REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4060
Function CreateDeviceNode may return NULL point when NodeLength is
smaller than a device path header or there is not enough
memory to allocate. But after calling CreateDeviceNode, the
pointer is dereferenced without checking its value.
So is it nessary to check the value of point before using.
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang....@intel.com>
Signed-off-by: Wenyi Xie <xiewen...@huawei.com>
---
MdePkg/Library/UefiDevicePathLib/DevicePathFromText.c | 240
++++++++++++++++++++
1 file changed, 240 insertions(+)
diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathFromText.c
b/MdePkg/Library/UefiDevicePathLib/DevicePathFromText.c
index 1aaa968d6fb5..702b4ad74b30 100644
--- a/MdePkg/Library/UefiDevicePathLib/DevicePathFromText.c
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathFromText.c
@@ -388,6 +388,10 @@ DevPathFromTextGenericPath (
(UINT16)(sizeof (EFI_DEVICE_PATH_PROTOCOL) + DataLength)
);
+ if (Node == NULL) {
+ return NULL;
+ }
+
StrHexToBytes (DataStr, DataLength * 2, (UINT8 *)(Node + 1), DataLength);
return Node;
}
@@ -453,6 +457,10 @@ DevPathFromTextPci (
(UINT16)sizeof (PCI_DEVICE_PATH)
);
+ if (Pci == NULL) {
+ return NULL;
+ }
+
Pci->Function = (UINT8)Strtoi (FunctionStr);
Pci->Device = (UINT8)Strtoi (DeviceStr);
@@ -482,6 +490,10 @@ DevPathFromTextPcCard (
(UINT16)sizeof
(PCCARD_DEVICE_PATH)
);
+ if (Pccard == NULL) {
+ return NULL;
+ }
+
Pccard->FunctionNumber = (UINT8)Strtoi (FunctionNumberStr);
return (EFI_DEVICE_PATH_PROTOCOL *)Pccard;
@@ -514,6 +526,10 @@ DevPathFromTextMemoryMapped (
(UINT16)sizeof
(MEMMAP_DEVICE_PATH)
);
+ if (MemMap == NULL) {
+ return NULL;
+ }
+
MemMap->MemoryType = (UINT32)Strtoi (MemoryTypeStr);
Strtoi64 (StartingAddressStr, &MemMap->StartingAddress);
Strtoi64 (EndingAddressStr, &MemMap->EndingAddress);
@@ -559,6 +575,10 @@ ConvertFromTextVendor (
(UINT16)(sizeof (VENDOR_DEVICE_PATH) +
Length)
);
+ if (Vendor == NULL) {
+ return NULL;
+ }
+
StrToGuid (GuidStr, &Vendor->Guid);
StrHexToBytes (DataStr, Length * 2, (UINT8 *)(Vendor + 1), Length);
@@ -607,6 +627,11 @@ DevPathFromTextCtrl (
HW_CONTROLLER_DP,
(UINT16)sizeof
(CONTROLLER_DEVICE_PATH)
);
+
+ if (Controller == NULL) {
+ return NULL;
+ }
+
Controller->ControllerNumber = (UINT32)Strtoi (ControllerStr);
return (EFI_DEVICE_PATH_PROTOCOL *)Controller;
@@ -637,6 +662,10 @@ DevPathFromTextBmc (
(UINT16)sizeof (BMC_DEVICE_PATH)
);
+ if (BmcDp == NULL) {
+ return NULL;
+ }
+
BmcDp->InterfaceType = (UINT8)Strtoi (InterfaceTypeStr);
WriteUnaligned64 (
(UINT64 *)(&BmcDp->BaseAddress),
@@ -706,6 +735,10 @@ DevPathFromTextAcpi (
(UINT16)sizeof (ACPI_HID_DEVICE_PATH)
);
+ if (Acpi == NULL) {
+ return NULL;
+ }
+
Acpi->HID = EisaIdFromText (HIDStr);
Acpi->UID = (UINT32)Strtoi (UIDStr);
@@ -737,6 +770,10 @@ ConvertFromTextAcpi (
(UINT16)sizeof (ACPI_HID_DEVICE_PATH)
);
+ if (Acpi == NULL) {
+ return NULL;
+ }
+
Acpi->HID = EFI_PNP_ID (PnPId);
Acpi->UID = (UINT32)Strtoi (UIDStr);
@@ -878,6 +915,10 @@ DevPathFromTextAcpiEx (
Length
);
+ if (AcpiEx == NULL) {
+ return NULL;
+ }
+
AcpiEx->HID = EisaIdFromText (HIDStr);
AcpiEx->CID = EisaIdFromText (CIDStr);
AcpiEx->UID = (UINT32)Strtoi (UIDStr);
@@ -920,6 +961,10 @@ DevPathFromTextAcpiExp (
Length
);
+ if (AcpiEx == NULL) {
+ return NULL;
+ }
+
AcpiEx->HID = EisaIdFromText (HIDStr);
//
// According to UEFI spec, the CID parametr is optional and has a default
value of 0.
