Re: [PATCH v2 6/6] powerpc/pkeys: Deny read/write/execute by default

[Florian Weimer]

On 06/19/2018 02:39 PM, Michael Ellerman wrote:
Ram Pai <linux...@us.ibm.com> writes:
Deny all permissions on all keys, with some exceptions.  pkey-0 must
allow all permissions, or else everything comes to a screaching halt.
Execute-only key must allow execute permission.

Another ABI change.

Are we calling this a bug fix?

Yes.  Note that the default is configurable on x86 (default is deny), so 
it's not really an ABI change as such IMHO.

Thanks,
Florian