panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *457255 6015 0 0 0x4000000 0 syz-executor 18150 57751 0 0x2 0x1 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8338d6e6) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff8000387e46f8,ffff8000387e46f8,72d08ccc7716c1b1) at ufs_dirbadentry VOP_LOOKUP(fffffd800b0336c0,ffff8000387e4970,ffff8000387e49a0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000387e4940) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000387e4940) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff8000ffff1738,ffffff9c,200000000000,2000,70b) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 syscall(ffff8000387e4b40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387e4b40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1155a474c10, 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(ffffffff8338d6e6) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff8000387e46f8,ffff8000387e46f8,72d08ccc7716c1b1) at ufs_dirbadentry VOP_LOOKUP(fffffd800b0336c0,ffff8000387e4970,ffff8000387e49a0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000387e4940) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000387e4940) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff8000ffff1738,ffffff9c,200000000000,2000,70b) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 syscall(ffff8000387e4b40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387e4b40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1155a474c10, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000387e4520 rbx 0xffffffff8386edd7 cpu_info_full_primary+0x2dd7 rdx 0xffff8000014821c0 rcx 0xffff8000ffff1738 rax 0xffffffff8386dff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb408dd31673fca42 r11 0x1ec43da46443d4de r12 0xffffffff8386ebd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff8162de55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000387e4510 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=457255 pid=6015 tcnt=3 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=0xffff8000ffff0028,0xffff8000ffff1c68 process=0xffff8000fffee6d8 user=0xffff8000387df000, vmspace=0xfffffd806c1fd798 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78744 372045 57751 0 3 0x3000 suspend syz-executor 78744 30442 57751 0 2 0x4081000 syz-executor 78744 518581 57751 0 2 0x4081000 syz-executor 27174 510292 36722 0 2 0 syz-executor 27174 351547 36722 0 3 0x4000080 fsleep syz-executor 27174 258484 36722 0 2 0x4000000 syz-executor 6015 292617 64581 0 2 0 syz-executor * 6015 457255 64581 0 7 0x4000000 syz-executor 6015 299517 64581 0 3 0x4000080 fsleep syz-executor 73330 317108 33602 0 2 0xc80 syz-executor 73330 191422 33602 0 2 0x4000000 syz-executor 73330 72629 33602 0 3 0x4000080 fsleep syz-executor 24406 262776 29173 0 2 0xc80 syz-executor 24406 437758 29173 0 3 0x4000080 kqsel syz-executor 24406 510286 29173 0 3 0x4000080 fsleep syz-executor 21468 1097 0 0 3 0x14200 bored sosplice 15915 269186 39426 0 3 0x100082 sbwait arp 39426 286251 52541 0 3 0x10008a sigsusp sh 52541 371398 45151 0 3 0x82 wait syz-executor 36722 209192 45151 0 2 0x2 syz-executor 64581 31944 45151 0 2 0xc82 syz-executor 29173 423070 45151 0 2 0xc82 syz-executor 50614 401009 45151 0 2 0xc82 syz-executor 57751 18150 45151 0 7 0x3 syz-executor 1142 140276 45151 0 3 0x82 wait syz-executor 33602 112513 45151 0 2 0xc82 syz-executor 45151 319539 91098 0 3 0x82 kqread syz-executor 91098 249079 79065 0 3 0x10008a sigsusp ksh 79065 204038 61919 0 3 0x98 kqread sshd-session 61919 75669 81795 0 3 0x92 kqread sshd-session 94658 493401 1 0 3 0x100083 ttyin getty 81795 330580 1 0 3 0x88 kqread sshd 36210 34848 34501 74 3 0x1100092 bpf pflogd 34501 301626 1 0 3 0x80 sbwait pflogd 16388 267674 40741 73 3 0x1100090 kqread syslogd 40741 87918 1 0 3 0x100082 sbwait syslogd 50548 380015 1 0 3 0x100080 kqread resolvd 45185 458901 14454 77 3 0x100092 kqread dhcpleased 1359 232160 14454 77 3 0x100092 kqread dhcpleased 14454 90204 1 0 3 0x80 kqread dhcpleased 68742 382483 0 0 3 0x14200 bored smr 42939 351714 0 0 3 0x14200 pgzero zerothread 32097 111990 0 0 3 0x14200 aiodoned aiodoned 8419 410089 0 0 3 0x14200 syncer update 57973 448491 0 0 3 0x14200 cleaner cleaner 4670 246030 0 0 3 0x14200 reaper reaper 31162 199887 0 0 3 0x14200 pgdaemon pagedaemon 11467 278286 0 0 3 0x14200 bored viomb 1389 502678 0 0 3 0x40014200 acpi0 acpi0 21408 82667 0 0 3 0x40014200 idle1 82994 161965 0 0 3 0x14200 bored softnet3 82990 185174 0 0 3 0x14200 bored softnet2 57934 432227 0 0 3 0x14200 bored softnet1 44707 314517 0 0 3 0x14200 bored softnet0 57485 399941 0 0 3 0x14200 bored systqmp 13974 53038 0 0 3 0x14200 bored systq 998 394415 0 0 3 0x14200 tmoslp softclockmp 27639 216818 0 0 2 0x40014200 softclock 85129 353084 0 0 3 0x40014200 idle0 1 206995 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 6015 (syz-executor) thread 0xffff8000ffff1738 (457255) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a0d258) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2da sys/kern/kern_synch.c:366 #3 biowait+0xc1 sys/kern/vfs_bio.c:1245 #4 ffs_bufatoff+0x16f sys/ufs/ffs/ffs_subr.c:71 #5 ufs_lookup+0x548 sys/ufs/ufs/ufs_lookup.c:256 #6 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #7 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #8 namei+0x7aa