linux-kernel - Re: Remaining crypto API regressions with CONFIG_VMAP

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Date:   Sun, 11 Dec 2016 11:13:55 -0800
From:   Andy Lutomirski <luto@...capital.net>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     linux-crypto@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Andrew Lutomirski <luto@...nel.org>,
        Stephan Mueller <smueller@...onox.de>
Subject: Re: Remaining crypto API regressions with CONFIG_VMAP_STACK

On Fri, Dec 9, 2016 at 3:08 PM, Eric Biggers <ebiggers3@...il.com> wrote:
> In the 4.9 kernel, virtually-mapped stacks will be supported and enabled by
> default on x86_64.  This has been exposing a number of problems in which
> on-stack buffers are being passed into the crypto API, which to support crypto
> accelerators operates on 'struct page' rather than on virtual memory.
>

>         fs/cifs/smbencrypt.c:96

This should use crypto_cipher_encrypt_one(), I think.

--Andy