panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *358790 655 0 0x1002000 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f0825) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009471798,ffff80002cceac98,ffff80002cceac30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8068769da0,ffff80003c938d20) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80003c938d20,fffffd8068a7e460) at unveil_add_vnode+0x168 sys/kern/kern_unveil.c:400 unveil_add(ffff80003c938d20,ffff80002cceae28,ffff80002cceaee3) at unveil_add+0x3e0 sys/kern/kern_unveil.c:494 sys_unveil(ffff80003c938d20,ffff80002cceb000,ffff80002cceaf50) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1032 syscall(ffff80002cceb000) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceb000) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36c25f87970, 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> 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(ffffffff832f0825) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009471798,ffff80002cceac98,ffff80002cceac30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8068769da0,ffff80003c938d20) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80003c938d20,fffffd8068a7e460) at unveil_add_vnode+0x168 sys/kern/kern_unveil.c:400 unveil_add(ffff80003c938d20,ffff80002cceae28,ffff80002cceaee3) at unveil_add+0x3e0 sys/kern/kern_unveil.c:494 sys_unveil(ffff80003c938d20,ffff80002cceb000,ffff80002cceaf50) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1032 syscall(ffff80002cceb000) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceb000) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36c25f87970, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002cceaa20 rbx 0 rdx 0xffff800001548e00 rcx 0 rax 0xffff80003c938d20 r8 0x101010101010101 r9 0x8080808080808080 r10 0xef73997335449139 r11 0xd8ab359cb1b1444 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff827f40f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002cceaa10 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=358790 pid=655 tcnt=2 stat=onproc flags process=1002000 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c938d20 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c938558,0xffff80003c939a28 process=0xffff8000318f8d98 user=0xffff80002cce6000, vmspace=0xfffffd806c94b018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 35317 265278 79595 0 2 0 syz-executor 35317 367034 79595 0 2 0x4000000 syz-executor 655 37074 91714 0 4 0x1082000 syz-executor * 655 358790 91714 0 7 0x5002000 syz-executor 1699 514850 63425 0 2 0 syz-executor 1699 351751 63425 0 3 0x4000080 fsleep syz-executor 19886 443874 41703 0 2 0 syz-executor 19886 440682 41703 0 3 0x4000080 fsleep syz-executor 21335 75293 29193 0 2 0xc80 syz-executor 21335 91476 29193 0 3 0x4000080 netcon syz-executor 21335 186909 29193 0 3 0x4000080 fsleep syz-executor 35386 222998 0 0 3 0x14200 acct acct 79595 113008 41652 0 3 0x82 nanoslp syz-executor 95783 486880 41652 0 2 0x10000882 syz-executor 9235 304959 41652 0 2 0x2 syz-executor 29193 498522 41652 0 2 0xc82 syz-executor 9859 76089 41652 0 3 0x82 nanoslp syz-executor 63425 17432 41652 0 3 0x82 nanoslp syz-executor 41703 520063 41652 0 2 0xc82 syz-executor 91714 492469 41652 0 2 0xc82 syz-executor 41652 118549 8695 0 3 0x82 kqread syz-executor 8695 352802 48704 0 3 0x10008a sigsusp ksh 48704 60007 80252 0 3 0x98 kqread sshd-session 80252 270693 81717 0 3 0x92 kqread sshd-session 48834 476257 1 0 3 0x100083 ttyopn getty 81717 301333 1 0 3 0x88 kqread sshd 25580 57852 89502 73 3 0x1100090 kqread syslogd 89502 18803 1 0 3 0x100082 sbwait syslogd 95056 319687 1 0 3 0x100080 kqread