From: Oleg Nesterov <oleg@redhat.com>
To: Christopher Yeoh <cyeoh@au1.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [RESEND][PATCH] Cleanup of rw_copy_check_uvector and compat_rw_copy_check_uvector
Date: Thu, 12 Apr 2012 23:54:10 +0200 [thread overview]
Message-ID: <20120412215410.GB31852@redhat.com> (raw)
In-Reply-To: <20120411210604.26d04483@Gantu>
On 04/11, Christopher Yeoh wrote:
>
> Resending this patch which I first sent a couple of months ago and
> didn't notice it didn't go in at the time.
>
> This is the cleanup of rw_copy_check_uvector and
> compat_rw_copy_check_uvector after changes made to support CMA in an
> earlier patch. Rather than having an additional check_access parameter
> to these functions, the first paramater type is overloaded to allow the
> caller to specify CHECK_IOVEC_ONLY which means check that the contents
> of the iovec are valid, but do not check the memory that they point to.
> This is used by process_vm_readv/writev where we need to validate that a
> iovec passed to the syscall is valid but do not want to check the
> memory that it points to at this point because it refers to an address
> space in another process.
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
prev parent reply other threads:[~2012-04-12 21:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-11 11:36 [RESEND][PATCH] Cleanup of rw_copy_check_uvector and compat_rw_copy_check_uvector Christopher Yeoh
2012-04-12 21:54 ` Oleg Nesterov [this message]
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