panic: bad dir Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *474544 5799 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bc5df) 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(fffffd8077f267f8,ffff80003794f848,ffff80003794f878) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003794f818) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80003794f818) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff80003794f818,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140 doopenat(ffff80002db7e2c0,ffffff9c,20000000,0,0,ffff80003794f9f0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff80003794fa60) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad94f890d60, 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> 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(ffffffff827bc5df) 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(fffffd8077f267f8,ffff80003794f848,ffff80003794f878) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003794f818) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80003794f818) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff80003794f818,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140 doopenat(ffff80002db7e2c0,ffffff9c,20000000,0,0,ffff80003794f9f0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff80003794fa60) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad94f890d60, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003794f2e0 rbx 0 rdx 0 rcx 0 rax 0xffff80002db7e2c0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x284b17a2892ce6f1 r11 0x12b4ae43869b4e7a r12 0 r13 0xfffffd806e763780 r14 0 r15 0x1 rip 0xffffffff820d6eac db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80003794f2d0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) tid=474544 pid=5799 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002db7ed60,0xffffffff82d5e9e8 process=0xffff80002a694fd0 user=0xffff80003794a000, vmspace=0xfffffd806f0a78a8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 5799 509101 87250 0 2 0 syz-executor.0 * 5799 474544 87250 0 7 0x4000000 syz-executor.0 56707 138558 30749 0 2 0 syz-executor.6 56707 362421 30749 0 3 0x4000080 fsleep syz-executor.6 52097 17952 56349 0 2 0 syz-executor.2 52097 131510 56349 0 3 0x4000080 fsleep syz-executor.2 49691 206160 96965 0 2 0 syz-executor.7 49691 89084 96965 0 3 0x4000080 fsleep syz-executor.7 36062 336437 7102 0 2 0 syz-executor.1 36062 379370 7102 0 3 0x4000080 fsleep syz-executor.1 51778 294567 1 0 3 0x100083 ttyin getty 51348 294890 99807 0 3 0x82 nanoslp syz-executor.5 31784 226954 99807 0 3 0x82 nanoslp syz-executor.3 56349 158385 99807 0 3 0x82 nanoslp syz-executor.2 87250 345995 99807 0 3 0x82 nanoslp syz-executor.0 96965 444204 99807 0 3 0x82 nanoslp syz-executor.7 30749 279393 99807 0 3 0x82 nanoslp syz-executor.6 7102 328726 99807 0 3 0x82 nanoslp syz-executor.1 566 301733 99807 0 3 0x82 nanoslp syz-executor.4 27169 97135 0 0 3 0x14200 bored sosplice 99807 32816 71911 0 3 0x2000082 thrsleep syz-fuzzer 99807 308527 71911 0 3 0x6000082 thrsleep syz-fuzzer 99807 249976 71911 0 3 0x6000082 thrsleep syz-fuzzer 99807 35707 71911 0 3 0x6000082 wait syz-fuzzer 99807 120172 71911 0 3 0x6000082 wait syz-fuzzer 99807 250186 71911 0 3 0x6000082 wait syz-fuzzer 99807 301623 71911 0 3 0x6000082 wait syz-fuzzer 99807 96646 71911 0 3 0x6000082 wait syz-fuzzer 99807 269420 71911 0 3 0x6000082 thrsleep syz-fuzzer 99807 99698 71911 0 3 0x6000082 thrsleep syz-fuzzer 99807 112672 71911 0 3 0x6000082 wait syz-fuzzer 99807 339776 71911 0 3 0x6000082 wait syz-fuzzer 99807 430902 71911 0 3 0x6000082 kqread syz-fuzzer 99807 94977 71911 0 