resolvd 21532 380724 18518 77 3 0x100092 kqread dhcpleased 66238 125549 18518 77 3 0x100092 kqread dhcpleased 18518 282124 1 0 3 0x80 kqread dhcpleased 35182 489818 0 0 3 0x14200 bored smr 35430 408439 0 0 2 0x14200 zerothread 49474 477337 0 0 3 0x14200 aiodoned aiodoned 93181 5602 0 0 3 0x14200 syncer update 31922 9214 0 0 3 0x14200 cleaner cleaner 5926 370963 0 0 3 0x14200 reaper reaper 18534 501680 0 0 3 0x14200 pgdaemon pagedaemon 62402 399495 0 0 3 0x14200 bored viomb 55535 352914 0 0 3 0x40014200 acpi0 acpi0 64292 385309 0 0 3 0x14200 bored softnet0 22483 340389 0 0 3 0x14200 bored systqmp 85504 309972 0 0 3 0x14200 bored systq 61287 295121 0 0 3 0x40014200 tmoslp softclock 18154 38724 0 0 3 0x40014200 idle0 1 197778 0 0 3 0x82 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 11050 12319K 12768K 166960K 13357 0 pcb 17 12K 12K 166960K 121 0 rtable 247 10K 12K 166960K 494 0 pf 40 15K 19K 166960K 253 0 ifaddr 44 8K 8K 166960K 94 0 ifgroup 55 2K 2K 166960K 141 0 sysctl 3 1K 9K 166960K 7 0 counters 35 18K 18K 166960K 92 0 ioctlops 0 0K 4K 166960K 224 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1350 85K 85K 166960K 1932 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 27 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 866 0 sigio 0 0K 0K 166960K 3 0 proc 63 67K 100K 166960K 489 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 51 0 in_multi 96 7K 7K 166960K 147 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 382 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 222 159K 172K 166960K 8893 0 UVM aobj 19 4K 5K 166960K 28 0 pinsyscall 37 74K 94K 166960K 1964 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 64 0 NDP 12 0K 2K 166960K 56 0 temp 42 8668K 8740K 166960K 56313 0 kqueue 14 22K 24K 166960K 68 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 64 0 61 1 0 1 1 0 8 0 rtentry 136 145 0 40 4 0 4 4 0 8 0 unpcb 144 179 0 164 1 0 1 1 0 8 0 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 5 0 5 1 1 0 1 0 8 0 tcpcb 736 129 0 119 3 1 2 2 0 8 1 arp 96 20 0 1 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 532 0 513 3 1 2 3 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 112 32 0 4 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 48 0 47 1 0 1 1 0 8 0 pppxif 1384 11 0 10 2 1 1 1 0 8 0 pfstscr 40 8 0 8 1 1 0 1 0 8 0 pfrktable 1344 19 0 18 1 0 1 1 0 8 0 pfsrclim 320 5 0 5 1 1 0 1 0 8 0 pfanchor 1288 9 0 5 1 0 1 1 0 8 0 pftag 88 6 0 2 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 15 0 5 1 0 1 1 0 8 0 pfstkey 128 49 0 38 1 0 1 1 0 8 0 pfstate 384 27 0 21 1 0 1 1 0 8 0 pfrule 1360 37 0 19 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 673 0 242 31 1 30 31 0 8 2 art_table 40 675 0 242 5 0 5 5 0 8 0 art_node 32 145 0 53 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 7 2 1 1 1 0 8 1 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 24 0 9 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2687 0 1175 95 0 95 95 0 8 0 ffsino 256 2687 0 1175 95 0 95 95 0 8 0 nchpl 144 3693 0 2001 63 0 63 63 0 8 0 rtmask 32 14 0 14 2 1 1 1 0 8 1 vnodes 216 3145 0 0 175 0 175 175 0 8 0 namei 1024 10053 0 10050 3 2 1 2 0 8 0 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 808 1 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0 kstatmem 264 80 0 56 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 13407 0 13407 3 2 1 3 1 8 1 plimitpl 152 52 0 36 1 0 1 1 0 8 0 sigapl 424 1160 0 1117 6 0 6 6 0 8 0 knotepl 120 820406 0 820358 28 18 10 16 0 8 7 kqueuepl 184 157 0 146 1 0 1 1 0 8 0 pipepl 304 124 0 97 3 0 3 3 0 8 0 fdescpl 448 1146 0 1118 5 1 4 5 0 8 0 filepl 120 3976 0 3764 8 1 7 8 0 8 0 lockfpl 104 352 0 350 1 0 1 1 0 8 