crypto_ahash_setkey

["Kasatkin, Dmitry" <dmitry.kasatkin@xxxxxxxxx>]

Hi,

I have noticed very odd behavior with hmac calculation on my dual
core, 4 HTs PC.
I am using async hash API to to calculate hmac over the page.
I am using "hmac(sha1)" and the same key to calculate different pages.

I have a work queue, which calculates the hmac like...

int()
{
    tfm = crypto_alloc_ahash(...);
}

work_task()
{
     crypto_ahash_setkey(tfm, key, keylen);
     crypto_ahash_digest(req);
}

HMAC result "sometimes" is incorrect.

But when I move crypto_ahash_setkey() do the initialization code then
HMAC result is always correct...
(key is the same, so I can initialize it only once)

int()
{
     tfm = crypto_alloc_ahash(...);
     crypto_ahash_setkey(tfm, key, keylen);
}

work_task()
{
     crypto_ahash_digest(req);
}

It seems that crypto_ahash_setkey() somehow sometimes does wrong things...

I hope my explanation is clear.

Any ideas why it might happen?

Thanks,

- Dmitry
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