panic: bad dir Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *195560 7361 0 0 0 0K syz-executor5473 285159 27159 0 0x2 0x480 1 syz-executor5473 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 ufs_dirbadentry(ffff800020bb9678,ffff800020bb9678,b5f95c3bdeec69ca) at ufs_dirbadentry VOP_LOOKUP(fffffd807efca640,ffff800020bb9720,ffff800020bb96e0) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 unveil_find_cover(fffffd806ec9bbc0,ffff800020b84970) at unveil_find_cover+0x139 sys/kern/kern_unveil.c:290 unveil_add_vnode() at unveil_add_vnode+0x221 sys/kern/kern_unveil.c:471 unveil_add(ffff800020b84970,ffff800020bb9ce8,ffff800020bb9db3) at unveil_add+0x273 sys/kern/kern_unveil.c:597 sys_unveil(ffff800020b84970,ffff800020bb9e28,ffff800020bb9e90) at sys_unveil+0x405 sys/kern/vfs_syscalls.c:937 syscall(ffff800020bb9f00) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb9f00) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,7f7ffffdf9d8,0,30656c69662f2e,3baafa94648) at Xsyscall+0x128 end trace frame: 0x0, 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 bad dir ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 ufs_dirbadentry(ffff800020bb9678,ffff800020bb9678,b5f95c3bdeec69ca) at ufs_dirbadentry VOP_LOOKUP(fffffd807efca640,ffff800020bb9720,ffff800020bb96e0) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 unveil_find_cover(fffffd806ec9bbc0,ffff800020b84970) at unveil_find_cover+0x139 sys/kern/kern_unveil.c:290 unveil_add_vnode() at unveil_add_vnode+0x221 sys/kern/kern_unveil.c:471 unveil_add(ffff800020b84970,ffff800020bb9ce8,ffff800020bb9db3) at unveil_add+0x273 sys/kern/kern_unveil.c:597 sys_unveil(ffff800020b84970,ffff800020bb9e28,ffff800020bb9e90) at sys_unveil+0x405 sys/kern/vfs_syscalls.c:937 syscall(ffff800020bb9f00) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb9f00) at syscall+0x552 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,7f7ffffdf9d8,0,30656c69662f2e,3baafa94648) at Xsyscall+0x128 end trace frame: 0x0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bb9490 rbx 0xffff800020bb9540 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81a425b3 kprintf+0x173 r9 0x1 r10 0xde9ae3120fd603b1 r11 0xbae544e210691a1c r12 0x3000000008 r13 0xffff800020bb94a0 r14 0x100 r15 0x1 rip 0xffffffff812575e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bb9480 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor5473) pid=195560 stat=onproc flags process=0 proc=0 pri=17, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020b85078,0xffffffff823445b0 process=0xffff800020b3b078 user=0xffff800020bb4000, vmspace=0xfffffd806f1cd008 estcpu=3, cpticks=11, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 7361 195560 27159 0 7 0 syz-executor5473 27159 285159 29228 0 7 0x482 syz-executor5473 29228 409869 31474 0 3 0x10008a pause ksh 31474 364571 14667 0 3 0x92 select sshd 78617 492566 1 0 3 0x100083 ttyin getty 14667 459718 1 0 3 0x80 select sshd 25232 87488 30864 74 3 0x100092 bpf pflogd 30864 118616 1 0 3 0x80 netio pflogd 92316 147242 46077 73 2 0x100090 syslogd 46077 118617 1 0 3 0x100082 netio syslogd 59888 76231 1 77 3 0x100090 poll dhclient 96737 516322 1 0 3 0x80 poll dhclient 79185 487767 0 0 3 0x14200 pgzero zerothread 27899 33126 0 0 3 0x14200 aiodoned aiodoned 6788 319596 0 0 3 0x14200 syncer update 4512 64297 0 0 3 0x14200 cleaner cleaner 17790 466310 0 0 3 0x14200 reaper reaper 99622 404291 0 0 3 0x14200 pgdaemon pagedaemon 26082 211113 0 0 3 0x14200 bored crynlk 66782 383542 0 0 3 0x14200 bored crypto 93992 188778 0 0 3 0x40014200 acpi0 acpi0 63904 23371 0 0 3 0x40014200 idle1 28543 209539 0 0 3 0x14200 bored softnet 22272 85459 0 0 3 0x14200 bored systqmp 79932 163234 0 0 3 0x14200 bored systq 29600 458283 0 0 3 0x40014200 bored softclock 71952 351582 0 0 3 0x40014200 idle0 70782 181936 0 0 3 0x14200 bored smr 1 93153 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 7361 (syz-executor5473) thread 0xffff800020b84970 (195560) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82374b68) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x38c sys/kern/sched_bsd.c:439 #3 sleep_finish+0x110 sys/kern/kern_synch.c:303 #4 sleep_finish_all+0x34 sleep_finish_timeout sys/kern/kern_synch.c:327 [inline] #4 sleep_finish_all+0x34 sys/kern/kern_synch.c:157 #5 tsleep+0x195 sys/kern/kern_synch.c:149 #6 biowait+0xa1 sys/kern/vfs_bio.c:1228 #7 ffs_bufatoff+0x14f sys/ufs/ffs/ffs_subr.c:71 #8 ufs_lookup+0x48d sys/ufs/ufs/ufs_lookup.c:258 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 unveil_find_cover+0x139 sys/kern/kern_unveil.c:290 #11 unveil_add_vnode+0x221 sys/kern/kern_unveil.c:471 #12 unveil_add+0x273 sys/kern/kern_unveil.c:597 #13 sys_unveil+0x405 sys/kern/vfs_syscalls.c:937 #14 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #14 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #15 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ed21d58) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rw_enter+0x414 sys/kern/kern_rwlock.c:278 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:407 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 unveil_find_cover+0x10d sys/kern/kern_unveil.c:286 #7 unveil_add_vnode+0x221 sys/kern/kern_unveil.c:471 #8 unveil_add+0x273 sys/kern/kern_unveil.c:597 #9 sys_unveil+0x405 sys/kern/vfs_syscalls.c:937 #10 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:99 [inline] #10 syscall+0x552 sys/arch/amd64/amd64/trap.c:574 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9450 6382K 6382K 78643K 10537 0 0 pcb 25 9K 9K 78643K 57 0 0 rtable 61 2K 2K 78643K 125 0 0 ifaddr 25 7K 7K 78643K 26 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1467 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1167 73K 73K 78643K 1173 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 54 70K 70K 78643K 281 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 179 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 55 3K 3K 78643K 767 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 4 0K 0K 78643K 4 0 0 temp 39 2712K 2776K 78643K 2811 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 29 0 23 1 0 1 1 0 8 0 plimitpl 152 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 8 0 1 1 0 1 1 0 8 0 pfstkey 112 8 0 1 1 0 1 1 0 8 0 pfstate 328 8 0 1 1 0 1 1 0 8 0 pfrule 1360 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 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1395 0 19 45 0 45 45 0 8 0 ffsino 272 1395 0 19 92 0 92 92 0 8 0 nchpl 144 1569 0 32 57 0 57 57 0 8 0 uvmvnodes 72 1405 0 0 26 0 26 26 0 8 0 vnodes 200 1405 0 0 74 0 74 74 0 8 0 namei 1024 3557 0 3556 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5533 0 5533 7 1 6 6 0 8 6 sigapl 432 206 0 193 2 0 2 2 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 134 0 127 2 1 1 1 0 8 0 fdescpl 488 207 0 193 3 1 2 3 0 8 0 filepl 152 960 0 912 2 0 2 2 0 8 0 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 48 3 0 3 1 1 0 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 193 0 193 2 1 1 1 0 8 1 processpl 840 222 0 193 4 0 4 4 0 8 0 procpl 600 222 0 193 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 74 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 97 0 0 6 0 6 6 0 8 0 bufpl 256 7023 0 2584 278 0 278 278 0 8 0 anonpl 16 23378 0 18060 24 2 22 22 0 125 0 amapchunkpl 152 570 0 517 3 0 3 3 0 158 0 amappl16 192 328 0 83 13 0 13 13 0 8 0 amappl14 176 16 0 15 2 1 1 1 0 8 0 amappl12 160 4 0 4 1 1 0 1 0 8 0 amappl11 152 48 0 30 1 0 1 1 0 8 0 amappl10 144 58 0 56 1 0 1 1 0 8 0 amappl9 136 419 0 418 1 0 1 1 0 8 0 amappl8 128 99 0 95 1 0 1 1 0 8 0 amappl7 120 19 0 17 1 0 1 1 0 8 0 amappl6 112 47 0 41 1 0 1 1 0 8 0 amappl5 104 126 0 113 1 0 1 1 0 8 0 amappl4 96 449 0 423 1 0 1 1 0 8 0 amappl3 88 106 0 101 1 0 1 1 0 8 0 amappl2 80 629 0 587 1 0 1 1 0 8 0 amappl1 72 13483 0 13064 15 5 10 15 0 8 0 amappl 72 429 0 406 1 0 1 1 0 75 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 207 0 193 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 207 0 193 1 0 1 1 0 8 0 vmmpekpl 168 5646 0 5627 2 0 2 2 0 8 0 vmmpepl 168 28102 0 27086 55 10 45 45 0 357 0 vmsppl 360 206 0 193 2 0 2 2 0 8 0 pdppl 4096 422 0 386 6 1 5 6 0 8 0 pvpl 32 88921 0 81837 61 3 58 58 0 265 0 pmappl 232 206 0 193 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 410 0 5 12 0 12 12 0 8 0