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Date:   Wed, 20 Feb 2019 11:42:17 -0500
From:   Steven Rostedt <>
To:     Masami Hiramatsu <>
Cc:     Linus Torvalds <>,
        Andy Lutomirski <>,
        Linux List Kernel Mailing <>,
        Ingo Molnar <>,
        Andrew Morton <>,
        stable <>,
        Changbin Du <>,
        Jann Horn <>,
        Kees Cook <>,
        Andy Lutomirski <>
Subject: Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access
 kernel memory that can fault

On Thu, 21 Feb 2019 01:04:53 +0900
Masami Hiramatsu <> wrote:

> > What about just adding 'u' to the end of the offset? Say you have a
> > data structure in kernel space that has a field in user space you want
> > to reference?
> > 
> > 
> > 	field_val=+8u(+0(%si))  
> Ah, that looks good :~) thank you for this idea!


Hmm, I wonder if we should make it +u8 or u+8? as +8u may be confused
as unsigned? Like 8ULL. I don't know. Kernel developers suck at
naming :-p


-- Steve

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