netdev - Re: [PATCH 15/17] switch kernel_sendmsg() and kernel_recvmsg() to iov_iter

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Date:	Tue, 14 Apr 2015 17:34:03 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH 15/17] switch kernel_sendmsg() and kernel_recvmsg() to
 iov_iter_kvec()

On Tue, Apr 14, 2015 at 04:21:02PM +0000, David Laight wrote:

> Massive NAK.
> This breaks any code that is using msg_control to set SCTP parameters
> when sending data.

	Huh?  ->sendmsg() expects ->msg_control already in kernel space;
it's ->recvmsg() that plays silly buggers with userland pointers there.
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