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A comment on Firefox vs. rthreads. Parent comment

Re:Firefox vs. rthreads by exDM69 on Monday April 11, 2016 @09:55AM (#11471459)
I guess there are no known security issues but they are speculating that the vDSO mechanisms may have not-yet-discovered bugs in them.

The idea is just having a special page that is mapped as read-only in userspace and kernel writable. If it's correctly implemented, it should be safe.

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Re:Firefox vs. rthreads by gpvos on Monday April 11, 2016 @12:00PM (#11472442)
I guess they just see every extra interface between kernel and userland as another attack surface and therefore to be avoided.
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