4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chao Yu <yuchao0@xxxxxxxxxx>
[ Upstream commit 82cf4f132e6d16dca6fc3bd955019246141bc645 ]
If config CONFIG_F2FS_FAULT_INJECTION is on, for both read or write path
we will call find_lock_page() to get the page, but for read path, it
missed to passing FGP_ACCESSED to allocator to active the page in LRU
list, result in being reclaimed in advance incorrectly, fix it.
Reported-by: Xianrong Zhou <zhouxianrong@xxxxxxxxxx>
Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/f2fs.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1766,8 +1766,13 @@ static inline struct page *f2fs_grab_cac
pgoff_t index, bool for_write)
{
#ifdef CONFIG_F2FS_FAULT_INJECTION
- struct page *page = find_lock_page(mapping, index);
+ struct page *page;
+ if (!for_write)
+ page = find_get_page_flags(mapping, index,
+ FGP_LOCK | FGP_ACCESSED);
+ else
+ page = find_lock_page(mapping, index);
if (page)
return page;