@@ -1040,6 +1085,10 @@ DevPathFromTextAta (
(UINT16)sizeof (ATAPI_DEVICE_PATH)
);
+ if (Atapi == NULL) {
+ return NULL;
+ }
+
PrimarySecondaryStr = GetNextParamStr (&TextDeviceNode);
SlaveMasterStr = GetNextParamStr (&TextDeviceNode);
LunStr = GetNextParamStr (&TextDeviceNode);
@@ -1090,6 +1139,10 @@ DevPathFromTextScsi (
(UINT16)sizeof (SCSI_DEVICE_PATH)
);
+ if (Scsi == NULL) {
+ return NULL;
+ }
+
Scsi->Pun = (UINT16)Strtoi (PunStr);
Scsi->Lun = (UINT16)Strtoi (LunStr);
@@ -1121,6 +1174,10 @@ DevPathFromTextFibre (
(UINT16)sizeof
(FIBRECHANNEL_DEVICE_PATH)
);
+ if (Fibre == NULL) {
+ return NULL;
+ }
+
Fibre->Reserved = 0;
Strtoi64 (WWNStr, &Fibre->WWN);
Strtoi64 (LunStr, &Fibre->Lun);
@@ -1153,6 +1210,10 @@ DevPathFromTextFibreEx (
(UINT16)sizeof
(FIBRECHANNELEX_DEVICE_PATH)
);
+ if (FibreEx == NULL) {
+ return NULL;
+ }
+
FibreEx->Reserved = 0;
Strtoi64 (WWNStr, (UINT64 *)(&FibreEx->WWN));
Strtoi64 (LunStr, (UINT64 *)(&FibreEx->Lun));
@@ -1186,6 +1247,10 @@ DevPathFromText1394 (
(UINT16)sizeof (F1394_DEVICE_PATH)
);
+ if (F1394DevPath == NULL) {
+ return NULL;
+ }
+
F1394DevPath->Reserved = 0;
F1394DevPath->Guid = StrHexToUint64 (GuidStr);
@@ -1217,6 +1282,10 @@ DevPathFromTextUsb (
(UINT16)sizeof (USB_DEVICE_PATH)
);
+ if (Usb == NULL) {
+ return NULL;
+ }
+
Usb->ParentPortNumber = (UINT8)Strtoi (PortStr);
Usb->InterfaceNumber = (UINT8)Strtoi (InterfaceStr);
@@ -1246,6 +1315,10 @@ DevPathFromTextI2O (
(UINT16)sizeof (I2O_DEVICE_PATH)
);
+ if (I2ODevPath == NULL) {
+ return NULL;
+ }
+
I2ODevPath->Tid = (UINT32)Strtoi (TIDStr);
return (EFI_DEVICE_PATH_PROTOCOL *)I2ODevPath;
@@ -1282,6 +1355,10 @@ DevPathFromTextInfiniband (
(UINT16)sizeof
(INFINIBAND_DEVICE_PATH)
);
+ if (InfiniBand == NULL) {
+ return NULL;
+ }
+
InfiniBand->ResourceFlags = (UINT32)Strtoi (FlagsStr);
StrToGuid (GuidStr, (EFI_GUID *)InfiniBand->PortGid);
Strtoi64 (SidStr, &InfiniBand->ServiceId);
@@ -1331,6 +1408,11 @@ DevPathFromTextVenPcAnsi (
MSG_VENDOR_DP,
(UINT16)sizeof (VENDOR_DEVICE_PATH)
);
+
+ if (Vendor == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Vendor->Guid, &gEfiPcAnsiGuid);
return (EFI_DEVICE_PATH_PROTOCOL *)Vendor;
@@ -1356,6 +1438,11 @@ DevPathFromTextVenVt100 (
MSG_VENDOR_DP,
(UINT16)sizeof (VENDOR_DEVICE_PATH)
);
+
+ if (Vendor == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Vendor->Guid, &gEfiVT100Guid);
