BaseTools/GenBootSector: Add/refine boundary checks for strcpy/strcat

[mirror_edk2.git] / BaseTools / Source / C / GenBootSector / GenBootSector.c

diff --git a/BaseTools/Source/C/GenBootSector/GenBootSector.c b/BaseTools/Source/C/GenBootSector/GenBootSector.c
index 213e1b9722ffc5379d36082ff1ac12b7bfeeef22..c02de49ba2ad6e3e67e59f68853e8655cf572e68 100644 (file)
--- a/BaseTools/Source/C/GenBootSector/GenBootSector.c
+++ b/BaseTools/Source/C/GenBootSector/GenBootSector.c
@@ -4,7 +4,7 @@ Reading/writing MBR/DBR.
     If we write MBR to disk, we just update the MBR code and the partition table wouldn't be over written.\r
     If we process DBR, we will patch MBR to set first partition active if no active partition exists.\r
     \r
-Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials                          \r
 are licensed and made available under the terms and conditions of the BSD License         \r
 which accompanies this distribution.  The full text of the license may be found at        \r
@@ -201,6 +201,7 @@ Return:
     //\r
     // Only care about the disk.\r
     //\r
+    CloseHandle(VolumeHandle);\r
     return FALSE;\r
   } else{\r
     DriveInfo->DiskNumber = StorageDeviceNumber.DeviceNumber;\r
@@ -437,8 +438,8 @@ ProcessBsOrMbr (
   BYTE              DiskPartitionBackup[0x200] = {0};\r
   DWORD             BytesReturn;\r
   INT               DrvNumOffset;\r
-  HANDLE            InputHandle;\r
-  HANDLE            OutputHandle;\r
+  HANDLE            InputHandle = INVALID_HANDLE_VALUE;\r
+  HANDLE            OutputHandle = INVALID_HANDLE_VALUE;\r
   ERROR_STATUS      Status;\r
   DWORD             InputDbrOffset;\r
   DWORD             OutputDbrOffset;\r
@@ -448,7 +449,7 @@ ProcessBsOrMbr (
   //\r
   Status =  GetFileHandle(InputInfo, ProcessMbr, &InputHandle, &InputDbrOffset);\r
   if (Status != ErrorSuccess) {\r
-    return Status;\r
+    goto Done;\r
   }\r
 \r
   //\r
@@ -456,14 +457,15 @@ ProcessBsOrMbr (
   //\r
   Status = GetFileHandle(OutputInfo, ProcessMbr, &OutputHandle, &OutputDbrOffset);\r
   if (Status != ErrorSuccess) {\r
-    return Status;\r
+    goto Done;\r
   }\r
 \r
   //\r
   // Read boot sector from source disk/file\r
   // \r
   if (!ReadFile (InputHandle, DiskPartition, 0x200, &BytesReturn, NULL)) {\r
-    return ErrorFileReadWrite;\r
+    Status = ErrorFileReadWrite;\r
+    goto Done;\r
   }\r
 \r
   if (InputInfo->Type == PathUsb) {\r
@@ -473,7 +475,8 @@ ProcessBsOrMbr (
       //\r
       DrvNumOffset = GetDrvNumOffset (DiskPartition);\r
       if (DrvNumOffset == -1) {\r
-        return ErrorFatType;\r
+        Status = ErrorFatType;\r
+        goto Done;\r
       }\r
       //\r
       // Some legacy BIOS require 0x80 discarding MBR.\r
@@ -495,7 +498,8 @@ ProcessBsOrMbr (
       // Use original partition table\r
       //\r
       if (!ReadFile (OutputHandle, DiskPartitionBackup, 0x200, &BytesReturn, NULL)) {\r
-        return ErrorFileReadWrite;\r
+        Status = ErrorFileReadWrite;\r
+        goto Done;\r
       }\r
       memcpy (DiskPartition + 0x1BE, DiskPartitionBackup + 0x1BE, 0x40);\r
       SetFilePointer (OutputHandle, 0, NULL, FILE_BEGIN);\r
@@ -507,13 +511,19 @@ ProcessBsOrMbr (
   // Write boot sector to taget disk/file\r
   // \r
   if (!WriteFile (OutputHandle, DiskPartition, 0x200, &BytesReturn, NULL)) {\r
-    return ErrorFileReadWrite;\r
+    Status = ErrorFileReadWrite;\r
+    goto Done;\r
   }\r
 \r
-  CloseHandle (InputHandle);\r
-  CloseHandle (OutputHandle);\r
+Done:\r
+  if (InputHandle != INVALID_HANDLE_VALUE) {\r
+    CloseHandle (InputHandle);\r
+  }\r
+  if (OutputHandle != INVALID_HANDLE_VALUE) {\r
+    CloseHandle (OutputHandle);\r
+  }\r
 \r
-  return ErrorSuccess;\r
+  return Status;\r
 }\r
 \r
 void\r
@@ -621,6 +631,14 @@ GetPathInfo (
        return ErrorSuccess;\r
   } \r
 \r
+  //\r
+  // Check the path length\r
+  //\r
+  if (strlen (PathInfo->Path) >= (sizeof (PathInfo->PhysicalPath) / sizeof (PathInfo->PhysicalPath[0]))) {\r
+    fprintf (stderr, "ERROR, Path is too long for - %s", PathInfo->Path);\r
+    return ErrorPath;\r
+  }\r
+\r
   PathInfo->Type = PathFile;\r
   if (PathInfo->Input) {\r
     //\r
@@ -630,10 +648,16 @@ GetPathInfo (
     if (f == NULL) {\r
       fprintf (stderr, "error E2003: File was not provided!\n");\r
       return ErrorPath;\r
-    }  \r
+    }\r
+    fclose (f);\r
   }\r
   PathInfo->Type = PathFile;\r
-  strcpy(PathInfo->PhysicalPath, PathInfo->Path);\r
+  strncpy(\r
+    PathInfo->PhysicalPath,\r
+    PathInfo->Path,\r
+    sizeof (PathInfo->PhysicalPath) / sizeof (PathInfo->PhysicalPath[0]) - 1\r
+    );\r
+  PathInfo->PhysicalPath[sizeof (PathInfo->PhysicalPath) / sizeof (PathInfo->PhysicalPath[0]) - 1] = 0;\r
 \r
   return ErrorSuccess;\r
 }    \r