some quick notes on how the SIOCETHTOOL ioctl bounds itself to acting within a caller’s network namespace. tl;dr it’s based on the network namespace of the socket the ioctl was called on, e.g. ioctl(sock, SIOCETHTOOL, &ifr)https://gist.github.com/jleadford/4f6c181a0929e461a1a16b352527de80 …
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there’s a separate CAP_NET_ADMIN check, too https://elixir.bootlin.com/linux/v5.4.11/source/net/core/ethtool.c#L2621 …
22:59 - 13. sij 2020.
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