On Fri, Mar 09, 2018 at 12:04:49PM +0100, Florian Weimer wrote: > On 03/09/2018 09:12 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. > > mprotect without a key does not necessarily use key 0, e.g. if > protection keys are used to emulate page protection flag combination > which is not directly supported by the hardware. > > Therefore, it seems to me that filtering out non-allocated keys is > the right thing to do. I am not sure, what you mean. Do you agree with the patch or otherwise? RP
