Kernel panic when running custom network driver on Ubuntu 20.04
I've been struggling with this for a few days now and could really use some help. I'm trying to figure out I'm writing unit tests and I'm maintaining legacy code that Hey everyone, I'm running into an issue that's driving me crazy. I am currently developing a custom network driver for a specific hardware module on Ubuntu 20.04, and I am working with a kernel panic whenever I load the module using `insmod`. The panic occurs with the following behavior message: ``` [ 1234.567890] Kernel panic - not syncing: Fatal exception [ 1234.567891] CPU: 0 PID: 1234 Comm: insmod Tainted: G W OE [ 1234.567892] Call Trace: [ 1234.567893] dump_stack+0x6d/0x8c [ 1234.567894] panic+0xe1/0x1f0 [ 1234.567895] ... ``` I've ensured that my driver follows the correct structure and includes necessary initialization and cleanup functions. Here’s a simplified version of the driver's `init` function: ```c static int __init my_driver_init(void) { int ret; struct net_device *netdev; netdev = alloc_netdev(0, "my%d", NET_NAME_UNKNOWN, my_setup); if (!netdev) { printk(KERN_ERR "Failed to allocate net_device\n"); return -ENOMEM; } ret = register_netdev(netdev); if (ret) { printk(KERN_ERR "Failed to register net_device\n"); free_netdev(netdev); return ret; } return 0; } ``` I suspect that the scenario may be related to memory management or uninitialized data structures, but I can’t find any obvious problems. Additionally, I’ve compiled the module with debugging enabled and checked the output of `dmesg`, but it doesn’t provide much insight beyond confirming the panic. I’ve tried adding extra checks for pointers and validating all data structures before use, but the kernel panic continues. This has been very frustrating, especially since I can’t get any further information during the panic. Any insights on what could be going wrong or how to debug kernel panics in this context would be greatly appreciated! My development environment is macOS. I'm working on a web app that needs to handle this. How would you solve this? This is part of a larger web app I'm building. Could this be a known issue? Thanks in advance! My development environment is Windows 10. Thanks, I really appreciate it!