panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *124219 43992 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8339f0b0) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806cca3400,ffff80003c92a002,5,fffffd806cca34bc,ffff800032509940,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80640c5e80,ffff800032509be8,ffff800032509c18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800032509bb8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff800032509bb8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003c9dd4f0,5,200000000040,4,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff800032509e50) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800032509e50) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87d2613c290, 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: ufsdirhash_lookup: bad offset in hash array ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8339f0b0) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806cca3400,ffff80003c92a002,5,fffffd806cca34bc,ffff800032509940,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80640c5e80,ffff800032509be8,ffff800032509c18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800032509bb8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff800032509bb8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003c9dd4f0,5,200000000040,4,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff800032509e50) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800032509e50) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87d2613c290, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800032509770 rbx 0xffff8000014c9290 rdx 0xffff80000143cec0 rcx 0 rax 0xffff80003c9dd4f0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x263a82a0a1dfcad4 r11 0xa7f524a41d28839b r12 0 r13 0xffff8000014cd000 r14 0 r15 0x1 rip 0xffffffff82351de5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800032509760 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=124219 pid=43992 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c9ddcb8,0xffffffff83957760 process=0xffff8000fffec4a0 user=0xffff800032504000, vmspace=0xfffffd806cb2fd00 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 43992 447098 71684 0 2 0 syz-executor *43992 124219 71684 0 7 0x4000000 syz-executor 87718 435466 60789 0 2 0 syz-executor 76256 515261 48776 0 2 0 syz-executor 76256 8653 48776 0 2 0x4000000 syz-executor 24811 159007 14307 0 2 0 syz-executor 24811 517780 14307 0 3 0x4000080 piperd syz-executor 24811 273565 14307 0 3 0x4000080 piperd syz-executor 19589 173449 0 0 3 0x14200 acct acct 78246 120382 92047 0 4 0x82000 syz-executor 78246 360289 92047 0 2 0x4082000 syz-executor 78246 372141 92047 0 3 0x4002000 suspend syz-executor 48776 37960 29788 0 3 0x82 nanoslp syz-executor 57656 124546 0 0 3 0x14280 nfsidl nfsio 84628 411818 0 0 3 0x14280 nfsidl nfsio 3525 268184 0 0 3 0x14280 nfsidl nfsio 72083 454254 0 0 3 0x14280 nfsidl nfsio 84371 345340 0 0 3 0x14280 nfsidl nfsio 18757 364784 0 0 3 0x14280 nfsidl nfsio 51846 178200 0 0 3 0x14280 nfsidl nfsio 75745 467152 0 0 3 0x14280 nfsidl nfsio 22239 231179 0 0 3 0x14280 nfsidl nfsio 511 442777 0 0 3 0x14280 nfsidl nfsio 88256 480970 0 0 3 0x14280 nfsidl nfsio 32771 214883 0 0 3 0x14280 nfsidl nfsio 62567 87785 0 0 3 0x14280 nfsidl nfsio 61281 179684 0 0 3 0x14280 nfsidl nfsio 3752 389966 0 0 3 0x14280 nfsidl nfsio 21315 365777 0 0 3 0x14280 nfsidl nfsio 37045 212203 0 0 3 0x14280 nfsidl nfsio 71708 110640 0 0 3 0x14280 nfsidl nfsio 2495 203334 0 0 3 0x14280 nfsidl nfsio 29222 502029 0 0 3 0x14280 nfsidl nfsio 92047 292730 29788 0 3 0x82 nanoslp syz-executor 13821 8671 29788 0 2 0x2 syz-executor 14307 359473 29788 0 3 