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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Robᵉʳᵗ Graham X🅂 Max‏ @ErrataRob Jan 2

      Robᵉʳᵗ Graham X🅂 Max Retweeted The Register

      Linus is accepting a change to the Linux kernel that flushes the TLB on system calls. This is an extraordinary performance degradation in order to fix this (as yet unknown) security bug.https://twitter.com/TheRegister/status/948310496742027264 …

      Robᵉʳᵗ Graham X🅂 Max added,

      The RegisterVerified account @TheRegister
      Intel CPUs have a security bug that's forced Linux, Windows kernel redesigns. The fix was almost named FUCKWIT https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ … pic.twitter.com/NE4AL0JUFF
      23 replies 307 retweets 342 likes
      Show this thread
    2. George Ou‏ @GeorgeOu Jan 2
      Replying to @ErrataRob

      Is there a less costly alternative to resolving this bug?

      2 replies 0 retweets 2 likes
    3. Robᵉʳᵗ Graham X🅂 Max‏ @ErrataRob Jan 2
      Replying to @GeorgeOu

      I can't say (I don't know the details of the bug) but I doubt it.

      2 replies 0 retweets 1 like
      Rich Felker‏ @RichFelker Jan 2
      Replying to @ErrataRob @GeorgeOu

      Rich Felker Retweeted Rich Felker

      I suspect one can be built based on this:https://twitter.com/RichFelker/status/947972098781310976 …

      Rich Felker added,

      Rich Felker @RichFelker
      Replying to @scarybeasts
      Interesting alternative mitigation: 64-bit kernel with support for 64-bit user processes disabled, no way to address kernel mem from userspace.
      7:16 PM - 2 Jan 2018
      • 5 Likes
      • Petr Smid Eugene Pirogov Iván Glez. Angullo Martin Howe George Ou
      1 reply 0 retweets 5 likes
        1. New conversation
        2. George Ou‏ @GeorgeOu Jan 2
          Replying to @RichFelker @ErrataRob

          That's pretty damn clever, and many user processes don't actually benefit from 64-bit capability.

          2 replies 0 retweets 0 likes
        3. Franz Geiger‏ @justfortherec Jan 3
          Replying to @GeorgeOu @RichFelker @ErrataRob

          Except those requiring more memory than addressable with 32 bits.

          1 reply 0 retweets 0 likes
        4. Matteo Panella‏ @rfc1459 Jan 3
          Replying to @justfortherec @GeorgeOu and

          Like every DBMS out there?

          1 reply 0 retweets 2 likes
        5. Franz Geiger‏ @justfortherec Jan 3
          Replying to @rfc1459 @GeorgeOu and

          Or virtualization

          1 reply 0 retweets 0 likes
        6. Chris Rigby‏ @squeeby Jan 3
          Replying to @justfortherec @rfc1459 and

          And the average developer’s vim setup

          0 replies 0 retweets 24 likes
        7. End of conversation

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