(Ubuntu/Arch)Header 127 Bug, Script to patch and compile the kernel

Software & Operating Systems
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1

Hello Level1

Been recently active on the forum helping some people with the header 127 bug and compiling the kernel to fix that bug. I have taken some time today to create a Python script that will download and compile the current kernel and apply the patch for you, currently this is for Ubuntu.

Only created a couple of scripts in my Linux journey, Enjoy my dudes :wink:

2 Likes
2

Created a script for Arch as well

3

Using your script as reference, I wrote a script to build a 5.2 kernel in debian 10 buster. I think it could be improved but I will leave it if you want to test it.

EDIT: retested script and removed unecessary packages, changed the way it writes the repo file and few tweaks. Script is runned with sudo ./NAME_OF_SCRIPT.py

#!/usr/bin/env python3

import os
import sys
import fileinput
import shutil
import time

##Variables
homedir = os.path.expanduser("~")
systemInfo = os.uname()
KernelVersion = '5.2'
KernelVersionPackage = '5.2.0-0.bpo.2-amd64'
PatchURL = 'https://clbin.com/VCiYJ'
SuffixKernelString = 'patched'

##Script Start
print ("This script will download and compile the latest linux")
input("Press ENTER to continue...")

##Enable backports
print("Enable backports build sources")
time.sleep(1)
#os.system("sudo /usr/bin/echo 'deb http://deb.debian.org/debian buster-backports main contrib non-free' > /etc/apt/sources.list.d/backports.list")
backportsfile = open("/etc/apt/sources.list.d/backports.list", "w+")
backportsfile.write("deb http://deb.debian.org/debian buster-backports main contrib non-free") 
backportsfile.close()

os.system("sudo apt update")
time.sleep(1)

##Required packages
print("Downloading required packages")
os.system("apt-get -t buster-backports install build-essential libncurses-dev bison flex libssl-dev libelf-dev linux-image-"+KernelVersionPackage+" linux-headers-"+KernelVersionPackage+" linux-source-"+KernelVersion)

##Delete existing compiled kernel, and source folder, in case the script is being rerunned
os.system("rm -rif /usr/src/linux-*"+KernelVersion+"*.deb")
os.system("rm -rif /usr/src/linux-source-"+KernelVersion+"/")

##Extracting Kernel
print("Extracting kernel")
os.chdir("/usr/src")
os.system("tar -xvf linux-source-"+KernelVersion+".tar.xz")

##Applying Patch
os.system('clear')
os.chdir("/usr/src/linux-source-"+KernelVersion)
os.system("wget "+PatchURL+" -O /usr/src/linux-source-"+KernelVersion+"/pci.patch")
print("Applying kernel patch\n")
time.sleep(1)
os.system("patch -p1 < pci.patch")
time.sleep(1)

##Copy current config
os.system("cp /boot/config-"+KernelVersionPackage+" /usr/src/linux-source-"+KernelVersion+"/.config")

##Replace required line in debian config
for line in fileinput.input("/usr/src/linux-source-"+KernelVersion+"/.config", inplace=True):
    if line.strip().startswith('CONFIG_SYSTEM_TRUSTED_KEYS='):
        line = 'CONFIG_SYSTEM_TRUSTED_KEYS=""\n'
    sys.stdout.write(line)

##Compile kernel
time.sleep(1)
print("Are you ready to compile the kernel\n")
input("Press ENTER to continue...")
os.system("make -j`nproc` bindeb-pkg LOCALVERSION=-"+SuffixKernelString)

##Install compile kernel
answer = None
while answer not in ("yes", "no"):
	answer = input("Do you wish to install the kernel now?, Enter yes or no: ")
	if answer == "yes":
		os.chdir("/usr/src")
		os.system("dpkg -i linux-headers-*-"+SuffixKernelString+"_*_amd64.deb")
		os.system("dpkg -i linux-image-*-"+SuffixKernelString+"_*_amd64.deb")
		print("\nPlease reboot to apply changes and load the newly complied kernel")
	elif answer == "no":
		exit()
	else:
		print("Please enter yes or no.")
1 Like
4

Thanks man, i will give it a test

5

Tried the script, getting errors

  File "./Debcompile.py", line 45, in <module>
    os.chdir("/usr/src/linux-source-"+KernelVersion)
FileNotFoundError: [Errno 2] No such file or directory: '/usr/src/linux-source-5.2'
6

Strange I tested in a recently in a clena install on a vm and worked.

The command:

apt-get install linux-source-5.2

install the necessary file /usr/src/linux-source.tar.xz (on the script is executed on line 32) and the script should extract it on line 41. did the script installed that file ?

by the way how do you run the script ? I run with

python3 NAME_OF_SCRIPT

can you test that way ?
and not

python NAME_OF_SCRIPT

7

checked for the kernel in usr/src and there was no file, and for running it i did it as ./DebCompile.py and i set it to use python3

9

retested, made a few changes and edited the post. try it again with sudo ./NAME_OF_SCRIPT.py