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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. Thomas H. Ptacek‏ @tqbf 29 Jun 2016
      Replying to @tqbf @RichFelker @phryanjr

      (incidentally: my faith in “containerization” as protection for losing code execution: not at all high)

      2 replies 0 retweets 2 likes
    2. Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @tqbf @phryanjr

      I don't see most use as a "protection"; rather it just makes throwing away & replacing a compromised environment easy.

      1 reply 0 retweets 0 likes
    3. Thomas H. Ptacek‏ @tqbf 29 Jun 2016
      Replying to @RichFelker @phryanjr

      Yes, but to do that, you have to trust that the host isn’t compromised, and you probably shouldn’t.

      2 replies 0 retweets 0 likes
    4. Thomas H. Ptacek‏ @tqbf 29 Jun 2016
      Replying to @tqbf @RichFelker @phryanjr

      Maybe in 5 years or so, we’ll be at a point where a typical best-practices non-hardened container survives RCE.

      1 reply 0 retweets 0 likes
    5. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @tqbf @RichFelker @phryanjr

      Linux kernel security is trending in the wrong direction. More complexity, more attack surface, more code churn.

      1 reply 1 retweet 3 likes
    6. Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @CopperheadOS @tqbf @phryanjr

      One outcome of my taking on kernel work might be gaining enough experience to redo it right. :-)

      1 reply 0 retweets 0 likes
    7. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @RichFelker @tqbf @phryanjr

      It really needs a many-pronged approach, and the Linux kernel is failing at every aspect of improving security.

      1 reply 1 retweet 0 likes
    8. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @CopperheadOS @RichFelker and

      Moving more code into the kernel, instead of moving towards a microkernel like competing operating systems.

      1 reply 0 retweets 1 like
    9. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @CopperheadOS @RichFelker and

      And sticking with using entirely C, instead of migrating towards a safe language for new / rewritten components.

      3 replies 0 retweets 0 likes
    10. Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @CopperheadOS @tqbf @phryanjr

      I don't see any viable alternatives to C for robust kernel programming, but Linux doesn't even use C robustly.

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @RichFelker @CopperheadOS and

      Idiotic things like malloc'ing & refcnting struct cred rather than putting it in task struct directly.

      10:51 AM - 29 Jun 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. CopperheadOS‏ @CopperheadOS 29 Jun 2016
          Replying to @RichFelker @tqbf @phryanjr

          There are viable alternatives to C, like Rust without any of the standard libraries above the layer of libcore.

          2 replies 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @CopperheadOS @tqbf @phryanjr

          Maybe someday, but for now I don't see how a language whose spec isn't even near-stable is usable for kernel..

          2 replies 0 retweets 0 likes
        4. CopperheadOS‏ @CopperheadOS 29 Jun 2016
          Replying to @RichFelker @tqbf @phryanjr

          It's not like the C specification is stable... and it only gained a memory model with C11, which is a big deal.

          2 replies 0 retweets 0 likes
        5. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @CopperheadOS @tqbf @phryanjr

          Previously POSIX specified a much stronger (more constr) mem model to which all usable compilers had to comply

          1 reply 0 retweets 0 likes
        6. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @RichFelker @CopperheadOS and

          And the pre-C11 [lack of] memory model in C was sufficient for specifying non-concurrent behavior fully.

          1 reply 0 retweets 0 likes
        7. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @RichFelker @CopperheadOS and

          So IMO from a practical standpoint C11 significantly weakened the memory model, rather than adding it.

          1 reply 0 retweets 0 likes
        8. CopperheadOS‏ @CopperheadOS 29 Jun 2016
          Replying to @RichFelker @tqbf @phryanjr

          From a practical standpoint, they've had major issues with their own informal model not matching how GCC works.

          2 replies 0 retweets 0 likes
        9. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @CopperheadOS @tqbf @phryanjr

          They = Linux kernel devs? I don't doubt it one bit. Their informal model is "C is high level assembler". :-(

          1 reply 0 retweets 0 likes
        10. 5 more replies

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