Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard
Got it, I will send out a V2 of the series according to the comments. Best Regards, Hao Wu > -Original Message- > From: Yao, Jiewen > Sent: Tuesday, March 06, 2018 9:11 PM > To: Yao, Jiewen; Zeng, Star; Wu, Hao A; edk2-devel@lists.01.org > Cc: Ni, Ruiyu; Dong, Eric > Subject: RE: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX > and Stack guard > > BTW: I don't think "StackBaseFound" is really needed. > > We can use ASSERT (StackBase != 0); directly. :-) > > Thank you > Yao Jiewen > > > -Original Message- > > From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Yao, > > Jiewen > > Sent: Tuesday, March 6, 2018 9:05 PM > > To: Zeng, Star ; Wu, Hao A ; > > edk2-devel@lists.01.org > > Cc: Ni, Ruiyu ; Dong, Eric > > Subject: Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict > > between NX and Stack guard > > > > Agree. > > > > With this update, reviewed-by: jiewen@intel.com > > > > > > > -Original Message- > > > From: Zeng, Star > > > Sent: Tuesday, March 6, 2018 8:16 PM > > > To: Wu, Hao A ; edk2-devel@lists.01.org > > > Cc: Wang, Jian J ; Dong, Eric > ; > > > Yao, Jiewen ; Ni, Ruiyu ; Zeng, > > Star > > > > > > Subject: RE: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between > > NX > > > and Stack guard > > > > > > A quick minor comment. > > > GetHobList() could be used instead of EfiGetSystemConfigurationTable > > > (&gEfiHobListGuid, &HobList). > > > > > > Thanks, > > > Star > > > -Original Message- > > > From: Wu, Hao A > > > Sent: Tuesday, March 6, 2018 8:11 PM > > > To: edk2-devel@lists.01.org > > > Cc: Wu, Hao A ; Wang, Jian J > ; > > > Zeng, Star ; Dong, Eric ; Yao, > > > Jiewen ; Ni, Ruiyu > > > Subject: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX > > and > > > Stack guard > > > > > > If enabled, NX memory protection feature will mark some types of active > > > memory as NX (non-executable), which includes the first page of the stack. > > > This will overwrite the attributes of the first page of the stack if the > > > stack > guard > > > feature is also enabled. > > > > > > The solution is to override the attributes setting to the first page of > > > the > stack by > > > adding back the 'EFI_MEMORY_RP' attribute when the stack guard feature > is > > > enabled. > > > > > > Cc: Jian J Wang > > > Cc: Star Zeng > > > Cc: Eric Dong > > > Cc: Jiewen Yao > > > Cc: Ruiyu Ni > > > Contributed-under: TianoCore Contribution Agreement 1.1 > > > Signed-off-by: Hao Wu > > > --- > > > MdeModulePkg/Core/Dxe/DxeMain.inf | 4 +- > > > MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 61 > > > +++ > > > 2 files changed, 64 insertions(+), 1 deletion(-) > > > > > > diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf > > > b/MdeModulePkg/Core/Dxe/DxeMain.inf > > > index 7334780326..d2e7360ed4 100644 > > > --- a/MdeModulePkg/Core/Dxe/DxeMain.inf > > > +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf > > > @@ -3,7 +3,7 @@ > > > # > > > # It provides an implementation of DXE Core that is compliant with DXE > CIS. > > > # > > > -# Copyright (c) 2006 - 2017, 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 of the BSD License # which > > > accompanies this distribution. The full text of the license may be found > > > at > > @@ > > > -130,6 +130,7 @@ > > >gEfiPropertiesTableGuid ## > > > SOMETIMES_PRODUCES ## SystemTable > > >gEfiMemoryAttributesTableGuid ## > > > SOMETIMES_PRODUCES ## SystemTable > > >gEfiEndOfDxeEventGroupGuid## > > > SOMETIMES_CONSUMES ## Event > > > + gEfiHobMemoryAllocStackGuid ## > > > SOMETIMES_CONSUMES ## SystemTable > > > > > > [Ppis] > > >gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB > > > @@ -198,6 +199,7 @@ >
Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard
