X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdeModulePkg%2FUniversal%2FNetwork%2FIp4Dxe%2FIp4Config2Impl.c;fp=MdeModulePkg%2FUniversal%2FNetwork%2FIp4Dxe%2FIp4Config2Impl.c;h=5b01b35b760e71c59d43625c1b4b9e779410df2e;hp=a931bb3e77286fce85334fe0e9647263c0cdd50c;hb=818ba0ef81516c0cc8de3ff9a97495fd02e4c8a7;hpb=ad13d7d2d4a1d329a60b414843a888c54bdbad73

diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
index a931bb3e77..5b01b35b76 100644
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
@@ -1255,6 +1255,13 @@ Ip4Config2SetMaunualAddress (
 
   NewAddress = *((EFI_IP4_CONFIG2_MANUAL_ADDRESS *) Data);
 
+  StationAddress = EFI_NTOHL (NewAddress.Address);
+  SubnetMask = EFI_NTOHL (NewAddress.SubnetMask);
+
+  if (NetGetMaskLength (SubnetMask) == IP4_MASK_NUM) {
+    return EFI_INVALID_PARAMETER;
+  }
+
   //
   // Store the new data, and init the DataItem status to EFI_NOT_READY because
   // we may have an asynchronous configuration process.
@@ -1273,9 +1280,6 @@ Ip4Config2SetMaunualAddress (
   DataItem->DataSize = DataSize;
   DataItem->Status   = EFI_NOT_READY;
 
-  StationAddress = EFI_NTOHL (NewAddress.Address);
-  SubnetMask = EFI_NTOHL (NewAddress.SubnetMask);
-
   IpSb->Reconfig = TRUE;
   Status = Ip4Config2SetDefaultAddr (IpSb, StationAddress, SubnetMask);
   if (EFI_ERROR (Status)) {