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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 14 Mar 2018
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      • Report NetzDG Violation

      I wonder if any of the people crying "omg secure boot is dead, if I get owned I could have malware forever in my BIOS" are actually running a proper secure boot system with all the obvious backdoorable parts secured (at least those you can do anything about).

      2 replies 8 retweets 30 likes
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    2. Hector Martin‏ @marcan42 14 Mar 2018
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      That means all the firmware on your add-in cards and miscellaneous perioherals has to be signed and measured at boot. Everything must have anti-rollback protection. Yes, that includes your Ethernet and USB3 and SAS controllers. And your GPU. And a zillion other things.

      2 replies 1 retweet 11 likes
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    3. Hector Martin‏ @marcan42 14 Mar 2018
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      And I hope you're running with a full IOMMU implementation. And you've certainly audited all the drivers to make sure they aren't trivially exploitable (hint: most are). And you're using a TPM to hold all your keys outside the CPU.

      2 replies 0 retweets 10 likes
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    4. Thomas Daede‏ @enginetankard 14 Mar 2018
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      Replying to @marcan42

      I don't think any distro (other than maybe Qubes) even enables the IOMMU by default. Kind of a rude discovery when I was trying out vfio.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 14 Mar 2018
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      Replying to @enginetankard

      And this is how IOMMU support never improves. I had to send in a patch to make my FireWire controller work with IOMMU (hardware bug workaround), and I still get random crap-outs that break Ethernet once in a while.

      3:58 PM - 14 Mar 2018
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      • Thomas Daede
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