modprobe: ERROR: could not insert 'tty0tty': Device or resource busy

[waageesh]

I am also getting same issues, below is the traceback, could you please check and tell where is the issue ?

===================================================================
waageesh@waageesh-Aspire-A715-75G:~/Downloads/Softwares/tty0tty$ hostnamectl
Static hostname: waageesh-Aspire-A715-75G
Icon name: computer-laptop
Chassis: laptop
Machine ID: 7a93dcb479364111a24c53faca24ad60
Boot ID: f50dc5d4059f49ca9bcabbf3e677ea32
Operating System: Ubuntu 20.04.2 LTS
Kernel: Linux 5.8.0-48-generic
Architecture: x86-64

===================================================================

[stappersg]

Please report what happens upon

sudo insmod /path/to/tty0tty.ko

[waageesh]

[stappersg]

On Fri, Apr 02, 2021 at 11:23:44PM -0700, waageesh wrote: 

And why should I leave my text based mail client to visit a picture with text? In other words: Please send the report on ``` sudo insmod /path/to/tty0tty.ko ``` In case the quick response of original poster was saying something like "No, still no success. I'm now active waiting, hurry up". This advice http:https://www.catb.org/~esr/faqs/smart-questions.html#intro

[waageesh]

This is what i got on sudo insmod /path/to/tty0tty.ko

waageesh@waageesh-Aspire-A715-75G:~/Downloads/Softwares/tty0tty/module$ sudo insmode tty0tty.ko 
sudo: insmode: command not found

[stappersg]

On Sat, Apr 03, 2021 at 12:20:44AM -0700, waageesh wrote: This is what i got on ```sudo insmod /path/to/tty0tty.ko``` ``` ***@***.***Aspire-A715-75G:~/Downloads/Softwares/tty0tty/module$ sudo insmode tty0tty.ko sudo: insmode: command not found ```

So write `insmod` as `insmod`, not as `insmode`. Drop the `e`.

[waageesh]

new error as "operation not permitted error"

waageesh@waageesh-Aspire-A715-75G:~/Downloads/Softwares/tty0tty/module$ sudo insmod tty0tty.ko
insmod: ERROR: could not insert module tty0tty.ko: Operation not permitted

[stappersg]

On Sat, Apr 03, 2021 at 01:17:11AM -0700, waageesh wrote: new error as "operation not permitted error" ``` ***@***.***Aspire-A715-75G:~/Downloads/Softwares/tty0tty/module$ sudo insmod tty0tty.ko insmod: ERROR: could not insert module tty0tty.ko: Operation not permitted ```

https://duckduckgo.com/?q=insmod%3A+ERROR%3A+could+not+insert+module+tty0tty.ko%3A+Operation+not+permitted

[stappersg]

For what it is worth: it works for me

• compiles cleanly
• allowed to insmod

With sudo dmesg | tail -n 3 do I get

[ 1200.089467] tty0tty: loading out-of-tree module taints kernel.
[ 1200.089561] tty0tty: module verification failed: signature and/or required key missing - tainting kernel
[ 1200.094659] tty0tty null modem driver v1.2

And I do enjoy the dmks stuff from https://github.com/freemed/tty0tty/tree/master/debian (Upon new kernels I get new versions of tty0tty.) This is on Debian.

I think that original poster is being obstructed by some prevent loading of kernel modules that are not blessed by us measures. Such measures are often sold for "security" reasons.

So this issue now waits for updates like

• works for me on distro ...
• no problem here on distro ... version ...
• also got Operation not permitted on distro ... version ...
• also got Operation not permitted and could circumvent it with ...
• at $URL is documented how to cope this, following the process described over there allowed me to do what I want to do. Simply using tty0tty.

[stappersg]

Lockdown: modprobe: unsigned module loading is restricted; see man kernel_lockdown.7

That is another issue (that is unrelated to the code base of tty0tty).