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Date: Fri, 19 Jun 2020 16:32:57 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Arvind Sankar <nivedita@...m.mit.edu>, Borislav Petkov <bp@...e.de>, Kees Cook <keescook@...omium.org>, Dave Hansen <dave.hansen@...el.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.4 068/101] x86/mm: Stop printing BRK addresses From: Arvind Sankar <nivedita@...m.mit.edu> [ Upstream commit 67d631b7c05eff955ccff4139327f0f92a5117e5 ] This currently leaks kernel physical addresses into userspace. Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu> Signed-off-by: Borislav Petkov <bp@...e.de> Acked-by: Kees Cook <keescook@...omium.org> Acked-by: Dave Hansen <dave.hansen@...el.com> Link: https://lkml.kernel.org/r/20200229231120.1147527-1-nivedita@alum.mit.edu Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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 f00eb52c16a6..17eb564901ca 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -109,8 +109,6 @@ __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++) { -- 2.25.1
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