diff mbox series

[v4,13/14] events/uprobes: Break COW PTE before replacing page

Message ID 20230207035139.272707-14-shiyn.lin@gmail.com (mailing list archive)
State New, archived
Headers show
Series Introduce Copy-On-Write to Page Table | expand

Commit Message

Chih-En Lin Feb. 7, 2023, 3:51 a.m. UTC 
Break COW PTE if we want to replace the page which
resides in COW-ed PTE.

Signed-off-by: Chih-En Lin <shiyn.lin@gmail.com>
---
 kernel/events/uprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index d9e357b7e17c..2956a53da01a 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -157,7 +157,7 @@  static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 	struct folio *old_folio = page_folio(old_page);
 	struct folio *new_folio;
 	struct mm_struct *mm = vma->vm_mm;
-	DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, 0);
+	DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, PVMW_BREAK_COW_PTE);
 	int err;
 	struct mmu_notifier_range range;