| From b81de061fa59f17d2730aabb1b84419ef3913810 Mon Sep 17 00:00:00 2001 |
| From: Konstantin Khlebnikov <koct9i@gmail.com> |
| Date: Sun, 31 Jan 2016 16:21:29 +0300 |
| Subject: ovl: copy new uid/gid into overlayfs runtime inode |
| |
| From: Konstantin Khlebnikov <koct9i@gmail.com> |
| |
| commit b81de061fa59f17d2730aabb1b84419ef3913810 upstream. |
| |
| Overlayfs must update uid/gid after chown, otherwise functions |
| like inode_owner_or_capable() will check user against stale uid. |
| Catched by xfstests generic/087, it chowns file and calls utimes. |
| |
| Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> |
| Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| fs/overlayfs/inode.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/fs/overlayfs/inode.c |
| +++ b/fs/overlayfs/inode.c |
| @@ -65,6 +65,8 @@ int ovl_setattr(struct dentry *dentry, s |
| |
| mutex_lock(&upperdentry->d_inode->i_mutex); |
| err = notify_change(upperdentry, attr, NULL); |
| + if (!err) |
| + ovl_copyattr(upperdentry->d_inode, dentry->d_inode); |
| mutex_unlock(&upperdentry->d_inode->i_mutex); |
| } |
| ovl_drop_write(dentry); |
