From: Herbert Xu <herbert@gondor.apana.org.au>
To: Gary R Hook <ghook@amd.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
Eric Biggers <ebiggers3@gmail.com>,
linux-crypto@vger.kernel.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
Andrew Lutomirski <luto@kernel.org>,
Stephan Mueller <smueller@chronox.de>
Subject: Re: Remaining crypto API regressions with CONFIG_VMAP_STACK
Date: Tue, 13 Dec 2016 11:39:42 +0800 [thread overview]
Message-ID: <20161213033942.GC5601@gondor.apana.org.au> (raw)
In-Reply-To: <1747e6e9-35dc-48cc-7345-4f0412ba2521@amd.com>
On Mon, Dec 12, 2016 at 12:45:18PM -0600, Gary R Hook wrote:
> On 12/12/2016 12:34 PM, Andy Lutomirski wrote:
>
> <...snip...>
>
> >
> >I have a patch to make these depend on !VMAP_STACK.
> >
> >> drivers/crypto/ccp/ccp-crypto-aes-cmac.c:105,119,142
> >> drivers/crypto/ccp/ccp-crypto-sha.c:95,109,124
> >> drivers/crypto/ccp/ccp-crypto-aes-xts.c:162
> >> drivers/crypto/ccp/ccp-crypto-aes.c:94
> >
> >According to Herbert, these are fine. I'm personally less convinced
> >since I'm very confused as to what "async" means in the crypto code,
> >but I'm going to leave these alone.
>
> I went back through the code, and AFAICT every argument to sg_init_one() in
> the above-cited files is a buffer that is part of the request context. Which
> is allocated by the crypto framework, and therefore will never be on the
> stack.
> Right?
Right.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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next prev parent reply other threads:[~2016-12-13 3:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-09 23:08 Eric Biggers
2016-12-10 5:25 ` Andy Lutomirski
2016-12-10 5:32 ` Herbert Xu
2016-12-10 6:03 ` [kernel-hardening] " Eric Biggers
2016-12-10 8:16 ` Herbert Xu
2016-12-10 8:39 ` Eric Biggers
2016-12-10 5:37 ` Herbert Xu
2016-12-10 6:30 ` [kernel-hardening] " Eric Biggers
2016-12-10 14:45 ` Jason A. Donenfeld
2016-12-10 17:48 ` Andy Lutomirski
2016-12-10 5:55 ` Eric Biggers
2016-12-11 19:13 ` Andy Lutomirski
2016-12-11 23:31 ` Eric Biggers
2016-12-12 18:34 ` Andy Lutomirski
2016-12-12 18:45 ` Gary R Hook
2016-12-13 3:39 ` Herbert Xu [this message]
2016-12-13 3:39 ` Herbert Xu
2016-12-13 17:06 ` Andy Lutomirski
2016-12-14 4:56 ` Herbert Xu
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