bad_stack 53 drivers/misc/lkdtm/usercopy.c unsigned char *bad_stack; bad_stack 62 drivers/misc/lkdtm/usercopy.c bad_stack = do_usercopy_stack_callee((uintptr_t)&bad_stack); bad_stack 65 drivers/misc/lkdtm/usercopy.c bad_stack = task_stack_page(current) + THREAD_SIZE; bad_stack 66 drivers/misc/lkdtm/usercopy.c bad_stack -= sizeof(unsigned long); bad_stack 86 drivers/misc/lkdtm/usercopy.c if (copy_to_user((void __user *)user_addr, bad_stack, bad_stack 107 drivers/misc/lkdtm/usercopy.c if (copy_from_user(bad_stack, (void __user *)user_addr,