panic: bad dir Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *443934 44590 0 0 0x4000000 0K syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827dc08e) at panic+0x17b sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd8064a54a70,ffff800030d2fed8,ffff800030d2ff08) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800030d2fea8) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800030d2fea8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800030d2fea8,201,80) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a28d2b8,ffffff9c,200000c0,200,82,ffff800030d30080) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff800030d30100) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6423daa2540, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: bad dir ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827dc08e) at panic+0x17b sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd8064a54a70,ffff800030d2fed8,ffff800030d2ff08) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800030d2fea8) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800030d2fea8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800030d2fea8,201,80) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a28d2b8,ffffff9c,200000c0,200,82,ffff800030d30080) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff800030d30100) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6423daa2540, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800030d2f960 rbx 0xffffffff82c15ba7 cpu_info_full_primary+0x2ba7 rdx 0xffff800000d5d300 rcx 0xffff80002a28d2b8 rax 0xffffffff82c14ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6ec2b4f857641658 r11 0x19835e38e055f256 r12 0xffffffff82c159a8 cpu_info_full_primary+0x29a8 r13 0 r14 0 r15 0x1 rip 0xffffffff81737dbc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800030d2f950 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) tid=443934 pid=44590 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a28eaa0,0xffff80002a28e2b8 process=0xffff8000374ad520 user=0xffff800030d2b000, vmspace=0xfffffd805c437648 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44590 401349 16530 0 2 0 syz-executor.0 *44590 443934 16530 0 7 0x4000000 syz-executor.0 70561 64697 73655 0 2 0 syz-executor.6 70561 489346 73655 0 3 0x4000080 fsleep syz-executor.6 70561 301491 73655 0 2 0x4000000 syz-executor.6 90116 375896 39052 0 2 0 syz-executor.2 90116 342036 39052 0 3 0x4000080 fsleep syz-executor.2 1039 19819 95387 0 2 0x81000 syz-executor.3 1039 10982 95387 0 3 0x4003000 suspend syz-executor.3 90137 200416 71835 0 2 0 syz-executor.4 90137 385153 71835 0 3 0x4000080 fsleep syz-executor.4 58445 501146 78296 0 2 0 syz-executor.7 58445 514049 78296 0 3 0x4000080 fsleep syz-executor.7 18692 496862 45920 0 2 0 syz-executor.5 18692 517507 45920 0 3 0x4000080 fsleep syz-executor.5 18692 143026 45920 0 2 0x4000000 syz-executor.5 45920 461611 37630 0 3 0x82 nanoslp syz-executor.5 71835 207778 37630 0 3 0x82 nanoslp syz-executor.4 73655 66548 37630 0 3 0x82 nanoslp syz-executor.6 16530 480369 37630 0 3 0x82 nanoslp syz-executor.0 78296 273266 37630 0 3 0x82 nanoslp syz-executor.7 12965 424701 37630 0 2 0x2 syz-executor.1 39052 55834 37630 0 3 0x82 nanoslp syz-executor.2 95387 98111 37630 0 3 0x82 nanoslp syz-executor.3 24151 279973 0 0 3 0x14200 bored sosplice 37630 45826 92344 0 3 0x2000082 thrsleep syz-fuzzer 37630 92815 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 160001 92344 0 3 0x6000082 wait syz-fuzzer 37630 288472 92344 0 3 0x6000082 wait syz-fuzzer 37630 499099 92344 0 3 0x6000082 wait syz-fuzzer 37630 200255 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 326194 92344 0 3 0x6000082 wait syz-fuzzer 37630 491392 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 504868 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 170702 92344 0 3 0x6000082 kqread syz-fuzzer 37630 140407 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 