Apple macOS < 10.14.5 / iOS < 12.3 XNU - Wild-read due to bad cast in stf_ioctl

/ Reproduction Tested on macOS 10.14.3: $ clang -o stfwildread stfwildread.cc $ ./stfwildread Explanation SIOCSIFADDR is an ioctl that sets the address of an interface. The stf interface ioctls are handled by the stfioctl function. The crash occurs in the following case where a struct ifreq is re...