panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *469966 50149 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83386d87) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd8067a15400,ffff80002a828800,1,fffffd8067a154bc,ffff80002a899390,ffff80002a89939c) 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(fffffd8071b8fcf0,ffff80002a8996e8,ffff80002a899718) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8996b8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80002a8996b8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a826548,4,200000c0,3,0) at dorenameat+0x91 sys/kern/vfs_syscalls.c:2990 syscall(ffff80002a8998a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8998a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6861fa61d0, 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(ffffffff83386d87) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd8067a15400,ffff80002a828800,1,fffffd8067a154bc,ffff80002a899390,ffff80002a89939c) 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(fffffd8071b8fcf0,ffff80002a8996e8,ffff80002a899718) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8996b8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80002a8996b8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a826548,4,200000c0,3,0) at dorenameat+0x91 sys/kern/vfs_syscalls.c:2990 syscall(ffff80002a8998a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8998a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6861fa61d0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a8991c0 rbx 0xffff800000b49de0 rdx 0x3fd rcx 0 rax 0x33 r8 0x101010101010101 r9 0x8080808080808080 r10 0xed930c6ea3271d1a r11 0xa09c3497b3ccd65b r12 0 r13 0xffff800001423600 r14 0 r15 0x1 rip 0xffffffff816014a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8991b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) tid=469966 pid=50149 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=53, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a827770,0xffffffff83983e00 process=0xffff80002a7e1210 user=0xffff80002a894000, vmspace=0xfffffd80094275c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 50149 447275 64216 0 2 0 syz-executor.0 *50149 469966 64216 0 7 0x4000000 syz-executor.0 64216 163238 4445 0 3 0x82 nanoslp syz-executor.0 4445 456019 46553 0 3 0x82 wait syz-execprog 4445 423916 46553 0 3 0x4000082 thrsleep syz-execprog 4445 178654 46553 0 3 0x4000082 thrsleep syz-execprog 4445 245779 46553 0 3 0x4000082 kqread syz-execprog 4445 34489 46553 0 3 0x4000082 thrsleep syz-execprog 4445 312893 46553 0 3 0x4000082 thrsleep syz-execprog 4445 296503 46553 0 3 0x4000082 thrsleep syz-execprog 4445 511269 46553 0 3 0x4000082 thrsleep syz-execprog 4445 143841 46553 0 3 0x4000082 thrsleep syz-execprog 46553 338530 73763 0 3 0x10008a sigsusp ksh 73763 39533 40427 0 3 0x98 kqread sshd-session 40427 413719 27505 0 3 0x92 kqread sshd-session 50211 388983 1 0 3 0x100083 ttyin getty 27505 491262 1 0 3 0x88 kqread sshd 65693 277852 79176 73 3 0x1100090 kqread syslogd 79176 326561 1 0 3 0x100082 sbwait syslogd 4993 275671 1 0 3 0x100080 kqread resolvd 25778 466279 81559 77 3 0x100092 kqread dhcpleased 31608 10460 81559 77 3 0x100092 kqread dhcpleased 81559 457991 1 0 3 0x80 kqread dhcpleased 26314 294495 0 0 3 0x14200 bored smr 47607 412750 0 0 2 0x14200 zerothread 25214 168000 0 0 3 0x14200 aiodoned aiodoned 91304 280963 0 0 3 0x14200 syncer update 38711 276676 0 0 3 0x14200 cleaner cleaner 35304 506345 0 0 3 0x14200 reaper reaper 86142 48763 0 0 3 0x14200 pgdaemon pagedaemon 20910 148709 0 0 3 0x14200 bored viomb 55294 366303 0 0 3 0x40014200 acpi0 acpi0 14140 485292 0 0 3 0x14200 bored softnet0 52916 372055 0 0 3 0x14200 smrbar systqmp 74165 235789 0 0 3 0x14200 bored systq 81242 293492 0 0 3 0x40014200 tmoslp softclock 30667 299113 0 0 3 0x40014200 idle0 1 417112 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 10141 11023K 11053K 166960K 11228 0 pcb 17 12K 12K 166960K 17 0 rtable 83 2K 2K 166960K 175 0 pf 16 10K 10K 166960K 19 0 ifaddr 14 2K 2K 166960K 18 0 ifgroup 22 1K 1K 166960K 27 0 sysctl 1 1K 9K 166960K 5 0 counters 25 16K 16K 166960K 26 0 ioctlops 0 0K 2K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1263 79K 80K 166960K 1283 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 21 3K 3K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 3 8K 12K 166960K 35 0 proc 57 58K 67K 166960K 303 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 22 1K 1K 166960K 33 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 