ECCploit is the first Rowhammer attack to defeat error-correcting code

Re:ECCploit is the first Rowhammer attack to defeat error-co... by leghifla on Friday November 23, 2018 @12:58AM (#18514657)

It was very simple, I kept all the "logical" addresses the same, but swapped some low address bits with high address bits at the memory controller interface.

With this, the slowly moving indexes became big jumps. This avoids reading the same row over and over again (mixed with other requests).

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Re:ECCploit is the first Rowhammer attack to defeat error-co... by avianes on Friday November 23, 2018 @11:50AM (#18517483)

> This avoids reading the same row over and over again

Didn't you notice a huge drop in performance producing row-buffer conflicts over and over ?

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Re:ECCploit is the first Rowhammer attack to defeat error-co... by leghifla on Friday November 23, 2018 @02:53PM (#18518538)

Good question. Jumping around the memory is clearly not good for throughput. Before the change, the mixing of requests between processes was already detrimental for performance anyway. All I can say is that we needed a fixed bandwidth and it was enough, before or after the change.

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