linux-kernel - Re: [PATCH] keys/encrypted: Fix two crypto-on-the-stack bugs

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Message-ID: <2661.1481647538@warthog.procyon.org.uk>
Date:   Tue, 13 Dec 2016 16:45:38 +0000
From:   David Howells <dhowells@...hat.com>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     dhowells@...hat.com, David Laight <David.Laight@...lab.com>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        Eric Biggers <ebiggers3@...il.com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Stephan Mueller <smueller@...onox.de>
Subject: Re: [PATCH] keys/encrypted: Fix two crypto-on-the-stack bugs

Andy Lutomirski <luto@...capital.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