linux-kernel - Re: [PATCH] drm: qxl: ratelimit pr_info message, reduce log spamming

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1505226117.31639.24.camel@redhat.com>
Date:   Tue, 12 Sep 2017 16:21:57 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>,
        Emil Velikov <emil.l.velikov@...il.com>
Cc:     Colin King <colin.king@...onical.com>,
        Dave Airlie <airlied@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@...ts.linux-foundation.org>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        kernel-janitors@...r.kernel.org,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: qxl: ratelimit pr_info message, reduce log spamming

On Tue, 2017-09-12 at 17:09 +0300, Dan Carpenter wrote:
> On Tue, Sep 12, 2017 at 03:02:04PM +0100, Emil Velikov wrote:
> > That said, I'm not sure how useful the information is - perhaps
> > it's
> > better to drop it all together?
> 
> Or a WARN_ONCE().

It's userspace calling into the driver with invalid parameters.

IMO we should never WARN_ONCE() on something userspace can trigger.

I'd suggest to just drop the message altogether, simply throwing EINVAL
at userspace is perfectly fine IMHO.

cheers,
  Gerd