MdeModulePkg/Core: Fix incorrect memory map generated in a rare case

[edk2] [PATCH] MdeModulePkg/Core: Fix incorrect memory map generated in a rare case

Posted by Jian J Wang 7 years ago

The root cause is that mImagePropertiesPrivateData.CodeSegmentCountMax was
not updated with correct value due to the fact that SortImageRecord() called
before might change the content of current ImageRecord. This will in turn
cause incorrect memory map entries generated in SplitTable().

Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
---
 MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c        | 4 ++--
 MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
index 75d9b14c1f..a84507df95 100644
--- a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
+++ b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
@@ -1229,12 +1229,12 @@ InsertImageRecord (
   InsertTailList (&mImagePropertiesPrivateData.ImageRecordList, &ImageRecord->Link);
   mImagePropertiesPrivateData.ImageRecordCount++;
 
-  SortImageRecord ();
-
   if (mImagePropertiesPrivateData.CodeSegmentCountMax < ImageRecord->CodeSegmentCount) {
     mImagePropertiesPrivateData.CodeSegmentCountMax = ImageRecord->CodeSegmentCount;
   }
 
+  SortImageRecord ();
+
 Finish:
   return ;
 }
diff --git a/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c b/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
index e3c505ef18..36ccf65fa3 100644
--- a/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
+++ b/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
@@ -1214,12 +1214,12 @@ SmmInsertImageRecord (
   InsertTailList (&mImagePropertiesPrivateData.ImageRecordList, &ImageRecord->Link);
   mImagePropertiesPrivateData.ImageRecordCount++;
 
-  SortImageRecord ();
-
   if (mImagePropertiesPrivateData.CodeSegmentCountMax < ImageRecord->CodeSegmentCount) {
     mImagePropertiesPrivateData.CodeSegmentCountMax = ImageRecord->CodeSegmentCount;
   }
 
+  SortImageRecord ();
+
 Finish:
   return ;
 }
-- 
2.15.1.windows.2

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Re: [edk2] [PATCH] MdeModulePkg/Core: Fix incorrect memory map generated in a rare case

Posted by Yao, Jiewen 7 years ago

Reviewed-by: Jiewen.yao@intel.com

> -----Original Message-----
> From: Wang, Jian J
> Sent: Monday, December 18, 2017 4:40 PM
> To: edk2-devel@lists.01.org
> Cc: Zeng, Star <star.zeng@intel.com>; Dong, Eric <eric.dong@intel.com>; Yao,
> Jiewen <jiewen.yao@intel.com>
> Subject: [PATCH] MdeModulePkg/Core: Fix incorrect memory map generated in
> a rare case
> 
> The root cause is that mImagePropertiesPrivateData.CodeSegmentCountMax
> was
> not updated with correct value due to the fact that SortImageRecord() called
> before might change the content of current ImageRecord. This will in turn
> cause incorrect memory map entries generated in SplitTable().
> 
> Cc: Star Zeng <star.zeng@intel.com>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
> ---
>  MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c        | 4 ++--
>  MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
> b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
> index 75d9b14c1f..a84507df95 100644
> --- a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
> +++ b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
> @@ -1229,12 +1229,12 @@ InsertImageRecord (
>    InsertTailList (&mImagePropertiesPrivateData.ImageRecordList,
> &ImageRecord->Link);
>    mImagePropertiesPrivateData.ImageRecordCount++;
> 
> -  SortImageRecord ();
> -
>    if (mImagePropertiesPrivateData.CodeSegmentCountMax <
> ImageRecord->CodeSegmentCount) {
>      mImagePropertiesPrivateData.CodeSegmentCountMax =
> ImageRecord->CodeSegmentCount;
>    }
> 
> +  SortImageRecord ();
> +
>  Finish:
>    return ;
>  }
> diff --git a/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
> b/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
> index e3c505ef18..36ccf65fa3 100644
> --- a/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
> +++ b/MdeModulePkg/Core/PiSmmCore/MemoryAttributesTable.c
> @@ -1214,12 +1214,12 @@ SmmInsertImageRecord (
>    InsertTailList (&mImagePropertiesPrivateData.ImageRecordList,
> &ImageRecord->Link);
>    mImagePropertiesPrivateData.ImageRecordCount++;
> 
> -  SortImageRecord ();
> -
>    if (mImagePropertiesPrivateData.CodeSegmentCountMax <
> ImageRecord->CodeSegmentCount) {
>      mImagePropertiesPrivateData.CodeSegmentCountMax =
> ImageRecord->CodeSegmentCount;
>    }
> 
> +  SortImageRecord ();
> +
>  Finish:
>    return ;
>  }
> --
> 2.15.1.windows.2

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