linux-kernel - Re: [RESEND][PATCH] ima: Set and clear FMODE_CAN_READ in ima_calc_file

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Date:   Fri, 13 Nov 2020 10:53:19 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...wei.com>
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, silviu.vlasceanu@...wei.com,
        stable@...r.kernel.org
Subject: Re: [RESEND][PATCH] ima: Set and clear FMODE_CAN_READ in
 ima_calc_file_hash()

Hi Roberto,

On Fri, 2020-11-13 at 09:01 +0100, Roberto Sassu wrote:
> Commit a1f9b1c0439db ("integrity/ima: switch to using __kernel_read")
> replaced the __vfs_read() call in integrity_kernel_read() with
> __kernel_read(), a new helper introduced by commit 61a707c543e2a ("fs: add
> a __kernel_read helper").
> 
> Since the new helper requires that also the FMODE_CAN_READ flag is set in
> file->f_mode, this patch saves the original f_mode and sets the flag if the
> the file descriptor has the necessary file operation. Lastly, it restores
> the original f_mode at the end of ima_calc_file_hash().
> 
> Cc: stable@...r.kernel.org # 5.8.x
> Fixes: a1f9b1c0439db ("integrity/ima: switch to using __kernel_read")
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>

Thanks!  It's now queued in next-integrity-testing.

Mimi