linux-kernel - Re: /proc/timer_list and weird behavior with dropbear

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Date:	Fri, 19 Jul 2013 10:45:15 -0500
From:	Nathan Zimmer <nzimmer@....com>
To:	Holger Hans Peter Freyther <holger@...yther.de>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: /proc/timer_list and weird behavior with dropbear

On 07/19/2013 10:28 AM, Holger Hans Peter Freyther wrote:
> Dear Nathan,
>
> I am currently upgrading a kernel for a TI Davinci DM644x based design
> from Linux 3.2 to Linux 3.10.1. I have a funny re-producible issue that
> goes away by reverting b3956a896ea57f25cacd74708b8fab611543a81d.
>
> The dropbear sshd will open several files after accepting a connection to
> generate some entropy. The "/proc/timer_list" file is part of that[1].
> It will open that file and will try to read until the end of the file, but
> most of the time this end never comes. According to strace the read on the
> fd will always return 2048. I have attached the testcase I am using to
> re-produce the issue.
>
> Can this be re-produced by anyone else?
>
> holger
>
>
>
> [1] https://secure.ucc.asn.au/hg/dropbear/file/028fa77f952f/random.c#l204
>
I hadn't noticed anything.
Let me try your program and see what I may have missed.
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