File ovmf-bsc1131361-fix-stack-overflow-xhci.patch of Package ovmf

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File ovmf-bsc1131361-fix-stack-overflow-xhci.patch of Package ovmf

From 290e33c37b057b2b22b46807f229158a9501fa55 Mon Sep 17 00:00:00 2001
From: Star Zeng <star.zeng@intel.com>
Date: Mon, 25 Jun 2018 16:50:01 +0800
Subject: [PATCH 1/2] MdeModulePkg UsbBusPei: Fix wrong buffer length used to
 read hub desc

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=973

Bug 973 just mentions UsbBusDxe, but UsbBusPei has similar issue.

HUB descriptor has variable length.
But the code uses stack (HubDescriptor in PeiDoHubConfig) with fixed
length sizeof(EFI_USB_HUB_DESCRIPTOR) to hold HUB descriptor data.
It uses hard code length value (12) for SuperSpeed path.
And it uses HubDesc->Length for none SuperSpeed path, then there will
be stack overflow when HubDesc->Length is greater than
sizeof(EFI_USB_HUB_DESCRIPTOR).

The patch updates the code to use a big enough buffer to hold the
descriptor data.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Bret Barkelew <bret.barkelew@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>
(cherry picked from commit 72750e3bf9174f15c17e78f0f117b5e7311bb49f)
---
 MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.c | 108 ++++++++---------------
 MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.h | 4 +-
 2 files changed, 38 insertions(+), 74 deletions(-)

diff --git a/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.c b/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.c
index 16a7b589c1c2..ac930ee8ea00 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.c
@@ -1,7 +1,7 @@
 /** @file
 Usb Hub Request Support In PEI Phase
 
-Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved. 
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved. 
 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions
@@ -276,9 +276,10 @@ PeiHubClearHubFeature (
 }
 
 /**
- Get a given hub descriptor.
+ Get a given (SuperSpeed) hub descriptor.
 
 @param PeiServices General-purpose services that are available to every PEIM.
+ @param PeiUsbDevice Indicates the hub controller device.
 @param UsbIoPpi Indicates the PEI_USB_IO_PPI instance.
 @param DescriptorSize The length of Hub Descriptor buffer.
 @param HubDescriptor Caller allocated buffer to store the hub descriptor if
@@ -292,21 +293,28 @@ PeiHubClearHubFeature (
 EFI_STATUS
 PeiGetHubDescriptor (
 IN EFI_PEI_SERVICES **PeiServices,
+ IN PEI_USB_DEVICE *PeiUsbDevice,
 IN PEI_USB_IO_PPI *UsbIoPpi,
 IN UINTN DescriptorSize,
 OUT EFI_USB_HUB_DESCRIPTOR *HubDescriptor
 )
 {
 EFI_USB_DEVICE_REQUEST DevReq;
+ UINT8 DescType;
+
 ZeroMem (&DevReq, sizeof (EFI_USB_DEVICE_REQUEST));
 
+ DescType = (PeiUsbDevice->DeviceSpeed == EFI_USB_SPEED_SUPER) ?
+ USB_DT_SUPERSPEED_HUB :
+ USB_DT_HUB;
+
 //
 // Fill Device request packet
 //
 DevReq.RequestType = USB_RT_HUB | 0x80;
 DevReq.Request = USB_HUB_GET_DESCRIPTOR;
- DevReq.Value = USB_DT_HUB << 8;
- DevReq.Length = (UINT16)DescriptorSize;
+ DevReq.Value = (UINT16) (DescType << 8);
+ DevReq.Length = (UINT16) DescriptorSize;
 
 return UsbIoPpi->UsbControlTransfer (
 PeiServices,
@@ -319,48 +327,6 @@ PeiGetHubDescriptor (
 );
 }
 
