From: David Miller <davem@davemloft.net>
To: cernekee@chromium.org
Cc: johannes.berg@intel.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, daniel@iogearbox.net,
dsahern@gmail.com
Subject: Re: [PATCH V2] netlink: Add netns check on taps
Date: Wed, 06 Dec 2017 15:57:14 -0500 (EST) [thread overview]
Message-ID: <20171206.155714.908446002721815545.davem@davemloft.net> (raw)
In-Reply-To: <1512591147-29618-1-git-send-email-cernekee@chromium.org>
From: Kevin Cernekee <cernekee@chromium.org>
Date: Wed, 6 Dec 2017 12:12:27 -0800
> Currently, a nlmon link inside a child namespace can observe systemwide
> netlink activity. Filter the traffic so that nlmon can only sniff
> netlink messages from its own netns.
>
> Test case:
>
> vpnns -- bash -c "ip link add nlmon0 type nlmon; \
> ip link set nlmon0 up; \
> tcpdump -i nlmon0 -q -w /tmp/nlmon.pcap -U" &
> sudo ip xfrm state add src 10.1.1.1 dst 10.1.1.2 proto esp \
> spi 0x1 mode transport \
> auth sha1 0x6162633132330000000000000000000000000000 \
> enc aes 0x00000000000000000000000000000000
> grep --binary abc123 /tmp/nlmon.pcap
>
> Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Applied and queued up for -stable, thanks Kevin.
next prev parent reply other threads:[~2017-12-06 20:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-06 20:12 [PATCH V2] netlink: Add netns check on taps Kevin Cernekee
2017-12-06 20:57 ` David Miller [this message]
2017-12-11 16:13 ` Michal Kubecek
2017-12-11 16:58 ` David Miller
2017-12-11 17:22 ` Michal Kubecek
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