From 06b4573598f803d37b4b95c1c8c2ca69fc03ea3a Mon Sep 17 00:00:00 2001
From: Hao Wu <hao.a.wu@intel.com>
Date: Tue, 11 Oct 2016 10:20:14 +0800
Subject: [PATCH] BaseTools/GenFw: Avoid possible NULL pointer dereference

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
---
 BaseTools/Source/C/GenFw/Elf32Convert.c |  8 ++++++++
 BaseTools/Source/C/GenFw/Elf64Convert.c | 10 +++++++++-
 BaseTools/Source/C/GenFw/ElfConvert.c   |  7 ++++++-
 BaseTools/Source/C/GenFw/GenFw.c        | 18 ++++++++++++++++--
 4 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/BaseTools/Source/C/GenFw/Elf32Convert.c b/BaseTools/Source/C/GenFw/Elf32Convert.c
index 8fca7fba2a..f420bc89da 100644
--- a/BaseTools/Source/C/GenFw/Elf32Convert.c
+++ b/BaseTools/Source/C/GenFw/Elf32Convert.c
@@ -167,6 +167,10 @@ InitializeElf32 (
   // Create COFF Section offset buffer and zero.
   //
   mCoffSectionsOffset = (UINT32 *)malloc(mEhdr->e_shnum * sizeof (UINT32));
+  if (mCoffSectionsOffset == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+    return FALSE;
+  }
   memset(mCoffSectionsOffset, 0, mEhdr->e_shnum * sizeof(UINT32));
 
   //
@@ -526,6 +530,10 @@ ScanSections32 (
   // Allocate base Coff file.  Will be expanded later for relocations.
   //
   mCoffFile = (UINT8 *)malloc(mCoffOffset);
+  if (mCoffFile == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+  }
+  assert (mCoffFile != NULL);
   memset(mCoffFile, 0, mCoffOffset);
 
   //
diff --git a/BaseTools/Source/C/GenFw/Elf64Convert.c b/BaseTools/Source/C/GenFw/Elf64Convert.c
index 9b409b615e..acf021667e 100644
--- a/BaseTools/Source/C/GenFw/Elf64Convert.c
+++ b/BaseTools/Source/C/GenFw/Elf64Convert.c
@@ -1,7 +1,7 @@
 /** @file
 Elf64 convert solution
 
-Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
 Portions copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
 
 This program and the accompanying materials are licensed and made available
@@ -172,6 +172,10 @@ InitializeElf64 (
   //
   VerboseMsg ("Create COFF Section Offset Buffer");
   mCoffSectionsOffset = (UINT32 *)malloc(mEhdr->e_shnum * sizeof (UINT32));
+  if (mCoffSectionsOffset == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+    return FALSE;
+  }
   memset(mCoffSectionsOffset, 0, mEhdr->e_shnum * sizeof(UINT32));
 
   //
@@ -518,6 +522,10 @@ ScanSections64 (
   // Allocate base Coff file.  Will be expanded later for relocations.
   //
   mCoffFile = (UINT8 *)malloc(mCoffOffset);
+  if (mCoffFile == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+  }
+  assert (mCoffFile != NULL);
   memset(mCoffFile, 0, mCoffOffset);
 
   //
diff --git a/BaseTools/Source/C/GenFw/ElfConvert.c b/BaseTools/Source/C/GenFw/ElfConvert.c
index 6211389ba1..17913ff2df 100644
--- a/BaseTools/Source/C/GenFw/ElfConvert.c
+++ b/BaseTools/Source/C/GenFw/ElfConvert.c
@@ -1,7 +1,7 @@
 /** @file
 Elf convert solution
 
-Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
 
 This program and the accompanying materials are licensed and made available 
 under the terms and conditions of the BSD License which accompanies this 
@@ -24,6 +24,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <string.h>
 #include <time.h>
 #include <ctype.h>
+#include <assert.h>
 
 #include <Common/UefiBaseTypes.h>
 #include <IndustryStandard/PeImage.h>
@@ -98,6 +99,10 @@ CoffAddFixup(
       mCoffFile,
       mCoffOffset + sizeof(EFI_IMAGE_BASE_RELOCATION) + 2 * MAX_COFF_ALIGNMENT
       );
+    if (mCoffFile == NULL) {
+      Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+    }
+    assert (mCoffFile != NULL);
     memset (
       mCoffFile + mCoffOffset, 0,
       sizeof(EFI_IMAGE_BASE_RELOCATION) + 2 * MAX_COFF_ALIGNMENT
diff --git a/BaseTools/Source/C/GenFw/GenFw.c b/BaseTools/Source/C/GenFw/GenFw.c
index b62756a492..9ffc4c5b01 100644
--- a/BaseTools/Source/C/GenFw/GenFw.c
+++ b/BaseTools/Source/C/GenFw/GenFw.c
@@ -625,6 +625,10 @@ PeCoffConvertImageToXip (
   // Allocate the extra space that we need to grow the image
   //
   XipFile = malloc (XipLength);
+  if (XipFile == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+    return;
+  }
   memset (XipFile, 0, XipLength);
 
   //
@@ -701,6 +705,10 @@ Returns:
                           + 3 * (sizeof (UINT16) + 3 * sizeof (CHAR16)) 
                           + sizeof (EFI_IMAGE_RESOURCE_DATA_ENTRY);
   HiiSectionHeader = malloc (HiiSectionHeaderSize);
+  if (HiiSectionHeader == NULL) {
+    Error (NULL, 0, 4001, "Resource", "memory cannot be allocated!");
+    return NULL;
+  }
   memset (HiiSectionHeader, 0, HiiSectionHeaderSize);
 
   HiiSectionOffset = 0;
@@ -1693,6 +1701,10 @@ Returns:
       // Create the resource section header
       //
       HiiSectionHeader = CreateHiiResouceSectionHeader (&HiiSectionHeaderSize, HiiPackageListHeader.PackageLength);
+      if (HiiSectionHeader == NULL) {
+        free (HiiPackageListBuffer);
+        goto Finish;
+      }
       //
       // Wrtie section header and HiiData into File.
       //
@@ -3028,8 +3040,10 @@ Returns:
   }
 
   ptime = localtime (&newtime);
-  DebugMsg (NULL, 0, 9, "New Image Time Stamp", "%04d-%02d-%02d %02d:%02d:%02d",
-            ptime->tm_year + 1900, ptime->tm_mon + 1, ptime->tm_mday, ptime->tm_hour, ptime->tm_min, ptime->tm_sec);
+  if (ptime != NULL) {
+    DebugMsg (NULL, 0, 9, "New Image Time Stamp", "%04d-%02d-%02d %02d:%02d:%02d",
+              ptime->tm_year + 1900, ptime->tm_mon + 1, ptime->tm_mday, ptime->tm_hour, ptime->tm_min, ptime->tm_sec);
+  }
   //
   // Set new time and data into PeImage.
   //