Reviewed-by: Dandan Bi
Thanks,
Dandan
-Original Message-
From: Wang, Jian J
Sent: Wednesday, November 8, 2017 10:12 AM
To: edk2-devel@lists.01.org
Cc: Gao, Liming ; Bi, Dandan
Subject: [PATCH v3 3/3] IntelFrameworkModulePkg: Fix misuses of AllocateCopyPool
> v3:
>No updates.
> v2:
> a. Use ReallocatePool instead of allocating then copying wherever
> applicable
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: Liming Gao
Cc: Bi Dandan
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang
---
.../Universal/BdsDxe/DeviceMngr/DeviceManager.c| 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git
a/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
b/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
index 125c49db5e..5103c7e5d1 100644
--- a/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
+++ b/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.
+++ c
@@ -480,7 +480,11 @@ 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);
}
@@ -491,10 +495,6 @@ 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 ++;
--
2.14.1.windows.1
___
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel