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MdeModulePkg/PciSioSerialDxe:add non-null pointer dereference assertion 

Add assertion to make sure there doesn't exist null pointer dereference.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Qiu Shumin <shumin.qiu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19308 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Feng Tian 2015-12-17 00:48:16 +00:00 committed by erictian
parent b3705c1d21
commit 12f5ff97f6
1 changed files with 3 additions and 0 deletions
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3
MdeModulePkg/Bus/Pci/PciSioSerialDxe/Serial.c
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@ -870,6 +870,7 @@ SerialControllerDriverStart (
if ((SerialDeviceCount != 0) && (RemainingDevicePath != NULL)) {
Uart = (UART_DEVICE_PATH *) SkipControllerDevicePathNode (RemainingDevicePath, &ContainsControllerNode, &ControllerNumber);
for (Index = 0; Index < SerialDeviceCount; Index++) {
ASSERT ((SerialDevices != NULL) && (SerialDevices[Index] != NULL));
if ((!SerialDevices[Index]->ContainsControllerNode && !ContainsControllerNode) ||
(SerialDevices[Index]->ContainsControllerNode && ContainsControllerNode && SerialDevices[Index]->Instance == ControllerNumber)
) {
@ -963,6 +964,7 @@ SerialControllerDriverStart (
// Restore the PCI attributes when all children is destroyed (PciDeviceInfo->ChildCount == 0).
//
PciDeviceInfo = AllocatePool (sizeof (PCI_DEVICE_INFO));
ASSERT (PciDeviceInfo != NULL);
PciDeviceInfo->ChildCount = 0;
PciDeviceInfo->PciIo = ParentIo.PciIo;
Status = ParentIo.PciIo->Attributes (
@ -993,6 +995,7 @@ SerialControllerDriverStart (
//
// Re-use the PciDeviceInfo stored in existing children.
//
ASSERT ((SerialDevices != NULL) && (SerialDevices[0] != NULL));
PciDeviceInfo = SerialDevices[0]->PciDeviceInfo;
ASSERT (PciDeviceInfo != NULL);
}