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 340 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 163 93K 206K 166960K 3868 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 26 52K 104K 166960K 1258 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 6 0K 0K 166960K 9 0 temp 1 8636K 8700K 166960K 4106 0 kqueue 13 20K 20K 166960K 46 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 25 0 22 1 0 1 1 0 8 0 rtentry 136 45 0 12 2 0 2 2 0 8 0 unpcb 144 67 0 52 1 0 1 1 0 8 0 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpcb 736 12 0 9 1 0 1 1 0 8 0 arp 96 6 0 2 1 0 1 1 0 8 0 inpcb 328 38 0 32 1 0 1 1 0 8 0 nd6 112 6 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 193 0 48 10 0 10 10 0 8 0 art_table 40 194 0 48 2 0 2 2 0 8 0 art_node 32 45 0 14 1 0 1 1 0 8 0 dirhash 1024 20 0 0 3 0 3 3 0 8 0 dino2pl 256 1574 0 81 94 0 94 94 0 8 0 ffsino 256 1574 0 81 94 0 94 94 0 8 0 nchpl 144 1830 0 104 65 0 65 65 0 8 0 vnodes 216 1583 0 0 88 0 88 88 0 8 0 namei 1024 6344 0 6343 3 0 3 3 0 8 2 kstatmem 264 10 0 2 1 0 1 1 0 8 0 scxspl 216 9180 0 9180 8 0 8 8 1 8 8 plimitpl 152 51 0 42 1 0 1 1 0 8 0 sigapl 424 408 0 379 5 0 5 5 0 8 1 knotepl 120 7339 0 7302 2 0 2 2 0 8 0 kqueuepl 184 42 0 33 1 0 1 1 0 8 0 pipepl 304 161 0 154 2 0 2 2 0 8 1 fdescpl 448 395 0 379 4 0 4 4 0 8 2 filepl 120 1891 0 1820 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 27 0 18 1 0 1 1 0 8 0 ucredpl 104 147 0 136 1 0 1 1 0 8 0 zombiepl 144 379 0 379 1 0 1 1 0 8 1 processpl 1152 408 0 379 3 0 3 3 0 8 0 procpl 664 428 0 390 5 0 5 5 0 8 1 sockpl 552 130 0 106 2 0 2 2 0 8 0 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 9994 0 9935 18 2 16 17 0 8 8 mcl2k 2048 167 0 167 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 13326 0 13253 9 0 9 9 0 8 4 bufpl 280 4691 0 206 321 0 321 321 0 8 0 anonpl 24 202194 0 198808 59 0 59 59 0 187 29 amapchunkpl 152 12246 0 11921 29 0 29 29 0 158 10 amappl16 200 4082 0 4009 5 0 5 5 0 8 0 amappl15 192 10 0 10 1 0 1 1 0 8 1 amappl14 184 19 0 17 1 0 1 1 0 8 0 amappl13 176 390 0 389 1 0 1 1 0 8 0 amappl12 168 826 0 800 3 0 3 3 0 8 1 amappl11 160 31 0 29 1 0 1 1 0 8 0 amappl10 152 87 0 74 1 0 1 1 0 8 0 amappl9 144 1046 0 1046 1 0 1 1 0 8 1 amappl8 136 165 0 146 1 0 1 1 0 8 0 amappl7 128 144 0 140 2 0 2 2 0 8 1 amappl6 120 344 0 331 2 0 2 2 0 8 1 amappl5 112 161 0 154 1 0 1 1 0 8 0 amappl4 104 602 0 576 2 0 2 2 0 8 0 amappl3 96 1258 0 1214 2 0 2 2 0 8 0 amappl2 88 990 0 933 5 0 5 5 0 8 2 amappl1 80 16674 0 16187 27 7 20 23 0 8 9 amappl 88 2805 0 2721 5 0 5 5 0 92 1 uvmvnodes 80 1583 0 0 33 0 33 33 0 8 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 395 0 379 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 395 0 379 1 0 1 1 0 8 0 vmmpekpl 168 11507 0 11485 2 0 2 2 0 8 0 vmmpepl 168 58303 0 56991 122 0 122 122 0 357 57 vmsppl 368 394 0 379 3 0 3 3 0 8 1 rwobjpl 40 25610 0 23270 34 0 34 34 0 8 3 pdppl 4096 796 0 758 102 46 56 62 0 8 18 pvpl 32 552382 0 544119 467 151 316 445 0 265 233 pmappl 216 394 0 379 2 0 2 2 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 348 0 48 9 0 9 9 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(ffffffff83386d87) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd8067a15400,ffff80002a828800,1,fffffd8067a154bc,ffff80002a899390,ffff80002a89939c) 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(fffffd8071b8fcf0,ffff80002a8996e8,ffff80002a899718) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8996b8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80002a8996b8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a826548,4,200000c0,3,0) at dorenameat+0x91 sys/kern/vfs_syscalls.c:2990 syscall(ffff80002a8998a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8998a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6861fa61d0, 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(ffffffff83386d87) at panic+0x1cf sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd8067a15400,ffff80002a828800,1,fffffd8067a154bc,ffff80002a899390,ffff80002a89939c) 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(fffffd8071b8fcf0,ffff80002a8996e8,ffff80002a899718) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8996b8) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff80002a8996b8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a826548,4,200000c0,3,0) at dorenameat+0x91 sys/kern/vfs_syscalls.c:2990 syscall(ffff80002a8998a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8998a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6861fa61d0, count: -10