uvm_fault(0xffffffff839ee6b8, 0xffff800029862004, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      ufs_lookup+0x613:       movzwl  0x4(%r15,%r14,1),%ebx
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*439884  68685      0           0  0x4000000    0  syz-executor
ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279
VOP_LOOKUP(fffff70070409b18,ffff80002a760ef0,ffff80002a760f20) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff80002a760ec0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580
namei(ffff80002a760ec0) at namei+0x7c3 sys/kern/vfs_lookup.c:250
vn_open(ffff80002a760ec0,801,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146
doopenat(ffff80002a736008,ffffff9c,200000000800,800,0,0,cc71b68985a59240) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163
sys_open(ffff80002a736008,ffff80002a761160,ffff80002a7610b0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065
syscall(ffff80002a761160) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a761160) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2583f3f57c0, count: 6
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>