BTW: I don't think "StackBaseFound" is really needed. We can use ASSERT (StackBase != 0); directly. :-) Thank you Yao Jiewen > -Original Message- > From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Yao, > Jiewen > Sent: Tuesday, March 6, 2018 9:05 PM > To: Zeng, Star ; Wu, Hao A ; > edk2-devel@lists.01.org > Cc: Ni, Ruiyu ; Dong, Eric > Subject: Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict > between NX and Stack guard > > Agree. > > With this update, reviewed-by: jiewen@intel.com > > > > -Original Message- > > From: Zeng, Star > > Sent: Tuesday, March 6, 2018 8:16 PM > > To: Wu, Hao A ; edk2-devel@lists.01.org > > Cc: Wang, Jian J ; Dong, Eric ; > > Yao, Jiewen ; Ni, Ruiyu ; Zeng, > Star > > > > Subject: RE: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between > NX > > and Stack guard > > > > A quick minor comment. > > GetHobList() could be used instead of EfiGetSystemConfigurationTable > > (&gEfiHobListGuid, &HobList). > > > > Thanks, > > Star > > -Original Message- > > From: Wu, Hao A > > Sent: Tuesday, March 6, 2018 8:11 PM > > To: edk2-devel@lists.01.org > > Cc: Wu, Hao A ; Wang, Jian J ; > > Zeng, Star ; Dong, Eric ; Yao, > > Jiewen ; Ni, Ruiyu > > Subject: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX > and > > Stack guard > > > > If enabled, NX memory protection feature will mark some types of active > > memory as NX (non-executable), which includes the first page of the stack. > > This will overwrite the attributes of the first page of the stack if the > > stack guard > > feature is also enabled. > > > > The solution is to override the attributes setting to the first page of the > > stack by > > adding back the 'EFI_MEMORY_RP' attribute when the stack guard feature is > > enabled. > > > > Cc: Jian J Wang > > Cc: Star Zeng > > Cc: Eric Dong > > Cc: Jiewen Yao > > Cc: Ruiyu Ni > > Contributed-under: TianoCore Contribution Agreement 1.1 > > Signed-off-by: Hao Wu > > --- > > MdeModulePkg/Core/Dxe/DxeMain.inf | 4 +- > > MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 61 > > +++ > > 2 files changed, 64 insertions(+), 1 deletion(-) > > > > diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf > > b/MdeModulePkg/Core/Dxe/DxeMain.inf > > index 7334780326..d2e7360ed4 100644 > > --- a/MdeModulePkg/Core/Dxe/DxeMain.inf > > +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf > > @@ -3,7 +3,7 @@ > > # > > # It provides an implementation of DXE Core that is compliant with DXE > > CIS. > > # > > -# Copyright (c) 2006 - 2017, 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 of the BSD License # which > > accompanies this distribution. The full text of the license may be found at > @@ > > -130,6 +130,7 @@ > >gEfiPropertiesTableGuid ## > > SOMETIMES_PRODUCES ## SystemTable > >gEfiMemoryAttributesTableGuid ## > > SOMETIMES_PRODUCES ## SystemTable > >gEfiEndOfDxeEventGroupGuid## > > SOMETIMES_CONSUMES ## Event > > + gEfiHobMemoryAllocStackGuid ## > > SOMETIMES_CONSUMES ## SystemTable > > > > [Ppis] > >gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB > > @@ -198,6 +199,7 @@ > >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType > > ## CONSUMES > >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType > > ## CONSUMES > >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask > > ## CONSUMES > > + gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard > > ## CONSUMES > > > > # [Hob] > > # RESOURCE_DESCRIPTOR ## CONSUMES > > diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > > b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > > index a2ea445eef..a6de22d3af 100644 > > --- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > > +++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > > @@ -801,6 +801,11 @@ InitializeDxeNxMemoryProtectionPolicy ( > >UINT64Attributes; > >LIST_ENTRY*Link; > >EFI_GCD_MAP_ENTRY *Entry; >
Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard
