Re: [RESEND][PATCH] ima: Set and clear FMODE_CAN_READ in ima_calc_file_hash()

[Linus Torvalds]

On Mon, Nov 16, 2020 at 8:47 AM Mimi Zohar <zohar@xxxxxxxxxxxxx> wrote:
>
> This discussion seems to be going down the path of requiring an IMA
> filesystem hook for reading the file, again.  That solution was
> rejected, not by me.  What is new this time?

You can't read a non-read-opened file. Not even IMA can.

So don't do that then.

IMA is doing something wrong. Why would you ever read a file that can't be read?

Fix whatever "open" function instead of trying to work around the fact
that you opened it wrong.

             Linus