On Fri, 10 May 2019 10:42:13 +0200 Petr Mladek <pmladek@xxxxxxxx> wrote: > static const char *check_pointer_msg(const void *ptr) > { > - char byte; > - > if (!ptr) > return "(null)"; > > - if (probe_kernel_address(ptr, byte)) > + if ((unsigned long)ptr < PAGE_SIZE || IS_ERR_VALUE(ptr)) > return "(efault)"; > < PAGE_SIZE ? do you mean: < TASK_SIZE ? -- Steve