-/**
- Get a given SuperSpeed hub descriptor.
-
- @param PeiServices General-purpose services that are available to every PEIM.
- @param UsbIoPpi Indicates the PEI_USB_IO_PPI instance.
- @param HubDescriptor Caller allocated buffer to store the hub descriptor if
- successfully returned.
-
- @retval EFI_SUCCESS Hub descriptor is obtained successfully.
- @retval EFI_DEVICE_ERROR Cannot get the hub descriptor due to a hardware error.
- @retval Others Other failure occurs.
-
-**/
-EFI_STATUS
-PeiGetSuperSpeedHubDesc (
- IN EFI_PEI_SERVICES **PeiServices,
- IN PEI_USB_IO_PPI *UsbIoPpi,
- OUT EFI_USB_HUB_DESCRIPTOR *HubDescriptor
- )
-{
- EFI_USB_DEVICE_REQUEST DevReq;
- ZeroMem (&DevReq, sizeof (EFI_USB_DEVICE_REQUEST));
-
- //
- // Fill Device request packet
- //
- DevReq.RequestType = USB_RT_HUB | 0x80;
- DevReq.Request = USB_HUB_GET_DESCRIPTOR;
- DevReq.Value = USB_DT_SUPERSPEED_HUB << 8;
- DevReq.Length = 12;
-
- return UsbIoPpi->UsbControlTransfer (
- PeiServices,
- UsbIoPpi,
- &DevReq,
- EfiUsbDataIn,
- PcdGet32 (PcdUsbTransferTimeoutValue),
- HubDescriptor,
- 12
- );
-}
-
 /**
 Read the whole usb hub descriptor. It is necessary
 to do it in two steps because hub descriptor is of
@@ -387,29 +353,19 @@ PeiUsbHubReadDesc (
 {
 EFI_STATUS Status;
 
- if (PeiUsbDevice->DeviceSpeed == EFI_USB_SPEED_SUPER) {
- //
- // Get the super speed hub descriptor
- //
- Status = PeiGetSuperSpeedHubDesc (PeiServices, UsbIoPpi, HubDescriptor);
- } else {
+ //
+ // First get the hub descriptor length
+ //
+ Status = PeiGetHubDescriptor (PeiServices, PeiUsbDevice, UsbIoPpi, 2, HubDescriptor);
 
- //
- // First get the hub descriptor length
- //
- Status = PeiGetHubDescriptor (PeiServices, UsbIoPpi, 2, HubDescriptor);
-
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Get the whole hub descriptor
- //
- Status = PeiGetHubDescriptor (PeiServices, UsbIoPpi, HubDescriptor->Length, HubDescriptor);
+ if (EFI_ERROR (Status)) {
+ return Status;
 }
 
- return Status;
+ //
+ // Get the whole hub descriptor
+ //
+ return PeiGetHubDescriptor (PeiServices, PeiUsbDevice, UsbIoPpi, HubDescriptor->Length, HubDescriptor);
 }
 
 /**
@@ -468,15 +424,21 @@ PeiDoHubConfig (
 IN PEI_USB_DEVICE *PeiUsbDevice
 )
 {
- EFI_USB_HUB_DESCRIPTOR HubDescriptor;
+ UINT8 HubDescBuffer[256];
+ EFI_USB_HUB_DESCRIPTOR *HubDescriptor;
 EFI_STATUS Status;
 EFI_USB_HUB_STATUS HubStatus;
 UINTN Index;
 PEI_USB_IO_PPI *UsbIoPpi;
 
- ZeroMem (&HubDescriptor, sizeof (HubDescriptor));
 UsbIoPpi = &PeiUsbDevice->UsbIoPpi;
 
+ //
+ // The length field of descriptor is UINT8 type, so the buffer
+ // with 256 bytes is enough to hold the descriptor data.
+ //
+ HubDescriptor = (EFI_USB_HUB_DESCRIPTOR *) HubDescBuffer;
+
 //
 // Get the hub descriptor 
 //
@@ -484,13 +446,13 @@ PeiDoHubConfig (
 PeiServices,
 PeiUsbDevice,
 UsbIoPpi,
- &HubDescriptor
+ HubDescriptor
 );
 if (EFI_ERROR (Status)) {
 return EFI_DEVICE_ERROR;
 }
 
