[ros-dev] crash in usetup if an allocation size is given for a call to NtCreateFile

[Hartmut Birr]

Hi,

I've done some little changes in usetup for optimisation. One thing is 
the decompressing of files from a cabinet container. If the destination 
file exist, it is created with the create disposition FILE_OVERWRITE and 
without a pointer to the allocation size. If I add an allocation size 
pointer (cabinet.c.diff), usetup does crash after copying of all files 
and creating the registry.

(ntoskrnl\ke\exception.c:94) KiRaiseException
(ntoskrnl\ke\i386\exp.c:1306) Unhandled UserMode exception, terminating 
thread
Exception: -1160049408(0)
Processor: 0 CS:EIP 1b:12000 ?????
cr2 66f924 cr3 56a000 Proc: 8094a1f0 Pid: 5c <smss.exe> Thrd: 80954088 
Tid: 60
DS 23 ES 23 FS 3b GS 0
EAX: 00012000   EBX: 00000001   ECX: 0066fc18
EDX: 7c90a479   EBP: 0066ff54   ESI: 00000004   ESP: 807ebd64
EDI: 0066fc28   EFLAGS: 00000216 Frames:
<smss.exe:741b> subsys/system/usetup/console.c:660
<smss.exe:19c41> subsys/system/usetup/usetup.c:3321
<smss.exe:1a65e> subsys/system/usetup/usetup.c:3781
<0>

The address of the crash has nothing to do with the decompressing of the 
install files. If I change IoCreateFile file a little bit, that the 
allocation size pointer isn't read (file.c.diff), usetup didn't crash. 
Has someone an idea what is wrong?

- Hartmut


Index: subsys/system/usetup/cabinet.c
===================================================================
--- subsys/system/usetup/cabinet.c	(Revision 18300)
+++ subsys/system/usetup/cabinet.c	(Arbeitskopie)
@@ -859,6 +859,7 @@
   UnicodeString.Buffer = DestName + wcslen( DestName );
   UnicodeString.Length = 0;
   RtlAnsiStringToUnicodeString( &UnicodeString, &AnsiString, FALSE );
+  MaxDestFileSize.QuadPart = Search->File->FileSize;
 
   /* Create destination file, fail if it already exists */
   RtlInitUnicodeString(&UnicodeString,
@@ -884,7 +885,7 @@
 						  0);
   if (!NT_SUCCESS(NtStatus))
     {
-      DPRINT("NtCreateFile() failed (%S) (%x).\n", DestName, NtStatus);
+      DPRINT1("NtCreateFile() failed (%S) (%x).\n", DestName, NtStatus);
 
       /* If file exists, ask to overwrite file */
       if (OverwriteHandler == NULL || OverwriteHandler(Search->File, DestName))
@@ -894,7 +895,7 @@
 								  GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE,
 								  &ObjectAttributes,
 								  &IoStatusBlock,
-								  NULL,
+								  &MaxDestFileSize,
 								  FILE_ATTRIBUTE_NORMAL,
 								  0,
 								  FILE_OVERWRITE,
@@ -903,7 +904,7 @@
 								  0);
           if (!NT_SUCCESS(NtStatus))
             {
-              DPRINT("NtCreateFile() failed 2 (%S) (%x).\n", DestName,
NtStatus);
+              DPRINT1("NtCreateFile() failed 2 (%S) (%x).\n", DestName,
NtStatus);
               return CAB_STATUS_CANNOT_CREATE;
             }
         }
@@ -913,7 +914,6 @@
           return CAB_STATUS_FILE_EXISTS;
         }
     }
-  MaxDestFileSize.QuadPart = Search->File->FileSize;
   NtStatus = NtCreateSection(&DestFileSection,
 							 SECTION_ALL_ACCESS,
 							 0,
@@ -964,7 +964,10 @@
     }
   else
     {
+//      memcpy(&FileBasic.CreationTime, &FileTime, sizeof(FILETIME));
       memcpy(&FileBasic.LastAccessTime, &FileTime, sizeof(FILETIME));
+//      memcpy(&FileBasic.LastWriteTime, &FileTime, sizeof(FILETIME));
+//      memcpy(&FileBasic.ChangeTime, &FileTime, sizeof(FILETIME));
 	  
       NtStatus = NtSetInformationFile(DestFile,
 									  &IoStatusBlock,
@@ -1050,6 +1053,7 @@
   Status = CAB_STATUS_SUCCESS;
  UnmapDestFile:
   NtUnmapViewOfSection(NtCurrentProcess(), DestFileBuffer);
+//  NtFlushBuffersFile(DestFile, &IoStatusBlock);
  CloseDestFileSection:
   NtClose(DestFileSection);
  CloseDestFile:

Index: ntoskrnl/io/file.c
===================================================================
--- ntoskrnl/io/file.c	(Revision 18300)
+++ ntoskrnl/io/file.c	(Arbeitskopie)
@@ -787,7 +787,11 @@
                      sizeof(ULONG));
        if(AllocationSize != NULL)
        {
-         SafeAllocationSize = ProbeForReadLargeInteger(AllocationSize);
+         ProbeForRead(AllocationSize,
+                      sizeof(LARGE_INTEGER),
+                      sizeof(ULONG));
+         SafeAllocationSize.QuadPart  = 0 /* AllocationSize->QuadPart */;
+//         SafeAllocationSize = ProbeForReadLargeInteger(AllocationSize);
        }
        else
          SafeAllocationSize.QuadPart = 0;