Hello, I have registered a callback function in a kernel module with the Netfilter hook NF_IP_LOCAL_IN. In the function the following statements lead to a kernel freeze: set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(HZ); Another try (with the same result) for letting the hook function sleep for a certain amount of time: while (time_before(jiffies,jiffies+HZ)); The error message for the kernel oops is "scheduling while atomic" for both attempts. Why is this error ocurring? Are the Netfilter hooks atomic? How can a sleep in a hook function be achieved? Regards, Andreas Gaupmann
