Re: [PATCH v2] printk: hash addresses printed with %p

[Steven Rostedt]

On Wed, 18 Oct 2017 10:15:59 +1100
"Tobin C. Harding" <me@xxxxxxxx> wrote:

> > Does %p[FfSs] leak addresses? Well, I guess it does if they are not
> > found in kallsyms, but otherwise you have:
> > 
> >   function+0x<offset>  
> 
> You are correct %pF and %pS print an offset. Does this provide an attack vector,
> I didn't think so but I'm no security expert. If they do then we need to amend
> those calls also.

Hopefully not. We changed stack dumps to use them only instead of
showing addresses because of the location leak.

-- Steve