0 lockfspl 48 148 0 146 1 0 1 1 0 8 0 sessionpl 144 25 0 17 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 443 0 430 1 0 1 1 0 8 0 zombiepl 144 1119 0 1117 2 1 1 1 0 8 0 processpl 1152 1160 0 1117 4 0 4 4 0 8 0 procpl 664 1964 0 1915 6 0 6 6 0 8 0 sosppl 176 29 0 24 1 0 1 1 0 8 0 sockpl 552 780 0 743 4 0 4 4 0 8 0 mcl64k 65536 147 0 147 2 1 1 1 0 8 1 mcl16k 16384 88 0 88 2 1 1 1 0 8 1 mcl12k 12288 45 0 45 2 1 1 1 0 8 1 mcl9k 9216 11 0 11 1 1 0 1 0 8 0 mcl8k 8192 87 0 87 2 1 1 1 0 8 1 mcl4k 4096 3737 0 3684 16 8 8 15 0 8 0 mcl2k2 2112 8 0 8 1 1 0 1 0 8 0 mcl2k 2048 509 0 509 2 1 1 1 0 8 1 mtagpl 96 62 0 5 2 0 2 2 0 8 0 mbufpl 256 14132 0 13846 75 56 19 74 0 8 0 bufpl 280 4252 0 125 295 0 295 295 0 8 0 anonpl 24 192364 0 180289 101 1 100 101 0 187 1 amapchunkpl 152 28244 0 27709 31 3 28 31 0 158 3 amappl16 200 4473 0 3990 38 0 38 38 0 8 0 amappl14 184 25 0 25 1 1 0 1 0 8 0 amappl13 176 407 0 406 1 0 1 1 0 8 0 amappl12 168 1501 0 1464 2 0 2 2 0 8 0 amappl11 160 1 0 1 1 1 0 1 0 8 0 amappl10 152 45 0 35 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 35 0 31 1 0 1 1 0 8 0 amappl7 128 77 0 76 1 0 1 1 0 8 0 amappl6 120 273 0 262 1 0 1 1 0 8 0 amappl5 112 76 0 68 1 0 1 1 0 8 0 amappl4 104 407 0 382 1 0 1 1 0 8 0 amappl3 96 5088 0 5013 3 0 3 3 0 8 0 amappl2 88 1283 0 1217 2 0 2 2 0 8 0 amappl1 80 12887 0 12353 13 1 12 13 0 8 0 amappl 88 8110 0 7957 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma8192 8192 4 0 4 1 1 0 1 0 8 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 8 0 8 1 1 0 1 0 8 0 dma128 128 254 0 254 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 27 0 9 1 0 1 1 0 8 0 uaddrrnd 24 1146 0 1118 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1146 0 1118 1 0 1 1 0 8 0 vmmpekpl 168 9488 0 9455 2 0 2 2 0 8 0 vmmpepl 168 79458 0 77280 114 4 110 114 0 357 4 vmsppl 368 1145 0 1118 4 1 3 4 0 8 0 rwobjpl 40 23162 0 21759 18 0 18 18 0 8 0 pdppl 4096 2300 0 2237 98 31 67 82 0 8 4 pvpl 32 534942 0 517334 195 12 183 195 0 265 3 pmappl 216 1146 0 1118 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 446 0 109 12 0 12 12 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(ffffffff832f0825) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009471798,ffff80002cceac98,ffff80002cceac30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8068769da0,ffff80003c938d20) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80003c938d20,fffffd8068a7e460) at unveil_add_vnode+0x168 sys/kern/kern_unveil.c:400 unveil_add(ffff80003c938d20,ffff80002cceae28,ffff80002cceaee3) at unveil_add+0x3e0 sys/kern/kern_unveil.c:494 sys_unveil(ffff80003c938d20,ffff80002cceb000,ffff80002cceaf50) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1032 syscall(ffff80002cceb000) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceb000) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36c25f87970, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832f0825) at panic+0x1cf sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eca VOP_LOOKUP(fffffd8009471798,ffff80002cceac98,ffff80002cceac30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8068769da0,ffff80003c938d20) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80003c938d20,fffffd8068a7e460) at unveil_add_vnode+0x168 sys/kern/kern_unveil.c:400 unveil_add(ffff80003c938d20,ffff80002cceae28,ffff80002cceaee3) at unveil_add+0x3e0 sys/kern/kern_unveil.c:494 sys_unveil(ffff80003c938d20,ffff80002cceb000,ffff80002cceaf50) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1032 syscall(ffff80002cceb000) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceb000) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x36c25f87970, count: -10