Re: Oops (probably) unmounting /oldroot/firmware/efi/efivars.

[Ard Biesheuvel]

On Tue, 24 Nov 2020 at 15:58, David Laight <David.Laight@xxxxxxxxxx> wrote:
>
> From: Ard Biesheuvel
> > Sent: 24 November 2020 14:24
> >
> > On Tue, 24 Nov 2020 at 15:22, David Laight <David.Laight@xxxxxxxxxx> wrote:
> > >
> > > I've just updated to the head of Linus's tree (5.10-rc5) and got the following
> > > 'splat' during shutdown.
> > >
> > > Userspace is Ubuntu 20.04.
> > >
> > > rc4 rebooted fine.
> > >
> > > I'll try to bisect - but it isn't quick.
> > >
> >
> > Surely caused by
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/efivarfs?id=fe5186cf12e30
> > facfe261e9be6c7904a170bd822
>
> Yep, reboots fine with that kfree() commented out.
>

Thanks for confirming.

Does it also work when keeping the kfree() and setting
inode->i_private to NULL explicitly afterwards?