We don't want to read PTEs directly like this after they have been
modified, as a lazy MMU implementation of direct page tables may not
have written the updated PTE back to memory yet.
Signed-off-by: Zachary Amsden <[email protected]>
Signed-off-by: Jeremy Fitzhardinge <[email protected]>
Cc: [email protected]
---
mm/memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
===================================================================
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -466,7 +466,7 @@ copy_one_pte(struct mm_struct *dst_mm, s
*/
if (is_cow_mapping(vm_flags)) {
ptep_set_wrprotect(src_mm, addr, src_pte);
- pte = *src_pte;
+ pte = pte_wrprotect(pte);
}
/*