panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 84489 92289 0 0 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83372aa7) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c4f9508,ffff80003c4f9508,828a167f45590a66) at ufs_dirbadentry VOP_LOOKUP(fffffd8009b33870,ffff80003c4f96d8,ffff80003c4f9708) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4f96a8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4f96a8) at namei+0x7aa sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c5114b0,ffffff9c,200000000300,0) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 syscall(ffff80003c4f9880) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f9880) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26da4a9d2f0, 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{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+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83372aa7) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c4f9508,ffff80003c4f9508,828a167f45590a66) at ufs_dirbadentry VOP_LOOKUP(fffffd8009b33870,ffff80003c4f96d8,ffff80003c4f9708) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4f96a8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4f96a8) at namei+0x7aa sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c5114b0,ffffff9c,200000000300,0) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 syscall(ffff80003c4f9880) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f9880) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26da4a9d2f0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4f9330 rbx 0xffffffff8385fdc7 cpu_info_full_primary+0x2dc7 rdx 0xffff80000145c8c0 rcx 0xffff80003c5114b0 rax 0xffffffff8385eff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3049b4deb7e29923 r11 0x2d65b7a9ed6f50a r12 0xffffffff8385fbc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff81132495 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4f9320 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=84489 pid=92289 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=0xffff80003c511740,0xffff80003c5119e0 process=0xffff80003c4dd718 user=0xffff80003c4f4000, vmspace=0xfffffd806bcb13b0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37750 217913 11256 0 2 0 syz-executor 37750 477890 11256 0 3 0x4000080 sbwait syz-executor 92289 489773 32348 0 2 0 syz-executor *92289 84489 32348 0 7 0x4000000 syz-executor 44837 309949 85703 0 2 0 syz-executor 44837 418905 85703 0 3 0x4000080 fsleep syz-executor 86355 390739 99856 0 2 0 syz-executor 86355 262330 99856 0 3 0x4000080 fsleep syz-executor 41095 344129 44022 0 3 0x80 nanoslp syz-executor 41095 299110 44022 0 3 0x4000080 lockf syz-executor 41095 449293 44022 0 3 0x4000080 fsleep syz-executor 97022 69133 16531 0 3 0x80 nanoslp syz-executor 97022 157819 16531 0 3 0x4000080 lockf syz-executor 97022 483241 16531 0 3 0x4000080 fsleep syz-executor 83599 393347 54070 0 3 0x80 nanoslp syz-executor 83599 420582 54070 0 3 0x4000080 kqread syz-executor 83599 316047 54070 0 3 0x4000080 fsleep syz-executor 54070 398731 46689 0 3 0x82 nanoslp syz-executor 94161 354401 46689 0 3 0x82 wait syz-executor 99283 209120 0 0 3 0x14200 acct acct 57531 169185 0 0 3 0x14200 bored sosplice 16531 260447 46689 0 3 0x82 nanoslp syz-executor 99856 109996 46689 0 3 0x82 nanoslp syz-executor 11256 40048 46689 0 3 0x82 nanoslp syz-executor 85703 62427 46689 0 3 0x82 nanoslp syz-executor 32348 177469 46689 0 3 0x82 nanoslp syz-executor 44022 134989 46689 0 3 0x82 nanoslp syz-executor 46689 236353 42611 0 3 0x82 kqread syz-executor 42611 348489 25263 0 3 0x10008a sigsusp