266153 92344 0 3 0x6000082 wait syz-fuzzer 37630 23645 92344 0 3 0x6000082 thrsleep syz-fuzzer 37630 113648 92344 0 3 0x6000082 wait syz-fuzzer 37630 425210 92344 0 3 0x6000082 wait syz-fuzzer 37630 498054 92344 0 3 0x6000082 wait syz-fuzzer 92344 260334 30198 0 3 0x10008a sigsusp ksh 30198 472558 17724 0 3 0x9a kqread sshd 50239 106977 1 0 3 0x100083 ttyin getty 17724 31617 1 0 3 0x88 kqread sshd 87762 465784 11060 74 3 0x1100092 bpf pflogd 11060 366821 1 0 3 0x80 netio pflogd 49687 347883 83277 73 3 0x1100090 kqread syslogd 83277 240443 1 0 3 0x100082 netio syslogd 71277 499239 1 0 3 0x100080 kqread resolvd 82828 3433 42193 77 3 0x100092 kqread dhcpleased 45882 413724 42193 77 3 0x100092 kqread dhcpleased 42193 48230 1 0 3 0x80 kqread dhcpleased 60246 130491 0 0 3 0x14200 bored smr 36329 202599 0 0 2 0x14200 zerothread 65812 348847 0 0 3 0x14200 aiodoned aiodoned 72256 394887 0 0 3 0x14200 syncer update 93998 303510 0 0 3 0x14200 cleaner cleaner 3663 260084 0 0 3 0x14200 reaper reaper 40671 300795 0 0 3 0x14200 pgdaemon pagedaemon 46820 412791 0 0 3 0x14200 bored viomb 32474 511756 0 0 3 0x40014200 acpi0 acpi0 48334 25294 0 0 7 0x40014200 idle1 21146 377807 0 0 3 0x14200 bored softnet3 54834 109817 0 0 3 0x14200 bored softnet2 77343 84577 0 0 3 0x14200 bored softnet1 91284 217069 0 0 3 0x14200 bored softnet0 72583 86168 0 0 3 0x14200 bored systqmp 88614 520402 0 0 3 0x14200 bored systq 15283 446958 0 0 3 0x14200 tmoslp softclockmp 15198 313687 0 0 3 0x40014200 tmoslp softclock 50831 413894 0 0 3 0x40014200 idle0 1 508043 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 44590 (syz-executor.0) thread 0xffff80002a28d2b8 (443934) Process 70561 (syz-executor.6) thread 0xffff80002a28ed48 (301491) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 6579K 15144K 166960K 41197 0 pcb 13 20K 22K 166960K 1616 0 rtable 239 7K 7K 166960K 3282 0 pf 35 10K 10K 166960K 527 0 ifaddr 46 17K 17K 166960K 409 0 ifgroup 60 2K 2K 166960K 825 0 sysctl 4 1K 2K 166960K 15 0 counters 66 36K 36K 166960K 494 0 ioctlops 0 0K 4K 166960K 2857 0 iov 0 0K 34K 166960K 2508 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1564 98K 98K 166960K 13746 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 392 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 2603 0 dirhash 12 2K 2K 166960K 96 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 85K 166960K 22963 0 sigio 0 0K 0K 166960K 617 0 proc 73 91K 115K 166960K 2817 0 subproc 104 6K 6K 166960K 714 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1122 0 in_multi 99 7K 7K 166960K 804 0 ether_multi 1 0K 0K 166960K 20 0 mrt 1 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 5296 0 pfkey data 0 0K 0K 166960K 1 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 578 391K 391K 166960K 218299 0 UVM aobj 131 4K 4K 166960K 134 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 708 0 NDP 13 0K 1K 166960K 335 0 temp 76 5936K 137004K 166960K 142122 0 kqueue 12 18K 26K 166960K 1593 0 SYN cache 2 36K 44K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 1545 0 1541 26 25 1 3 0 8 0 rtentry 112 909 0 798 8 4 4 4 0 8 0 unpcb 144 19236 0 19219 177 171 6 10 0 8 5 syncache 312 227 0 227 44 43 1 1 0 8 1 sackhl 24 1 33 1 1 1 0 1 0 8 0 tcpqe 32 341 0 341 35 35 0 1 0 8 0 tcpcb 808 29633 0 29623 379 374 5 21 0 8 3 arp 120 140 0 122 1 0 1 1 0 8 0 ipq 40 6 0 6 2 2 0 1 0 8 0 ipqe 40 18 0 18 2 2 0 1 0 8 0 inpcb 368 38518 0 38504 367 362 5 23 0 8 3 nd6 136 176 0 151 1 0 1 1 0 8 0 pkpcb 40 103 0 103 11 11 0 1 0 8 0 kcovpl 48 54 0 46 1 0 1 1 0 8 0 ppxss 1256 72 0 72 18 17 1 1 0 8 1 pffrag 232 66 0 63 5 4 1 1 0 482 0 pffrnode 88 65 0 62 5 4 1 1 0 8 0 pffrent 40 347 0 344 5 4 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 24 625 0 609 1 0 1 1 0 8 0 pfstkey 128 625 0 609 4 2 2 2 0 8 0 pfstate 376 625 0 609 18 14 4 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2677 0 2211 60 30 30 