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Memory Integrity Enforcement

(security.apple.com)
461 points circuit | 1 comments | 09 Sep 25 18:25 UTC | HN request time: 0.209s | source
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rdtsc ◴[09 Sep 25 20:22 UTC] No.45188340[source]▶
1988 called and wants it memory tagging back https://www.devever.net/~hl/ppcas !

But yeah this was support for a the longest time by IBM basically. It's nice to see it's getting more widespread.

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1. pyth0 ◴[09 Sep 25 20:40 UTC] No.45188645[source]▶
The big difference with this seems like it is an actual security mechanism to block "invalid" accesses where as the tagged memory extensions only provided pointer metadata and it was up to the OS to enforce invariants.

> Extensions provide no security. [...] The tagged memory extensions don't stop you from doing anything.