Date: Wed, 11 Oct 2017 10:31:16 +1100 From: "Tobin C. Harding" <me@...in.cc> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, KVM list <kvm@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Kees Cook <keescook@...omium.org>, Paolo Bonzini <pbonzini@...hat.com>, Tycho Andersen <tycho@...ker.com>, "Roberts, William C" <william.c.roberts@...el.com>, Tejun Heo <tj@...nel.org>, Jordan Glover <Golden_Miller83@...tonmail.ch>, Greg KH <gregkh@...uxfoundation.org>, Petr Mladek <pmladek@...e.com>, Joe Perches <joe@...ches.com>, Ian Campbell <ijc@...lion.org.uk>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Steven Rostedt <rostedt@...dmis.org>, Chris Fries <cfries@...gle.com>, Dave Weinstein <olorin@...gle.com>, Daniel Micay <danielmicay@...il.com>, Djalal Harouni <tixxdz@...il.com> Subject: Re: [PATCH 0/3] add %pX specifier On Tue, Oct 10, 2017 at 04:16:55PM -0700, Linus Torvalds wrote: > On Tue, Oct 10, 2017 at 4:09 PM, Tobin C. Harding <me@...in.cc> wrote: > > > > This patch is a softer version of Linus' suggestion because it does not change the behaviour of the > > %p specifier. I don't see the benefit in making such a breaking change without addressing the issue > > of %x (and I don't the balls to right now). > > The thing is, this continues to have the exact same issue that %pK has > - because it is opt-in, effectively nobody will actually use it. > > That's why I would suggest that if we do this way, we really change %p > and %pa to use the hashed value, to convert *everybody*. And then > people who have a good reason to actually expose the pointer have to > do the extra work and opt out. > > Linus Righto, I'll wait 24 hours and submit v2 with the change as suggested. I guess now is as good a time as any annoy everybody and cause them to do work (for the greater good :) Then I can direct effort at finding any users of %x for kernel addresses. thanks, Tobin.
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