netdev - Re: [PATCH net] x86: bpf_jit: fix FROM_BE16 and FROM

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Message-Id: <20150512.231409.160408009979608790.davem@davemloft.net>
Date:	Tue, 12 May 2015 23:14:09 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ast@...mgrid.com
Cc:	daniel@...earbox.net, netdev@...r.kernel.org
Subject: Re: [PATCH net] x86: bpf_jit: fix FROM_BE16 and FROM_LE16/32
 instructions

From: Alexei Starovoitov <ast@...mgrid.com>
Date: Mon, 11 May 2015 23:25:16 -0700

> FROM_BE16:
> 'ror %reg, 8' doesn't clear upper bits of the register,
> so use additional 'movzwl' insn to zero extend 16 bits into 64
> 
> FROM_LE16:
> should zero extend lower 16 bits into 64 bit
> 
> FROM_LE32:
> should zero extend lower 32 bits into 64 bit
> 
> Fixes: 89aa075832b0 ("net: sock: allow eBPF programs to be attached to sockets")
> Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>

Applied and queued up for -stable, thank you.
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