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Date: Fri, 16 Jun 2017 20:45:57 -0700
From: Lee Duncan <lduncan@...e.com>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Theodore Ts'o <tytso@....edu>,
Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>, kernel-hardening@...ts.openwall.com,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
David Miller <davem@...emloft.net>, Eric Biggers <ebiggers3@...il.com>,
"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
Chris Leech <cleech@...hat.com>, open-iscsi@...glegroups.com
Subject: Re: Re: [PATCH v4 06/13] iscsi: ensure RNG is
seeded before use
On 06/16/2017 05:41 PM, Jason A. Donenfeld wrote:
> Hi Lee,
>
> On Fri, Jun 16, 2017 at 11:58 PM, Lee Duncan <lduncan@...e.com> wrote:
>> It seems like what you are doing is basically "good", i.e. if there is
>> not enough random data, don't use it. But what happens in that case? The
>> authentication fails? How does the user know to wait and try again?
>
> The process just remains in interruptible (kill-able) sleep until
> there is enough entropy, so the process doesn't need to do anything.
> If the waiting is interrupted by a signal, it returns -ESYSRESTART,
> which follows the usual semantics of restartable syscalls.
>
> Jason
>
In your testing, how long might a process have to wait? Are we talking
seconds? Longer? What about timeouts?
Sorry, but your changing something that isn't exactly broken, so I just
want to be sure we're not introducing some regression, like clients
can't connect the first 5 minutes are a reboot.
--
Lee Duncan
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