linux-kernel - Re: [PATCH] tty: an overflow of multiplication in drivers/tty/cyclades.c

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Date:	Wed, 18 Dec 2013 16:57:40 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	xqx12 <s2exqx@...il.com>
Cc:	jslaby@...e.cz, linux-kernel@...r.kernel.org, chyyuu@...il.com,
	xuyongjiande@...il.com, xqx12 <xiaoqixue_1@....com>
Subject: Re: [PATCH] tty: an overflow of multiplication in
 drivers/tty/cyclades.c

On Wed, Dec 18, 2013 at 09:00:29AM +0800, xqx12 wrote:
> there is an overflow in the code :
> cyz_polling_cycle = (arg * HZ) / 1000,
> the multiplicator arg comes from user, so it may be an overflow if
> arg is a big number. And the value of cyc_polling_cycle will be
> wrong when it is used next time.
> 
> Reported-by: Qixue Xiao <xiaoqixue_1@....com>
> Suggested-by: Yongjian Xu <xuyongjiande@...il.com>
> Suggested-by: Yu Chen <chyyuu@...il.com>
> Signed-off-by: Qixue Xiao <xiaoqixue_1@....com>

I need a "real" name as the "From:" line here, especially as it doesn't
match any of these lines either :(

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