panic: ufsdirhash_lookup: bad offset in hash array Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *191581 11033 0 0 0x4000000 0K syz-executor.1 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82871713) at panic+0x17b sys/kern/subr_prf.c:198 ufsdirhash_lookup(fffffd80668a2660,ffffffff8284eff4,2,fffffd80668a272c,ffff8000246fc9f8,0) at ufsdirhash_lookup+0x8b8 sys/ufs/ufs/ufs_dirhash.c:343 ufs_lookup() at ufs_lookup+0xc15 sys/ufs/ufs/ufs_lookup.c:216 VOP_LOOKUP(fffffd80643557f8,ffff8000246fcb98,ffff8000246fcb38) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd80643557f8,ffff8000211e4d60) at unveil_find_cover+0x130 sys/kern/kern_unveil.c:277 unveil_start_relative(ffff8000211e4d60,ffff8000246fced8,fffffd80643557f8) at unveil_start_relative+0xf6 sys/kern/kern_unveil.c:606 namei(ffff8000246fced8) at namei+0x453 sys/kern/vfs_lookup.c:237 vn_open(ffff8000246fced8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff8000211e4d60,4,20000240,200,0,ffff8000246fd0b0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff8000246fd130) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000246fd130) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x42445b39720, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.