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Date: Mon, 27 Jul 2020 18:23:57 +0200
From: Christoph Hellwig <hch@....de>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Christoph Hellwig <hch@....de>, "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Eric Dumazet <edumazet@...gle.com>,
Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Netdev <netdev@...r.kernel.org>, bpf@...r.kernel.org,
netfilter-devel@...r.kernel.org, coreteam@...filter.org,
linux-sctp@...r.kernel.org, linux-hams@...r.kernel.org,
linux-bluetooth@...r.kernel.org, bridge@...ts.linux-foundation.org,
linux-can@...r.kernel.org, dccp@...r.kernel.org,
linux-decnet-user@...ts.sourceforge.net, linux-wpan@...r.kernel.org,
linux-s390@...r.kernel.org, mptcp@...ts.01.org,
lvs-devel@...r.kernel.org, rds-devel@....oracle.com,
linux-afs@...ts.infradead.org,
tipc-discussion@...ts.sourceforge.net, linux-x25@...r.kernel.org,
Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH 12/26] netfilter: switch nf_setsockopt to sockptr_t
On Mon, Jul 27, 2020 at 06:16:32PM +0200, Jason A. Donenfeld wrote:
> Maybe sockptr_advance should have some safety checks and sometimes
> return -EFAULT? Or you should always use the implementation where
> being a kernel address is an explicit bit of sockptr_t, rather than
> being implicit?
I already have a patch to use access_ok to check the whole range in
init_user_sockptr.
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