> On Oct 18, 2018, at 2:24 PM, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > > On 2018-10-18 13:56:24 [-0700], Dave Hansen wrote: >>> But this is not the only loophole: There is ptrace interface which is >>> used by gdb (just checked) and also bypasses PKRU. So… >> >> Bypassing protection keys is not a big deal IMNHO. In places where a >> sane one is not readily available, I'm totally fine with just >> effectively disabling it (PKRU=0) for the length of time it isn't available. > > Okay, this makes things easier. Let document that for kernel threads we > use PKRU=0. This should be happening in my try right now. I double check > tomorrow just in case… > > If you document that, please at least document that it’s a bug and not intended behavior.
