return 0;
}
+static bool valid_floppy_drive_params(const short autodetect[8])
+{
+ size_t floppy_type_size = ARRAY_SIZE(floppy_type);
+ size_t i = 0;
+
+ for (i = 0; i < 8; ++i) {
+ if (autodetect[i] < 0 ||
+ autodetect[i] >= floppy_type_size)
+ return false;
+ }
+
+ return true;
+}
+
static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
unsigned long param)
{
SUPBOUND(size, strlen((const char *)outparam) + 1);
break;
case FDSETDRVPRM:
+ if (!valid_floppy_drive_params(inparam.dp.autodetect))
+ return -EINVAL;
*UDP = inparam.dp;
break;
case FDGETDRVPRM:
return -EPERM;
if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params)))
return -EFAULT;
+ if (!valid_floppy_drive_params(v.autodetect))
+ return -EINVAL;
mutex_lock(&floppy_mutex);
UDP->cmos = v.cmos;
UDP->max_dtr = v.max_dtr;