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Re: [PATCH 12/24] bpfilter: switch bpfilter_ip_set_sockopt to sockptr_t

To: David Laight <David.Laight@xxxxxxxxxx>
Subject: Re: [PATCH 12/24] bpfilter: switch bpfilter_ip_set_sockopt to sockptr_t
Cc: 'Christoph Hellwig' <hch@xxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>, Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>, Eric Dumazet <edumazet@xxxxxxxxxx>, "linux-crypto@xxxxxxxxxxxxxxx" <linux-crypto@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "netdev@xxxxxxxxxxxxxxx" <netdev@xxxxxxxxxxxxxxx>, "bpf@xxxxxxxxxxxxxxx" <bpf@xxxxxxxxxxxxxxx>, "netfilter-devel@xxxxxxxxxxxxxxx" <netfilter-devel@xxxxxxxxxxxxxxx>, "coreteam@xxxxxxxxxxxxx" <coreteam@xxxxxxxxxxxxx>, "linux-sctp@xxxxxxxxxxxxxxx" <linux-sctp@xxxxxxxxxxxxxxx>, "linux-hams@xxxxxxxxxxxxxxx" <linux-hams@xxxxxxxxxxxxxxx>, "linux-bluetooth@xxxxxxxxxxxxxxx" <linux-bluetooth@xxxxxxxxxxxxxxx>, "bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx" <bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx>, "linux-can@xxxxxxxxxxxxxxx" <linux-can@xxxxxxxxxxxxxxx>, "dccp@xxxxxxxxxxxxxxx" <dccp@xxxxxxxxxxxxxxx>, "linux-decnet-user@xxxxxxxxxxxxxxxxxxxxx" <linux-decnet-user@xxxxxxxxxxxxxxxxxxxxx>, "linux-wpan@xxxxxxxxxxxxxxx" <linux-wpan@xxxxxxxxxxxxxxx>, "linux-s390@xxxxxxxxxxxxxxx" <linux-s390@xxxxxxxxxxxxxxx>, "mptcp@xxxxxxxxxxxx" <mptcp@xxxxxxxxxxxx>, "lvs-devel@xxxxxxxxxxxxxxx" <lvs-devel@xxxxxxxxxxxxxxx>, "rds-devel@xxxxxxxxxxxxxx" <rds-devel@xxxxxxxxxxxxxx>, "linux-afs@xxxxxxxxxxxxxxxxxxx" <linux-afs@xxxxxxxxxxxxxxxxxxx>, "tipc-discussion@xxxxxxxxxxxxxxxxxxxxx" <tipc-discussion@xxxxxxxxxxxxxxxxxxxxx>, "linux-x25@xxxxxxxxxxxxxxx" <linux-x25@xxxxxxxxxxxxxxx>
From: 'Christoph Hellwig' <hch@xxxxxx>
Date: Wed, 22 Jul 2020 10:00:23 +0200
On Tue, Jul 21, 2020 at 08:36:57AM +0000, David Laight wrote:
> From: Christoph Hellwig
> > Sent: 20 July 2020 13:47
> > 
> > This is mostly to prepare for cleaning up the callers, as bpfilter by
> > design can't handle kernel pointers.
>                       ^^^ user ??

No, it can't handle user pointers. 

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