Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users
From: Mike Rapoport <rppt@kernel.org>
Date: 2021-02-22 10:25:35
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linux-api, linux-arch, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, nvdimm
On Mon, Feb 22, 2021 at 07:34:52AM +0000, Matthew Garrett wrote:
On Mon, Feb 08, 2021 at 10:49:18AM +0200, Mike Rapoport wrote:quoted
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.Sorry for being a bit late to this - from the point of view of running processes (and even the kernel once resume is complete), hibernation is effectively equivalent to suspend to RAM. Why do they need to be handled differently here?
Hibernation leaves a copy of the data on the disk which we want to prevent. -- Sincerely yours, Mike. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel