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A comment on Blacksmith – Rowhammer bit flips on all DRAM devices today despite mitigations. Parent comment

Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by snak on Monday November 15, 2021 @03:38PM (#29232392)
Yes, the article mentions it:

> What if I have ECC-capable DIMMs?

> Previous work showed that due to the large number of bit flips in current DDR4 devices, ECC cannot provide complete protection against Rowhammer but makes exploitation harder.

[ Parent | on HN ]
Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by hinkley on Monday November 15, 2021 @04:01PM (#29232690)
It sounds to me like ECC isn't being included in the DDR5 spec due to magnanimity so much as because it doesn't function without it. That ECC has become 'load-bearing'.

Does that mean we need an extended ECC to deal with critical systems that require additional robustness?

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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by Legion on Monday November 15, 2021 @04:17PM (#29232901)
Who error checks the error checkers?
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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by RedShift1 on Monday November 15, 2021 @04:27PM (#29232991)
It's just a matter of time before someone finds a way to exploit the ECC part, calls it Hammerrow and brings us back to square one...
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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by aaaaaaaaaaab on Monday November 15, 2021 @05:27PM (#29233718)
Rowhamming would be a better pun, as DDR5 uses a Hamming code for error correction.
[ Parent | on HN ]