From 84bbabc3a452e8085cfbd745ff0bff2b89074417 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Wed, 12 Apr 2017 16:36:34 +0200 Subject: [PATCH] x86/mm: Fix dump pagetables for 4 levels of page tables Commit fdd3d8ce0ea62 ("x86/dump_pagetables: Add support for 5-level paging") introduced an error for dumping with only 4 levels by setting PGD_LEVEL_MULT to a wrong value. This is leading to e.g. addresses printed as "(null)" for ranges: x86/mm: Found insecure W+X mapping at address (null)/(null) Make PGD_LEVEL_MULT a multiple of PTRS_PER_P4D instead of PTRS_PER_PUD Fixes: fdd3d8ce0ea62 ("x86/dump_pagetables: Add support for 5-level paging") Signed-off-by: Juergen Gross Reviewed-by: Kirill A. Shutemov Link: http://lkml.kernel.org/r/20170412143634.6846-1-jgross@suse.com Signed-off-by: Thomas Gleixner --- arch/x86/mm/dump_pagetables.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 9f305be71a72..bce6990b1d81 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -111,7 +111,7 @@ static struct addr_marker address_markers[] = { #define PMD_LEVEL_MULT (PTRS_PER_PTE * PTE_LEVEL_MULT) #define PUD_LEVEL_MULT (PTRS_PER_PMD * PMD_LEVEL_MULT) #define P4D_LEVEL_MULT (PTRS_PER_PUD * PUD_LEVEL_MULT) -#define PGD_LEVEL_MULT (PTRS_PER_PUD * P4D_LEVEL_MULT) +#define PGD_LEVEL_MULT (PTRS_PER_P4D * P4D_LEVEL_MULT) #define pt_dump_seq_printf(m, to_dmesg, fmt, args...) \ ({ \