panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *202742 98441 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e4ee4) at panic+0x165 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806d56f1e8,ffff80002a62ac00,4c,fffffd806d56f294,ffff800035c6abd0,0) at ufsdirhash_lookup+0x8a8 sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xba0 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd806442f000,ffff800035c6b048,ffff800035c6b078) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800035c6b018) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566 namei(ffff800035c6b018) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff800035c6b018,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff80002a649d58,4,20000240,200,0,ffff800035c6b1b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800035c6b260) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b444a2be10, count: 4 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: ufsdirhash_lookup: bad offset in hash array ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e4ee4) at panic+0x165 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806d56f1e8,ffff80002a62ac00,4c,fffffd806d56f294,ffff800035c6abd0,0) at ufsdirhash_lookup+0x8a8 sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xba0 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd806442f000,ffff800035c6b048,ffff800035c6b078) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800035c6b018) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566 namei(ffff800035c6b018) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff800035c6b018,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff80002a649d58,4,20000240,200,0,ffff800035c6b1b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800035c6b260) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b444a2be10, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800035c6a9f0 rbx 0xffff8000006baa00 rdx 0xffff800000dfb6c0 rcx 0 rax 0xffff80002a649d58 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9cb8a683dd186fb5 r11 0xe6c06b7ff4fc8e40 r12 0 r13 0xffff800000e35800 r14 0 r15 0x1 rip 0xffffffff811a086c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800035c6a9e0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) tid=202742 pid=98441 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a649ab0,0xffff80002a648828 process=0xffff800034429940 user=0xffff800035c66000, vmspace=0xfffffd8067a1e438 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 72066 97682 26969 0 2 0 syz-executor.5 72066 412429 26969 0 2 0x4000000 syz-executor.5 51997 376711 43342 -1 2 0x10 syz-executor.4 51997 16929 43342 -1 3 0x4000090 fsleep syz-executor.4 51997 316685 43342 -1 3 0x4000090 fsleep syz-executor.4 51997 9782 43342 -1 3 0x4000090 fsleep syz-executor.4 49202 15670 94730 0 2 0 syz-executor.6 49202 49699 94730 0 3 0x4000080 fsleep syz-executor.6 98441 392023 55011 0 2 0 syz-executor.1 *98441 202742 55011 0 7 0x4000000 syz-executor.1 56567 202267 76971 0 3 0x80 nanoslp syz-executor.0 56567 18065 76971 0 3 0x4000080 bell syz-executor.0 56567 328502 76971 0 3 0x4000080 fsleep syz-executor.0 50401 505629 80761 0 3 0x82 nanoslp syz-executor.3 26969 451736 80761 0 3 0x82 nanoslp syz-executor.5 94730 437708 80761 0 3 0x82 nanoslp syz-executor.6 92485 304086 80761 0 3 0x82 nanoslp syz-executor.2 67463 319226 0 0 3 0x14200 acct acct 43342 88501 80761 0 3 0x82 nanoslp syz-executor.4 82689 446736 1 0 3 0x18100083 ttyin getty 76971 250800 80761 0 3 0x82 nanoslp syz-executor.0 55011 276444 80761 0 3 0x82 nanoslp syz-executor.1 92907 362686 0 0 3 0x14200 bored sosplice 80761 88111 19208 0 3 0x1a000082 wait syz-fuzzer 80761 503402 19208 0 3 0x1e000082 nanoslp syz-fuzzer 80761 185131 19208 0 3 0x1e000082 kqread syz-fuzzer 80761 150033 19208 0 3 0x1e000082 thrsleep syz-fuzzer 80761 160218 19208 0 3 0x1e000082 thrsleep syz-fuzzer 80761 479867 19208 0 3 0x1e000082 thrsleep syz-fuzzer 80761 139668 19208 0 3 0x1e000082 wait syz-fuzzer 80761 205381 19208 0 3 0x1e000082 wait syz-fuzzer 80761 404784 19208 0 3 0x1e000082 