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Date:   Mon, 27 Jul 2020 18:23:57 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc:     Christoph Hellwig <hch@lst.de>,
        "David S. Miller" <davem@davemloft.net>,
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Subject: Re: [PATCH 12/26] netfilter: switch nf_setsockopt to sockptr_t
Message-ID: <20200727162357.GA8022@lst.de>
References: <20200723060908.50081-1-hch@lst.de> <20200723060908.50081-13-hch@lst.de> <20200727150310.GA1632472@zx2c4.com> <20200727150601.GA3447@lst.de> <CAHmME9ric=chLJayn7Erve7WBa+qCKn-+Gjri=zqydoY6623aA@mail.gmail.com>
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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.