linux-kernel - Re: [PATCH v5 3/8] crypto: AF

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Message-ID: <20141222112341.GA19532@gondor.apana.org.au>
Date:	Mon, 22 Dec 2014 22:23:41 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Daniel Borkmann <dborkman@...hat.com>,
	'Quentin Gouchet' <quentin.gouchet@...il.com>,
	'LKML' <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v5 3/8] crypto: AF_ALG: add AEAD support

On Sun, Dec 07, 2014 at 11:22:30PM +0100, Stephan Mueller wrote:
>
> +static inline bool aead_sufficient_data(struct aead_ctx *ctx)
> +{
> +	unsigned as = crypto_aead_authsize(crypto_aead_reqtfm(&ctx->aead_req));
> +
> +	return (ctx->used >= (ctx->aead_assoclen + ctx->enc ? : as ));

Is this supposed to be

	return (ctx->used >= (ctx->aead_assoclen + (ctx->enc ?: as)));

> +static int aead_recvmsg(struct kiocb *unused, struct socket *sock,
> +			    struct msghdr *msg, size_t ignored, int flags)
> +{

...

> +	err = -ENOMEM;
> +	if (!aead_sufficient_data(ctx))
> +		goto unlock;

You should just block if there is insufficient input.

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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