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

From: Greg Kroah-Hartman
Date: Thu May 02 2019 - 12:39:34 EST

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@xxxxxxxxxxxxxxxxxxxxxxxxx
> Reported-by: syzbot+170a86bf206dd2c6217e@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>

Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>