Re: [PATCH 4.9 46/92] x86/alternative: Print unadorned pointers

[Greg Kroah-Hartman]

On Fri, Feb 09, 2018 at 02:01:32PM -0800, Kees Cook wrote:
> On Fri, Feb 9, 2018 at 5:39 AM, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > 4.9-stable review patch.  If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Borislav Petkov <bp@xxxxxxx>
> >
> > (cherry picked from commit 0e6c16c652cadaffd25a6bb326ec10da5bcec6b4)
> >
> > After commit ad67b74d2469 ("printk: hash addresses printed with %p")
> > pointers are being hashed when printed. However, this makes the alternative
> > debug output completely useless. Switch to %px in order to see the
> > unadorned kernel pointers.
> 
> This missed a "Fixes:" tag so probably missed automated checking on
> how far back to port this. It shouldn't go back beyond 4.15 (where
> ad67b74d2469 first appeared).

Good point.  Should we instead be using %pK for this change instead?  Or
should we just backport commit ad67b74d2469 to 4.14?  :)

Thanks for letting me know this.

greg k-h