linux-kernel - Re: [PATCH] media: pvrusb2: use a different format for warnings

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Message-ID: <20190502163907.GA14995@kroah.com>
Date:   Thu, 2 May 2019 18:39:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     linux-usb@...r.kernel.org, linux-media@...r.kernel.org,
        Alan Stern <stern@...land.harvard.edu>,
        Mike Isely <isely@...ox.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org,
        syzbot+af8f8d2ac0d39b0ed3a0@...kaller.appspotmail.com,
        syzbot+170a86bf206dd2c6217e@...kaller.appspotmail.com
Subject: Re: [PATCH] media: pvrusb2: use a different format for warnings

On Thu, May 02, 2019 at 06:09:26PM +0200, Andrey Konovalov wrote:
> When the pvrusb2 driver detects that there's something wrong with the
> device, it prints a warning message. Right now those message are
> printed in two different formats:
> 
> 1. ***WARNING*** message here
> 2. WARNING: message here
> 
> There's an issue with the second format. Syzkaller recognizes it as a
> message produced by a WARN_ON(), which is used to indicate a bug in the
> kernel. However pvrusb2 prints those warnings to indicate an issue with
> the device, not the bug in the kernel.
> 
> This patch changes the pvrusb2 driver to consistently use the first
> warning message format. This will unblock syzkaller testing of this
> driver.
> 
> Reported-by: syzbot+af8f8d2ac0d39b0ed3a0@...kaller.appspotmail.com
> Reported-by: syzbot+170a86bf206dd2c6217e@...kaller.appspotmail.com
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>