- PeiUsbDevice->DownStreamPortNo = HubDescriptor.NbrPorts;
+ PeiUsbDevice->DownStreamPortNo = HubDescriptor->NbrPorts;
 
 if (PeiUsbDevice->DeviceSpeed == EFI_USB_SPEED_SUPER) {
 DEBUG ((EFI_D_INFO, "PeiDoHubConfig: Set Hub Depth as 0x%x\n", PeiUsbDevice->Tier));
@@ -516,9 +478,9 @@ PeiDoHubConfig (
 }
 }
 
- DEBUG (( EFI_D_INFO, "PeiDoHubConfig: HubDescriptor.PwrOn2PwrGood: 0x%x\n", HubDescriptor.PwrOn2PwrGood));
- if (HubDescriptor.PwrOn2PwrGood > 0) {
- MicroSecondDelay (HubDescriptor.PwrOn2PwrGood * USB_SET_PORT_POWER_STALL);
+ DEBUG (( EFI_D_INFO, "PeiDoHubConfig: HubDescriptor.PwrOn2PwrGood: 0x%x\n", HubDescriptor->PwrOn2PwrGood));
+ if (HubDescriptor->PwrOn2PwrGood > 0) {
+ MicroSecondDelay (HubDescriptor->PwrOn2PwrGood * USB_SET_PORT_POWER_STALL);
 }
 
 //
diff --git a/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.h b/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.h
index f50bc6350156..341f6f32e3d0 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.h
+++ b/MdeModulePkg/Bus/Usb/UsbBusPei/HubPeim.h
@@ -1,7 +1,7 @@
 /** @file
 Constants definitions for Usb Hub Peim
 
-Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved. 
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved. 
 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions
@@ -227,6 +227,7 @@ PeiHubClearHubFeature (
 Get a given hub descriptor.
 
 @param PeiServices General-purpose services that are available to every PEIM.
+ @param PeiUsbDevice Indicates the hub controller device.
 @param UsbIoPpi Indicates the PEI_USB_IO_PPI instance.
 @param DescriptorSize The length of Hub Descriptor buffer.
 @param HubDescriptor Caller allocated buffer to store the hub descriptor if
@@ -240,6 +241,7 @@ PeiHubClearHubFeature (
 EFI_STATUS
 PeiGetHubDescriptor (
 IN EFI_PEI_SERVICES **PeiServices,
+ IN PEI_USB_DEVICE *PeiUsbDevice,
 IN PEI_USB_IO_PPI *UsbIoPpi,
 IN UINTN DescriptorSize,
 OUT EFI_USB_HUB_DESCRIPTOR *HubDescriptor
-- 
2.21.0

From 08642ce465f31cf22e0f7cf2a9750a6384e1f055 Mon Sep 17 00:00:00 2001
From: Star Zeng <star.zeng@intel.com>
Date: Mon, 25 Jun 2018 16:44:33 +0800
Subject: [PATCH 2/2] MdeModulePkg UsbBusDxe: Fix wrong buffer length used to
 read hub desc

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=973

HUB descriptor has variable length.
But the code uses stack (HubDesc in UsbHubInit) with fixed length
sizeof(EFI_USB_HUB_DESCRIPTOR) to hold HUB descriptor data.
It uses hard code length value (32 that is greater than
sizeof(EFI_USB_HUB_DESCRIPTOR)) for SuperSpeed path, then there will
be stack overflow when IOMMU is enabled because the Unmap operation
will copy the data from device buffer to host buffer.
And it uses HubDesc->Length for none SuperSpeed path, then there will
be stack overflow when HubDesc->Length is greater than
sizeof(EFI_USB_HUB_DESCRIPTOR).

