Re: v3.17-rc5: alg: skcipher: Test 4 failed on encryption for ctr-aes-aesni

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On Tue, Sep 16, 2014 at 10:01:07PM +0200, Romain Francoise wrote:
> On Mon, Sep 15, 2014 at 10:36:46AM +0200, Romain Francoise wrote:
> > I upgraded from v3.16 to v3.17-rc5 and the ctr-aes-aesni encryption test
> > fails, which makes my IPsec tunnels unhappy (see trace below). Before I
> > start bisecting (2cddcc7df8fd3 is probably my first guess), is this
> > already known?
> 
> > Sep 15 08:07:56 silenus kernel: [   35.137145] alg: skcipher: Test 4 failed on encryption for ctr-aes-aesni [...]
> 
> Update: reverting 2cddcc7df8 ("crypto: aes - AES CTR x86_64 "by8" AVX
> optimization") fixes this. This machine is Sandy Bridge (Core i7-2600),
> and the problem doesn't seem to occur with the exact same kernel image
> on Ivy Bridge (Xeon E3-1240v2).

Thanks for bisecting.  If we can't fix this quickly then we should
just revert it for now.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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