netdev - RE: [PATCH 2/3] sha512: reduce stack usage to safe number

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Date:	Mon, 16 Jan 2012 09:56:41 -0000
From:	"David Laight" <David.Laight@...LAB.COM>
To:	"Alexey Dobriyan" <adobriyan@...il.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>
Cc:	"Herbert Xu" <herbert@...dor.apana.org.au>,
	<linux-crypto@...r.kernel.org>, <netdev@...r.kernel.org>,
	<ken@...elabs.ch>,
	"Steffen Klassert" <steffen.klassert@...unet.com>,
	"Eric Dumazet" <eric.dumazet@...il.com>, <security@...nel.org>
Subject: RE: [PATCH 2/3] sha512: reduce stack usage to safe number

Doesn't this badly overflow W[] ..
 
> +#define SHA512_0_15(i, a, b, c, d, e, f, g, h) \
> +	t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[i];	\
...
> +	for (i = 0; i < 16; i += 8) {
...
> +		SHA512_0_15(i + 7, b, c, d, e, f, g, h, a);
> +	}

	David


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