linux-kernel - Re: [Linux-kernel-mentees] [PATCH v3] media/v4l2-core: Fix kernel-infoleak in video_put

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Message-ID: <20200728130632.GI1913@kadam>
Date:   Tue, 28 Jul 2020 16:06:32 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Peilin Ye <yepeilin.cs@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Vandana BN <bnvandana@...il.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Linux-kernel-mentees] [PATCH v3] media/v4l2-core: Fix
 kernel-infoleak in video_put_user()

On Tue, Jul 28, 2020 at 02:22:29PM +0200, Linus Walleij wrote:
> On Mon, Jul 27, 2020 at 3:17 PM Dan Carpenter <dan.carpenter@...cle.com> wrote:
> 
> > Here are my latest warnings on linux-next from Friday.
> 
> Thanks for sharing this Dan, very interesting findings.
> 
> > drivers/gpio/gpiolib-cdev.c:473 lineevent_read() warn: check that 'ge' doesn't leak information (struct has a hole after 'id')
> 
> We are revamping the ABI for 64bit compatibility so we are now running
> pahole on our stuff. I suppose we need to think about mending this old ABI
> as well.

Yeah...  But this one is a false positive.  It's not super hard for me
to silence it actually.  I'll take care of it.  It could be a while
before I push this to the public repository though...

regards,
dan carpenter