On 02/14, Gregory Price wrote:

+struct compat_ptrace_sud_config {
+        compat_ulong_t mode;
+        compat_uptr_t selector;
+        compat_ulong_t offset;
+        compat_ulong_t len;
+};

...

+int syscall_user_dispatch_get_config(struct task_struct *task, unsigned long size,
+		                     void __user *data)
+{
+	struct syscall_user_dispatch *sd = &task->syscall_dispatch;
+#ifdef CONFIG_COMPAT
+	if (unlikely(in_compat_syscall())) {
+		struct compat_ptrace_sud_config cfg32;
+
+		if (size != sizeof(struct compat_ptrace_sud_config))
+			return -EINVAL;
+

Horror ;) why?

See my reply to v9, just make

	struct ptrace_sud_config {
		__u8  mode;
		__u64 selector;
		__u64 offset;
		__u64 len;
	};

Oleg.