RESOLVED FIXED300151
[libpas] Enable MTE Retag on Scavenge for privileged processes 
https://bugs.webkit.org/show_bug.cgi?id=300151
Summary [libpas] Enable MTE Retag on Scavenge for privileged processes
Marcus Plutowski
Reported 2025-10-03 15:53:06 PDT
rdar://156723433 This is an MTE hardening feature which helps catch use-after-frees by retagging objects as we scavenge them. It has a significant performance cost, but as long as we only enable it for privileged processes that cost disappears.
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Marcus Plutowski
Comment 1 2025-10-03 15:55:52 PDT
Pull request: https://github.com/WebKit/WebKit/pull/51785
EWS
Comment 2 2025-10-03 21:42:10 PDT
Committed 300987@main (34584723de5b): <https://commits.webkit.org/300987@main> Reviewed commits have been landed. Closing PR #51785 and removing active labels.
WebKit Commit Bot
Comment 3 2025-10-05 08:53:14 PDT
Re-opened since this is blocked by bug 300197
Marcus Plutowski
Comment 4 2025-11-19 11:39:42 PST
<rdar://problem/15672433>
Marcus Plutowski
Comment 5 2025-11-19 11:41:40 PST
Pull request: https://github.com/WebKit/WebKit/pull/54197
EWS
Comment 6 2025-11-21 11:31:24 PST
Committed 303411@main (742c2f8c7a2a): <https://commits.webkit.org/303411@main> Reviewed commits have been landed. Closing PR #54197 and removing active labels.
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