IT40517: WINDOWS CLIENT CRASHES IN NTDIRLEVELSHAREOPEN DURING RESTORE

APAR status

• Closed as program error.

Error description

• Error Description:
  
  IBM Spectrum Protect Windows client crashes in
  NTDirLevelShareOpen during restore if the restored data has bad
  attributes.
  
  Stack trace:
  dsmc.exe, NTDirLevelShareOpen()+514 bytes
  dsmc.exe, fioWrite()+2384 bytes
  dsmc.exe, rcWriteFile()+2292 bytes
  dsmc.exe, ReceiveAndProcessVerbs()+3988 bytes
  dsmc.exe, RestoreFile()+478 bytes
  dsmc.exe, ProcessFile()+926 bytes
  dsmc.exe, ProcessBatchList()+1254 bytes
  dsmc.exe, rpDoIt()+3501 bytes
  dsmc.exe, DccRestoreConsumer::ProcessRequest()+724 bytes
  dsmc.exe, DccRestoreConsumer::HandleQueue()+1991 bytes
  dsmc.exe, DccRestoreConsumer::DoThread()+493 bytes
  dsmc.exe, startThread()+279 bytes
  ucrtbase.DLL, o__realloc_base()+96 bytes
  KERNEL32.DLL, BaseThreadInitThunk()+34 bytes
  ntdll.dll, RtlUserThreadStart()+52 bytes
  
  A client service trace shows the following messages:
  
  01/18/2022 00:24:09.908 [007188] [7980] :
  ..\..\common\fio\fileio.cpp(3178): fioWrite(): Finished
  processing data block header
     Data Block Size     = 1204286464.675742720
  
  01/18/2022 00:24:09.909 [007188] [7980] :
  ..\..\common\fio\fileio.cpp(3362): fioWrite(): Calling open
  mechanism for blocktype 40 ...
  01/18/2022 00:24:09.909 [007188] [7980] :
  ..\..\common\winnt\ntshare.cpp( 793):
  NTDirLevelShareOpen('FS:\~dir\subdir\file'): Entry.
  01/18/2022 00:24:09.909 [007188] [7980] :
  ..\..\common\winnt\ntshare.cpp( 801): NTDirLevelShareOpen():
  Nothing to backup, returning .
  
  In that case ?data Block Size? is incorrect and ?blocktype 40?
  is not expected which leads to the crash.
  
  
  Initial Impact:
  medium
  
  Additional Keywords:
  
  TS008071796, crash, restore
  
  IBM Spectrum Protect Versions Affected:
  
  All supported IBM Spectrum Protect Client versions on Windows.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect backup-archive client 8.1 running on    *
  * all Microsoft Windows platforms.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed in level 8.1.15. Note that this is     *
  * subject to change at the discretion of IBM.                  *
  ****************************************************************
  

Problem conclusion

• The problem can happen if a user try to restore files and in the
  past this files where migrated by IBM Spectrum Protect HSM for
  Windows and after migration those files were backed up by IBM
  Spectrum Protect backup-archive client where APAR IC76786 ?STUB
  RESTORE FAILS WHEN COMPRESSION WAS USED FOR BACKUP? is not
  fixed.
  To prevent dsmc crash an additional check for NULL data pointer
  is added.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• dsmc
  

Fix information

• Fixed component name

  TSM CLIENT

• Fixed component ID

  5698ISMCL

Applicable component levels