298803 2025-09-12 16:38:43 -0700 [libpas] Implement primary support for MTE 2025-09-24 14:27:53 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified REOPENED InRadar P2 Normal --- 299465 1 marcus_plutowski webkit-unassigned commit-queue webkit-bug-importer oldest_to_newest 2142714 0 marcus_plutowski 2025-09-12 16:38:43 -0700 rdar://160499929 As announced on September 9th, the SoCs used in the next generation of iPhones will include support for ARM'S Memory Tagging Extension functionality. As part of Apple's MIE (Memory Integrity Enforcement) feature, libpas should implement support for MTE and related memory-safety functionality to ensure that WebKit is up to par with the new memory safety standards set by the rest of the system. To do so, libpas should, when possible, allocate pages with backing MTE memory and, prior to returning allocations to the caller, tag them so that only valid pointers can access them (up to the standard probabilistic bound), as well as doing the necessary work to clean up tags and pre-empt certain attacker strategies with standard hardening measures. 2142715 1 marcus_plutowski 2025-09-12 16:51:21 -0700 Pull request: https://github.com/WebKit/WebKit/pull/50687 2145579 2 ews-feeder 2025-09-24 09:36:04 -0700 Committed 300469@main (d3acbe4f9624): <https://commits.webkit.org/300469@main> Reviewed commits have been landed. Closing PR #50687 and removing active labels. 2145639 3 commit-queue 2025-09-24 12:30:05 -0700 Re-opened since this is blocked by bug 299465 2145716 4 marcus_plutowski 2025-09-24 14:27:09 -0700 <rdar://problem/161273712> 2145717 5 marcus_plutowski 2025-09-24 14:27:53 -0700 Pull request: https://github.com/WebKit/WebKit/pull/51283