linux-kernel - Re: [PATCH] drivers/net/hamradio: Integer overflow in hdlcdrv

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Message-Id: <20131219.150301.1452969308105598247.davem@davemloft.net>
Date:	Thu, 19 Dec 2013 15:03:01 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	fanwlexca@...il.com
Cc:	michael.opdenacker@...e-electrons.com, gaofeng@...fujitsu.com,
	akpm@...ux-foundation.org, t.sailer@...mni.ethz.ch,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/net/hamradio: Integer overflow in
 hdlcdrv_ioctl()

From: Wenliang Fan <fanwlexca@...il.com>
Date: Tue, 17 Dec 2013 11:25:28 +0800

> The local variable 'bi' comes from userspace. If userspace passed a
> large number to 'bi.data.calibrate', there would be an integer overflow
> in the following line:
> 	s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
> 
> Signed-off-by: Wenliang Fan <fanwlexca@...il.com>

Applied and queued up for -stable, thanks.
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