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Message-ID: <CA+55aFwN=xL=cxgY8pW54b6Zw41ExjxUpvZkAjpZGdh87tsEhw@mail.gmail.com>
Date: Wed, 6 Dec 2017 21:29:24 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: tcharding <me@...in.cc>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>, Randy Dunlap <rdunlap@...radead.org>,
David Laight <David.Laight@...lab.com>, Kees Cook <keescook@...omium.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
"Jason A. Donenfeld" <Jason@...c4.com>, "Theodore Ts'o" <tytso@....edu>, 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>, 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>,
Radim Krcmár <rkrcmar@...hat.com>,
Linux Kernel Mailing List <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 4/5] vsprintf: add printk specifier %px
On Dec 6, 2017 21:17, "Tobin C. Harding" <me@...in.cc> wrote:
> hm, indeed. and !CONFIG_KALLSYMS config turns %pS/%ps
> into special_hex_number().
But totally misses this :(
"<no-sym>" would be better returned when !CONFIG_KALLSYMS, right?
No, we still want those configurations to be debuggable.
If !CONFIG_KALLSYMS, we'll just continue print the hex number. It's not a
normal configuration, leaking an address there is fine, and preferable to
"cannot debug"
Linus
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