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x86/mm: Stop printing BRK addresses

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[ Upstream commit 67d631b7c0 ]

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>
This commit is contained in:
Arvind Sankar 2020-02-29 18:11:20 -05:00 committed by Greg Kroah-Hartman
parent 06bd7d87ab
commit 7fe5e9153d
1 changed files with 0 additions and 2 deletions
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2
arch/x86/mm/init.c
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@ -120,8 +120,6 @@ __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++) {