Don't overwrite array bounds when mass storage device reports > 2 LUNs

7 years ago · 8f1d3d9a72
parent 0c7cc00c0a
commit 8f1d3d9a72
1 changed files with 4 additions and 0 deletions
--- a/Downstream/Middlewares/ST/STM32_USB_Host_Library/Class/MSC/Src/usbh_msc.c
+++ b/Downstream/Middlewares/ST/STM32_USB_Host_Library/Class/MSC/Src/usbh_msc.c
@ -300,6 +300,10 @@ static USBH_StatusTypeDef USBH_MSC_ClassRequest(USBH_HandleTypeDef *phost)
      MSC_Handle->max_lun = (uint8_t )(MSC_Handle->max_lun) + 1;
      USBH_UsrLog ("Number of supported LUN: %lu", (int32_t)(MSC_Handle->max_lun));
      
+      if (MSC_Handle->max_lun > MAX_SUPPORTED_LUN)
+      {
+          MSC_Handle->max_lun = MAX_SUPPORTED_LUN;
+      }
      for(i = 0; i < MSC_Handle->max_lun; i++)
      {
        MSC_Handle->unit[i].prev_ready_state = USBH_FAIL;