netdev - Re: [PATCH 1/2] umh: Add command line to user mode helpers

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Date:   Mon, 22 Oct 2018 19:37:46 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jjk@...cky.com
Cc:     netdev@...r.kernel.org, alexei.starovoitov@...il.com,
        daniel@...earbox.net, mcgrof@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] umh: Add command line to user mode helpers

From: Olivier Brunel <jjk@...cky.com>
Date: Sat, 20 Oct 2018 19:39:56 +0200

> User mode helpers were spawned without a command line, and because
> an empty command line is used by many tools to identify processes as
> kernel threads, this could cause some issues.
> 
> Notably during killing spree on shutdown, since such helper would then
> be skipped (i.e. not killed) which would result in the process remaining
> alive, and thus preventing unmouting of the rootfs (as experienced with
> the bpfilter umh).
> 
> Fixes: 449325b52b7a ("umh: introduce fork_usermode_blob() helper")
> Signed-off-by: Olivier Brunel <jjk@...cky.com>

Applied.