IC89270: cimprovagt segfaults reported when trace file name rolls over

APAR status

• Closed as fixed if next.

Error description

• When Director Platform Agent cimserver logging is enabled, its
  trace file size will keep growing and may reach the limitation
  of 2 Gigabyte. At this point the file name will roll over with a
  suffix like ?.1? and then segfaults for cimprovagt may be
  reported.
  
  Impact:  The  Common Information Model (CIM) provider module
  that experiences this cimprovagt segfault will crash and can not
  be restarted.
  

Local fix

• To resolve this issue, stop the CIM server by running
  ?/etc/init.d/cimserverd stop?, remove the trace files and thenﾵ>
  start the CIM server by running ?/etc/init.d/cimserverd
  start?.
  

Problem summary

• When Director Platform Agent cimserver logging is enabled, its
  trace file size will keep growing and may reach the limitation
  of 2 Gigabyte, at this point the file name will roll over with a
  suffix like ?.1? but the memory allocated for the trace file
  name does not take this extra suffix into account.  As a result,
  a buffer overrun issue will be introduced, and at this point,
  segfaults for cimprovagt may be reported.
  
  Generally, this issue is reported for the provider module
  OSBase_MetricValueProvider, but any other provider module may
  also experience this issue. When this issue is reported for the
  OSBase_MetricValueProvider module, the functional ping that the
  Platform Agent Watchdog daemon uses to check the status of the
  Gatherer services will get some errors, and then it will
  consider the Gatherer services as not functioning. The Watchdog
  will then try to restart the Gatherer services when this issue
  is encountered. So in the Linux message file, the Gatherer
  services will be restarted after 4 times of segfault for
  cimprovagt. The typical Linux message log for this issue is
  shown as follows.
  
  Jan  9 11:09:08 xrng26 cimserver[27288]: A failure was detected
  in provider module OSBase_MetricValueProvider.
  Jan  9 11:09:10 xrng26 kernel: cimprovagt[29096]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffcc66cc error
  4
  Jan  9 11:09:40 xrng26 kernel: cimprovagt[29672]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffa3cc1c error
  4
  Jan  9 11:10:40 xrng26 kernel: cimprovagt[31002]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffa778dc error
  4
  Jan  9 11:11:40 xrng26 kernel: cimprovagt[32224]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000fff94c5c error
  4
  Jan  9 11:12:41 xrng26 gatherd[1074]: Gatherd is starting up.
  Jan  9 11:12:41 xrng26 reposd[1078]: Reposd is starting up.
  Jan  9 11:12:41 xrng26 reposd[1079]: Remote reposd is starting
  up.
  Jan  9 11:12:47 xrng26 kernel: cimprovagt[1208]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffebb4fc error
  4
  Jan  9 11:13:17 xrng26 kernel: cimprovagt[1892]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffbb6f1c error
  4
  Jan  9 11:14:17 xrng26 kernel: cimprovagt[3171]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffcfb87c error
  4
  Jan  9 11:15:17 xrng26 kernel: cimprovagt[4492]: segfault at
  000000007261763b rip 0000000000af8175 rsp 00000000ffec4b9c error
  4
  Jan  9 11:16:17 xrng26 gatherd[5757]: Gatherd is starting up.
  Jan  9 11:16:17 xrng26 reposd[5765]: Reposd is starting up.
  Jan  9 11:16:17 xrng26 reposd[5768]: Remote reposd is starting
  up.
  
  This issue will be fixed in a future release of the IBM Systems
  Director Platform Agent.
  
  Platforms: All Linux Platforms that are supported by IBM Systems
  Director
  Versions:  IBM Systems Director Platform Agent v6.3, v6.3.1,
  v6.3.2
  

Problem conclusion

• The fix for this APAR is available in IBM Systems Director
  release 6.3.3.
  

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

• R610 PSN

     UP

• R611 PSN

     UP

• R612 PSN

     UP

• R620 PSN

     UP

• R621 PSN

     UP

• R630 PSN

     UP

• R631 PSN

     UP

• R632 PSN

     UP