linux-kernel - Re: [PATCH net-next v7 0/2] bpf: add bpf_probe_write

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Date:	Mon, 25 Jul 2016 18:08:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sargun@...gun.me
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	alexei.starovoitov@...il.com, daniel@...earbox.net
Subject: Re: [PATCH net-next v7 0/2] bpf: add bpf_probe_write_user helper &
 example

From: Sargun Dhillon <sargun@...gun.me>
Date: Mon, 25 Jul 2016 05:54:29 -0700

> This patch series contains two patches that add support for a probe_write
> helper to BPF programs. This allows them to manipulate user memory during
> the course of tracing. The second patch in the series has an example that
> uses it, in one the intended ways to divert execution.
> 
> Thanks to Alexei Starovoitov, and Daniel Borkmann for being patient, review, and 
> helping me get familiar with the code base. I've made changes based on their 
> recommendations.
> 
> This helper should be considered for experimental usage and debugging, so we
> print a warning to dmesg when it is along with the command and pid when someone
> tries to install a proglet that uses it. A follow-up patchset will contain a
> mechanism to verify the safety of the probe beyond what was done by hand.

Series applied, thanks.