linux-kernel - Re: [GIT PULL] hash addresses printed with %p

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Message-ID: <CAGXu5j+DhUuucgjezvKNqDGRKq8Wp3L+XnO4DCb6BvJ5rOx7dw@mail.gmail.com>
Date:   Fri, 1 Dec 2017 08:33:32 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Tobin C. Harding" <me@...in.cc>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>
Subject: Re: [GIT PULL] hash addresses printed with %p

On Fri, Dec 1, 2017 at 7:34 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:

> And isn't there a specific %p modifier you should use for a kernel
> pointer.  I've lost the thread here for what should, or should not, be
> done for kernel pointers these days based on the long email discussion.

Current implementation to bypass the hashing is %px. (Though perhaps
all %px usage should include a comment with a justification?)

-Kees

-- 
Kees Cook
Pixel Security