Re: [PATCH v4 1/5] fuse: Fix leak in fuse_dentry_automount() error path

[Al Viro]

On Thu, May 20, 2021 at 05:46:50PM +0200, Greg Kurz wrote:
> Some rollback was forgotten during the addition of crossmounts.

Have you actually tested that?  Because I strongly suspect that
by that point the ownership of fc and fm is with sb and those
should be taken care of by deactivate_locked_super().