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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 17 Jan 2018
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      Hector Martin Retweeted Ridley @ a safe distance

      Oh for fuck's sake more shitty names. Heartbleed was a great name and technical pun. Shellshock was boring. Meltdown is generic garbage. Spectre isn't even clever. "Skyfall", whatever it is, is even worse. Can we stop this race to the bottom please?https://twitter.com/11rcombs/status/953859524645015552 …

      Hector Martin added,

      Ridley @ a safe distance @11rcombs
      WELP https://skyfallattack.com 
      Show this thread
      14 replies 13 retweets 49 likes
      Show this thread
    2. Pup Pastel, the safety dog‏ @raincoatsthepig 18 Jan 2018
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      Replying to @marcan42

      spectre was a good name i think because this is a security bug that went un-noticed for decades, so it could be described as stealthy, like a ghost

      1 reply 0 retweets 0 likes
    3. Hector Martin‏ @marcan42 18 Jan 2018
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      Replying to @raincoatsthepig

      But it doesn't tell you anything about the actual problem. And it's one name for two problems. How'd they manage *that*?

      1 reply 0 retweets 2 likes
    4. Pup Pastel, the safety dog‏ @raincoatsthepig 18 Jan 2018
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      Replying to @marcan42

      a better name would be like "specread" or something, since afaik it allows you to read all the contents of memory by using SPECulative execution

      1 reply 0 retweets 1 like
    5. Hector Martin‏ @marcan42 18 Jan 2018
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      Replying to @raincoatsthepig

      Nope. *Neither* of the two Spectre issues is specific to memory reads. One is about leaks from mispredicted direct branches, the other is about mistraining the indirect branch predictor to leak. Neither specifies *what* you leak and the possibilities depend on code sequences.

      1 reply 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 18 Jan 2018
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      Replying to @marcan42

      The key point here is *branch misprediction*, not speculative execution. Speculative execution is the class of problem but branch misprediction is the specific situation that qualifies those specific vulns (as compared to Meltdown, which *is* about memory reads from the kernel).

      1 reply 0 retweets 0 likes
    7. Pup Pastel, the safety dog‏ @raincoatsthepig 18 Jan 2018
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      Replying to @marcan42

      so i guess meltdown should be "branchread" and spectre should be "branchleak" and "branchtrain"

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 18 Jan 2018
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      Replying to @raincoatsthepig

      Hector Martin Retweeted Hector Martin

      Meltdown isn't about branches. These are the names I suggested (also you can call the whole class SEXYPETCAT: Speculative EXecution Yields Privilege Escalation Through Cache Attacks :P)https://twitter.com/marcan42/status/953876003486445568 …

      Hector Martin added,

      Hector Martin @marcan42
      Heck I think I can come up with better names in 10 minutes. SideMiss (Side channel attack on misprediction), BrainHijack (Branch-Indirect Hijack), SpeckLeak (Speculative Kernel Leak) for Variants 1-3 respectively.
      Show this thread
      12:26 AM - 18 Jan 2018
      • 4 Retweets
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      • andrewlica . Jordan Matt Ginzton
      1 reply 4 retweets 2 likes
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        1. Pup Pastel, the safety dog‏ @raincoatsthepig 18 Jan 2018
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          Replying to @marcan42

          oh i had assumed meltdown and spectre were fundamentally similar because everyone writing about them is lumping them together.

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 18 Jan 2018
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          Replying to @raincoatsthepig

          All three problems involve speculative execution. They could've all been grouped under one umbrella name referencing that, though that wouldn't be as useful. That category is then broken down into specific problems. A blatant CPU bug, a not-so-obvious CPU bug, and a mess.

          1 reply 0 retweets 0 likes
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