30 0 8 0 art_table 32 2678 0 2211 5 1 4 4 0 8 0 art_node 16 701 0 600 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 27 1 0 1 1 0 8 0 semupl 112 6 0 6 2 2 0 1 0 8 0 semapl 112 2600 0 2590 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 73 0 56 3 0 3 3 0 8 0 dino2pl 256 32484 0 30981 95 0 95 95 0 8 0 ffsino 272 32484 0 30981 101 0 101 101 0 8 0 nchpl 144 63781 0 62132 64 1 63 64 0 8 0 uvmvnodes 80 7202 0 0 147 0 147 147 0 8 0 vnodes 216 7202 0 0 401 0 401 401 0 8 0 namei 1024 213650 0 213649 20 19 1 2 0 8 0 percpumem 16 261 0 214 1 0 1 1 0 8 0 vcpupl 2048 249 0 0 32 0 32 32 0 8 0 vmpool 696 301 0 52 23 0 23 23 0 8 0 kstatmem 264 454 0 428 2 0 2 2 0 8 0 scxspl 216 199343 0 199343 31 30 1 8 1 8 1 plimitpl 152 2169 0 2153 1 0 1 1 0 8 0 sigapl 424 23267 0 23218 11 3 8 8 0 8 1 futexpl 64 219596 0 219591 9 8 1 1 0 8 0 knotepl 120 1362 0 0 24 7 17 19 0 8 0 kqueuepl 216 4352 0 4344 97 96 1 8 0 8 0 pipepl 320 4791 0 4763 146 141 5 13 0 8 2 fdescpl 496 23178 0 23148 6 2 4 5 0 8 0 filepl 152 161395 0 161146 287 272 15 23 0 8 3 lockfpl 104 6332 0 6330 15 14 1 2 0 8 0 lockfspl 48 2540 0 2538 1 0 1 1 0 8 0 sessionpl 144 70 0 53 1 0 1 1 0 8 0 pgrppl 48 343 0 326 1 0 1 1 0 8 0 ucredpl 104 21955 0 21930 1 0 1 1 0 8 0 zombiepl 144 23219 0 23218 6 5 1 1 0 8 0 processpl 1072 23267 0 23218 7 2 5 5 0 8 0 procpl 680 59621 0 59548 26 17 9 10 0 8 1 srpgc 96 62 0 62 21 21 0 1 0 8 0 sosppl 168 325 0 325 25 24 1 1 0 8 1 sockpl 488 59783 0 59745 962 947 15 39 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 32 0 0 3 1 2 3 0 8 0 mcl12k 12288 24 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 19 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 418 0 0 40 15 25 40 0 8 0 mtagpl 96 659 0 0 8 3 5 7 0 8 0 mbufpl 256 1896 0 0 70 0 70 70 0 8 0 bufpl 288 40588 0 33328 519 0 519 519 0 8 0 anonpl 24 2363578 0 2349840 380 266 114 164 0 186 4 amapchunkpl 152 707339 0 706413 226 187 39 70 0 158 0 amappl16 200 50507 0 49997 267 230 37 53 0 8 8 amappl15 192 35 0 34 1 0 1 1 0 8 0 amappl14 184 307 0 293 2 1 1 2 0 8 0 amappl13 176 23 0 22 1 0 1 1 0 8 0 amappl12 168 24575 0 24539 3 1 2 2 0 8 0 amappl11 160 60 0 45 1 0 1 1 0 8 0 amappl10 152 92 0 77 1 0 1 1 0 8 0 amappl9 144 356 0 356 36 35 1 1 0 8 1 amappl8 136 874 0 710 7 1 6 6 0 8 0 amappl7 128 363 0 336 2 0 2 2 0 8 0 amappl6 120 1229 0 1208 1 0 1 1 0 8 0 amappl5 112 530 0 519 1 0 1 1 0 8 0 amappl4 104 1092 0 1038 3 1 2 2 0 8 0 amappl3 96 135494 0 135392 5 2 3 4 0 8 0 amappl2 88 24520 0 24438 3 1 2 3 0 8 0 amappl1 80 93671 0 93107 23 10 13 23 0 8 0 amappl 88 216661 0 216362 12 4 8 8 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 23479 0 23200 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23479 0 23200 2 0 2 2 0 8 0 vmmpekpl 168 146043 0 145938 5 0 5 5 0 8 0 vmmpepl 168 1360276 0 1357398 464 311 153 163 0 357 7 vmsppl 464 23478 0 23200 36 1 35 35 0 8 0 rwobjpl 56 326683 0 317552 166 33 133 133 0 8 3 pdppl 4096 46965 0 46649 1030 712 318 318 0 8 2 pvpl 32 41069 0 0 333 1 332 332 0 265 0 pmappl 248 23478 0 23200 19 1 18 18 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2820 0 1592 36 0 36 36 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827dc08e) at panic+0x17b sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x174c ufs_dirbad sys/ufs/ufs/ufs_lookup.c:609 [inline] ufs_lookup() at ufs_lookup+0x174c sys/ufs/ufs/ufs_lookup.c:444 VOP_LOOKUP(fffffd8064a54a70,ffff800030d2fed8,ffff800030d2ff08) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800030d2fea8) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800030d2fea8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800030d2fea8,201,80) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a28d2b8,ffffff9c,200000c0,200,82,ffff800030d30080) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff800030d30100) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6423daa2540, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5