| From 641089c1549d8d3df0b047b5de7e9a111362cdce Mon Sep 17 00:00:00 2001 |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| Date: Mon, 31 Oct 2016 14:42:14 +0100 |
| Subject: ovl: fsync after copy-up |
| |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| |
| commit 641089c1549d8d3df0b047b5de7e9a111362cdce upstream. |
| |
| Make sure the copied up file hits the disk before renaming to the final |
| destination. If this is not done then the copy-up may corrupt the data in |
| the file in case of a crash. |
| |
| Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| fs/overlayfs/copy_up.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/fs/overlayfs/copy_up.c |
| +++ b/fs/overlayfs/copy_up.c |
| @@ -171,6 +171,8 @@ static int ovl_copy_up_data(struct path |
| len -= bytes; |
| } |
| |
| + if (!error) |
| + error = vfs_fsync(new_file, 0); |
| fput(new_file); |
| out_fput: |
| fput(old_file); |
