linux-kernel - Re: [PATCH v2] crypto: remove instance when test failed

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Message-ID: <20150403155246.GA21458@gondor.apana.org.au>
Date:	Fri, 3 Apr 2015 23:52:46 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] crypto: remove instance when test failed

On Fri, Apr 03, 2015 at 05:17:13PM +0200, Stephan Mueller wrote:
>
> Wpuldn't crypto_del_alg suffer from the same issue? I see that the cra_refcnt 
> is checked. But I guess there would be the same kind of race?

You're quite right.  It too needs to take a ref count on the
algorithm in crypto_alg_match before releasing the mutex.

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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