Messages in this thread | | | Date | Thu, 6 Oct 2022 16:16:16 -0700 | From | Kees Cook <> | Subject | Re: [PATCH 8/8] efi: pstore: Add module parameter for setting the record size |
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On Thu, Oct 06, 2022 at 07:42:12PM -0300, Guilherme G. Piccoli wrote: > By default, the efi-pstore backend hardcode the UEFI variable size > as 1024 bytes. That's not a big deal, but at the same time having > no way to change that in the kernel is a bit bummer for specialized > users - there is not such a limit in the UEFI specification.
It seems to have been added in commit e0d59733f6b1 ("efivars, efi-pstore: Hold off deletion of sysfs entry until the scan is completed")
But I see no mention of why it was introduced or how it was chosen.
I remember hearing some horror stories from Matthew Garrett about older EFI implementations bricking themselves when they stored large variables, or something like that, but I don't know if that's meaningful here at all.
I think it'd be great to make it configurable! Ard, do you have any sense of what the max/min, etc, should be here?
-- Kees Cook
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