panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *153518 55168 60928 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f51b9) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd800946b798,ffff80003c914e40,ffff80003c914e70) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c914e10) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80003c914e10) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff80002f0f14d8,ffffff9c,200000000200,0,ffffffff,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2482 syscall(ffff80003c9150a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9150a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x10ad8abf920, 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(ffffffff832f51b9) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd800946b798,ffff80003c914e40,ffff80003c914e70) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c914e10) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80003c914e10) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff80002f0f14d8,ffffff9c,200000000200,0,ffffffff,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2482 syscall(ffff80003c9150a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9150a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x10ad8abf920, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c914ab0 rbx 0 rdx 0 rcx 0 rax 0xffff80002f0f14d8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xdb370bb5332ff46e r11 0xa13e0505c8e82cd4 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff814ab9a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c914aa0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=153518 pid=55168 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f0f0a78,0xffff80002f0f1a18 process=0xffff80003c9ab620 user=0xffff80003c910000, vmspace=0xfffffd806cb062f0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55168 223691 53082 60928 2 0x10 syz-executor *55168 153518 53082 60928 7 0x4000010 syz-executor 55168 246571 53082 60928 3 0x4000010 inode syz-executor 55168 149431 53082 60928 3 0x4000010 inode syz-executor 678 504007 10909 0 2 0 syz-executor 678 297892 10909 0 3 0x4000080 fsleep syz-executor 44732 471868 82659 -1 2 0x10 syz-executor 44732 38147 82659 -1 2 0x4000010 syz-executor 44732 410778 82659 -1 3 0x4000090 fsleep syz-executor 98614 165232 0 0 3 0x14200 acct acct 30996 16352 58940 0 2 0x10 syz-executor 30996 333837 58940 0 3 0x4000090 fsleep syz-executor 83311 429498 86569 0 3 0x80 nanoslp syz-executor 83311 16698 86569 0 3 0x4000080 ttyout syz-executor 83311 250457 86569 0 3 0x4000080 fsleep syz-executor 37727 198945 74666 60928 2 0xc90 syz-executor 37727 352309 74666 60928 3 0x4000090 rest syz-executor 37727 264166 74666 60928 3 0x4000090 fsleep syz-executor 86569 76598 2222 0 2 0xc82 syz-executor 35015 188759 0 0 3 0x14280 nfsidl nfsio 13181 177959 0 0 3 0x14280 nfsidl nfsio 4140 285303 0 0 3 0x14280 nfsidl nfsio 93171 431821 0 0 3 0x14280 nfsidl nfsio 83822 459 0 0 3 0x14280 nfsidl nfsio 45000 451481 0 0 3 0x14280 nfsidl nfsio 96555 126471 0 0 3 0x14280 nfsidl nfsio 69533 80995 0 0 3 0x14280 nfsidl nfsio 15506 86856 0 0 3 0x14280 nfsidl nfsio 68103 428049 0 0 3 0x14280 nfsidl nfsio 10382 71896 0 0 3 0x14280 nfsidl nfsio 31478 333317 0 0 3 0x14280 nfsidl nfsio 56741 503019 0 0 3 0x14280 nfsidl nfsio 81885 257831 0 0 3 0x14280 nfsidl nfsio 81268 242258 0 0 3 0x14280 nfsidl nfsio 71969 424936 0 0 3 0x14280 nfsidl nfsio 31804 459656 0 0 3 0x14280 nfsidl nfsio 3235 54067 0 0 3 0x14280 nfsidl nfsio 3556 80659 0 0 3 0x14280 nfsidl nfsio 32080 401569 0 0 3 0x14280 nfsidl nfsio 78791 412295 2222 0 3 0x82 piperd syz-executor 53082 108611 2222 0 3 0x82 nanoslp syz-executor 10909 502393 2222 0 2 0xc82 syz-executor 93167 518952 2222 0 2 0x2 syz-executor 82659 60593 2222 0 2 0xc82 syz-executor 58940 199208 2222 0 2 0xc82 syz-executor 74666 347467 2222 0 2 0xc82 syz-executor 2222 318801 85326 0 2 0x2 syz-executor 85326 373346 79781 0 3 0x10008a sigsusp ksh 79781 25967 4825 0 3 0x98 kqread sshd-session 4825 49630 97975 0 3 0x92 kqread sshd-session 72478 68369 1 0 3 0x100083 ttyin getty 97975 143487 1 0 3 0x88 kqread sshd 12670 66844 7222 73 3 0x1100090 kqread syslogd 7222 437791 1 0 3 0x100082 sbwait syslogd 45310 107810 1 0 3 0x100080 kqread resolvd 74149 212382 20763 77 3 0x100092 kqread dhcpleased 85730 524060 20763 77 3 0x100092 kqread dhcpleased 20763 183558 1 0 3 0x80 kqread dhcpleased 93756 135709 0 0 3 0x14200 bored smr 52432 239558 0 0 2 0x14200 zerothread 48575 339563 0 0 3 0x14200 aiodoned aiodoned 70395 445712 0 0 3 0x14200 syncer update 27042 420268 0 0 3 0x14200 cleaner cleaner 28010 492739 0 0 3 0x14200 reaper reaper 89045 357960 0 0 3 0x14200 pgdaemon pagedaemon 80155 299387 0 0 3 0x14200 bored viomb 84211 465393 0 0 3 0x40014200 acpi0 acpi0 80769 87453 0 0 3 0x14200 bored softnet0 79258 421636 0 0 3 0x14200 bored systqmp 1183 135249 0 0 3 0x14200 bored systq 69537 160900 0 0 3 0x40014200 tmoslp softclock 68946 13248 0 0 3 0x40014200 idle0 1 238851 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 10185 11119K 12254K 166960K 13178 0 pcb 17 16K 18K 166960K 416 0 rtable 206 9K 9K 166960K 489 0 pf 34 13K 15K 166960K 81 0 ifaddr 37 6K 7K 166960K 69 0 ifgroup 52 2K 2K 166960K 94 0 sysctl 1 1K 9K 166960K 9 0 counters 35 18K 18K 166960K 61 0 ioctlops 0 0K 4K 166960K 197 0 iov 0 0K 16K 166960K 163 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1491 94K 94K 166960K 2329 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 15 10K 10K 166960K 29 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 106K 166960K 871 0 sigio 0 0K 0K 166960K 80 0 proc 63 67K 124K 166960K 571 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 354 0 in_multi 77 5K 7K 166960K 144 0 ether_multi 1 0K 0K 166960K 16 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 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 520 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 150K 169K 166960K 9220 0 UVM aobj 28 2K 4K 166960K 34 0 pinsyscall 37 74K 96K 166960K 1978 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 12 0K 2K 166960K 46 0 temp 75 8672K 8745K 166960K 33726 0 kqueue 15 24K 28K 166960K 137 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 92 0 88 1 0 1 1 0 8 0 rtentry 136 137 0 57 4 0 4 4 0 8 0 unpcb 144 624 0 602 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 250 0 243 7 0 7 7 0 8 6 arp 96 22 0 7 1 0 1 1 0 8 0 ipq 40 6 0 0 1 0 1 1 0 8 0 ipqe 40 8 0 2 1 0 1 1 0 8 0 inpcb 328 1067 0 1056 12 2 10 12 0 8 8 ip6q 72 4 0 3 1 0 1 1 0 8 0 ip6af 40 8 0 6 1 0 1 1 0 8 0 nd6 112 31 0 13 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 25 0 23 1 0 1 1 0 8 0 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 632 0 274 31 0 31 31 0 8 6 art_table 40 635 0 274 5 0 5 5 0 8 0 art_node 32 137 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 24 0 11 1 0 1 1 0 8 0 shmpl 112 30 0 5 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3049 0 1543 95 0 95 95 0 8 0 ffsino 256 3049 0 1543 95 0 95 95 0 8 0 nchpl 144 4249 0 2553 64 0 64 64 0 8 1 rtmask 32 10 0 9 1 0 1 1 0 8 0 vnodes 216 3685 0 0 205 0 205 205 0 8 0 namei 1024 14817 0 14813 2 0 2 2 0 8 1 vmpool 800 1 0 1 1 0 1 1 0 8 1 kstatmem 264 56 0 32 2 0 2 2 0 8 0 scsiplug 