ksh 25263 177035 77933 0 3 0x98 kqread sshd-session 77933 325581 76359 0 3 0x92 kqread sshd-session 74905 131194 1 0 3 0x100083 ttyin getty 76359 302623 1 0 3 0x88 kqread sshd 93767 19194 21426 74 3 0x1100092 bpf pflogd 21426 412768 1 0 3 0x80 sbwait pflogd 76308 73538 87173 73 3 0x1100090 kqread syslogd 87173 189007 1 0 3 0x100082 sbwait syslogd 81471 10527 1 0 3 0x100080 kqread resolvd 87775 243913 27802 77 3 0x100092 kqread dhcpleased 29164 131715 27802 77 3 0x100092 kqread dhcpleased 27802 117521 1 0 3 0x80 kqread dhcpleased 3132 517498 0 0 3 0x14200 bored smr 65674 241080 0 0 2 0x14200 zerothread 82814 233823 0 0 3 0x14200 aiodoned aiodoned 93703 25570 0 0 3 0x14200 syncer update 6630 360708 0 0 3 0x14200 cleaner cleaner 63290 103982 0 0 3 0x14200 reaper reaper 57056 145617 0 0 3 0x14200 pgdaemon pagedaemon 45500 129802 0 0 3 0x14200 bored viomb 33300 76503 0 0 3 0x40014200 acpi0 acpi0 44657 383872 0 0 7 0x40014200 idle1 8264 459620 0 0 3 0x14200 bored softnet3 36415 409169 0 0 3 0x14200 bored softnet2 91390 451892 0 0 3 0x14200 bored softnet1 59890 63051 0 0 3 0x14200 bored softnet0 80525 320924 0 0 3 0x14200 bored systqmp 93602 323185 0 0 3 0x14200 bored systq 44464 228699 0 0 3 0x14200 tmoslp softclockmp 62462 245965 0 0 3 0x40014200 tmoslp softclock 94474 404467 0 0 3 0x40014200 idle0 1 135821 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 92289 (syz-executor) thread 0xffff80003c5114b0 (84489) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838ece70) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:412 #4 biowait+0xc1 sys/kern/vfs_bio.c:1246 #5 ffs_bufatoff+0x16f sys/ufs/ffs/ffs_subr.c:71 #6 ufs_lookup+0x548 sys/ufs/ufs/ufs_lookup.c:256 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #9 namei+0x7aa sys/kern/vfs_lookup.c:250 #10 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #11 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e310dc0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10185 11021K 11409K 166960K 11713 0 pcb 18 16K 17K 166960K 193 0 rtable 130 6K 8K 166960K 464 0 pf 28 16K 22K 166960K 122 0 ifaddr 26 4K 7K 166960K 86 0 ifgroup 39 1K 2K 166960K 143 0 sysctl 4 1K 2K 166960K 7 0 counters 56 35K 36K 166960K 136 0 ioctlops 0 0K 4K 166960K 1619 0 iov 1 4K 16K 166960K 70 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1330 84K 85K 166960K 1888 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 13 10K 10K 166960K 96 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 806 0 sigio 0 0K 0K 166960K 12 0 proc 73 103K 140K 166960K 680 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 83 0 in_multi 45 3K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 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 559 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 170K 182K 166960K 8798 0 UVM aobj 19 2K 2K 166960K 21 0 pinsyscall 43 86K 103K 166960K 1934 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 30 0 NDP 8 0K 2K 166960K 60 0 temp 76 8692K 8948K 166960K 26761 0 kqueue 15 24K 28K 166960K 165 0 SYN cache 2 16K 16K 166960K 2 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 66 0 63 1 0 1 1 0 8 0 rtentry 168 143 0 91 5 0 5 5 0 8 0 unpcb 144 596 0 508 7 3 4 4 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 143 0 136 1 0 1 1 0 8 0 arp 120 23 0 13 1 0 1 1 0 8 0 inpcb 376 750 0 738 15 7 8 9 0 8 6 nd6 136 31 0 21 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 25 0 25 1 0 1 1 0 8 1 pppxif 1480 3 0 3 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 4 1 0 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 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 50 0 18 1 0 1 1 0 8 0 pfstkey 128 52 0 20 2 0 2 2 0 8 0 pfstate 376 51 0 19 5 0 5 5 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 596 0 368 29 5 24 29 0 8 4 art_table 32 598 0 368 4 0 4 4 0 8 0 art_node 16 142 0 96 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 2 1 1 1 0 8 0 semapl 112 90 0 79 1 0 1 1 0 8 0 shmpl 112 18 0 2 1 0 1 1 0 8 0 dirhash 1024 36 0 19 3 0 3 3 0 8 0 dino2pl 256 2922 0 1420 96 1 95 96 0 8 0 ffsino 280 2922 0 1420 109 0 109 109 0 8 0 nchpl 144 4056 0 3506 63 39 24 63 0 8 0 rtmask 32 5 0 5 2 1 1 1 0 8 1 uvmvnodes 80 3171 0 0 65 0 65 65 0 8 0 vnodes 216 3171 0 0 177 0 177 177 0 8 0 namei 1024 14645 0 14644 2 0 2 2 0 8 1 percpumem 16 82 0 40 1 0 1 1 0 8 0 kstatmem 264 78 0 62 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 14676 0 14676 10 8 2 8 1 8 2 plimitpl 152 186 0 168 1 0 1 1 0 8 0 sigapl 424 1096 0 1044 8 1 7 7 0 8 0 futexpl 64 10092 0 10087 1 0 1 1 0 8 0 knotepl 120 564 0 0 17 0 17 17 0 8 0 kqueuepl 216 251 0 240 1 0 1 1 0 8 0 pipepl 328 152 0 125 3 0 3 3 0 8 0 fdescpl 504 1076 0 1044 5 0 5 5 0 8 0 filepl 152 6771 0 6476 19 4 15 15 0 8 3 lockfpl 104 310 0 305 2 1 1 2 0 8 0 lockfspl 48 81 0 78 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 1097 0 1084 1 0 1 1 0 8 0 zombiepl 144 1045 0 1044 1 0 1 1 0 8 0 processpl 1176 1096 0 1044 5 0 5 5 0 8 0 procpl 656 2146 0 2084 7 1 6 6 0 8 0 srpgc 96 12 0 12 2 1 1 1 0 8 1 sosppl 168 6 0 6 1 0 1 1 0 8 1 sockpl 688 1423 0 1320 17 6 11 12 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 176 0 0 11 0 11 11 0 8 0 bufpl 280 4763 0 190 327 0 327 327 0 8 0 anonpl 24 176706 0 173267 69 5 64 68 0 184 30 amapchunkpl 152 28563 0 28018 27 0 27 27 0 158 4 amappl16 200 3326 0 3293 31 18 13 26 0 8 8 amappl15 192 48 0 48 1 1 0 1 0 8 0 amappl14 184 122 0 110 1 0 1 1 0 8 0 amappl13 176 14 0 14 1 1 0 1 0 8 0 amappl12 168 1748 0 1716 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 242 0 241 2 1 1 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 111 0 98 1 0 1 1 0 8 0 amappl6 120 199 0 195 1 0 1 1 0 8 0 amappl5 112 138 0 128 1 0 1 1 0 8 0 amappl4 104 323 0 304 1 0 1 1 0 8 0 amappl3 96 5588 0 5461 5 1 4 4 0 8 0 amappl2 88 662 0 598 2 0 2 2 0 8 0 amappl1 80 11084 0 10481 16 1 15 15 0 8 0 amappl 88 7939 0 7757 5 0 5 5 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 128 254 0 254 2 2 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 20 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1076 0 1044 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1076 0 1044 1 0 1 1 0 8 0 vmmpekpl 168 9694 0 9645 3 0 3 3 0 8 0 vmmpepl 168 73278 0 71220 109 4 105 109 0 357 10 vmsppl 456 1075 0 1044 6 1 5 5 0 8 0 rwobjpl 64 23988 0 19839 69 1 68 68 0 8 0 pdppl 4096 2160 0 2088 100 28 72 86 0 8 0 pvpl 32 19761 0 0 161 1 160 160 0 265 0 pmappl 248 1075 0 1044 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 276 0 39 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83372aa7) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff80003c4f9508,ffff80003c4f9508,828a167f45590a66) at ufs_dirbadentry VOP_LOOKUP(fffffd8009b33870,ffff80003c4f96d8,ffff80003c4f9708) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4f96a8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4f96a8) at namei+0x7aa sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c5114b0,ffffff9c,200000000300,0) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 syscall(ffff80003c4f9880) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4f9880) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26da4a9d2f0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5