Re: [PATCH v19 6/8] PM: hibernate: disable when there are active secretmem users
From: David Hildenbrand <hidden>
Date: 2021-05-18 10:27:21
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linux-api, linux-arch, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml
On 18.05.21 12:24, Mark Rutland wrote:
On Thu, May 13, 2021 at 09:47:32PM +0300, Mike Rapoport wrote:quoted
From: Mike Rapoport <redacted> It is unsafe to allow saving of secretmem areas to the hibernation snapshot as they would be visible after the resume and this essentially will defeat the purpose of secret memory mappings. Prevent hibernation whenever there are active secret memory users.Have we thought about how this is going to work in practice, e.g. on mobile systems? It seems to me that there are a variety of common applications which might want to use this which people don't expect to inhibit hibernate (e.g. authentication agents, web browsers). Are we happy to say that any userspace application can incidentally inhibit hibernate?
It's worth noting that secretmem has to be explicitly enabled by the admin to even work. -- Thanks, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel