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Diffstat (limited to 'arch/x86/mm/dump_pagetables.c')
-rw-r--r--arch/x86/mm/dump_pagetables.c24
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)