On (05/14/19 21:13), Geert Uytterhoeven wrote: > I would immediately understand there's a missing IS_ERR() check in a > function that can return -EINVAL, without having to add a new printk() > to find out what kind of bogus value has been received, and without > having to reboot, and trying to reproduce... But chances are that missing IS_ERR() will crash the kernel sooner or later (in general case), if not in sprintf() then somewhere else. -ss