[bug] crypto/vmx/p8_ghash memory corruption in 4.8-rc7

[Herbert Xu]

On Tue, Sep 27, 2016 at 05:01:03AM -0400, Jan Stancek wrote:
> 
> Also, does that mean that padlock_sha has similar problem?
> It does not seem to reserve any space for fallback __ctx and it calls
> init()/update()/export() with padlock_sha_desc's fallback:
> 
> struct padlock_sha_desc {
>         struct shash_desc fallback;
> };
> 
> static struct shash_alg sha1_alg = {
>         .descsize       =       sizeof(struct padlock_sha_desc),

Actually I was wrong when I said that the API couldn't handle
a dynamic fallback.  It can and padlock-sha does the right thing
by updating descsize in the cra_init function.

So this is what vmx should do too.

Thanks,
-- 
Email: Herbert Xu <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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