thrsleep syz-fuzzer 80761 132960 19208 0 3 0x1e000082 thrsleep syz-fuzzer 80761 492070 19208 0 3 0x1e000082 wait syz-fuzzer 80761 21511 19208 0 3 0x1e000082 wait syz-fuzzer 80761 197073 19208 0 3 0x1e000082 wait syz-fuzzer 80761 289306 19208 0 3 0x1e000082 wait syz-fuzzer 19208 469723 63401 0 3 0x810008a sigsusp ksh 63401 178115 83976 0 3 0x1800009a kqread sshd 83976 105106 1 0 3 0x18000088 kqread sshd 93273 205039 54075 73 3 0x19100090 kqread syslogd 54075 360029 1 0 3 0x18100082 netio syslogd 23744 282496 1 0 3 0x18100080 kqread resolvd 91434 516558 37485 77 3 0x18100092 kqread dhcpleased 59579 263811 37485 77 3 0x18100092 kqread dhcpleased 37485 31635 1 0 3 0x18000080 kqread dhcpleased 45119 24533 0 0 3 0x14200 bored smr 5853 369084 0 0 2 0x14200 zerothread 72892 365433 0 0 3 0x14200 aiodoned aiodoned 70749 375457 0 0 3 0x14200 syncer update 95343 439635 0 0 3 0x14200 cleaner cleaner 77439 458288 0 0 3 0x14200 reaper reaper 58279 370875 0 0 3 0x14200 pgdaemon pagedaemon 62978 434575 0 0 3 0x14200 bored viomb 8364 402182 0 0 3 0x40014200 acpi0 acpi0 22905 165701 0 0 3 0x14200 bored softnet3 99562 336402 0 0 3 0x14200 bored softnet2 72594 359343 0 0 3 0x14200 bored softnet1 62442 251786 0 0 3 0x14200 bored softnet0 68440 469785 0 0 3 0x14200 bored systqmp 82121 416775 0 0 3 0x14200 bored systq 91640 412558 0 0 3 0x40014200 tmoslp softclock 72776 322445 0 0 3 0x40014200 idle0 1 509762 0 0 3 0x8000082 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 10201 6416K 8014K 166960K 35564 0 pcb 15 18K 20K 166960K 953 0 rtable 149 9K 11K 166960K 2762 0 pf 29 8K 10K 166960K 299 0 ifaddr 30 10K 13K 166960K 350 0 ifgroup 48 2K 2K 166960K 488 0 sysctl 4 1K 1K 166960K 8 0 counters 30 17K 18K 166960K 152 0 ioctlops 0 0K 2K 166960K 1056 0 iov 0 0K 32K 166960K 1430 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1779 112K 112K 166960K 9126 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 157 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 201 0 dirhash 84 15K 17K 166960K 11424 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 81K 166960K 12119 0 sigio 0 0K 0K 166960K 409 0 proc 58 59K 92K 166960K 2475 0 subproc 91 5K 6K 166960K 819 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1074 0 in_multi 54 3K 7K 166960K 763 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 2840 0 pfkey data 0 0K 0K 166960K 14 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 452 440K 449K 166960K 112169 0 UVM aobj 131 4K 4K 166960K 140 0 pinsyscall 22 44K 100K 166960K 3067 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 471 0 NDP 11 0K 2K 166960K 259 0 temp 70 6803K 7440K 166960K 98280 0 kqueue 12 18K 30K 166960K 1058 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 120 597 0 594 3 0 3 3 0 8 2 rtentry 112 943 0 880 4 0 4 4 0 8 1 unpcb 144 11493 0 11474 10 1 9 10 0 8 8 syncache 336 134 0 134 1 0 1 1 0 8 1 sackhl 24 1 0 1 1 0 1 1 0 8 1 tcpqe 32 172 0 172 1 0 1 1 0 8 1 tcpcb 808 3970 0 3956 15 6 9 11 0 8 7 arp 88 195 0 186 1 0 1 1 0 8 0 ipq 40 11 0 11 1 0 1 1 0 8 1 ipqe 40 98 0 98 1 0 1 1 0 8 1 inpcb 360 9575 0 9553 30 19 11 15 0 8 8 nd6 104 196 0 184 1 0 1 1 0 8 0 pkpcb 40 217 0 217 1 0 1 1 0 8 1 kcovpl 48 63 0 56 1 0 1 1 0 8 0 ppxss 1072 38 0 37 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3253 0 2970 61 32 29 29 0 8 5 art_table 32 3254 0 2970 4 0 4 4 0 8 0 art_node 16 930 0 873 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 35 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 193 0 183 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 3821 0 3780 6 0 6 6 0 8 0 dino2pl 256 17816 0 16263 98 0 98 98 0 8 0 ffsino 240 17816 0 16263 92 0 92 92 0 8 0 nchpl 144 34166 0 32442 66 0 66 66 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 118862 0 118861 2 0 2 2 0 8 1 vcpupl 2048 177 0 0 23 0 23 23 0 8 0 vmpool 664 211 0 34 15 0 15 15 0 8 0 kstatmem 264 266 0 244 3 0 3 3 0 8 0 scxspl 216 106096 0 106096 8 0 8 8 1 8 8 plimitpl 152 1552 0 1538 1 0 1 1 0 8 0 sigapl 424 12456 0 12411 8 0 8 8 0 8 1 futexpl 64 114487 0 114482 1 0 1 1 0 8 0 knotepl 