Index: sys/compat/linux/linux_file.c
===================================================================
--- sys/compat/linux/linux_file.c
+++ sys/compat/linux/linux_file.c
@@ -2039,13 +2039,28 @@
 int
 linux_splice(struct thread *td, struct linux_splice_args *args)
 {
+	l_loff_t inoff, outoff, *inoffp, *outoffp;
+	int error;
 
-	linux_msg(td, "syscall splice not really implemented");
+	inoffp = outoffp = NULL;
+	if (args->off_in != NULL) {
+		error = copyin(args->off_in, &inoff, sizeof(inoff));
+		if (error != 0)
+			return (error);
+		inoffp = &inoff;
+	}
+	if (args->off_out != NULL) {
+		error = copyin(args->off_out, &outoff, sizeof(outoff));
+		if (error != 0)
+			return (error);
+		outoffp = &outoff;
+	}
+	error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out,
+	    outoffp, args->len, 0);
+	if (error == 0 && args->off_in != NULL)
+		error = copyout(inoffp, args->off_in, sizeof(*inoffp));
+	if (error == 0 && args->off_out != NULL)
+		error = copyout(outoffp, args->off_out, sizeof(*outoffp));
 
-	/*
-	 * splice(2) is documented to return EINVAL in various circumstances;
-	 * returning it instead of ENOSYS should hint the caller to use fallback
-	 * instead.
-	 */
-	return (EINVAL);
+	return (error);
 }