The patch updates the code to use a big enough buffer to hold the
descriptor data.
The definition EFI_USB_SUPER_SPEED_HUB_DESCRIPTOR is wrong (HubDelay
field should be UINT16 type) and no code is using it, the patch
removes it.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Bret Barkelew <bret.barkelew@microsoft.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>
(cherry picked from commit acebdf14c985c5c9f50b37ece0b15ada87767359)
---
 MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c | 96 ++++++++-----------------
 MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h | 14 +---
 2 files changed, 32 insertions(+), 78 deletions(-)

diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
index fabb44157037..a962f76638e8 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
@@ -2,7 +2,7 @@
 
 Unified interface for RootHub and Hub.
 
-Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved. 
+Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved. 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution. The full text of the license may be found at
@@ -201,42 +201,7 @@ UsbHubCtrlClearTTBuffer (
 }
 
 /**
- Usb hub control transfer to get the super speed hub descriptor.
-
- @param HubDev The hub device.
- @param Buf The buffer to hold the descriptor.
-
- @retval EFI_SUCCESS The hub descriptor is retrieved.
- @retval Others Failed to retrieve the hub descriptor.
-
-**/
-EFI_STATUS
-UsbHubCtrlGetSuperSpeedHubDesc (
- IN USB_DEVICE *HubDev,
- OUT VOID *Buf
- )
-{
- EFI_STATUS Status;
- 
- Status = EFI_INVALID_PARAMETER;
- 
- Status = UsbCtrlRequest (
- HubDev,
- EfiUsbDataIn,
- USB_REQ_TYPE_CLASS,
- USB_HUB_TARGET_HUB,
- USB_HUB_REQ_GET_DESC,
- (UINT16) (USB_DESC_TYPE_HUB_SUPER_SPEED << 8),
- 0,
- Buf,
- 32
- );
-
- return Status;
-}
-
-/**
- Usb hub control transfer to get the hub descriptor.
+ Usb hub control transfer to get the (super speed) hub descriptor.
 
 @param HubDev The hub device.
 @param Buf The buffer to hold the descriptor.
@@ -254,6 +219,11 @@ UsbHubCtrlGetHubDesc (
 )
 {
 EFI_STATUS Status;
+ UINT8 DescType;
+
+ DescType = (HubDev->Speed == EFI_USB_SPEED_SUPER) ?
+ USB_DESC_TYPE_HUB_SUPER_SPEED :
+ USB_DESC_TYPE_HUB;
 
 Status = UsbCtrlRequest (
 HubDev,
@@ -261,7 +231,7 @@ UsbHubCtrlGetHubDesc (
 USB_REQ_TYPE_CLASS,
 USB_HUB_TARGET_HUB,
 USB_HUB_REQ_GET_DESC,
- (UINT16) (USB_DESC_TYPE_HUB << 8),
+ (UINT16) (DescType << 8),
 0,
 Buf,
 Len
@@ -475,29 +445,19 @@ UsbHubReadDesc (
 {
 EFI_STATUS Status;
 
- if (HubDev->Speed == EFI_USB_SPEED_SUPER) {
- //
- // Get the super speed hub descriptor
- //
- Status = UsbHubCtrlGetSuperSpeedHubDesc (HubDev, HubDesc);
- } else {
+ //
+ // First get the hub descriptor length
+ //
+ Status = UsbHubCtrlGetHubDesc (HubDev, HubDesc, 2);
 
- //
- // First get the hub descriptor length
- //
- Status = UsbHubCtrlGetHubDesc (HubDev, HubDesc, 2);
-
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // Get the whole hub descriptor
- //
- Status = UsbHubCtrlGetHubDesc (HubDev, HubDesc, HubDesc->Length);
+ if (EFI_ERROR (Status)) {
+ return Status;
 }
 
- return Status;
+ //
+ // Get the whole hub descriptor
+ //
+ return UsbHubCtrlGetHubDesc (HubDev, HubDesc, HubDesc->Length);
 }
 
