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Managing, monitoring, and updating the kernel
3.8. Unloading kernel modules at early stages of the boot process

3.8. Unloading kernel modules at early stages of the boot process

In certain situations, for example, when the kernel module has a code that causes the system to become unresponsive, and the user is not able to reach the stage to permanently disable the rogue kernel module, you might need to unload a kernel module early in the booting process. To temporarily block the loading of the kernel module, you can use a boot loader.

You can edit the relevant boot loader entry to unload the required kernel module before the booting sequence continues.

重要

The changes described in this procedure do not persist across system reboots. For information about how to add a kernel module to a denylist, see Preventing kernel modules from being automatically loaded at system boot time.

Prerequisites

You have a loadable kernel module that you want to prevent from loading.

Procedure

Boot the system into the boot loader.
Use the cursor keys to highlight the relevant boot loader entry.
Press the e key to edit the entry.
Use the cursor keys to navigate to the line that starts with linux.
Append modprobe.blacklist=module_name to the end of the line.
The serio_raw kernel module illustrates a rogue module to be unloaded early in the boot process.
Press Ctrl+X to boot using the modified configuration.

Verification

After the system boots, verify that the relevant kernel module is not loaded:
```
# lsmod | grep serio_raw
```

3.8. Unloading kernel modules at early stages of the boot process

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