From: Vitaly Chikunov <vt@altlinux.org>
To: David Howells <dhowells@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Mimi Zohar <zohar@linux.ibm.com>,
linux-integrity@vger.kernel.org, keyrings@vger.kernel.org,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms
Date: Thu, 28 Feb 2019 22:07:42 +0300 [thread overview]
Message-ID: <20190228190741.fv2qxwwtlpdffhwq@altlinux.org> (raw)
In-Reply-To: <17533.1551380529@warthog.procyon.org.uk>
David,
On Thu, Feb 28, 2019 at 07:02:09PM +0000, David Howells wrote:
> | > It's not clear that sig->digest is guaranteed to be kmalloc memory.
>
> Well, public_key_signature_free() will go bang if it's not kfree'able.
Well, I had similar argument, FYI:
| On Fri, Feb 01, 2019 at 10:09:23AM +0300, Vitaly Chikunov wrote:
| > On Fri, Feb 01, 2019 at 02:26:55PM +0800, Herbert Xu wrote:
| > >
| > > It's not clear that sig->digest is guaranteed to be kmalloc memory.
| > > In any case, it's best not to mix unrelated changes in a single
| > > patch. So please keep the kmalloc on output and then copy
| > > sig->digest into it and put output into the SG list.
| >
| > It is not guaranteed that sig->s will be kmalloc memory either. (Except
| > we know it for sure like we know the same about sig->digest).
| >
| > You can see in public_key_signature_free() that both fields are kfree'd
| > together.
| >
| > So, I don't understand why we should treat sig->digest differently than
| > sig->s.
| >
| > I was just removing kmalloc'ed output as crypto_akcipher_verify() does
| > not need any output anymore. So, it's not some sort of mixing unrelated
| > changes, from my point of view.
But then I thought Herbert knows better and implemented his suggestion.
Now I have contradictory requests from two maintainers.
next prev parent reply other threads:[~2019-02-28 19:07 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-24 6:08 [PATCH v5 00/10] crypto: add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 01/10] KEYS: report to keyctl only actually supported key ops Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 02/10] crypto: akcipher - check the presence of callback before the call Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 03/10] crypto: rsa - unimplement sign/verify for raw RSA backends Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms Vitaly Chikunov
2019-02-27 23:28 ` Mimi Zohar
2019-02-28 5:37 ` Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 05/10] X.509: parse public key parameters from x509 for akcipher Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 06/10] crypto: Kconfig - create Public-key cryptography section Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 07/10] crypto: ecc - make ecc into separate module Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 08/10] crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 09/10] crypto: ecrdsa - add EC-RDSA test vectors to testmgr Vitaly Chikunov
2019-02-24 6:08 ` [PATCH v5 10/10] integrity: support EC-RDSA signatures for asymmetric_verify Vitaly Chikunov
2019-02-25 21:20 ` Thiago Jung Bauermann
2019-02-26 4:25 ` Vitaly Chikunov
2019-02-26 12:07 ` Mimi Zohar
2019-02-28 18:18 ` [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms David Howells
2019-02-28 18:39 ` Vitaly Chikunov
2019-02-28 19:02 ` David Howells
2019-02-28 19:07 ` Vitaly Chikunov [this message]
2019-03-01 2:34 ` Herbert Xu
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