Keeping secrets in memfd areas [LWN.net]

The memfd subsystem wasn’t designed for address-space isolation; indeed, its initial purpose was as a sort of interprocess communication mechanism. It does, however, provide a way to create a memory region attached to a file descriptor with specific characteristics; a memfd can be “sealed”, for example, so that a recipient knows that it will not be changed. Rapoport decided that it would be a good foundation on which to build a “secret memory” feature.

Source: https://lwn.net/SubscriberLink/812325/b642e849751b9068/

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