On Fri, Sep 29, 2023 at 11:01:39AM -0700, Nuno Das Neves wrote: > +/* Define connection identifier type. */ > +union hv_connection_id { > + __u32 asu32; > + struct { > + __u32 id:24; > + __u32 reserved:8; Meta-commment, I don't see anywhere you are properly checking that all of the "reserved" areas of these structures are actually set to 0 when they are sent to you. If you don't do that, then they are not really reserved at all and can never be used in the future, so properly check them please. thanks, greg k-h