panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 357851 53358 0 0 0 1 syz-executor *314226 55192 0 0 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d8a94) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806ecc8d38,ffff80003b7fe802,5,fffffd806ecc8e1c,ffff80002a328970,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd805e852058,ffff80002a328c18,ffff80002a328c48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a328be8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a328be8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a2707e0,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a328e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae4c0058d0, 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 *cpu0: ufsdirhash_lookup: bad offset in hash array ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d8a94) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806ecc8d38,ffff80003b7fe802,5,fffffd806ecc8e1c,ffff80002a328970,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd805e852058,ffff80002a328c18,ffff80002a328c48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a328be8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a328be8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a2707e0,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a328e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae4c0058d0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a328790 rbx 0xffffffff83816e07 cpu_info_full_primary+0x2e07 rdx 0xffff800001486c40 rcx 0xffff80002a2707e0 rax 0xffffffff83815ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x70ebe81375d898b2 r11 0x7d89c91d726bc2e2 r12 0xffffffff83816c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff81f5e755 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a328780 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=314226 pid=55192 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a270018,0xffffffff839dd598 process=0xffff8000fffeeb68 user=0xffff80002a323000, vmspace=0xfffffd806c6cfd78 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53358 357851 43733 0 7 0 syz-executor 53358 439325 43733 0 3 0x4000080 kqsel syz-executor 55192 87333 51891 0 2 0 syz-executor *55192 314226 51891 0 7 0x4000000 syz-executor 72005 499870 98947 0 2 0 syz-executor 72005 306254 98947 0 3 0x4000080 lockf syz-executor 72005 123794 98947 0 3 0x4000080 fsleep syz-executor 24122 55637 0 0 3 0x14200 acct acct 44578 206599 4720 0 3 0x3000 suspend syz-executor 44578 45385 4720 0 2 0x4081000 syz-executor 4720 196296 71742 0 3 0x82 nanoslp syz-executor 76291 144572 71742 0 3 0x82 nanoslp syz-executor 43733 57998 71742 0 2 0xc82 syz-executor 48300 106431 71742 0 3 0x82 piperd syz-executor 51891 417004 71742 0 2 0xc82 syz-executor 98947 395456 71742 0 3 0x82 nanoslp syz-executor 41523 202012 71742 0 3 0x82 piperd syz-executor 57962 318387 71742 0 3 0x82 wait syz-executor 71742 371730 76404 0 2 0x2 syz-executor 76404 489535 98221 0 3 0x10008a sigsusp ksh 98221 434379 88920 0 3 0x98 kqread sshd-session 88920 16678 7088 0 3 0x92 kqread sshd-session 7793 455810 1 0 3 0x100083 ttyopn getty 7088 294111 1 0 3 0x88 kqread sshd 78568 72531 21619 74 3 0x1100092 bpf pflogd 21619 22416 1 0 3 0x80 sbwait pflogd 49954 155710 14127 73 3 0x1100090 kqread syslogd 14127 121128 1 0 3 0x100082 sbwait syslogd 13568 455007 1 0 3 0x100080 kqread resolvd 58504 420210 49252 77 3 0x100092 kqread dhcpleased 71879 129917 49252 77 3 0x100092 kqread dhcpleased 49252 484716 1 0 3 0x80 kqread dhcpleased 8434 345522 0 0 3 0x14200 bored smr 59731 518637 0 0 3 0x14200 pgzero zerothread 53588 85363 0 0 3 0x14200 aiodoned aiodoned 2073 175281 0 0 3 0x14200 syncer update 82836 372062 0 0 3 0x14200 cleaner cleaner 36799 495074 0 0 3 0x14200 reaper reaper 81166 446216 0 0 3 0x14200 pgdaemon pagedaemon 48231 481352 0 0 3 0x14200 bored viomb 41770 322639 0 0 3 0x40014200 acpi0 acpi0 16035 224448 0 0 3 0x40014200 idle1 57795 318352 0 0 3 0x14200 bored softnet1 98511 52495 0 0 3 0x14200 bored softnet0 41673 198909 0 0 3 0x14200 bored systqmp 82433 30785 0 0 3 0x14200 bored systq 84117 209665 0 0 3 0x14200 tmoslp softclockmp 57585 88587 0 0 3 0x40014200 tmoslp softclock 4926 253217 0 0 3 0x40014200 idle0 1 274804 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 55192 (syz-executor) thread 0xffff80002a2707e0 (314226) exclusive rrwlock inode r = 0 (0xfffffd806ecc8dd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8391cd20) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 #2 Xsyscall+0x128 Process 44578 (syz-executor) thread 0xffff80002a271240 (45385) exclusive rrwlock inode r = 0 (0xfffffd806d6c07c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11110K 11437K 166960K 13635 0 pcb 17 20K 25K 166960K 576 0 rtable 228 11K 11K 166960K 670 0 pf 33 17K 24K 166960K 189 0 ifaddr 40 7K 8K 166960K 136 0 ifgroup 54 2K 2K 166960K 213 0 sysctl 4 1K 9K 166960K 19 0 counters 68 36K 37K 166960K 232 0 ioctlops 0 0K 4K 166960K 1872 0 iov 0 0K 20K 166960K 232 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 3033 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 