glib: integer overflow in g_bytes_new function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits

An integer wraparound was discovered in glib due to passing a 64 bit sized value to function gmemdup which accepts a 32 bits number as argument. An attacker may abuse this flaw when an application linked against the glib library uses gbytesnew function or possibly other functions that use gmemdup...