[File] Out-of-bounds read in is_tar.c from_oct implementation

[Tobi Laskowski]

Dear maintainers,

While building libmagic on CheriBSD, I discovered a buffer overread in is_tar.c when enabling strict subobject bounds on the compiler. I have posted details about the bug on the bug tracker, along with a suggested patch: https://bugs.astron.com/view.php?id=767

I thought I would mention it here as well in case the tracker is not checked regularly.

Thanks,
Tobi