0x82 nanoslp syz-executor 9372 73805 29788 0 3 0x82 nanoslp syz-executor 60789 229898 29788 0 3 0x82 nanoslp syz-executor 95844 70735 29788 0 3 0x82 wait syz-executor 71684 251227 29788 0 3 0x82 nanoslp syz-executor 29788 392907 54085 0 2 0x2 syz-executor 54085 415936 71264 0 3 0x10008a sigsusp ksh 71264 296036 54076 0 3 0x98 kqread sshd-session 54076 398729 32640 0 3 0x92 kqread sshd-session 20203 280175 1 0 3 0x100083 ttyopn getty 32640 510554 1 0 3 0x88 kqread sshd 15589 388768 21878 73 3 0x1100090 kqread syslogd 21878 249468 1 0 3 0x100082 sbwait syslogd 91278 408898 1 0 3 0x100080 kqread resolvd 120 58829 13851 77 3 0x100092 kqread dhcpleased 36477 468092 13851 77 3 0x100092 kqread dhcpleased 13851 221701 1 0 3 0x80 kqread dhcpleased 10734 503767 0 0 3 0x14200 bored smr 27488 322680 0 0 2 0x14200 zerothread 92864 125365 0 0 3 0x14200 aiodoned aiodoned 25781 437412 0 0 3 0x14200 syncer update 75747 23288 0 0 3 0x14200 cleaner cleaner 42280 95178 0 0 3 0x14200 reaper reaper 26064 289706 0 0 3 0x14200 pgdaemon pagedaemon 79333 362670 0 0 3 0x14200 bored viomb 19902 100261 0 0 3 0x40014200 acpi0 acpi0 41210 394157 0 0 3 0x14200 bored softnet0 39628 279073 0 0 3 0x14200 bored systqmp 13281 325006 0 0 3 0x14200 bored systq 86565 159964 0 0 3 0x40014200 tmoslp softclock 74051 74011 0 0 3 0x40014200 idle0 1 237757 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11058K 12254K 166960K 13435 0 pcb 19 20K 22K 166960K 258 0 rtable 236 10K 10K 166960K 517 0 pf 32 13K 19K 166960K 138 0 ifaddr 40 7K 7K 166960K 92 0 ifgroup 54 2K 2K 166960K 145 0 sysctl 4 1K 9K 166960K 22 0 counters 34 17K 18K 166960K 87 0 ioctlops 0 0K 4K 166960K 329 0 iov 0 0K 20K 166960K 165 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1527 96K 96K 166960K 2740 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 74 0 dirhash 60 10K 12K 166960K 1158 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1150 0 sigio 0 0K 0K 166960K 143 0 proc 60 59K 83K 166960K 619 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 139 0 in_multi 88 6K 7K 166960K 145 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 15 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 603 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 151K 169K 166960K 11977 0 UVM aobj 83 9K 9K 166960K 86 0 pinsyscall 38 76K 91K 166960K 2249 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 106 0 NDP 12 0K 2K 166960K 64 0 temp 75 8672K 8928K 166960K 58883 0 kqueue 13 20K 28K 166960K 207 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 120 220 0 216 2 0 2 2 0 8 1 rtentry 136 144 0 49 4 0 4 4 0 8 0 unpcb 144 1174 0 1158 8 2 6 6 0 8 5 syncache 336 10 0 10 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 597 0 591 13 9 4 10 0 8 3 arp 96 22 0 5 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 1 1 0 1 1 0 8 0 inpcb 328 1551 0 1537 24 15 9 15 0 8 7 nd6 112 28 0 6 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 46 0 46 1 0 1 1 0 8 1 pppxif 1384 4 0 4 2 1 1 1 0 8 1 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfrule 1344 7 0 6 1 0 1 1 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 667 0 257 33 2 31 31 0 8 5 art_table 40 671 0 257 5 0 5 5 0 8 0 art_node 32 143 0 59 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 69 0 59 1 0 1 1 0 8 0 shmpl 112 79 0 2 3 0 3 3 0 8 0 dirhash 1024 401 0 368 5 0 5 5 0 8 0 dino2pl 256 3589 0 2088 95 0 95 95 0 8 0 ffsino 256 3589 0 2088 95 0 95 95 0 8 0 nchpl 144 5239 0 3550 64 0 64 64 0 8 0 rtmask 32 12 0 12 2 1 1 1 0 8 1 vnodes 216 4556 0 0 254 0 254 254 0 8 0 namei 1024 19107 0 19104 2 1 1 2 0 8 0 vcpupl 3904 3 0 0 1 0 1 1 0 8 0 vmpool 800 4 0 1 1 0 1 1 0 8 0 kstatmem 264 92 0 68 3 0 3 3 0 