linux-kernel - Re: crypto: algif_hash: creating 0 sized array in hash

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Message-ID: <20160126140724.GA22685@gondor.apana.org.au>
Date:	Tue, 26 Jan 2016 22:07:24 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	"open list:CRYPTO API" <linux-crypto@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: crypto: algif_hash: creating 0 sized array in hash_accept

On Tue, Jan 26, 2016 at 08:26:41AM -0500, Sasha Levin wrote:
>
> This seems to be happening with "digest_null".

In that case this is expected as digest_null obviously has no
state.  So why is a zero-length array disallowed by ubsan?

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