Messages in this thread | | | From | Miklos Szeredi <> | Date | Fri, 21 May 2021 09:54:19 +0200 | Subject | Re: [PATCH v4 1/5] fuse: Fix leak in fuse_dentry_automount() error path |
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On Thu, 20 May 2021 at 21:45, Al Viro <viro@zeniv.linux.org.uk> wrote: > > 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().
Not quite. Patch looks correct because destruction of fm is done in fuse_put_super(), which only gets called if the sb initialization gets as far as setting up sb->s_root, which only happens after the successful fuse_fill_super_submount() call in this case.
Doing the destruction from the various ->kill_sb() instances instead of from ->put_super() would also fix this, but I'm not quite sure that that would be any cleaner.
Thanks, Miklos
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