120 105035 0 104959 20 9 11 18 0 8 8 kqueuepl 184 2524 0 2516 7 0 7 7 0 8 6 pipepl 288 2390 0 2365 7 0 7 7 0 8 4 fdescpl 432 12296 0 12271 4 0 4 4 0 8 0 filepl 120 80010 0 79782 24 7 17 19 0 8 8 lockfpl 104 4640 0 4638 2 0 2 2 0 8 1 lockfspl 48 1772 0 1770 1 0 1 1 0 8 0 sessionpl 144 80 0 65 1 0 1 1 0 8 0 pgrppl 48 351 0 336 1 0 1 1 0 8 0 ucredpl 104 11162 0 11151 1 0 1 1 0 8 0 zombiepl 144 12413 0 12411 1 0 1 1 0 8 0 processpl 1072 12456 0 12411 5 0 5 5 0 8 0 procpl 680 29814 0 29748 9 0 9 9 0 8 1 sosppl 168 118 0 118 1 0 1 1 0 8 1 sockpl 488 21900 0 21859 336 322 14 34 0 8 8 mcl64k 65536 612 0 612 1 0 1 1 0 8 1 mcl16k 16384 293 0 293 1 0 1 1 0 8 1 mcl12k 12288 751 0 751 1 0 1 1 0 8 1 mcl9k 9216 212 0 212 1 0 1 1 0 8 1 mcl8k 8192 846 0 846 1 0 1 1 0 8 1 mcl4k 4096 1261 0 1261 1 0 1 1 0 8 1 mcl2k2 2112 83 0 83 1 0 1 1 0 8 1 mcl2k 2048 98750 0 98693 34 18 16 29 0 8 7 mtagpl 96 2456 0 2079 16 0 16 16 0 8 1 mbufpl 256 273193 0 272712 284 232 52 81 0 8 5 bufpl 280 24015 0 17679 453 0 453 453 0 8 0 anonpl 24 1142074 0 1128154 112 0 112 112 0 188 16 amapchunkpl 152 365128 0 364277 49 0 49 49 0 158 12 amappl16 200 20524 0 20080 41 9 32 37 0 8 7 amappl15 192 88 0 87 1 0 1 1 0 8 0 amappl14 184 333 0 321 2 0 2 2 0 8 1 amappl13 176 34 0 32 1 0 1 1 0 8 0 amappl12 168 13797 0 13768 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 100 0 90 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 0 1 1 0 8 1 amappl8 136 581 0 484 4 0 4 4 0 8 0 amappl7 128 95 0 80 1 0 1 1 0 8 0 amappl6 120 1114 0 1093 2 0 2 2 0 8 1 amappl5 112 682 0 669 1 0 1 1 0 8 0 amappl4 104 1140 0 1109 2 0 2 2 0 8 1 amappl3 96 69980 0 69903 3 0 3 3 0 8 0 amappl2 88 13371 0 13301 4 0 4 4 0 8 1 amappl1 80 55302 0 54815 21 2 19 21 0 8 7 amappl 88 110495 0 110238 7 0 7 7 0 92 0 dma4096 4096 1 0 1 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 128 253 0 253 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 12507 0 12305 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12507 0 12305 2 0 2 2 0 8 0 vmmpekpl 168 85659 0 85568 5 0 5 5 0 8 0 vmmpepl 168 745741 0 743376 136 0 136 136 0 357 19 vmsppl 352 12506 0 12305 19 0 19 19 0 8 0 rwobjpl 24 173248 0 165698 48 0 48 48 0 8 0 pdppl 4096 25020 0 24787 885 648 237 243 0 8 4 pvpl 32 3435357 0 3415810 346 1 345 346 0 265 170 pmappl 216 12506 0 12305 12 0 12 12 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1525 0 936 18 0 18 18 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e4ee4) at panic+0x165 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806d56f1e8,ffff80002a62ac00,4c,fffffd806d56f294,ffff800035c6abd0,0) at ufsdirhash_lookup+0x8a8 sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xba0 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd806442f000,ffff800035c6b048,ffff800035c6b078) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800035c6b018) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566 namei(ffff800035c6b018) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff800035c6b018,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff80002a649d58,4,20000240,200,0,ffff800035c6b1b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800035c6b260) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b444a2be10, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e4ee4) at panic+0x165 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806d56f1e8,ffff80002a62ac00,4c,fffffd806d56f294,ffff800035c6abd0,0) at ufsdirhash_lookup+0x8a8 sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xba0 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd806442f000,ffff800035c6b048,ffff800035c6b078) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800035c6b018) at vfs_lookup+0x6df sys/kern/vfs_lookup.c:566 namei(ffff800035c6b018) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff800035c6b018,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff80002a649d58,4,20000240,200,0,ffff800035c6b1b0) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff800035c6b260) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b444a2be10, count: -11