MdeModulePkg/UsbMass: Reject device whose block size is 0 or > 64K

[mirror_edk2.git] / MdeModulePkg / Bus / Usb / UsbMassStorageDxe / UsbMassBoot.c

diff --git a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
index 0b35cbacf08c929dc9258698c9c21e9405187f56..c35c7bdc128b28317edc47983e78600721b95a85 100644 (file)
--- a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
+++ b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
@@ -736,6 +736,13 @@ UsbBootDetectMedia (
     return Status;\r
   }\r
 \r
+  //\r
+  // Simply reject device whose block size is unacceptable small (==0) or large (>64K).\r
+  //\r
+  if ((Media->BlockSize == 0) || (Media->BlockSize > USB_BOOT_MAX_CARRY_SIZE)) {\r
+    return EFI_DEVICE_ERROR;\r
+  }\r
+\r
   //\r
   // Detect whether it is necessary to reinstall the Block I/O Protocol.\r
   //\r