72 5 0 5 1 0 1 1 0 8 1 scxspl 216 16260 0 16260 8 0 8 8 1 8 8 plimitpl 152 178 0 159 1 0 1 1 0 8 0 sigapl 424 1174 0 1112 8 0 8 8 0 8 0 knotepl 120 34200 0 34151 18 8 10 17 0 8 8 kqueuepl 184 267 0 254 3 0 3 3 0 8 2 pipepl 304 370 0 343 8 0 8 8 0 8 5 fdescpl 448 1140 0 1112 5 0 5 5 0 8 1 filepl 120 7816 0 7548 15 0 15 15 0 8 6 lockfpl 104 261 0 258 1 0 1 1 0 8 0 lockfspl 48 117 0 114 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 40 0 24 1 0 1 1 0 8 0 ucredpl 104 1241 0 1225 1 0 1 1 0 8 0 zombiepl 144 1112 0 1112 1 0 1 1 0 8 1 processpl 1152 1174 0 1112 5 0 5 5 0 8 0 procpl 664 2245 0 2172 7 0 7 7 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 1809 0 1772 18 7 11 15 0 8 7 mcl64k 65536 214 0 214 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 27 0 27 1 0 1 1 0 8 1 mcl4k 4096 3477 0 3425 13 0 13 13 0 8 5 mcl2k 2048 1310 0 1303 3 0 3 3 0 8 1 mtagpl 96 125 0 45 3 0 3 3 0 8 0 mbufpl 256 13196 0 12923 27 0 27 27 0 8 6 bufpl 280 5919 0 128 414 0 414 414 0 8 0 anonpl 24 201940 0 198850 57 0 57 57 0 187 25 amapchunkpl 152 31398 0 30936 33 0 33 33 0 158 13 amappl16 200 3443 0 3412 26 15 11 21 0 8 8 amappl15 192 41 0 41 1 0 1 1 0 8 1 amappl14 184 2 0 2 1 0 1 1 0 8 1 amappl13 176 428 0 427 1 0 1 1 0 8 0 amappl12 168 1495 0 1458 2 0 2 2 0 8 0 amappl11 160 18 0 18 1 0 1 1 0 8 1 amappl10 152 46 0 36 1 0 1 1 0 8 0 amappl9 144 279 0 279 1 0 1 1 0 8 1 amappl8 136 23 0 22 1 0 1 1 0 8 0 amappl7 128 99 0 98 1 0 1 1 0 8 0 amappl6 120 276 0 264 1 0 1 1 0 8 0 amappl5 112 72 0 64 1 0 1 1 0 8 0 amappl4 104 395 0 372 1 0 1 1 0 8 0 amappl3 96 6063 0 5962 4 0 4 4 0 8 1 amappl2 88 534 0 479 2 0 2 2 0 8 0 amappl1 80 12562 0 12026 13 0 13 13 0 8 0 amappl 88 8367 0 8210 5 0 5 5 0 92 0 uvmvnodes 80 120 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 dma4096 4096 2 0 2 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 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 33 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1140 0 1112 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1140 0 1112 1 0 1 1 0 8 0 vmmpekpl 168 10927 0 10887 2 0 2 2 0 8 0 vmmpepl 168 78549 0 76812 96 0 96 96 0 357 12 vmsppl 368 1139 0 1112 4 0 4 4 0 8 1 rwobjpl 40 22458 0 21474 14 0 14 14 0 8 1 pdppl 4096 2289 0 2226 103 36 67 83 0 8 4 pvpl 32 538674 0 530144 143 0 143 143 0 265 52 pmappl 216 1140 0 1113 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 399 0 36 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(ffffffff832f51b9) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd800946b798,ffff80003c914e40,ffff80003c914e70) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c914e10) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80003c914e10) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff80002f0f14d8,ffffff9c,200000000200,0,ffffffff,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2482 syscall(ffff80003c9150a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9150a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x10ad8abf920, 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(ffffffff832f51b9) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd800946b798,ffff80003c914e40,ffff80003c914e70) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c914e10) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80003c914e10) at namei+0x7ca sys/kern/vfs_lookup.c:250 dofchownat(ffff80002f0f14d8,ffffff9c,200000000200,0,ffffffff,0) at dofchownat+0xe7 sys/kern/vfs_syscalls.c:2482 syscall(ffff80003c9150a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9150a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x10ad8abf920, count: -9