linux-kernel - Re: XTS Crypto Not Found In /proc/crypto Even After Compiled for 4.10.1.

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Message-ID: <20170314092025.GC711@gondor.apana.org.au>
Date:   Tue, 14 Mar 2017 17:20:25 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Nathan Royce <nroycea+kernel@...il.com>, davem@...emloft.net,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: XTS Crypto Not Found In /proc/crypto Even After Compiled for
 4.10.1.

On Mon, Mar 13, 2017 at 07:06:01PM +0200, Krzysztof Kozlowski wrote:
> 
> I bisected this to commit f1c131b45410 ("crypto: xts - Convert to
> skcipher"). The s5p-sss driver stays the same... but the xts changes and
> as a result we have a NULL pointer dereference (actually of value
> 00000004):
> [   18.930195] Unable to handle kernel NULL pointer dereference at virtual address 00000004
> ...
> [   18.972325] [<c0313c98>] (post_crypt) from [<c031408c>] (decrypt_done+0x4c/0x54)
> [   18.972343] [<c031408c>] (decrypt_done) from [<c056309c>] (s5p_aes_interrupt+0x1bc/0x208)
> [   18.972360] [<c056309c>] (s5p_aes_interrupt) from [<c0164930>] (irq_thread_fn+0x1c/0x54)

Well that's hardly surprising since xts prior to this commit used
simple AES as opposed to ecb(aes) so it couldn't have triggered
this bug.

> Any hints?

I'll have a look when I have time but no promises.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt