From: David Howells <dhowells@redhat.com>
Subject: Re: [PATCH] keys/encrypted: Fix two crypto-on-the-stack bugs
Date: Tue, 13 Dec 2016 16:45:38 +0000
Message-ID: <2661.1481647538@warthog.procyon.org.uk>
References: <CALCETrWsTKq0NOpwiJtB50OU7w99-m82NhPG_Uxs2Fqbpz0LLA@mail.gmail.com> <8c273c9c41f51b34bb3115086f1d776895580637.1481575835.git.luto@kernel.org> <e958f214e8885968be8045ffde813ac339b81178.1481575835.git.luto@kernel.org> <063D6719AE5E284EB5DD2968C1650D6DB023CA99@AcuExch.aculab.com>
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Cc: dhowells@redhat.com, David Laight <David.Laight@aculab.com>,
        Joerg Roedel <joro@8bytes.org>,
        David Woodhouse <dwmw2@infradead.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "keyrings@vger.kernel.org" <keyrings@vger.kernel.org>,
        Eric Biggers <ebiggers3@gmail.com>,
        "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Stephan Mueller <smueller@chronox.de>
To: Andy Lutomirski <luto@amacapital.net>
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Andy Lutomirski <luto@amacapital.net> wrote:

> After all, rodata is ordinary memory, is backed by struct page, etc.

Is that actually true?  I thought some arches excluded the kernel image from
the page struct array to make the array consume less memory.

David