netdev - Re: [PATCH net] net: filter: initialize A and X registers

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Message-Id: <20140423.153529.355887454605859828.davem@davemloft.net>
Date:	Wed, 23 Apr 2014 15:35:29 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ast@...mgrid.com
Cc:	dborkman@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: filter: initialize A and X registers

From: Alexei Starovoitov <ast@...mgrid.com>
Date: Tue, 22 Apr 2014 20:18:57 -0700

> exisiting BPF verifier allows uninitialized access to registers,
> 'ret A' is considered to be a valid filter.
> So initialize A and X to zero to prevent leaking kernel memory
> In the future BPF verifier will be rejecting such filters
> 
> Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>

Applied, thanks.
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