linux-kernel - Re: [PATCH 0/2] aio: fix the vectored aio routines

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Message-Id: <20100504131353.adf8c186.akpm@linux-foundation.org>
Date:	Tue, 4 May 2010 13:13:53 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	linux-aio@...ck.org, linux-kernel@...r.kernel.org, mjt@....msk.ru,
	stable@...nel.org
Subject: Re: [PATCH 0/2] aio: fix the vectored aio routines

On Fri, 30 Apr 2010 16:48:58 -0400
Jeff Moyer <jmoyer@...hat.com> wrote:

> Hi,
> 
> It was reported[1] that 32 bit readv and writev AIO operations were
> not functioning properly.  It turns out that the code to convert the
> 32bit io vectors to 64 bits was never written.  The results of that
> can be pretty bad, but in my testing, it mostly ended up in generating
> EFAULT as we walked off the list of I/O vectors provided.
> 
> This patch set fixes the problem in my environment.  Comments, as always,
> are greatly appreciated.
> 
> Cheers,
> Jeff
> 
> [1] http://lkml.org/lkml/2010/3/8/309
> 
> [PATCH 1/2] compat: factor out compat_rw_copy_check_uvector from compat_do_readv_writev
> [PATCH 2/2] aio: fix the compat vectored operations

The patches are large(ish) and we're at -rc6.  I'm inclined to merge
these into 2.6.35-rc1 with a -stable tag so they get backported into 2.6.34.1
after a bit of mainline testing, OK?

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