linux-kernel - Re: [PATCH] libata: fix HDIO_GET

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Message-ID: <20160211151030.GW3741@mtj.duckdns.org>
Date:	Thu, 11 Feb 2016 10:10:30 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Soohoon Lee <Soohoon.Lee@...com>, stable@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libata: fix HDIO_GET_32BIT ioctl

On Thu, Feb 11, 2016 at 02:16:27PM +0100, Arnd Bergmann wrote:
> As reported by Soohoon Lee, the HDIO_GET_32BIT ioctl does not
> work correctly in compat mode with libata.
> 
> I have investigated the issue further and found multiple problems
> that all appeared with the same commit that originally introduced
> HDIO_GET_32BIT handling in libata back in linux-2.6.8 and presumably
> also linux-2.4, as the code uses "copy_to_user(arg, &val, 1)" to copy
> a 'long' variable containing either 0 or 1 to user space.

Applied to libata/for-4.5-fixes.

Thanks a lot!

-- 
tejun