linux-kernel - Re: [PATCH v4 01/29] bluetooth: Switch SMP to crypto_cipher_encrypt

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Message-Id: <8C5360E3-94EE-4869-B9B9-AF9D41B5A3AC@holtmann.org>
Date:	Mon, 27 Jun 2016 07:58:33 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Andy Lutomirski <luto@...nel.org>
Cc:	x86@...nel.org, LKML <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org, Borislav Petkov <bp@...en8.de>,
	Nadav Amit <nadav.amit@...il.com>,
	Kees Cook <keescook@...omium.org>,
	Brian Gerst <brgerst@...il.com>,
	"kernel-hardening@...ts.openwall.com" 
	<kernel-hardening@...ts.openwall.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Jann Horn <jann@...jh.net>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"Gustavo F. Padovan" <gustavo@...ovan.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v4 01/29] bluetooth: Switch SMP to crypto_cipher_encrypt_one()

Hi Andy,

> SMP does ECB crypto on stack buffers.  This is complicated and
> fragile, and it will not work if the stack is virtually allocated.
> 
> Switch to the crypto_cipher interface, which is simpler and safer.
> 
> Cc: Marcel Holtmann <marcel@...tmann.org>
> Cc: Gustavo Padovan <gustavo@...ovan.org>
> Cc: Johan Hedberg <johan.hedberg@...il.com>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: linux-bluetooth@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
> Acked-and-tested-by: Johan Hedberg <johan.hedberg@...el.com>
> Signed-off-by: Andy Lutomirski <luto@...nel.org>
> ---
> net/bluetooth/smp.c | 67 ++++++++++++++++++++++-------------------------------
> 1 file changed, 28 insertions(+), 39 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel