lkml.org 
[lkml]   [2022]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 13/14] events/uprobes: Break COW PTE before replacing page
Date
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 --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index d9e357b7e17c9..2956a53da01a1 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;

--
2.37.3
\
 
 \ /
  Last update: 2023-03-26 23:15    [W:0.198 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site