linux-kernel - Re: [PATCH v3] hdlcdrv: Fix divide by zero in hdlcdrv

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Message-Id: <20170527.184558.961743025477428078.davem@davemloft.net>
Date:   Sat, 27 May 2017 18:45:58 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     firogm@...il.com
Cc:     alan@...ux.intel.com, t.sailer@...mni.ethz.ch, wharms@....de,
        andreyknvl@...gle.com, linux-hams@...r.kernel.org,
        gregkh@...uxfoundation.org, netdev@...r.kernel.org,
        thomas@...erried.de, javier@....samsung.com, dhowells@...hat.com,
        geliangtang@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] hdlcdrv: Fix divide by zero in hdlcdrv_ioctl

From: Firo Yang <firogm@...il.com>
Date: Fri, 26 May 2017 22:37:38 +0800

> syszkaller fuzzer triggered a divide by zero, when set calibration
> through ioctl().
> 
> To fix it, test 'bitrate' if it is negative or 0, just return -EINVAL.
> 
> Reported-by: Andrey Konovalov <andreyknvl@...gle.com>
> Signed-off-by: Firo Yang <firogm@...il.com>

Applied, thank you.