Linux Kernel Module & System-Level Development

I will design and develop a custom Linux kernel module or system-level tool — covering character device driver, netfilter hook, procfs or sysfs interface, or a performance-critical userspace tool using low-level POSIX APIs — built to your functional specification, compiled against your target kernel version, and delivered with loading/unloading scripts, documentation, and the kernel build configuration required to compile it in your environment. Kernel and system-level development requires a fundamentally different skill set from application programming; memory management without a garbage collector, interrupt context constraints, locking discipline, and the absence of standard library functions make kernel modules an area where the cost of errors is system stability rather than a user-facing bug.

The deliverable includes the C source code for the module or tool, a Makefile configured for out-of-tree kernel module build or application compilation, insmod/rmmod script with parameter documentation, dmesg log examples showing correct operation, and a technical document covering the design decisions, data structures used, and any kernel version compatibility considerations. Tested on your specified kernel version in a VM before delivery.

This service suits embedded systems engineers, security researchers, performance engineers, network infrastructure teams, and hardware vendors requiring custom kernel modules for device drivers, network packet processing, performance instrumentation, or system call interposition.