linux-kernel - Re: [PATCH] crypto: af_alg - Fix regression on empty requests

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Date:   Tue, 30 Jun 2020 14:18:11 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        Eric Biggers <ebiggers@...nel.org>
Cc:     Luis Chamberlain <mcgrof@...nel.org>,
        LTP List <ltp@...ts.linux.it>,
        open list <linux-kernel@...r.kernel.org>,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        lkft-triage@...ts.linaro.org,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Jan Stancek <jstancek@...hat.com>, chrubis <chrubis@...e.cz>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        James Morris <jmorris@...ei.org>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        David Howells <dhowells@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sachin Sant <sachinp@...ux.vnet.ibm.com>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux- stable <stable@...r.kernel.org>
Subject: Re: [PATCH] crypto: af_alg - Fix regression on empty requests

On Fri, 26 Jun 2020 at 12:00, Herbert Xu <herbert@...dor.apana.org.au> wrote:
>
> On Tue, Jun 23, 2020 at 10:02:17AM -0700, Eric Biggers wrote:
> >
> > The source code for the two failing AF_ALG tests is here:
> >
> > https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/crypto/af_alg02.c
> > https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/crypto/af_alg05.c
> >
> > They use read() and write(), not send() and recv().
> >
> > af_alg02 uses read() to read from a "salsa20" request socket without writing
> > anything to it.  It is expected that this returns 0, i.e. that behaves like
> > encrypting an empty message.

Since we are on this subject,
LTP af_alg02  test case fails on stable 4.9 and stable 4.4
This is not a regression because the test case has been failing from
the beginning.

Is this test case expected to fail on stable 4.9 and 4.4 ?
or any chance to fix this on these older branches ?

Test output:
af_alg02.c:52: BROK: Timed out while reading from request socket.

ref:
https://qa-reports.linaro.org/lkft/linux-stable-rc-4.9-oe/build/v4.9.228-191-g082e807235d7/testrun/2884917/suite/ltp-crypto-tests/test/af_alg02/history/
https://qa-reports.linaro.org/lkft/linux-stable-rc-4.9-oe/build/v4.9.228-191-g082e807235d7/testrun/2884606/suite/ltp-crypto-tests/test/af_alg02/log

- Naresh