uvm_fault(0xfffffd806beb13d8, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      _copyinstr+0x58:        lodsb   (%rsi)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 13602  43624      0      0x2000  0x4000000    0K syz-executor
_copyinstr() at _copyinstr+0x58
sys_unveil(ffff80003c447d58,ffff80002c3e2870,ffff80002c3e27c0) at sys_unveil+0x152 sys/kern/vfs_syscalls.c:982
syscall(ffff80002c3e2870) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002c3e2870) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5262dafd870, count: 11
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.