A fix is available
APAR status
Closed as program error.
Error description
If a shmatted file which is in use is overwritten with a smaller sized one, then extended to a size that is still smaller than the original size, the system will crash. Stack will look similar to: [002C2464]vmSetSize+000104 (F1000A0019591300, 0000000BA00FA080 [??]) [002F9F7C]iExtend+00013C (??, ??, ??, ??, ??) [002F9CA8]j2_ftruncate+000408 (??, ??, ??, ??, ??) [005BDBD4]vnop_ftrunc+0000D4 (??, ??, ??, ??, ??) [006C8BA8]ftrunc_common+0001A8 (??, ??)
Local fix
Problem summary
If a shmatted file which is in use is overwritten with a smaller sized one, then extended to a size that is still smaller than the original size, the system will crash. Stack will look similar to: 002C2464 vmSetSize+000104 (F1000A0019591300, 0000000BA00FA080 ?? ) 002F9F7C iExtend+00013C (??, ??, ??, ??, ??) 002F9CA8 j2_ftruncate+000408 (??, ??, ??, ??, ??) 005BDBD4 vnop_ftrunc+0000D4 (??, ??, ??, ??, ??) 006C8BA8 ftrunc_common+0001A8 (??, ??)
Problem conclusion
Properly back the files with RBNA blocks. We do this by finalizing the reservation so that the iSize properly reflects the backed size on disk.
Temporary fix
Comments
APAR Information
APAR number
IV44776
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2013-06-24
Closed date
2013-06-24
Last modified date
2014-02-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U859536
UP14/02/17 I 1000
PTF to Fileset Mapping
U859536 bos.mp64 6.1.8.17
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Document Information
Modified date:
17 February 2014