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 18957 0 18957 10 2 8 8 1 8 8 plimitpl 152 390 0 373 1 0 1 1 0 8 0 sigapl 424 1447 0 1384 9 1 8 8 0 8 0 knotepl 120 335276 0 335229 18 8 10 10 0 8 8 kqueuepl 184 548 0 539 4 0 4 4 0 8 3 pipepl 304 254 0 226 5 2 3 5 0 8 0 fdescpl 448 1407 0 1378 4 0 4 4 0 8 0 filepl 120 10910 0 10689 24 9 15 16 0 8 7 lockfpl 104 378 0 376 1 0 1 1 0 8 0 lockfspl 48 160 0 158 1 0 1 1 0 8 0 sessionpl 144 25 0 17 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 2101 0 2090 1 0 1 1 0 8 0 zombiepl 144 1386 0 1384 1 0 1 1 0 8 0 processpl 1152 1447 0 1384 5 0 5 5 0 8 0 procpl 664 2961 0 2892 7 0 7 7 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 552 2996 0 2962 29 18 11 17 0 8 8 mcl64k 65536 59 0 59 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 18 0 18 2 1 1 1 0 8 1 mcl4k 4096 3798 0 3741 16 8 8 15 0 8 0 mcl2k2 2112 3 0 3 1 0 1 1 0 8 1 mcl2k 2048 1769 0 1768 11 8 3 9 0 8 2 mtagpl 96 37 0 13 1 0 1 1 0 8 0 mbufpl 256 15226 0 15041 22 7 15 19 0 8 1 bufpl 280 7284 0 1063 445 0 445 445 0 8 0 anonpl 24 258162 0 247696 111 11 100 100 0 187 19 amapchunkpl 152 41240 0 40685 43 8 35 35 0 158 9 amappl16 200 5108 0 4705 40 6 34 36 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 418 0 417 1 0 1 1 0 8 0 amappl12 168 1761 0 1723 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 48 0 38 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 302 0 291 1 0 1 1 0 8 0 amappl5 112 86 0 78 1 0 1 1 0 8 0 amappl4 104 414 0 391 1 0 1 1 0 8 0 amappl3 96 7878 0 7774 4 0 4 4 0 8 1 amappl2 88 551 0 497 2 0 2 2 0 8 0 amappl1 80 13661 0 13123 16 1 15 15 0 8 2 amappl 88 11062 0 10896 5 0 5 5 0 92 0 uvmvnodes 80 129 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 128 256 0 256 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 85 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1407 0 1378 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1407 0 1378 1 0 1 1 0 8 0 vmmpekpl 168 12363 0 12322 2 0 2 2 0 8 0 vmmpepl 168 95524 0 93366 112 3 109 109 0 357 3 vmsppl 368 1406 0 1378 4 1 3 4 0 8 0 rwobjpl 40 27159 0 25731 18 0 18 18 0 8 1 pdppl 4096 2828 0 2761 110 39 71 76 0 8 4 pvpl 32 664771 0 648924 212 22 190 190 0 265 36 pmappl 216 1410 0 1379 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 425 0 80 11 0 11 11 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(ffffffff8339f0b0) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806cca3400,ffff80003c92a002,5,fffffd806cca34bc,ffff800032509940,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80640c5e80,ffff800032509be8,ffff800032509c18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800032509bb8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff800032509bb8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003c9dd4f0,5,200000000040,4,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff800032509e50) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800032509e50) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87d2613c290, 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(ffffffff8339f0b0) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806cca3400,ffff80003c92a002,5,fffffd806cca34bc,ffff800032509940,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd80640c5e80,ffff800032509be8,ffff800032509c18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800032509bb8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff800032509bb8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80003c9dd4f0,5,200000000040,4,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff800032509e50) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800032509e50) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87d2613c290, count: -10