fix the braino in "namei: massage lookup_slow() to be usable by lookup_one_len_unlocked()" (7500c38a) · Commits · 戴 / test

We should try to trigger automount *before* bailing out on negative dentry. Reported-by:

fs/namei.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -1740,15 +1740,17 @@ static int walk_component(struct nameidata *nd, int flags)
		nd->flags);
		if (IS_ERR(path.dentry))
		return PTR_ERR(path.dentry);
		if (unlikely(d_is_negative(path.dentry))) {
		dput(path.dentry);
		return -ENOENT;
		}

		path.mnt = nd->path.mnt;
		err = follow_managed(&path, nd);
		if (unlikely(err < 0))
		return err;

		if (unlikely(d_is_negative(path.dentry))) {
		path_to_nameidata(&path, nd);
		return -ENOENT;
		}

		seq = 0; /* we are already out of RCU mode */
		inode = d_backing_inode(path.dentry);
		}