netdev - Re: [PATCH] ebpf: emit correct src

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Message-Id: <20150911.145302.294634270302062884.davem@davemloft.net>
Date:	Fri, 11 Sep 2015 14:53:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	tycho.andersen@...onical.com
Cc:	ast@...nel.org, netdev@...r.kernel.org, daniel@...earbox.net
Subject: Re: [PATCH] ebpf: emit correct src_reg for conditional jumps

From: Tycho Andersen <tycho.andersen@...onical.com>
Date: Thu, 10 Sep 2015 18:25:07 -0600

> Instead of always emitting BPF_REG_X, let's emit BPF_REG_X only when the
> source actually is BPF_X. This causes programs generated by the classic
> converter to not be importable via bpf(), as the eBPF verifier checks that
> the src_reg is correct or 0. While not a problem yet, this will be a
> problem when BPF_PROG_DUMP lands, and we can potentially dump and re-import
> programs generated by the converter.
> 
> Signed-off-by: Tycho Andersen <tycho.andersen@...onical.com>

Applied, thanks.
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