lkml.org 
[lkml]   [2016]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Remaining crypto API regressions with CONFIG_VMAP_STACK
On Mon, Dec 12, 2016 at 10:34:10AM -0800, Andy Lutomirski wrote:
>
> Here's my status.
>
> > drivers/crypto/bfin_crc.c:351
> > drivers/crypto/qce/sha.c:299
> > drivers/crypto/sahara.c:973,988
> > drivers/crypto/talitos.c:1910
> > drivers/crypto/qce/sha.c:325
>
> I have a patch to make these depend on !VMAP_STACK.

Why? They're all marked as ASYNC AFAIK.

> I have a patch to convert this to, drumroll please:
>
> priv->tx_tfm_mic = crypto_alloc_shash("michael_mic", 0,
> CRYPTO_ALG_ASYNC);
>
> Herbert, I'm at a loss as what a "shash" that's "ASYNC" even means.

Having 0 as type and CRYPTO_ALG_ASYNC as mask in general means
that we're requesting a sync algorithm (i.e., ASYNC bit off).

However, it is completely unnecessary for shash as they can never
be async. So this could be changed to just ("michael_mic", 0, 0).

> > net/ceph/crypto.c:182
>
> This:
>
> size_t zero_padding = (0x10 - (src_len & 0x0f));
>
> is an amazing line of code...
>
> But this driver uses cbc and wants to do synchronous crypto, and I
> don't think that the crypto API supports real synchronous crypto using
> CBC, so I'm going to let someone else fix this.

It does through skcipher if you allocate with (0, CRYPTO_ALG_ASYNC).

I'll try to fix this.

> > net/rxrpc/rxkad.c:737,1000
>
> Herbert, can you fix this?

Sure I'll take a look.

Thanks,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

\
 
 \ /
  Last update: 2016-12-13 04:40    [W:0.113 / U:0.428 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site