return (EFI_DEVICE_PATH_PROTOCOL *)Vendor;
@@ -1381,6 +1468,11 @@ DevPathFromTextVenVt100Plus (
MSG_VENDOR_DP,
(UINT16)sizeof (VENDOR_DEVICE_PATH)
);
+
+ if (Vendor == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Vendor->Guid, &gEfiVT100PlusGuid);
return (EFI_DEVICE_PATH_PROTOCOL *)Vendor;
@@ -1406,6 +1498,11 @@ DevPathFromTextVenUtf8 (
MSG_VENDOR_DP,
(UINT16)sizeof (VENDOR_DEVICE_PATH)
);
+
+ if (Vendor == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Vendor->Guid, &gEfiVTUTF8Guid);
return (EFI_DEVICE_PATH_PROTOCOL *)Vendor;
@@ -1434,6 +1531,10 @@ DevPathFromTextUartFlowCtrl (
(UINT16)sizeof
(UART_FLOW_CONTROL_DEVICE_PATH)
);
+ if (UartFlowControl == NULL) {
+ return NULL;
+ }
+
CopyGuid (&UartFlowControl->Guid, &gEfiUartDevicePathGuid);
if (StrCmp (ValueStr, L"XonXoff") == 0) {
UartFlowControl->FlowControlMap = 2;
@@ -1485,6 +1586,10 @@ DevPathFromTextSAS (
(UINT16)sizeof (SAS_DEVICE_PATH)
);
+ if (Sas == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Sas->Guid, &gEfiSasDevicePathGuid);
Strtoi64 (AddressStr, &Sas->SasAddress);
Strtoi64 (LunStr, &Sas->Lun);
@@ -1580,6 +1685,10 @@ DevPathFromTextSasEx (
(UINT16)sizeof (SASEX_DEVICE_PATH)
);
+ if (SasEx == NULL) {
+ return NULL;
+ }
+
Strtoi64 (AddressStr, &SasAddress);
Strtoi64 (LunStr, &Lun);
WriteUnaligned64 ((UINT64 *)&SasEx->SasAddress, SwapBytes64 (SasAddress));
@@ -1663,6 +1772,10 @@ DevPathFromTextNVMe (
(UINT16)sizeof
(NVME_NAMESPACE_DEVICE_PATH)
);
+ if (Nvme == NULL) {
+ return NULL;
+ }
+
Nvme->NamespaceId = (UINT32)Strtoi (NamespaceIdStr);
Uuid = (UINT8 *)&Nvme->NamespaceUuid;
@@ -1699,6 +1812,10 @@ DevPathFromTextUfs (
(UINT16)sizeof (UFS_DEVICE_PATH)
);
+ if (Ufs == NULL) {
+ return NULL;
+ }
+
Ufs->Pun = (UINT8)Strtoi (PunStr);
Ufs->Lun = (UINT8)Strtoi (LunStr);
@@ -1728,6 +1845,10 @@ DevPathFromTextSd (
(UINT16)sizeof (SD_DEVICE_PATH)
);
+ if (Sd == NULL) {
+ return NULL;
+ }
+
Sd->SlotNumber = (UINT8)Strtoi (SlotNumberStr);
return (EFI_DEVICE_PATH_PROTOCOL *)Sd;
@@ -1756,6 +1877,10 @@ DevPathFromTextEmmc (
(UINT16)sizeof (EMMC_DEVICE_PATH)
);
+ if (Emmc == NULL) {
+ return NULL;
+ }
+
Emmc->SlotNumber = (UINT8)Strtoi (SlotNumberStr);
return (EFI_DEVICE_PATH_PROTOCOL *)Emmc;
@@ -1782,6 +1907,10 @@ DevPathFromTextDebugPort (
(UINT16)sizeof (VENDOR_DEVICE_PATH)
);
+ if (Vend == NULL) {
+ return NULL;
+ }
+
