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Mark_Seaborn's profile
Mark Seaborn
Mark Seaborn
Mark Seaborn
@Mark_Seaborn

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Mark Seaborn

@Mark_Seaborn

San Francisco Bay Area
lackingrhoticity.blogspot.com
Joined March 2009

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    1. Dan Kaminsky‏Verified account @dakami 16 Mar 2015

      A definitive answer to what modern operating systems do given an uncorrectable ECC error is surprisingly elusive. #RowHammer

      4 replies 4 retweets 9 likes
    2. Brian Mastenbrook‏ @bmastenbrook 16 Mar 2015
      Replying to @dakami

      @dakami on x86 CPUs it generates a machine check exception, and generally modern OSes will panic (or BSOD in the case of Windows).

      1 reply 0 retweets 0 likes
    3. Dan Kaminsky‏Verified account @dakami 16 Mar 2015
      Replying to @bmastenbrook

      @bmastenbrook and yet I see writeups of "logging uncorrectable errors"

      1 reply 0 retweets 0 likes
    4. Brian Mastenbrook‏ @bmastenbrook 16 Mar 2015
      Replying to @dakami

      @dakami example, and on what OS? Most OSes will log as they go down. On Linux you can disable the panic entirely.

      1 reply 0 retweets 0 likes
    5. Dan Kaminsky‏Verified account @dakami 16 Mar 2015
      Replying to @bmastenbrook

      @bmastenbrook what's default on common distros? How to check?

      1 reply 0 retweets 0 likes
    6. Mark Seaborn‏ @Mark_Seaborn 17 Mar 2015
      Replying to @dakami

      @dakami You can check MCE config with "cat /sys/devices/system/machinecheck/machinecheck*/tolerant". It should print "1"s, the safe default

      1 reply 0 retweets 0 likes
    7. Dan Kaminsky‏Verified account @dakami 17 Mar 2015
      Replying to @Mark_Seaborn

      @Mark_Seaborn eh, SIGBUS sounds pretty survivable on anything that automatically respawns

      1 reply 0 retweets 0 likes
      Mark Seaborn‏ @Mark_Seaborn 19 Mar 2015
      Replying to @dakami

      @dakami Indeed, getting SIGBUS on an uncorrectable ECC error seems risky. Here are some notes on that:https://groups.google.com/d/msg/rowhammer-discuss/9Vgso6u2GP0/gqcN86TirVoJ …

      11:52 AM - 19 Mar 2015
      • 3 Retweets
      • 1 Like
      • kwlzn Barry K. Nathan Dan Kaminsky
      0 replies 3 retweets 1 like

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