Ah, yes, I forgot about that. So indeed there is no non-racy hook point for the kernel to do such a check, even if it made sense and the RX/RW switch went throu

Ah, yes, I forgot about that. So indeed there is no non-racy hook point for the kernel to do such a check, even if it made sense and the RX/RW switch went through the kernel, which it doesn't.