Thread overran stack, or stack corrupted
 

I think the main error here is "Thread overran stack, or stack corrupted", but I'm not sure what that means in relation to what I might be doing wrong in my module. Can anyone explain this better or have any thoughts as to how to track down this oops?

the kernel places the value STACK_END_MAGIC at the end of the stack
when there is a fault in kernel space the value of STACK_END_MAGIC is checked
if it's been overwritten you get the message Thread overran stack, or stack corrupted
so basically you just ran the pointer past the stack end

stackend = end_of_stack(tsk);
if (tsk != &init_task && *stackend != STACK_END_MAGIC)
printk(KERN_ALERT "Thread overran stack, or stack corrupted\n");