CopyGuid (&Vend->Guid, &gEfiDebugPortProtocolGuid);
return (EFI_DEVICE_PATH_PROTOCOL *)Vend;
@@ -1813,6 +1942,10 @@ DevPathFromTextMAC (
(UINT16)sizeof (MAC_ADDR_DEVICE_PATH)
);
+ if (MACDevPath == NULL) {
+ return NULL;
+ }
+
MACDevPath->IfType = (UINT8)Strtoi (IfTypeStr);
Length = sizeof (EFI_MAC_ADDRESS);
@@ -1882,6 +2015,10 @@ DevPathFromTextIPv4 (
(UINT16)sizeof (IPv4_DEVICE_PATH)
);
+ if (IPv4 == NULL) {
+ return NULL;
+ }
+
StrToIpv4Address (RemoteIPStr, NULL, &IPv4->RemoteIpAddress, NULL);
IPv4->Protocol = (UINT16)NetworkProtocolFromText (ProtocolStr);
if (StrCmp (TypeStr, L"Static") == 0) {
@@ -1938,6 +2075,10 @@ DevPathFromTextIPv6 (
(UINT16)sizeof (IPv6_DEVICE_PATH)
);
+ if (IPv6 == NULL) {
+ return NULL;
+ }
+
StrToIpv6Address (RemoteIPStr, NULL, &IPv6->RemoteIpAddress, NULL);
IPv6->Protocol = (UINT16)NetworkProtocolFromText (ProtocolStr);
if (StrCmp (TypeStr, L"Static") == 0) {
@@ -1992,6 +2133,10 @@ DevPathFromTextUart (
(UINT16)sizeof (UART_DEVICE_PATH)
);
+ if (Uart == NULL) {
+ return NULL;
+ }
+
if (StrCmp (BaudStr, L"DEFAULT") == 0) {
Uart->BaudRate = 115200;
} else {
@@ -2072,6 +2217,10 @@ ConvertFromTextUsbClass (
(UINT16)sizeof (USB_CLASS_DEVICE_PATH)
);
+ if (UsbClass == NULL) {
+ return NULL;
+ }
+
VIDStr = GetNextParamStr (&TextDeviceNode);
PIDStr = GetNextParamStr (&TextDeviceNode);
if (UsbClassText->ClassExist) {
@@ -2513,6 +2662,11 @@ DevPathFromTextUsbWwid (
MSG_USB_WWID_DP,
(UINT16)(sizeof (USB_WWID_DEVICE_PATH) +
SerialNumberStrLen * sizeof (CHAR16))
);
+
+ if (UsbWwid == NULL) {
+ return NULL;
+ }
+
UsbWwid->VendorId = (UINT16)Strtoi (VIDStr);
UsbWwid->ProductId = (UINT16)Strtoi (PIDStr);
UsbWwid->InterfaceNumber = (UINT16)Strtoi (InterfaceNumStr);
@@ -2553,6 +2707,10 @@ DevPathFromTextUnit (
(UINT16)sizeof
(DEVICE_LOGICAL_UNIT_DEVICE_PATH)
);
+ if (LogicalUnit == NULL) {
+ return NULL;
+ }
+
LogicalUnit->Lun = (UINT8)Strtoi (LunStr);
return (EFI_DEVICE_PATH_PROTOCOL *)LogicalUnit;
@@ -2596,6 +2754,10 @@ DevPathFromTextiSCSI (
(UINT16)(sizeof
(ISCSI_DEVICE_PATH_WITH_NAME) + StrLen (NameStr))
);
+ if (ISCSIDevPath == NULL) {
+ return NULL;
+ }
+
AsciiStr = ISCSIDevPath->TargetName;
StrToAscii (NameStr, &AsciiStr);
@@ -2657,6 +2819,10 @@ DevPathFromTextVlan (
(UINT16)sizeof (VLAN_DEVICE_PATH)
);
+ if (Vlan == NULL) {
+ return NULL;
+ }
+
Vlan->VlanId = (UINT16)Strtoi (VlanStr);
return (EFI_DEVICE_PATH_PROTOCOL *)Vlan;
