On Sat, Oct 06, 2018 at 07:15:31AM +0300, Amir Goldstein wrote:
> +static int ovl_link_tmpfile(struct ovl_copy_up_ctx *c, struct dentry *temp,
> + struct dentry **newdentry)
> +{
> + int err;
> + struct dentry *upper = NULL;
> + struct inode *udir = d_inode(c->destdir);
> +
> + inode_lock_nested(udir, I_MUTEX_PARENT);
> + upper = lookup_one_len(c->destname.name, c->destdir, c->destname.len);
> + err = PTR_ERR(upper);
> + if (IS_ERR(upper))
> + goto out;
dput(ERR_PTR(something)) will immediately oops on you...
