linux-kernel - Re: [PATCH] Revert "zram: convert remaining CLASS_ATTR() to CLASS_ATTR

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Message-ID: <20200617123100.GB852@1wt.eu>
Date:   Wed, 17 Jun 2020 14:31:00 +0200
From:   Willy Tarreau <w@....eu>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wade Mealing <wmealing@...hat.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH] Revert "zram: convert remaining CLASS_ATTR() to
 CLASS_ATTR_RO()"

Hi Greg,

On Wed, Jun 17, 2020 at 12:34:12PM +0200, Greg Kroah-Hartman wrote:
> From: Wade Mealing <wmealing@...hat.com>
> 
> Turns out that the permissions for 0400 really are what we want here,
> otherwise any user can write to this file.
                         ^^^^^^^^
s/write to/read from/

As Wade reported, it's sufficient to read from it to create a zram entry.

Regards,
Willy