netdev - Re: [PATCH net] packet: compat support for sock

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Message-Id: <20160609.234119.2132907033141598314.davem@davemloft.net>
Date:	Thu, 09 Jun 2016 23:41:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	willemdebruijn.kernel@...il.com
Cc:	netdev@...r.kernel.org, daniel@...earbox.net, deller@....de,
	willemb@...gle.com
Subject: Re: [PATCH net] packet: compat support for sock_fprog

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Tue,  7 Jun 2016 12:06:34 -0400

> From: Willem de Bruijn <willemb@...gle.com>
> 
> Socket option PACKET_FANOUT_DATA takes a struct sock_fprog as argument
> if PACKET_FANOUT has mode PACKET_FANOUT_CBPF. This structure contains
> a pointer into user memory. If userland is 32-bit and kernel is 64-bit
> the two disagree about the layout of struct sock_fprog.
> 
> Add compat setsockopt support to convert a 32-bit compat_sock_fprog to
> a 64-bit sock_fprog. This is analogous to compat_sock_fprog support for
> SO_REUSEPORT added in commit 1957598840f4 ("soreuseport: add compat
> case for setsockopt SO_ATTACH_REUSEPORT_CBPF").
> 
> Reported-by: Daniel Borkmann <daniel@...earbox.net>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied.