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

On Mon, 7 Dec 2020 at 11:37, Matthew Wilcox willy@infradead.org 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