diff options
Diffstat (limited to 'arch/x86/mm/dump_pagetables.c')
| -rw-r--r-- | arch/x86/mm/dump_pagetables.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index b7b88c1d91ec..89079ea73e65 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -362,9 +362,9 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, } } -static void ptdump_walk_pgd_level_core(struct seq_file *m, - struct mm_struct *mm, pgd_t *pgd, - bool checkwx, bool dmesg) +bool ptdump_walk_pgd_level_core(struct seq_file *m, + struct mm_struct *mm, pgd_t *pgd, + bool checkwx, bool dmesg) { const struct ptdump_range ptdump_ranges[] = { #ifdef CONFIG_X86_64 @@ -391,12 +391,17 @@ static void ptdump_walk_pgd_level_core(struct seq_file *m, ptdump_walk_pgd(&st.ptdump, mm, pgd); if (!checkwx) - return; - if (st.wx_pages) + return true; + if (st.wx_pages) { pr_info("x86/mm: Checked W+X mappings: FAILED, %lu W+X pages found.\n", st.wx_pages); - else + + return false; + } else { pr_info("x86/mm: Checked W+X mappings: passed, no W+X pages found.\n"); + + return true; + } } void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm) @@ -431,9 +436,12 @@ void ptdump_walk_user_pgd_level_checkwx(void) #endif } -void ptdump_walk_pgd_level_checkwx(void) +bool ptdump_walk_pgd_level_checkwx(void) { - ptdump_walk_pgd_level_core(NULL, &init_mm, INIT_PGD, true, false); + if (!(__supported_pte_mask & _PAGE_NX)) + return true; + + return ptdump_walk_pgd_level_core(NULL, &init_mm, INIT_PGD, true, false); } static int __init pt_dump_init(void) |