3 0 1 0 8 0 mbufpl 256 238412 0 238249 852 838 14 543 0 8 1 bufpl 288 16957 0 10569 457 0 457 457 0 8 0 anonpl 24 864890 0 850935 178 72 106 127 0 188 0 amapchunkpl 152 227625 0 226821 113 77 36 50 0 158 2 amappl16 200 17606 0 17121 90 61 29 39 0 8 0 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 235 0 222 2 1 1 2 0 8 0 amappl13 176 11 0 10 1 0 1 1 0 8 0 amappl12 168 8486 0 8459 2 0 2 2 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 53 0 44 1 0 1 1 0 8 0 amappl9 144 365 0 363 2 1 1 2 0 8 0 amappl8 136 369 0 295 3 0 3 3 0 8 0 amappl7 128 96 0 77 1 0 1 1 0 8 0 amappl6 120 468 0 448 2 1 1 2 0 8 0 amappl5 112 354 0 348 1 0 1 1 0 8 0 amappl4 104 1107 0 1071 2 0 2 2 0 8 0 amappl3 96 43110 0 43040 3 0 3 3 0 8 0 amappl2 88 8002 0 7943 4 2 2 3 0 8 0 amappl1 80 37020 0 36527 22 11 11 22 0 8 0 amappl 88 67846 0 67636 6 0 6 6 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 7464 0 7440 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7464 0 7440 1 0 1 1 0 8 0 vmmpekpl 168 58948 0 58897 3 0 3 3 0 8 0 vmmpepl 168 463367 0 461221 294 184 110 133 0 357 0 vmsppl 368 7463 0 7440 3 0 3 3 0 8 0 rwobjpl 24 117274 0 109732 47 0 47 47 0 8 0 pdppl 4096 14934 0 14880 467 405 62 72 0 8 8 pvpl 32 2236363 0 2217281 477 291 186 335 0 265 0 pmappl 216 7463 0 7440 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2356 0 1590 38 14 24 38 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c85f) at panic+0x165 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1749 ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x1749 sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806963b2c8,ffff80002172c590,ffff80002172c5c0) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002172c560) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80002172c560) at namei+0x55a sys/kern/vfs_lookup.c:250 doreadlinkat(ffff8000ffff0b00,ffffff9c,200003c0,20000400,6c,ffff80002172c720) at doreadlinkat+0x81 sys/kern/vfs_syscalls.c:2165 syscall(ffff80002172c7a0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe30d8f951d0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279c85f) at panic+0x165 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1749 ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x1749 sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd806963b2c8,ffff80002172c590,ffff80002172c5c0) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002172c560) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80002172c560) at namei+0x55a sys/kern/vfs_lookup.c:250 doreadlinkat(ffff8000ffff0b00,ffffff9c,200003c0,20000400,6c,ffff80002172c720) at doreadlinkat+0x81 sys/kern/vfs_syscalls.c:2165 syscall(ffff80002172c7a0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe30d8f951d0, count: -9