linux-kernel - Re: [PATCH v4 2/2] tpm: add support for nonblocking operation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1533926908.3143.6.camel@HansenPartnership.com>
Date:   Fri, 10 Aug 2018 11:48:28 -0700
From:   James Bottomley <James.Bottomley@...senPartnership.com>
To:     Tadeusz Struk <tadeusz.struk@...el.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     flihp@...bit.us, jgg@...pe.ca, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] tpm: add support for nonblocking operation

On Fri, 2018-08-10 at 11:21 -0700, Tadeusz Struk wrote:
> and the feedback I got from Jason was:
> 
> "I wonder if it is worth creating this when the first file is
> opened.. Lots of systems have TPMs but few use the userspace.."
> 
> so I changed this to allocate the WQ on first open. I think it makes
> sense, but I leave it to you to decide.

If the reason is to not create a wq unless it's needed, shouldn't the
condition actually be first open with flag O_NONBLOCK?

James