From 469293f8ee406f2b0bad2cf3bbbc510b2a1364eb Mon Sep 17 00:00:00 2001 From: Jian J Wang Date: Wed, 1 Nov 2017 23:18:34 +0800 Subject: [PATCH] MdeModulePkg: Fix misuses of AllocateCopyPool AllocateCopyPool(AllocationSize, *Buffer) will copy "AllocationSize" bytes of memory from old "Buffer" to new allocated one. If "AllocationSize" is bigger than size of "Buffer", heap memory overflow occurs during copy. One solution is to allocate pool first then copy the necessary bytes to new memory. Another is using ReallocatePool instead if old buffer will be freed on spot. Cc: Star Zeng Cc: Eric Dong Cc: Bi Dandan Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang Reviewed-by: Star Zeng Reviewed-by: Bi Dandan --- .../Application/UiApp/FrontPageCustomizedUiSupport.c | 8 ++++++-- .../BootMaintenanceManagerCustomizedUiSupport.c | 8 ++++++-- .../Library/DeviceManagerUiLib/DeviceManager.c | 10 +++++----- MdeModulePkg/Library/UefiHiiLib/HiiLib.c | 12 ++++++++---- .../FvSimpleFileSystemDxe/FvSimpleFileSystem.c | 3 ++- .../Universal/HiiDatabaseDxe/ConfigKeywordHandler.c | 9 ++++++--- 6 files changed, 33 insertions(+), 17 deletions(-) diff --git a/MdeModulePkg/Application/UiApp/FrontPageCustomizedUiSupport.c b/MdeModulePkg/Application/UiApp/FrontPageCustomizedUiSupport.c index 1505ef9319..17fc3db507 100644 --- a/MdeModulePkg/Application/UiApp/FrontPageCustomizedUiSupport.c +++ b/MdeModulePkg/Application/UiApp/FrontPageCustomizedUiSupport.c @@ -639,9 +639,13 @@ UiListThirdPartyDrivers ( Count++; if (Count >= CurrentSize) { - DriverListPtr = AllocateCopyPool ((Count + UI_HII_DRIVER_LIST_SIZE) * sizeof (UI_HII_DRIVER_INSTANCE), gHiiDriverList); + DriverListPtr = ReallocatePool ( + CurrentSize * sizeof (UI_HII_DRIVER_INSTANCE), + (Count + UI_HII_DRIVER_LIST_SIZE) + * sizeof (UI_HII_DRIVER_INSTANCE), + gHiiDriverList + ); ASSERT (DriverListPtr != NULL); - FreePool (gHiiDriverList); gHiiDriverList = DriverListPtr; CurrentSize += UI_HII_DRIVER_LIST_SIZE; } diff --git a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManagerCustomizedUiSupport.c b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManagerCustomizedUiSupport.c index b25bc67c06..6dd4fce139 100644 --- a/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManagerCustomizedUiSupport.c +++ b/MdeModulePkg/Library/BootMaintenanceManagerUiLib/BootMaintenanceManagerCustomizedUiSupport.c @@ -435,9 +435,13 @@ BmmListThirdPartyDrivers ( Count++; if (Count >= CurrentSize) { - DriverListPtr = AllocateCopyPool ((Count + UI_HII_DRIVER_LIST_SIZE) * sizeof (UI_HII_DRIVER_INSTANCE), gHiiDriverList); + DriverListPtr = ReallocatePool ( + CurrentSize * sizeof (UI_HII_DRIVER_INSTANCE), + (Count + UI_HII_DRIVER_LIST_SIZE) + * sizeof (UI_HII_DRIVER_INSTANCE), + gHiiDriverList + ); ASSERT (DriverListPtr != NULL); - FreePool (gHiiDriverList); gHiiDriverList = DriverListPtr; CurrentSize += UI_HII_DRIVER_LIST_SIZE; } diff --git a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c index 23ae6c5392..ac8a975bf6 100644 --- a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c +++ b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c @@ -240,7 +240,11 @@ AddIdToMacDeviceList ( } else { mMacDeviceList.MaxListLen += MAX_MAC_ADDRESS_NODE_LIST_LEN; if (mMacDeviceList.CurListLen != 0) { - TempDeviceList = (MENU_INFO_ITEM *)AllocateCopyPool (sizeof (MENU_INFO_ITEM) * mMacDeviceList.MaxListLen, (VOID *)mMacDeviceList.NodeList); + TempDeviceList = ReallocatePool ( + sizeof (MENU_INFO_ITEM) * mMacDeviceList.CurListLen, + sizeof (MENU_INFO_ITEM) * mMacDeviceList.MaxListLen, + mMacDeviceList.NodeList + ); } else { TempDeviceList = (MENU_INFO_ITEM *)AllocatePool (sizeof (MENU_INFO_ITEM) * mMacDeviceList.MaxListLen); } @@ -251,10 +255,6 @@ AddIdToMacDeviceList ( TempDeviceList[mMacDeviceList.CurListLen].PromptId = PromptId; TempDeviceList[mMacDeviceList.CurListLen].QuestionId = (EFI_QUESTION_ID) (mMacDeviceList.CurListLen + NETWORK_DEVICE_LIST_KEY_OFFSET); - if (mMacDeviceList.CurListLen > 0) { - FreePool(mMacDeviceList.NodeList); - } - mMacDeviceList.NodeList = TempDeviceList; } mMacDeviceList.CurListLen ++; diff --git a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c index ce894c08b5..f9b8c3df27 100644 --- a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c +++ b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c @@ -464,20 +464,24 @@ HiiGetFormSetFromHiiHandle( } if (FormSetBuffer != NULL){ - TempBuffer = AllocateCopyPool (TempSize + ((EFI_IFR_OP_HEADER *) OpCodeData)->Length, FormSetBuffer); - FreePool(FormSetBuffer); - FormSetBuffer = NULL; + TempBuffer = ReallocatePool ( + TempSize, + TempSize + ((EFI_IFR_OP_HEADER *) OpCodeData)->Length, + FormSetBuffer + ); if (TempBuffer == NULL) { Status = EFI_OUT_OF_RESOURCES; goto Done; } CopyMem (TempBuffer + TempSize, OpCodeData, ((EFI_IFR_OP_HEADER *) OpCodeData)->Length); + FormSetBuffer = NULL; } else { - TempBuffer = AllocateCopyPool (TempSize + ((EFI_IFR_OP_HEADER *) OpCodeData)->Length, OpCodeData); + TempBuffer = AllocatePool (TempSize + ((EFI_IFR_OP_HEADER *) OpCodeData)->Length); if (TempBuffer == NULL) { Status = EFI_OUT_OF_RESOURCES; goto Done; } + CopyMem (TempBuffer, OpCodeData, ((EFI_IFR_OP_HEADER *) OpCodeData)->Length); } TempSize += ((EFI_IFR_OP_HEADER *) OpCodeData)->Length; FormSetBuffer = TempBuffer; diff --git a/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c b/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c index b81110ff98..e39036aed9 100644 --- a/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c +++ b/MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c @@ -562,7 +562,8 @@ FvSimpleFileSystemOpen ( // No, there was no extension. So add one and search again for the file // NewFileNameLength = FileNameLength + 1 + 4 = (Number of non-null character) + (file extension) + (a null character) NewFileNameLength = FileNameLength + 1 + 4; - FileNameWithExtension = AllocateCopyPool (NewFileNameLength * 2, FileName); + FileNameWithExtension = AllocatePool (NewFileNameLength * 2); + StrCpyS (FileNameWithExtension, NewFileNameLength, FileName); StrCatS (FileNameWithExtension, NewFileNameLength, L".EFI"); for (FvFileInfoLink = GetFirstNode (&Instance->FileInfoHead); diff --git a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigKeywordHandler.c b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigKeywordHandler.c index 1b48c1cebe..5d5f17fb17 100644 --- a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigKeywordHandler.c +++ b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigKeywordHandler.c @@ -2543,12 +2543,15 @@ MergeToMultiKeywordResp ( MultiKeywordRespLen = (StrLen (*MultiKeywordResp) + 1 + StrLen (*KeywordResp) + 1) * sizeof (CHAR16); - StringPtr = AllocateCopyPool (MultiKeywordRespLen, *MultiKeywordResp); + StringPtr = ReallocatePool ( + StrSize (*MultiKeywordResp), + MultiKeywordRespLen, + *MultiKeywordResp + ); if (StringPtr == NULL) { return EFI_OUT_OF_RESOURCES; } - - FreePool (*MultiKeywordResp); + *MultiKeywordResp = StringPtr; StrCatS (StringPtr, MultiKeywordRespLen / sizeof (CHAR16), L"&");