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I'm working with WSL2 on Windows, running Ubuntu (and I've tried Arch as well), and I'm encountering some odd behavior with the Linux kernel symbols, specifically around the printk function. It feels ...
1 vote
0 answers
32 views

I am working on a Raspberry Pi 5 (aarch64). uname -a: Linux rpi5 6.8.0-1036-raspi #40-Ubuntu SMP PREEMPT_DYNAMIC Mon Aug 18 09:50:42 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux I load a kernel module I ...
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0 answers
60 views

I'm writing a Linux kernel module that prints the routing tables using dmesg. To do this, I'm trying to use the fib_get_table function to access FIB (Forwarding Information Base) tables. Here’s a ...
0 votes
1 answer
137 views

Intro I have this solution. MNWE - (Minimum Non-Working Example) ChatGPT gave me the following test app: #include <windows.h> #include <stdio.h> #define DEVICE_PATH "\\\\.\\...
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1 answer
69 views

I have a yocto image for an ARM target. I am building kernel modules on the ARM target and have found an odd problem. Can anyone suggest a solution? On the target I have run "make scripts ...
3 votes
2 answers
262 views

I am having an issue with my module compilation written in C for Kernel and I even can't find documentation which would be helpful. My issue looks like following. There are several files written in C ...
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0 answers
140 views

I have a module who open mmc blockdevice, inspired of block2mtd.c driver on linux 5.1. It works successfully when my driver is as module and "modprobe" after kernel started. But it fail when ...
1 vote
1 answer
306 views

I am trying to understand this linux DMA driver I am compiling it for this kernel On compilation, I am getting the error: drivers/dma/msgdma/msgdma.c:342:25: error: implicit declaration of function ‘...
1 vote
0 answers
129 views

I've been working on learning cross-compilation for embedded linux, with the eventual end goal being to compile an RTL8188 Wifi USB dongle kernel module for an old embedded linux device that doesn't ...
1 vote
0 answers
71 views

I am writing a kernel module which makes some low level experiments, and I've noticed that the HW prefetcher is intrupting them. I want to disable it while the experiemnts run. I am running on Pixel 8 ...
0 votes
0 answers
163 views

I have a self-build kernel 6.6.27 from kernel source tree on ubuntu 20 04 When I compile the vendor-provided driver source, I got the error message as below, Check old driver and unload it. Build the ...
2 votes
1 answer
250 views

I'm working on a Linux kernel driver that allocates memory with dma_alloc_coherent() and maps it to userspace using mmap. This works perfectly on kernel 4.18 (tested on 4.18.0-553.47.1.el8_10.x86_64), ...
1 vote
0 answers
95 views

I am programing my own rootkit (for learning kernel programming). I use kprobes to hijack open syscall so it works on newest kernels. I tested the hooking and it works fine. I want to get the real ...
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0 answers
130 views

I am trying to build "Hello, World" kernel module on Ubuntu 22.04 with Linux Kernel 6.1.25. However, when I run make, I encounter the following errors related to AddressSanitizer (ASan): ...
1 vote
1 answer
674 views

So, I have configured a kernel, and installed it by using make install and make module_install Now, I want to compile out-of-tree kernel modules but obviously the linux-header-$(uname -r) package ...

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