diff options
Diffstat (limited to 'fs/overlayfs/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index fa83b3245124..bfdcff0f3168 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1048,6 +1048,14 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) ufs->same_sb = NULL; if (!(ovl_force_readonly(ufs)) && ufs->config.index) { + /* Verify lower root is upper root origin */ + err = ovl_verify_origin(upperpath.dentry, ufs->lower_mnt[0], + stack[0].dentry, true); + if (err) { + pr_err("overlayfs: failed to verify upper root origin\n"); + goto out_put_lower_mnt; + } + ufs->indexdir = ovl_workdir_create(sb, ufs, workpath.dentry, OVL_INDEXDIR_NAME, true); err = PTR_ERR(ufs->indexdir); |