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Date: Mon, 27 Jul 2020 18:23:57 +0200
From: Christoph Hellwig <>
To: "Jason A. Donenfeld" <>
Cc: Christoph Hellwig <>, "David S. Miller" <>,
	Jakub Kicinski <>,
	Alexei Starovoitov <>,
	Daniel Borkmann <>,
	Alexey Kuznetsov <>,
	Hideaki YOSHIFUJI <>,
	Eric Dumazet <>,
	Linux Crypto Mailing List <>,
	LKML <>,
	Netdev <>,,,,,,,,,,,,,,,,,,,
	Kernel Hardening <>
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

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