From: Arvind Sankar nivedita@alum.mit.edu
[ Upstream commit 67d631b7c05eff955ccff4139327f0f92a5117e5 ]
This currently leaks kernel physical addresses into userspace.
Signed-off-by: Arvind Sankar nivedita@alum.mit.edu Signed-off-by: Borislav Petkov bp@suse.de Acked-by: Kees Cook keescook@chromium.org Acked-by: Dave Hansen dave.hansen@intel.com Link: https://lkml.kernel.org/r/20200229231120.1147527-1-nivedita@alum.mit.edu Signed-off-by: Sasha Levin sashal@kernel.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 1bba16c5742b..a573a3e63f02 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++) {