netdev - Re: [PATCH net-next] bpf: add test for the verifier equal logic bug

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Message-Id: <20161130.145213.1255113466074431974.davem@davemloft.net>
Date:   Wed, 30 Nov 2016 14:52:13 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     jbacik@...com
Cc:     netdev@...r.kernel.org, ast@...nel.org, jannh@...gle.com,
        daniel@...earbox.net, kernel-team@...com
Subject: Re: [PATCH net-next] bpf: add test for the verifier equal logic bug

From: Josef Bacik <jbacik@...com>
Date: Tue, 29 Nov 2016 12:35:19 -0500

> This is a test to verify that
> 
> bpf: fix states equal logic for varlen access
> 
> actually fixed the problem.  The problem was if the register we added to our map
> register was UNKNOWN in both the false and true branches and the only thing that
> changed was the range then we'd incorrectly assume that the true branch was
> valid, which it really wasnt.  This tests this case and properly fails without
> my fix in place and passes with it in place.
> 
> Signed-off-by: Josef Bacik <jbacik@...com>

Applied.