@@ -2684,6 +2850,11 @@ DevPathFromTextBluetooth (
MSG_BLUETOOTH_DP,
(UINT16)sizeof
(BLUETOOTH_DEVICE_PATH)
);
+
+ if (BluetoothDp == NULL) {
+ return NULL;
+ }
+
StrHexToBytes (
BluetoothStr,
sizeof (BLUETOOTH_ADDRESS) * 2,
@@ -2718,6 +2889,10 @@ DevPathFromTextWiFi (
(UINT16)sizeof (WIFI_DEVICE_PATH)
);
+ if (WiFiDp == NULL) {
+ return NULL;
+ }
+
if (NULL != SSIdStr) {
DataLen = StrLen (SSIdStr);
if (StrLen (SSIdStr) > 32) {
@@ -2757,6 +2932,10 @@ DevPathFromTextBluetoothLE (
(UINT16)sizeof
(BLUETOOTH_LE_DEVICE_PATH)
);
+ if (BluetoothLeDp == NULL) {
+ return NULL;
+ }
+
BluetoothLeDp->Address.Type = (UINT8)Strtoi (BluetoothLeAddrTypeStr);
StrHexToBytes (
BluetoothLeAddrStr,
@@ -2883,6 +3062,10 @@ DevPathFromTextUri (
(UINT16)(sizeof (URI_DEVICE_PATH) +
UriLength)
);
+ if (Uri == NULL) {
+ return NULL;
+ }
+
while (UriLength-- != 0) {
Uri->Uri[UriLength] = (CHAR8)UriStr[UriLength];
}
@@ -2938,6 +3121,10 @@ DevPathFromTextHD (
(UINT16)sizeof
(HARDDRIVE_DEVICE_PATH)
);
+ if (Hd == NULL) {
+ return NULL;
+ }
+
Hd->PartitionNumber = (UINT32)Strtoi (PartitionStr);
ZeroMem (Hd->Signature, 16);
@@ -2991,6 +3178,10 @@ DevPathFromTextCDROM (
(UINT16)sizeof (CDROM_DEVICE_PATH)
);
+ if (CDROMDevPath == NULL) {
+ return NULL;
+ }
+
CDROMDevPath->BootEntry = (UINT32)Strtoi (EntryStr);
Strtoi64 (StartStr, &CDROMDevPath->PartitionStart);
Strtoi64 (SizeStr, &CDROMDevPath->PartitionSize);
@@ -3039,6 +3230,10 @@ DevPathFromTextFilePath (
(UINT16)(sizeof (FILEPATH_DEVICE_PATH) +
StrLen (TextDeviceNode) * 2)
);
+ if (File == NULL) {
+ return NULL;
+ }
+
StrCpyS (File->PathName, StrLen (TextDeviceNode) + 1, TextDeviceNode);
return (EFI_DEVICE_PATH_PROTOCOL *)File;
@@ -3067,6 +3262,10 @@ DevPathFromTextMedia (
(UINT16)sizeof
(MEDIA_PROTOCOL_DEVICE_PATH)
);
+ if (Media == NULL) {
+ return NULL;
+ }
+
StrToGuid (GuidStr, &Media->Protocol);
return (EFI_DEVICE_PATH_PROTOCOL *)Media;
@@ -3095,6 +3294,10 @@ DevPathFromTextFv (
(UINT16)sizeof
(MEDIA_FW_VOL_DEVICE_PATH)
);
+ if (Fv == NULL) {
+ return NULL;
+ }
+
StrToGuid (GuidStr, &Fv->FvName);
return (EFI_DEVICE_PATH_PROTOCOL *)Fv;
@@ -3123,6 +3326,10 @@ DevPathFromTextFvFile (
(UINT16)sizeof
(MEDIA_FW_VOL_FILEPATH_DEVICE_PATH)
);
+ if (FvFile == NULL) {
+ return NULL;
+ }
+
StrToGuid (GuidStr, &FvFile->FvFileName);
return (EFI_DEVICE_PATH_PROTOCOL *)FvFile;
