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Date: Sat, 10 Jun 2017 15:49:28 +0200
From: Marcel Holtmann <>
To: "Jason A. Donenfeld" <>
Cc: LKML <>,,
 "Gustavo F. Padovan" <>,
 Johan Hedberg <>,,
Subject: Re: [PATCH 5/6] bluetooth/smp: use constant time memory comparison
 for secret values

Hi Jason,

> This file is filled with complex cryptography. Thus, the comparisons of
> MACs and secret keys and curve points and so forth should not add timing
> attacks, which could either result in a direct forgery, or, given the
> complexity, some other type of attack.
> Signed-off-by: Jason A. Donenfeld <>
> Cc: Marcel Holtmann <>
> Cc: Gustavo Padovan <>
> Cc: Johan Hedberg <>
> Cc:
> Cc:
> ---
> net/bluetooth/smp.c | 39 ++++++++++++++++++++-------------------
> 1 file changed, 20 insertions(+), 19 deletions(-)

patch has been applied to bluetooth-next tree.



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