486 	struct frame_tail buftail;  in unwind_user_frame()  local
491 	if (!access_ok(tail, sizeof(buftail)))  in unwind_user_frame()
495 	err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));  in unwind_user_frame()
501 	lr = ptrauth_strip_user_insn_pac(buftail.lr);  in unwind_user_frame()
510 	if (tail >= buftail.fp)  in unwind_user_frame()
513 	return buftail.fp;  in unwind_user_frame()
535 	struct compat_frame_tail buftail;  in unwind_compat_user_frame()  local
539 	if (!access_ok(tail, sizeof(buftail)))  in unwind_compat_user_frame()
543 	err = __copy_from_user_inatomic(&buftail, tail, sizeof(buftail));  in unwind_compat_user_frame()
549 	if (!consume_entry(cookie, buftail.lr))  in unwind_compat_user_frame()
557 			compat_ptr(buftail.fp))  in unwind_compat_user_frame()
560 	return (struct compat_frame_tail __user *)compat_ptr(buftail.fp) - 1;  in unwind_compat_user_frame()