linux-kernel - Re: [PATCH v9 3/5] crypto: drbg

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Message-ID: <20150520214408.GA17264@gondor.apana.org.au>
Date:	Thu, 21 May 2015 05:44:08 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	pebolle@...cali.nl, andreas.steffen@...ongswan.org, tytso@....edu,
	sandyinchina@...il.com, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 3/5] crypto: drbg - add async seeding operation

On Wed, May 20, 2015 at 10:03:45PM +0200, Stephan Mueller wrote:
>> @@ -1487,6 +1514,7 @@ unlock:
>   */
>  static int drbg_uninstantiate(struct drbg_state *drbg)
>  {
> +	cancel_work_sync(&drbg->seed_work);

This will just block until the work is done, i.e., until the
pool is ready.  It's no different to an uninterruptible sleep.

So either just do an uninterruptible sleep, or allow the async
seed to fail.

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
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