sys/kern/vfs_lookup.c:250 #9 domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e451e20) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 73330 (syz-executor) thread 0xffff8000ffff0548 (191422) shared rwlock vmmaplk r = 0 (0xfffffd806c1fd2f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x36e sys/kern/kern_rwlock.c:397 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_write+0x120 sys/kern/spec_vnops.c:302 #5 VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 #6 vn_write+0x1d4 sys/kern/vfs_vnops.c:408 #7 dofilewritev+0x23c sys/kern/sys_generic.c:380 #8 sys_write+0xa2 sys/kern/sys_generic.c:300 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11088K 11415K 166960K 11464 0 pcb 17 13K 13K 166960K 48 0 rtable 178 5K 6K 166960K 341 0 pf 32 17K 18K 166960K 55 0 ifaddr 36 6K 7K 166960K 50 0 ifgroup 51 2K 2K 166960K 69 0 sysctl 2 1K 9K 166960K 8 0 counters 66 36K 37K 166960K 82 0 ioctlops 0 0K 4K 166960K 1500 0 iov 0 0K 0K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1346 85K 85K 166960K 1452 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 47 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 97K 166960K 243 0 sigio 0 0K 0K 166960K 5 0 proc 72 91K 140K 166960K 534 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7 0 in_multi 75 5K 6K 166960K 90 0 ether_multi 1 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 375 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 170K 180K 166960K 3912 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 45 90K 114K 166960K 1317 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 11 0K 1K 166960K 30 0 temp 39 8678K 8744K 166960K 6936 0 kqueue 13 20K 28K 166960K 56 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 40 0 36 1 0 1 1 0 8 0 rtentry 176 108 0 27 5 0 5 5 0 8 0 unpcb 144 88 0 70 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 27 0 23 1 0 1 1 0 8 0 arp 128 18 0 3 1 0 1 1 0 8 0 inpcb 328 174 0 167 4 0 4 4 0 8 3 nd6 144 22 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 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 1 0 1 1 0 1 1 0 8 1 pfstitem 24 20 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 0 1 0 1 1 0 8 0 pfstate 384 20 0 0 2 0 2 2 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 256 426 0 93 27 0 27 27 0 8 3 art_table 32 427 0 93 4 0 4 4 0 8 0 art_node 16 107 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 112 42 0 36 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1757 0 245 95 0 95 95 0 8 0 ffsino 288 1757 0 245 109 0 109 109 0 8 0 nchpl 144 2117 0 423 63 0 63 63 0 8 0 uvmvnodes 80 1904 0 0 39 0 39 39 0 8 0 vnodes 216 1904 0 0 106 0 106 106 0 8 0 namei 1024 6500 0 6499 1 0 1 1 0 8 0 percpumem 16 56 0 8 1 0 1 1 0 8 0 kstatmem 264 34 0 10 3 0 3 3 0 8 1 scxspl 216 6972 0 6972 4 0 4 4 1 8 4 plimitpl 152 41 0 24 1 0 1 1 0 8 0 sigapl 424 543 0 491 8 1 7 7 0 8 0 knotepl 120 512 0 0 16 0 16 16 0 8 0 kqueuepl 224 67 0 56 2 0 2 2 0 8 1 pipepl 336 114 0 87 3 0 3 3 0 8 0 fdescpl 520 524 0 491 3 0 3 3 0 8 0 filepl 160 2111 0 1888 12 0 12 12 0 8 2 lockfpl 104 32 0 30 1 0 1 1 0 8 0 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 165 0 152 1 0 1 1 0 8 0 zombiepl 144 494 0 491 1 0 1 1 0 8 0 processpl 1240 543 0 491 5 0 5 5 0 8 0 procpl 656 750 0 688 7 1 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 728 306 0 274 7 0 7 7 0 8 3 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 219 0 0 14 0 14 14 0 8 0 bufpl 280 2566 0 122 175 0 175 175 0 8 0 anonpl 32 6215 0 0 51 0 51 51 0 246 0 amapchunkpl 152 11064 0 10508 22 0 22 22 0 158 0 amappl16 200 1363 0 1186 12 2 10 10 0 8 0 amappl15 192 32 0 32 1 1 0 1 0 8 0 amappl14 184 125 0 112 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 1161 0 1126 4 1 3 3 0 8 1 amappl11 160 119 0 105 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 118 0 105 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 130 0 121 1 0 1 1 0 8 0 amappl4 104 312 0 290 1 0 1 1 0 8 0 amappl3 96 2003 0 1878 4 0 4 4 0 8 0 amappl2 88 623 0 559 2 0 2 2 0 8 0 amappl1 80 8737 0 8099 16 0 16 16 0 8 1 amappl 88 3225 0 3044 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 128 253 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 524 0 491 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 524 0 491 1 0 1 1 0 8 0 vmmpekpl 168 6055 0 6019 2 0 2 2 0 8 0 vmmpepl 168 39685 0 37458 97 0 97 97 0 357 0 vmsppl 480 523 0 491 5 0 5 5 0 8 0 rwobjpl 72 14885 0 11829 56 0 56 56 0 8 0 pdppl 4096 1055 0 982 99 26 73 87 0 8 0 pvpl 32 13426 0 0 110 1 109 109 0 265 0 pmappl 256 523 0 491 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 28 11 0 11 11 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(ffffffff8338d6e6) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_dirbadentry(ffff8000387e46f8,ffff8000387e46f8,72d08ccc7716c1b1) at ufs_dirbadentry VOP_LOOKUP(fffffd800b0336c0,ffff8000387e4970,ffff8000387e49a0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000387e4940) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000387e4940) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff8000ffff1738,ffffff9c,200000000000,2000,70b) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 syscall(ffff8000387e4b40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387e4b40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1155a474c10, count: -9 ddb{0}> machine ddbcpu 1