Comment 3 for bug 1821259

Test-case (kmod-stopper.c)
---------

$ sudo apt-get -y install gcc make libelf-dev linux-headers-$(uname -r)

$ touch Makefile # fake it, and use this make line:
$ make -C /lib/modules/$(uname -r)/build M=$(pwd) obj-m=kmod-stopper.o modules

$ echo 9 | sudo tee /proc/sys/kernel/printk

$ sudo insmod kmod-stopper.ko
<watch console for messages>
<it either hangs / finishes>

$ sudo rmmod kmod-stopper