sock_fprog32
#define PPPIOCSPASS32 _IOW('t', 71, struct sock_fprog32)
#define PPPIOCSACTIVE32 _IOW('t', 70, struct sock_fprog32)
static struct bpf_prog *compat_ppp_get_filter(struct sock_fprog32 __user *p)
struct sock_fprog32 uprog32;
if (copy_from_user(&uprog32, p, sizeof(struct sock_fprog32)))