Agree. With this update, reviewed-by: jiewen@intel.com > -Original Message- > From: Zeng, Star > Sent: Tuesday, March 6, 2018 8:16 PM > To: Wu, Hao A ; edk2-devel@lists.01.org > Cc: Wang, Jian J ; Dong, Eric ; > Yao, Jiewen ; Ni, Ruiyu ; Zeng, Star > > Subject: RE: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX > and Stack guard > > A quick minor comment. > GetHobList() could be used instead of EfiGetSystemConfigurationTable > (&gEfiHobListGuid, &HobList). > > Thanks, > Star > -Original Message- > From: Wu, Hao A > Sent: Tuesday, March 6, 2018 8:11 PM > To: edk2-devel@lists.01.org > Cc: Wu, Hao A ; Wang, Jian J ; > Zeng, Star ; Dong, Eric ; Yao, > Jiewen ; Ni, Ruiyu > Subject: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and > Stack guard > > If enabled, NX memory protection feature will mark some types of active > memory as NX (non-executable), which includes the first page of the stack. > This will overwrite the attributes of the first page of the stack if the > stack guard > feature is also enabled. > > The solution is to override the attributes setting to the first page of the > stack by > adding back the 'EFI_MEMORY_RP' attribute when the stack guard feature is > enabled. > > Cc: Jian J Wang > Cc: Star Zeng > Cc: Eric Dong > Cc: Jiewen Yao > Cc: Ruiyu Ni > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Hao Wu > --- > MdeModulePkg/Core/Dxe/DxeMain.inf | 4 +- > MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 61 > +++ > 2 files changed, 64 insertions(+), 1 deletion(-) > > diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf > b/MdeModulePkg/Core/Dxe/DxeMain.inf > index 7334780326..d2e7360ed4 100644 > --- a/MdeModulePkg/Core/Dxe/DxeMain.inf > +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf > @@ -3,7 +3,7 @@ > # > # It provides an implementation of DXE Core that is compliant with DXE CIS. > # > -# Copyright (c) 2006 - 2017, 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 of the BSD License # which > accompanies this distribution. The full text of the license may be found at > @@ > -130,6 +130,7 @@ >gEfiPropertiesTableGuid ## > SOMETIMES_PRODUCES ## SystemTable >gEfiMemoryAttributesTableGuid ## > SOMETIMES_PRODUCES ## SystemTable >gEfiEndOfDxeEventGroupGuid## > SOMETIMES_CONSUMES ## Event > + gEfiHobMemoryAllocStackGuid ## > SOMETIMES_CONSUMES ## SystemTable > > [Ppis] >gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB > @@ -198,6 +199,7 @@ >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType > ## CONSUMES >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType > ## CONSUMES >gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask > ## CONSUMES > + gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard > ## CONSUMES > > # [Hob] > # RESOURCE_DESCRIPTOR ## CONSUMES > diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > index a2ea445eef..a6de22d3af 100644 > --- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > +++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c > @@ -801,6 +801,11 @@ InitializeDxeNxMemoryProtectionPolicy ( >UINT64Attributes; >LIST_ENTRY*Link; >EFI_GCD_MAP_ENTRY *Entry; > + VOID *HobList; > + EFI_PEI_HOB_POINTERS Hob; > + EFI_HOB_MEMORY_ALLOCATION *MemoryHob; > + EFI_PHYSICAL_ADDRESS StackBase; > + BOOLEAN StackBaseFound; > >// >// Get the EFI memory map. > @@ -832,6 +837,45 @@ InitializeDxeNxMemoryProtectionPolicy ( >} while (Status == EFI_BUFFER_TOO_SMALL); >ASSERT_EFI_ERROR (Status); > > + StackBase = 0; > + StackBaseFound = FALSE; > + if (PcdGetBool (PcdCpuStackGuard)) { > +// > +// Get the base of stack from Hob. > +// > +Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, &HobList); > +if (!EFI_ERROR (Status)) { > + for (Hob.Raw = HobList; !END_OF_HOB_LIST (Hob); Hob.Raw = > GET_NEXT_HOB (Hob)) { > +if (GET_HOB_TYPE(Hob) == EFI_HOB_TYPE_MEMORY_ALLOCATION) > { > + MemoryHob = Hob.MemoryAllocation; > + if (CompareGuid(&gEfiHobMemoryAllocStackGuid, > &MemoryHob->AllocDescriptor.Name)) { > +DEBUG (( > + DEBUG_INFO, > + "%a: StackBase = 0x%016lx StackSize = 0x%016lx\n", > + __FUNCTION__, > + MemoryHob->AllocDescriptor.MemoryBaseAddress, > + MemoryHob->AllocDescriptor.MemoryLength > + )); > + > +StackBase = MemoryHob->AllocDescriptor.MemoryBaseAddres
