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SubjectRe: [PATCH] x86/mm/init: Stop printing pgt_buf addresses
On Sat, Feb 29, 2020 at 06:11:20PM -0500, Arvind Sankar wrote:
> This currently leaks kernel physical addresses into userspace.
>
> Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
> ---
> arch/x86/mm/init.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
> index e7bb483557c9..dc4711f09cdc 100644
> --- a/arch/x86/mm/init.c
> +++ b/arch/x86/mm/init.c
> @@ -121,8 +121,6 @@ __ref void *alloc_low_pages(unsigned int num)
> } else {
> pfn = pgt_buf_end;
> pgt_buf_end += num;
> - printk(KERN_DEBUG "BRK [%#010lx, %#010lx] PGTABLE\n",
> - pfn << PAGE_SHIFT, (pgt_buf_end << PAGE_SHIFT) - 1);
> }
>
> for (i = 0; i < num; i++) {
> --
> 2.24.1
>

Ping.

https://lore.kernel.org/lkml/20200229231120.1147527-1-nivedita@alum.mit.edu/

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