@@ -3153,6 +3360,10 @@ DevPathFromTextRelativeOffsetRange (
(UINT16)sizeof (MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH)
);
+ if (Offset == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingOffsetStr, &Offset->StartingOffset);
Strtoi64 (EndingOffsetStr, &Offset->EndingOffset);
@@ -3190,6 +3401,10 @@ DevPathFromTextRamDisk (
(UINT16)sizeof
(MEDIA_RAM_DISK_DEVICE_PATH)
);
+ if (RamDisk == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingAddrStr, &StartingAddr);
WriteUnaligned64 ((UINT64 *)&(RamDisk->StartingAddr[0]), StartingAddr);
Strtoi64 (EndingAddrStr, &EndingAddr);
@@ -3230,6 +3445,10 @@ DevPathFromTextVirtualDisk (
(UINT16)sizeof
(MEDIA_RAM_DISK_DEVICE_PATH)
);
+ if (RamDisk == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingAddrStr, &StartingAddr);
WriteUnaligned64 ((UINT64 *)&(RamDisk->StartingAddr[0]), StartingAddr);
Strtoi64 (EndingAddrStr, &EndingAddr);
@@ -3270,6 +3489,10 @@ DevPathFromTextVirtualCd (
(UINT16)sizeof
(MEDIA_RAM_DISK_DEVICE_PATH)
);
+ if (RamDisk == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingAddrStr, &StartingAddr);
WriteUnaligned64 ((UINT64 *)&(RamDisk->StartingAddr[0]), StartingAddr);
Strtoi64 (EndingAddrStr, &EndingAddr);
@@ -3310,6 +3533,10 @@ DevPathFromTextPersistentVirtualDisk (
(UINT16)sizeof
(MEDIA_RAM_DISK_DEVICE_PATH)
);
+ if (RamDisk == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingAddrStr, &StartingAddr);
WriteUnaligned64 ((UINT64 *)&(RamDisk->StartingAddr[0]), StartingAddr);
Strtoi64 (EndingAddrStr, &EndingAddr);
@@ -3350,6 +3577,10 @@ DevPathFromTextPersistentVirtualCd (
(UINT16)sizeof
(MEDIA_RAM_DISK_DEVICE_PATH)
);
+ if (RamDisk == NULL) {
+ return NULL;
+ }
+
Strtoi64 (StartingAddrStr, &StartingAddr);
WriteUnaligned64 ((UINT64 *)&(RamDisk->StartingAddr[0]), StartingAddr);
Strtoi64 (EndingAddrStr, &EndingAddr);
@@ -3404,6 +3635,10 @@ DevPathFromTextBBS (
(UINT16)(sizeof (BBS_BBS_DEVICE_PATH) +
StrLen (IdStr))
);
+ if (Bbs == NULL) {
+ return NULL;
+ }
+
if (StrCmp (TypeStr, L"Floppy") == 0) {
Bbs->DeviceType = BBS_TYPE_FLOPPY;
} else if (StrCmp (TypeStr, L"HD") == 0) {
@@ -3455,6 +3690,11 @@ DevPathFromTextSata (
MSG_SATA_DP,
(UINT16)sizeof (SATA_DEVICE_PATH)
);
+
+ if (Sata == NULL) {
+ return NULL;
+ }
+
Sata->HBAPortNumber = (UINT16)Strtoi (Param1);
//
--
2.20.1.windows.1
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