procfs3.ko used by -1

[tclee060219sat]

The sudo insmod procfs3.ko command hangs the Ubuntu 5.19.0-38-generic laptop. In another terminal, the lsmod|egrep procfs3 execution shows:

$ lsmod|egrep procfs3
procfs3                16384  -1
$ sudo rmmod procfs3

I discovered the solution to this problem is the power-cycle of this laptop. I am seeking a more efficient solution.

[linD026]

It seems like when the lsmod calls to the procfs_open and procfs_close, it doesn't increase but decreases the counter.
Currently, I don't have the v5.19 environment, so I cannot figure out why this happened.

[tclee060219sat]

A module reference count of -1, visible both in /sys/module//refcnt and in lsmod’s output, means that the module is currently unloading.

If a module’s reference count stays at -1, that indicates a problem — dmesg should tell you more.