Messages in this thread | | | Subject | Re: [PATCH] x86, powerpc : pkey-mprotect must allow pkey-0 | From | Dave Hansen <> | Date | Fri, 9 Mar 2018 22:50:33 -0800 |
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On 03/09/2018 09:55 PM, Ram Pai wrote: > On Fri, Mar 09, 2018 at 02:40:32PM -0800, Dave Hansen wrote: >> On 03/09/2018 12:12 AM, Ram Pai wrote: >>> Once an address range is associated with an allocated pkey, it cannot be >>> reverted back to key-0. There is no valid reason for the above behavior. On >>> the contrary applications need the ability to do so. >> Why don't we just set pkey 0 to be allocated in the allocation bitmap by >> default? > ok. that will make it allocatable. But it will not be associatable, > given the bug in the current code. And what will be the > default key associated with a pte? zero? or something else?
I'm just saying that I think we should try to keep from making it special as much as possible.
Let's fix the bug that keeps it from being associatable.
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