Stupid double pointer free issue

[Neil Matthews]

Don't know how practical it is to find such an issue, but here's the code with/without the error -- dereferencing in the free() doesn't match dereferencing in the strdup().

[CHR]

receive_device_info_bad_free() may return a free'd pointer, but only in case the return value is -1. So that should be checked.
Cppcheck can't prove that any UB will happen here.