On Tue, 2 Sept 2025 at 08:03, Siddhesh Poyarekar <siddhesh@xxxxxxxxxx> wrote:
>
> This was actually the original issue I had tried to address, escaping
> '#' in the beginning of the devname because it ends up in the beginning
> of the line, thus masking out the entire line in mounts. I don't
> remember at what point I concluded that escaping '#' always was the
> answer (maybe to protect against any future instances where userspace
> ends up ignoring the rest of the line following the '#'), but it appears
> to be wrong.
I wonder if instead of escaping hash-marks we could just disallow them
as the first character in devname.
How did this issue with hash-marks get found? Is there some real use -
in which case we obviously can't disallow them - or was this from some
fuzzing test that happened to hit it?
Linus
