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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 5 Apr 2022 19:40:17 +0200
From:   "Jason A. Donenfeld" <>
To:     Kees Cook <>
Cc:,,, PaX Team <>
Subject: Re: [PATCH v2] gcc-plugins: latent_entropy: use /dev/urandom

Hi Kees,

On 4/5/22, Kees Cook <> wrote:
> v3 uses a different check for the -f option, though? Isn't that
> preferred over the v2 method?

Based on the code comments, I assume this is gcc upstream's intended
method. It strikes me as worse, though, because that variable, when
it's not set to -1, is set to: `local_tick = (unsigned) tv.tv_sec *
1000 + tv.tv_usec / 1000;` which is on occasion unlucky and hits -1
too. But maybe that's a bug in gcc that should be fixed instead? I
don't know really. But anyway that's why I'm /also/ more into that
aspect of v2.

> Also, I did some quick benchmarking, and any difference in runtime is
> completely lost in the noise, so that's good.

Oh good to hear. So my 2k buffer is fine then.


Powered by blists - more mailing lists