Re: [PATCH] powerpc/32: Stop printing Kernel virtual memory layout

[Kees Cook]

On Wed, Jan 08, 2025 at 07:40:38PM +0100, Christophe Leroy wrote:
> Printing of Kernel virtual memory layout was added for debug purpose
> by commit f637a49e507c ("powerpc: Minor cleanups of kernel virt
> address space definitions")
> 
> For security reasons, don't display the kernel's virtual memory layout.
> 
> Other architectures have removed it through following commits.
> 
> 071929dbdd86 ("arm64: Stop printing the virtual memory layout")
> 1c31d4e96b8c ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
> 31833332f798 ("m68k/mm: Stop printing the virtual memory layout")
> fd8d0ca25631 ("parisc: Hide virtual kernel memory layout")
> 681ff0181bbf ("x86/mm/init/32: Stop printing the virtual memory layout")
> 
> Commit 681ff0181bbf ("x86/mm/init/32: Stop printing the virtual memory
> layout") thought x86 was the last one, but in reality powerpc/32 still
> had it.
> 
> So remove it now on powerpc/32 as well.
> 
> Cc: Arvind Sankar <nivedita@xxxxxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>

Reviewed-by: Kees Cook <kees@xxxxxxxxxx>

-- 
Kees Cook