Date: Wed, 29 Nov 2017 15:27:46 +1100 From: "Tobin C. Harding" <me@...in.cc> To: Steven Rostedt <rostedt@...dmis.org> Cc: kernel-hardening@...ts.openwall.com, Linus Torvalds <torvalds@...ux-foundation.org>, "Jason A. Donenfeld" <Jason@...c4.com>, Theodore Ts'o <tytso@....edu>, Kees Cook <keescook@...omium.org>, Paolo Bonzini <pbonzini@...hat.com>, Tycho Andersen <tycho@...ho.ws>, "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 <wilal.deacon@....com>, Chris Fries <cfries@...gle.com>, Dave Weinstein <olorin@...gle.com>, Daniel Micay <danielmicay@...il.com>, Djalal Harouni <tixxdz@...il.com>, Radim Krčmář <rkrcmar@...hat.com>, linux-kernel@...r.kernel.org, Network Development <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>, Stephen Rothwell <sfr@...b.auug.org.au>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Alexander Potapenko <glider@...gle.com>, Dmitry Vyukov <dvyukov@...gle.com>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH V11 2/5] vsprintf: refactor %pK code out of pointer() On Tue, Nov 28, 2017 at 09:39:57PM -0500, Steven Rostedt wrote: > On Wed, 29 Nov 2017 13:05:02 +1100 > "Tobin C. Harding" <me@...in.cc> wrote: > > > + /* > > + * kptr_restrict==1 cannot be used in IRQ context > > + * because its test for CAP_SYSLOG would be meaningless. > > + */ > > + if (in_irq() || in_serving_softirq() || in_nmi()) > > This could be replaced with: > > if (!in_task()) > > Which is actually more efficient. thanks for the comment Steve. At this late stage in the game do you mind if I don't include this change in this set. The code line in question is only in the series because of refactoring. I'm comfortable arguing that improving efficiency is out of scope ;) thanks, Tobin.
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