[PATCH 4.18 139/158] f2fs: fix to wait on page writeback before updating page

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chao Yu <yuch...@huawei.com>

[ Upstream commit 6aead1617b3adf2b7e2c56f0f13e4e0ee42ebb4a ]

In error path of f2fs_move_rehashed_dirents, inode page could be writeback
state, so we should wait on inode page writeback before updating it.

Signed-off-by: Chao Yu <yuch...@huawei.com>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/f2fs/inline.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -498,6 +498,7 @@ static int f2fs_move_rehashed_dirents(st
        return 0;
 recover:
        lock_page(ipage);
+       f2fs_wait_on_page_writeback(ipage, NODE, true);
        memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
        f2fs_i_depth_write(dir, 0);
        f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));