3 0x6000082 wait syz-fuzzer 71911 370806 27413 0 3 0x10008a sigsusp ksh 27413 129482 78003 0 3 0x9a kqread sshd 78003 261737 1 0 3 0x88 kqread sshd 88022 27977 96046 73 3 0x1100090 kqread syslogd 96046 482730 1 0 3 0x100082 netio syslogd 76210 42667 1 0 3 0x100080 kqread resolvd 52421 52609 8150 77 3 0x100092 kqread dhcpleased 84617 178443 8150 77 3 0x100092 kqread dhcpleased 8150 59587 1 0 3 0x80 kqread dhcpleased 45379 450564 0 0 3 0x14200 bored smr 52200 38532 0 0 2 0x14200 zerothread 18092 336128 0 0 3 0x14200 aiodoned aiodoned 49591 430543 0 0 3 0x14200 syncer update 76348 456963 0 0 3 0x14200 cleaner cleaner 92356 377093 0 0 3 0x14200 reaper reaper 57957 508244 0 0 3 0x14200 pgdaemon pagedaemon 52139 319620 0 0 3 0x14200 bored viomb 73736 133476 0 0 3 0x40014200 acpi0 acpi0 93173 121423 0 0 3 0x14200 bored softnet3 41204 302670 0 0 3 0x14200 bored softnet2 77074 487411 0 0 3 0x14200 bored softnet1 69512 486652 0 0 3 0x14200 bored softnet0 79879 403560 0 0 3 0x14200 bored systqmp 80771 433941 0 0 3 0x14200 bored systq 93416 32455 0 0 3 0x40014200 tmoslp softclock 72846 370169 0 0 3 0x40014200 idle0 1 186224 0 0 3 0x80082 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 10227 6493K 8619K 166960K 42146 0 pcb 13 20K 23K 166960K 865 0 rtable 247 15K 16K 166960K 5855 0 pf 31 9K 9K 166960K 230 0 ifaddr 44 12K 12K 166960K 212 0 ifgroup 54 2K 2K 166960K 365 0 sysctl 4 1K 1K 166960K 8 0 counters 29 17K 17K 166960K 117 0 ioctlops 0 0K 2K 166960K 2698 0 iov 0 0K 32K 166960K 2336 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1669 104K 105K 166960K 13101 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 97 0 VM map 2 1K 1K 166960K 2 0 sem 11 1K 1K 166960K 12 0 dirhash 12 2K 4K 166960K 3009 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 69K 166960K 20575 0 sigio 0 0K 0K 166960K 224 0 proc 58 59K 75K 166960K 2847 0 subproc 104 6K 6K 166960K 419 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 8424 0 in_multi 99 7K 7K 166960K 499 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 307 1367K 1367K 166960K 307 0 exec 0 0K 1K 166960K 2448 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 446 327K 351K 166960K 191397 0 UVM aobj 131 4K 4K 166960K 137 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3734 0 NDP 12 0K 2K 166960K 164 0 temp 74 5916K 6296K 166960K 122141 0 kqueue 12 18K 30K 166960K 592 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 6273 0 6270 24 23 1 4 0 8 0 rtentry 112 409 0 297 5 1 4 4 0 8 0 unpcb 144 37432 0 37419 139 136 3 11 0 8 2 syncache 312 92 0 92 24 24 0 1 0 8 0 tcpqe 32 719 0 719 18 18 0 2 0 8 0 tcpcb 808 15167 0 15158 299 288 11 21 0 8 8 arp 88 71 0 53 1 0 1 1 0 8 0 ipq 40 11 0 11 6 6 0 1 0 8 0 ipqe 40 27 0 27 6 6 0 1 0 8 0 inpcb 336 18858 0 18846 294 284 10 18 0 8 8 nd6 104 101 0 75 1 0 1 1 0 8 0 pkpcb 40 137 0 137 10 10 0 1 0 8 0 kcovpl 48 32 0 24 1 0 1 1 0 8 0 ppxss 1160 32 0 32 8 8 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1545 0 1080 41 11 30 30 0 8 0 art_table 32 1546 0 1080 4 0 4 4 0 8 0 art_node 16 392 0 290 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 13 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 2015 0 1998 4 1 3 4 0 8 0 dino2pl 256 38497 0 36885 102 1 101 101 0 8 0 ffsino 240 38497 0 36885 97 1 96 96 0 8 0 nchpl 144 68596 0 68095 64 42 22 64 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 285842 0 285841 16 15 1 3 0 8 0 vcpupl 2048 173 0 4 22 0 22 22 0 8 0 vmpool 664 185 0 16 15 0 15 15 0 8 0 kstatmem 264 200 0 176 2 0 2 2 0 8 0 scxspl 216 223864 0 223864 33 32 1 8 1 8 1 plimitpl 152 1235 0 1220 1 0 1 1 0 8 0 sigapl 424 20842 0 20796 9 3 6 8 0 8 0 futexpl 64 300364 