https://lwn.net/Articles/1004029/ This is a special feed containing comments posted to the individual LWN article titled "Page-table hardening with memory protection keys". en-us Wed, 08 Oct 2025 00:34:35 +0000 Wed, 08 Oct 2025 00:34:35 +0000 https://www.rssboard.org/rss-specification lwn@lwn.net https://lwn.net/Articles/1005236/ https://lwn.net/Articles/1005236/ rgb <div class="FormattedComment"> Is this enabled by default in most common distribution kernels nowadays?<br> </div> Thu, 16 Jan 2025 05:03:23 +0000 https://lwn.net/Articles/1004598/ https://lwn.net/Articles/1004598/ willy <div class="FormattedComment"> In 2018, I added PG_table (since renamed PGTY_table) to mark pages allocated for page tables. In March 2019, I added code to prevent page tables being mapped into userspace. That doesn't address the same attacks being defended against here, but it was a cheap check to add that doesn't require new CPU features.<br> </div> Thu, 09 Jan 2025 16:09:16 +0000