Re: WARNING: bad unlock balance detected! - mkfs.ext4/426 is trying to release lock (rcu_read_lock)

[Naresh Kamboju]

On Mon, 7 Dec 2020 at 11:37, Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
>
> On Mon, Dec 07, 2020 at 11:17:29AM +0530, Naresh Kamboju wrote:
> > While running "mkfs -t ext4" on arm64 juno-r2 device connected with SSD drive
> > the following kernel warning reported on stable rc 5.9.13-rc1 kernel.
> >
> > Steps to reproduce:
> > ------------------
> > # boot arm64 Juno-r2 device with stable-rc 5.9.13-rc1.
> > # Connect SSD drive
> > # Format the file system ext4 type
> >  mkfs -t ext4 <SSD-drive>
> > # you will notice this warning
>
> Does it happen easily?  Can you bisect?

I have been running multi test loops to reproduce this problem but no
luck yet :(
Since it is hard to reproduce we can not bisect.

- Naresh