netdev - Re: [PATCH] select: fix sys_select to not leak ERESTARTNOHAND to userspace

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Date:	Tue, 23 Jan 2007 10:02:49 +1100
From:	Andi Kleen <ak@...e.de>
To:	Neil Horman <nhorman@...driver.com>
Cc:	akpm@...l.org, netdev@...r.kernel.org
Subject: Re: [PATCH] select: fix sys_select to not leak ERESTARTNOHAND to userspace

On Tuesday 23 January 2007 00:00, Neil Horman wrote:
> As it is currently written, sys_select checks its return code to convert
> ERESTARTNOHAND to EINTR.  However, the check is within an if (tvp) clause,
> and so if select is called from userspace with a NULL timeval, then it is
> possible for the ERESTARTNOHAND errno to leak into userspace, which is
> incorrect.  This patch moves that check outside of the conditional, and
> prevents the errno leak.


Patch looks good to me.

-Andi
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