IT31358: POSSIBLE STACK CORRUPTION IN COPYREMOTESTATS()

Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as fixed if next.

Error description

• We have a few calls in copyRemoteStats() like strcat() that do
  not check boundaries of local variables
  before copying or appending data. This can lead to stack
  corruptions.
  
  An example top of before the signal handler stack would be:
  
    #7  <signal handler called>
    #8  0x00007fdf3a1f9577 in __intel_sse2_strcat()
    #9  0x00007fdf3a1f45c9 in copyRemoteStats()
    ...
  
  There is no workaround known.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * We have a few calls in copyRemoteStats() like strcat() that  *
  * do                                                           *
  * not check boundaries of local variables                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to db2 luw version 11.1.4.6                          *
  ****************************************************************
  

Problem conclusion

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:

Fix information

Applicable component levels

• RB10 PSY

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