 
@@ -690,7 +650,8 @@ UsbHubInit (
 IN USB_INTERFACE *HubIf
 )
 {
- EFI_USB_HUB_DESCRIPTOR HubDesc;
+ UINT8 HubDescBuffer[256];
+ EFI_USB_HUB_DESCRIPTOR *HubDesc;
 USB_ENDPOINT_DESC *EpDesc;
 USB_INTERFACE_SETTING *Setting;
 EFI_USB_IO_PROTOCOL *UsbIo;
@@ -725,14 +686,19 @@ UsbHubInit (
 return EFI_DEVICE_ERROR;
 }
 
- Status = UsbHubReadDesc (HubDev, &HubDesc);
+ //
+ // The length field of descriptor is UINT8 type, so the buffer
+ // with 256 bytes is enough to hold the descriptor data.
+ //
+ HubDesc = (EFI_USB_HUB_DESCRIPTOR *) HubDescBuffer;
+ Status = UsbHubReadDesc (HubDev, HubDesc);
 
 if (EFI_ERROR (Status)) {
 DEBUG (( EFI_D_ERROR, "UsbHubInit: failed to read HUB descriptor %r\n", Status));
 return Status;
 }
 
- HubIf->NumOfPort = HubDesc.NumPorts;
+ HubIf->NumOfPort = HubDesc->NumPorts;
 
 DEBUG (( EFI_D_INFO, "UsbHubInit: hub %d has %d ports\n", HubDev->Address,HubIf->NumOfPort));
 
@@ -751,7 +717,7 @@ UsbHubInit (
 DEBUG ((EFI_D_INFO, "UsbHubInit: Set Hub Depth as 0x%x\n", Depth));
 UsbHubCtrlSetHubDepth (HubIf->Device, Depth);
 
- for (Index = 0; Index < HubDesc.NumPorts; Index++) {
+ for (Index = 0; Index < HubDesc->NumPorts; Index++) {
 UsbHubCtrlSetPortFeature (HubIf->Device, Index, USB_HUB_PORT_REMOTE_WAKE_MASK);
 } 
 } else {
@@ -759,15 +725,15 @@ UsbHubInit (
 // Feed power to all the hub ports. It should be ok
 // for both gang/individual powered hubs.
 //
- for (Index = 0; Index < HubDesc.NumPorts; Index++) {
+ for (Index = 0; Index < HubDesc->NumPorts; Index++) {
 UsbHubCtrlSetPortFeature (HubIf->Device, Index, (EFI_USB_PORT_FEATURE) USB_HUB_PORT_POWER);
 }
 
 //
 // Update for the usb hub has no power on delay requirement
 //
- if (HubDesc.PwrOn2PwrGood > 0) {
- gBS->Stall (HubDesc.PwrOn2PwrGood * USB_SET_PORT_POWER_STALL);
+ if (HubDesc->PwrOn2PwrGood > 0) {
+ gBS->Stall (HubDesc->PwrOn2PwrGood * USB_SET_PORT_POWER_STALL);
 }
 UsbHubAckHubStatus (HubIf->Device);
 }
diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h
index 4e5fcd85e0af..fe9f1f74c751 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h
@@ -2,7 +2,7 @@
 
 The definition for USB hub.
 
-Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved. 
+Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved. 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution. The full text of the license may be found at
@@ -115,18 +115,6 @@ typedef struct {
 UINT8 Filler[16];
 } EFI_USB_HUB_DESCRIPTOR;
 
-typedef struct {
- UINT8 Length;
- UINT8 DescType;
- UINT8 NumPorts;
- UINT16 HubCharacter;
- UINT8 PwrOn2PwrGood;
- UINT8 HubContrCurrent;
- UINT8 HubHdrDecLat;
- UINT8 HubDelay;
- UINT8 DeviceRemovable;
-} EFI_USB_SUPER_SPEED_HUB_DESCRIPTOR;
-
 #pragma pack()
 
 
-- 
2.21.0

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