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Message-ID: <502882.59497.qm@web180306.mail.gq1.yahoo.com>
Date: Sat, 6 Nov 2010 11:30:40 -0700 (PDT)
From: David Brownell <david-b@pacbell.net>
Subject: Re: [PATCH] usb: core: fix information leak to userland
To: Vasiliy Kulikov <segooon@gmail.com>,
        Alan Stern <stern@rowland.harvard.edu>
Cc: kernel-janitors@vger.kernel.org, Greg Kroah-Hartman <gregkh@suse.de>,
        Oliver Neukum <oliver@neukum.org>, Andi Kleen <ak@linux.intel.com>,
        Chris Frey <cdfrey@foursquare.net>, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org
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--- On Sat, 11/6/10, Alan Stern <stern@rowland.harvard.edu> wrote:

> Are you sure that adding an initializer
> like this will zero out the 
> padding bytes?? It might be safer just to call
> memset.

ISTR the C standard says things get initted to
zero in this case too ... and that compilers will
as a rule use memset to do it.  One could look
at the generated code to make sure of that.

There's certainly a fair amount of code I've seen
that uses runtime initializers like that, to zero
memory.  I can't believe i's _all_ broken!  ;)

- Dave


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