$ cc -O2 -Wall -o /root/evdev_uaf /root/evdev_uaf.c -lpthread
(no output — clean build; note: first draft had bufsz not a multiple of
sizeof(input_event)=24 which the kernel rejects with EINVAL at the
uio_resid % sizeof check, cdev.c:252; fixed by rounding down to whole
events)
BUILD-OK