RE: [PATCH] ACPI / sysfs: Extend ACPI sysfs to provide access to boot error region

[Luck, Tony]

>> Should this not also have a capability check. Assuming file permissions
>> are sufficient for grabbing a chunk of system memory holding error
>> info doesn't seem too scary but it's at odds with a lot of other cases ?
>
> At least one of those other cases (pstore) added a capability check and now regret
> it.  There's a thread on reverting it. Look for:
>
>   Revert "pstore: Honor dmesg_restrict sysctl on dmesg dumps"

Here's at least part of that thread:

https://marc.info/?l=linux-kernel&m=150301241114262&w=2

Kees: you were OK with removing the capability check from pstore, right?

I'm now adding another place to access a blob of memory containing
crash information from the previous kernel (pointed at by the ACPI
BERT record).

-Tony