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I'm working with a real time scheduler developed at my university and when I run it I get "module verification failed: signature and/or required key missing - tainting kernel". I've learned that it might be because of some kernel module signing. Is it possible to dissable this on my ubuntu? I'm using ubuntu with VMplayer.
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Removing a module from the kernel You can remove a module from the running kernel with the sudo modprobe -r <module_name> command. You will get a warning if it's being used and the module will not be unloaded.
The kernel module signing facility cryptographically signs modules during installation and then checks the signature upon loading the module. This allows increased kernel security by disallowing the loading of unsigned modules or modules signed with an invalid key.
In order to prevent kernel modules loading during boot, the module name must be added to a configuration file for the "modprobe" utility. This file must reside in /etc/modprobe. d . Ensure the module is not configured to get loaded in either /etc/modprobe.
1 Answer. All kernel modules that are signed will have ~Module signature appended~\n appended to the end of the file. (Source) To find out if there are any unsigned kernel modules, you can simply search for all *.
Module signing is enabled within the kernel configuration file starting from kernel version 3.7, you can disable it by running make menuconfig within the kernel source directory and deselecting the Module Signature verification option within the Enable loadable kernel module menu option. After this you will have to recompile your kernel.
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