0 300360 7 6 1 1 0 8 0 knotepl 120 171760 0 171680 36 32 4 14 0 8 0 kqueuepl 184 1141 0 1133 11 10 1 7 0 8 0 pipepl 288 12927 0 12898 169 162 7 10 0 8 4 fdescpl 432 20803 0 20777 4 0 4 4 0 8 0 filepl 120 166649 0 166405 250 238 12 21 0 8 4 lockfpl 104 6562 0 6559 17 16 1 5 0 8 0 lockfspl 48 3024 0 3021 3 2 1 3 0 8 0 sessionpl 144 48 0 32 1 0 1 1 0 8 0 pgrppl 48 92 0 76 1 0 1 1 0 8 0 ucredpl 104 12179 0 12164 1 0 1 1 0 8 0 zombiepl 144 20799 0 20796 1 0 1 1 0 8 0 processpl 1008 20842 0 20796 10 4 6 9 0 8 0 procpl 680 52280 0 52216 25 18 7 9 0 8 0 sosppl 168 114 0 114 15 15 0 1 0 8 0 sockpl 456 62747 0 62716 1178 1164 14 50 0 8 8 mcl64k 65536 3139 0 3139 36 35 1 1 0 8 1 mcl16k 16384 368 0 368 44 43 1 1 0 8 1 mcl12k 12288 1234 0 1234 47 46 1 1 0 8 1 mcl9k 9216 234 0 234 40 39 1 1 0 8 1 mcl8k 8192 6479 0 6479 36 35 1 1 0 8 1 mcl4k 4096 3599 0 3599 27 26 1 1 0 8 1 mcl2k2 2112 154 0 154 50 49 1 1 0 8 1 mcl2k 2048 127817 0 127746 84 73 11 31 0 8 1 mtagpl 96 5252 0 4792 39 25 14 31 0 8 0 mbufpl 256 446703 0 446085 410 354 56 123 0 8 0 bufpl 288 36157 0 29760 458 0 458 458 0 8 0 anonpl 24 1852098 0 1837732 268 167 101 144 0 188 0 amapchunkpl 152 606949 0 606110 186 149 37 48 0 158 1 amappl16 200 33580 0 33055 128 100 28 44 0 8 0 amappl15 192 19 0 19 1 1 0 1 0 8 0 amappl14 184 225 0 213 2 1 1 2 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 21797 0 21769 2 0 2 2 0 8 0 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 84 0 75 2 1 1 1 0 8 0 amappl9 144 249 0 247 1 0 1 1 0 8 0 amappl8 136 490 0 396 7 3 4 4 0 8 0 amappl7 128 267 0 242 2 0 2 2 0 8 0 amappl6 120 787 0 772 1 0 1 1 0 8 0 amappl5 112 2885 0 2876 1 0 1 1 0 8 0 amappl4 104 791 0 766 2 1 1 2 0 8 0 amappl3 96 120456 0 120368 6 3 3 3 0 8 0 amappl2 88 23104 0 23031 3 1 2 3 0 8 0 amappl1 80 82324 0 81815 22 9 13 22 0 8 0 amappl 88 190454 0 190219 8 1 7 7 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 20988 0 20793 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20988 0 20793 2 0 2 2 0 8 0 vmmpekpl 168 171622 0 171539 6 1 5 5 0 8 0 vmmpepl 168 1198661 0 1196152 381 254 127 145 0 357 0 vmsppl 368 20987 0 20793 20 2 18 19 0 8 0 rwobjpl 24 276267 0 268626 48 0 48 48 0 8 0 pdppl 4096 41982 0 41755 971 737 234 234 0 8 7 pvpl 32 5777155 0 5757412 620 443 177 361 0 265 0 pmappl 216 20987 0 20793 17 6 11 12 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3183 0 2112 32 0 32 32 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(ffffffff827bc5df) 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(fffffd8077f267f8,ffff80003794f848,ffff80003794f878) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003794f818) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80003794f818) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff80003794f818,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140 doopenat(ffff80002db7e2c0,ffffff9c,20000000,0,0,ffff80003794f9f0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff80003794fa60) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad94f890d60, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bc5df) 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(fffffd8077f267f8,ffff80003794f848,ffff80003794f878) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003794f818) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff80003794f818) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff80003794f818,1,0) at vn_open+0xf8 sys/kern/vfs_vnops.c:140 doopenat(ffff80002db7e2c0,ffffff9c,20000000,0,0,ffff80003794f9f0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff80003794fa60) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad94f890d60, count: -10