Re: [edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard
A quick minor comment. GetHobList() could be used instead of EfiGetSystemConfigurationTable (&gEfiHobListGuid, &HobList). Thanks, Star -Original Message- From: Wu, Hao A Sent: Tuesday, March 6, 2018 8:11 PM To: edk2-devel@lists.01.org Cc: Wu, Hao A ; Wang, Jian J ; Zeng, Star ; Dong, Eric ; Yao, Jiewen ; Ni, Ruiyu Subject: [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard If enabled, NX memory protection feature will mark some types of active memory as NX (non-executable), which includes the first page of the stack. This will overwrite the attributes of the first page of the stack if the stack guard feature is also enabled. The solution is to override the attributes setting to the first page of the stack by adding back the 'EFI_MEMORY_RP' attribute when the stack guard feature is enabled. Cc: Jian J Wang Cc: Star Zeng Cc: Eric Dong Cc: Jiewen Yao Cc: Ruiyu Ni Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu --- MdeModulePkg/Core/Dxe/DxeMain.inf | 4 +- MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 61 +++ 2 files changed, 64 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf index 7334780326..d2e7360ed4 100644 --- a/MdeModulePkg/Core/Dxe/DxeMain.inf +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf @@ -3,7 +3,7 @@ # # It provides an implementation of DXE Core that is compliant with DXE CIS. # -# Copyright (c) 2006 - 2017, 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 of the BSD License # which accompanies this distribution. The full text of the license may be found at @@ -130,6 +130,7 @@ gEfiPropertiesTableGuid ## SOMETIMES_PRODUCES ## SystemTable gEfiMemoryAttributesTableGuid ## SOMETIMES_PRODUCES ## SystemTable gEfiEndOfDxeEventGroupGuid## SOMETIMES_CONSUMES ## Event + gEfiHobMemoryAllocStackGuid ## SOMETIMES_CONSUMES ## SystemTable [Ppis] gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB @@ -198,6 +199,7 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES + gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES # [Hob] # RESOURCE_DESCRIPTOR ## CONSUMES diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c index a2ea445eef..a6de22d3af 100644 --- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c +++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c @@ -801,6 +801,11 @@ InitializeDxeNxMemoryProtectionPolicy ( UINT64Attributes; LIST_ENTRY*Link; EFI_GCD_MAP_ENTRY *Entry; + VOID *HobList; + EFI_PEI_HOB_POINTERS Hob; + EFI_HOB_MEMORY_ALLOCATION *MemoryHob; + EFI_PHYSICAL_ADDRESS StackBase; + BOOLEAN StackBaseFound; // // Get the EFI memory map. @@ -832,6 +837,45 @@ InitializeDxeNxMemoryProtectionPolicy ( } while (Status == EFI_BUFFER_TOO_SMALL); ASSERT_EFI_ERROR (Status); + StackBase = 0; + StackBaseFound = FALSE; + if (PcdGetBool (PcdCpuStackGuard)) { +// +// Get the base of stack from Hob. +// +Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, &HobList); +if (!EFI_ERROR (Status)) { + for (Hob.Raw = HobList; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) { +if (GET_HOB_TYPE(Hob) == EFI_HOB_TYPE_MEMORY_ALLOCATION) { + MemoryHob = Hob.MemoryAllocation; + if (CompareGuid(&gEfiHobMemoryAllocStackGuid, &MemoryHob->AllocDescriptor.Name)) { +DEBUG (( + DEBUG_INFO, + "%a: StackBase = 0x%016lx StackSize = 0x%016lx\n", + __FUNCTION__, + MemoryHob->AllocDescriptor.MemoryBaseAddress, + MemoryHob->AllocDescriptor.MemoryLength + )); + +StackBase = MemoryHob->AllocDescriptor.MemoryBaseAddress; +// +// Ensure the base of the stack is page-size aligned. +// +ASSERT ((StackBase & EFI_PAGE_MASK) == 0); +StackBaseFound = TRUE; +break; + } +} + } +} + +// +// Ensure the base of stack can be found from Hob when stack guard is +// enabled. +// +ASSERT (StackBaseFound); + } + DEBUG (( DEBUG_INFO, "%a: applying strict permissions to active memory regions\n", @@ -8
