From:   Nicolai Stange <nstange@suse.de>
To:     =?UTF-8?q?Stephan=20M=C3=BCller?= <smueller@chronox.de>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>
Cc:     Torsten Duwe <duwe@suse.de>, linux-crypto@vger.kernel.org,
        linux-kernel@vger.kernel.org, Nicolai Stange <nstange@suse.de>
Subject: [PATCH 0/3] crypto: jitterentropy - bound collection loop
Date:   Tue, 30 Nov 2021 15:10:06 +0100
Message-Id: <20211130141009.6791-1-nstange@suse.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Hi,

the sampling loop in jent_gen_entropy() can potentially run indefinitely
w/o making any forward progress, namely if only stuck samples are taken
for whatever reason.

There's a straight-forward way to make the entropy collection more robust,
namely to terminate the loop and report an error if this happens. This
patchset here implements that.

Applies to herbert/cryptodev-2.6.git master.

Thanks!

Nicolai

Nicolai Stange (3):
  crypto: drbg - ignore jitterentropy errors if not in FIPS mode
  crypto: jitter - don't limit ->health_failure check to FIPS mode
  crypto: jitter - quit sample collection loop upon RCT failure

 crypto/drbg.c                | 7 +++++--
 crypto/jitterentropy-kcapi.c | 6 ------
 crypto/jitterentropy.c       | 6 +-----
 crypto/jitterentropy.h       | 1 -
 4 files changed, 6 insertions(+), 14 deletions(-)

-- 
2.26.2