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Diffstat (limited to 'arch/x86/mm/pti.c')
-rw-r--r--arch/x86/mm/pti.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/mm/pti.c b/arch/x86/mm/pti.c
index fcfb815d420f..a536ecc91847 100644
--- a/arch/x86/mm/pti.c
+++ b/arch/x86/mm/pti.c
@@ -404,7 +404,7 @@ static void __init pti_setup_espfix64(void)
/*
* Clone the populated PMDs of the entry and irqentry text and force it RO.
*/
-static void __init pti_clone_entry_text(void)
+static void pti_clone_entry_text(void)
{
pti_clone_pmds((unsigned long) __entry_text_start,
(unsigned long) __irqentry_text_end,
@@ -528,13 +528,18 @@ void __init pti_init(void)
}
/*
- * Finalize the kernel mappings in the userspace page-table.
+ * Finalize the kernel mappings in the userspace page-table. Some of the
+ * mappings for the kernel image might have changed since pti_init()
+ * cloned them. This is because parts of the kernel image have been
+ * mapped RO and/or NX. These changes need to be cloned again to the
+ * userspace page-table.
*/
void pti_finalize(void)
{
/*
- * Do this after all of the manipulation of the
- * kernel text page tables are complete.
+ * We need to clone everything (again) that maps parts of the
+ * kernel image.
*/
+ pti_clone_entry_text();
pti_clone_kernel_text();
}