103 0 dirhash 78 14K 15K 166960K 1713 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 1581 0 sigio 0 0K 0K 166960K 56 0 proc 73 115K 180K 166960K 811 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 177 0 in_multi 84 6K 7K 166960K 225 0 ether_multi 1 0K 0K 166960K 8 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 2K 166960K 1051 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 161K 178K 166960K 15713 0 UVM aobj 16 6K 8K 166960K 22 0 pinsyscall 41 82K 102K 166960K 2859 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 98 0 NDP 11 0K 2K 166960K 94 0 temp 80 8680K 8756K 166960K 58786 0 kqueue 13 20K 32K 166960K 305 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 124 0 121 1 0 1 1 0 8 0 rtentry 176 200 0 111 6 1 5 6 0 8 0 unpcb 144 1319 0 1302 13 11 2 6 0 8 1 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 736 351 0 342 4 3 1 4 0 8 0 arp 136 30 0 13 1 0 1 1 0 8 0 inpcb 328 1936 0 1924 20 12 8 12 0 8 6 nd6 152 41 0 22 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 62 0 62 1 0 1 1 0 8 1 pppxif 1504 10 0 10 3 3 0 1 0 8 0 pffrag 232 9 0 4 1 0 1 1 0 482 0 pffrnode 88 9 0 4 1 0 1 1 0 8 0 pffrent 40 18 0 13 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 78 0 24 1 0 1 1 0 8 0 pfstkey 128 78 0 24 2 0 2 2 0 8 0 pfstate 448 78 0 24 7 0 7 7 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 971 0 609 33 8 25 29 0 8 2 art_table 40 975 0 609 5 0 5 5 0 8 0 art_node 32 200 0 122 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 13 0 2 1 0 1 1 0 8 0 dirhash 1024 585 0 546 6 0 6 6 0 8 0 dino2pl 256 4359 0 2842 96 0 96 96 0 8 0 ffsino 296 4359 0 2842 118 1 117 118 0 8 0 nchpl 144 6442 0 4729 64 0 64 64 0 8 0 rtmask 32 12 0 12 2 1 1 1 0 8 1 vnodes 216 5355 0 0 298 0 298 298 0 8 0 namei 1024 23439 0 23437 2 1 1 2 0 8 0 percpumem 16 131 0 82 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 6 0 4 1 0 1 1 0 8 0 kstatmem 264 132 0 108 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 34300 0 34300 15 11 4 8 1 8 4 plimitpl 152 440 0 421 1 0 1 1 0 8 0 sigapl 424 1870 0 1823 7 1 6 7 0 8 0 knotepl 120 613 0 0 18 0 18 18 0 8 0 kqueuepl 224 738 0 727 8 6 2 5 0 8 1 pipepl 344 299 0 272 3 0 3 3 0 8 0 fdescpl 528 1850 0 1820 3 0 3 3 0 8 0 filepl 160 13119 0 12889 28 14 14 20 0 8 1 lockfpl 104 575 0 570 1 0 1 1 0 8 0 lockfspl 48 220 0 216 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 60 0 43 1 0 1 1 0 8 0 ucredpl 104 2433 0 2420 1 0 1 1 0 8 0 zombiepl 144 1826 0 1823 1 0 1 1 0 8 0 processpl 1232 1870 0 1823 5 1 4 5 0 8 0 procpl 664 4205 0 4153 7 1 6 7 0 8 0 sosppl 176 14 0 14 1 0 1 1 0 8 1 sockpl 752 3416 0 3384 41 30 11 18 0 8 7 mcl64k 65536 23 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 79 0 0 10 0 10 10 0 8 0 mtagpl 96 62 0 0 2 0 2 2 0 8 0 mbufpl 256 303 0 0 19 0 19 19 0 8 0 bufpl 280 13193 0 7056 439 0 439 439 0 8 0 anonpl 32 10865 0 0 88 0 88 88 0 246 0 amapchunkpl 152 54291 0 53775 36 9 27 32 0 158 3 amappl16 200 6439 0 6208 49 32 17 22 0 8 4 amappl15 192 21 0 21 3 3 0 1 0 8 0 amappl14 184 8 0 7 1 0 1 1 0 8 0 amappl13 176 498 0 497 1 0 1 1 0 8 0 amappl12 168 2256 0 2215 3 1 2 3 0 8 0 amappl11 160 9 0 8 1 0 1 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 106 0 104 1 0 1 1 0 8 0 amappl6 120 347 0 333 1 0 1 1 0 8 0 amappl5 112 84 0 72 1 0 1 1 0 8 0 amappl4 104 473 0 442 1 0 1 1 0 8 0 amappl3 96 10737 0 10629 6 2 4 4 0 8 0 amappl2 88 619 0 556 2 0 2 2 0 8 0 amappl1 80 16649 0 16055 16 2 14 15 0 8 0 amappl 88 14632 0 14465 5 0 5 5 0 92 0 uvmvnodes 80 154 0 0 4 0 4 4 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 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 2 1 1 1 0 8 1 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 8 0 8 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 21 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1850 0 1820 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1850 0 1820 1 0 1 1 0 8 0 vmmpekpl 168 16077 0 16023 3 0 3 3 0 8 0 vmmpepl 168 122807 0 120707 115 11 104 104 0 357 3 vmsppl 488 1849 0 1820 5 0 5 5 0 8 0 rwobjpl 80 34262 0 32949 38 7 31 31 0 8 0 pdppl 4096 3719 0 3650 122 47 75 85 0 8 6 pvpl 32 19684 0 0 159 0 159 159 0 265 0 pmappl 256 1855 0 1824 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 335 0 65 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833d8a94) at panic+0x1e5 sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd806ecc8d38,ffff80003b7fe802,5,fffffd806ecc8e1c,ffff80002a328970,0) at ufsdirhash_lookup+0xb9a sys/ufs/ufs/ufs_dirhash.c:342 ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd805e852058,ffff80002a328c18,ffff80002a328c48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a328be8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a328be8) at namei+0x7ca sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a2707e0,4,200000000040,3,200000000280) at dorenameat+0x144 sys/kern/vfs_syscalls.c:3004 syscall(ffff80002a328e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae4c0058d0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7d1e88582cd0, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x7d1e88582cd0, count: -3