[edk2] [PATCH 2/2] MdeModulePkg/Core: Fix feature conflict between NX and Stack guard
If enabled, NX memory protection feature will mark some types of active memory as NX (non-executable), which includes the first page of the stack. This will overwrite the attributes of the first page of the stack if the stack guard feature is also enabled. The solution is to override the attributes setting to the first page of the stack by adding back the 'EFI_MEMORY_RP' attribute when the stack guard feature is enabled. Cc: Jian J Wang Cc: Star Zeng Cc: Eric Dong Cc: Jiewen Yao Cc: Ruiyu Ni Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu --- MdeModulePkg/Core/Dxe/DxeMain.inf | 4 +- MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 61 +++ 2 files changed, 64 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf index 7334780326..d2e7360ed4 100644 --- a/MdeModulePkg/Core/Dxe/DxeMain.inf +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf @@ -3,7 +3,7 @@ # # It provides an implementation of DXE Core that is compliant with DXE CIS. # -# Copyright (c) 2006 - 2017, 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 of the BSD License # which accompanies this distribution. The full text of the license may be found at @@ -130,6 +130,7 @@ gEfiPropertiesTableGuid ## SOMETIMES_PRODUCES ## SystemTable gEfiMemoryAttributesTableGuid ## SOMETIMES_PRODUCES ## SystemTable gEfiEndOfDxeEventGroupGuid## SOMETIMES_CONSUMES ## Event + gEfiHobMemoryAllocStackGuid ## SOMETIMES_CONSUMES ## SystemTable [Ppis] gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB @@ -198,6 +199,7 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES + gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES # [Hob] # RESOURCE_DESCRIPTOR ## CONSUMES diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c index a2ea445eef..a6de22d3af 100644 --- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c +++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c @@ -801,6 +801,11 @@ InitializeDxeNxMemoryProtectionPolicy ( UINT64Attributes; LIST_ENTRY*Link; EFI_GCD_MAP_ENTRY *Entry; + VOID *HobList; + EFI_PEI_HOB_POINTERS Hob; + EFI_HOB_MEMORY_ALLOCATION *MemoryHob; + EFI_PHYSICAL_ADDRESS StackBase; + BOOLEAN StackBaseFound; // // Get the EFI memory map. @@ -832,6 +837,45 @@ InitializeDxeNxMemoryProtectionPolicy ( } while (Status == EFI_BUFFER_TOO_SMALL); ASSERT_EFI_ERROR (Status); + StackBase = 0; + StackBaseFound = FALSE; + if (PcdGetBool (PcdCpuStackGuard)) { +// +// Get the base of stack from Hob. +// +Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, &HobList); +if (!EFI_ERROR (Status)) { + for (Hob.Raw = HobList; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) { +if (GET_HOB_TYPE(Hob) == EFI_HOB_TYPE_MEMORY_ALLOCATION) { + MemoryHob = Hob.MemoryAllocation; + if (CompareGuid(&gEfiHobMemoryAllocStackGuid, &MemoryHob->AllocDescriptor.Name)) { +DEBUG (( + DEBUG_INFO, + "%a: StackBase = 0x%016lx StackSize = 0x%016lx\n", + __FUNCTION__, + MemoryHob->AllocDescriptor.MemoryBaseAddress, + MemoryHob->AllocDescriptor.MemoryLength + )); + +StackBase = MemoryHob->AllocDescriptor.MemoryBaseAddress; +// +// Ensure the base of the stack is page-size aligned. +// +ASSERT ((StackBase & EFI_PAGE_MASK) == 0); +StackBaseFound = TRUE; +break; + } +} + } +} + +// +// Ensure the base of stack can be found from Hob when stack guard is +// enabled. +// +ASSERT (StackBaseFound); + } + DEBUG (( DEBUG_INFO, "%a: applying strict permissions to active memory regions\n", @@ -864,6 +908,23 @@ InitializeDxeNxMemoryProtectionPolicy ( EFI_PAGES_TO_SIZE (1), EFI_MEMORY_RP | Attributes); } + + if (StackBaseFound && + (StackBase >= MemoryMapEntry->PhysicalStart && + StackBase < MemoryMapEntry->PhysicalStart + +LShiftU64 (MemoryMapEntry->NumberOfPages, EFI_PAGE_SHIFT)) && + PcdGetBool (PcdCpuStackGuard)) { + +