APAR status
Closed as program error.
Error description
When socketpair calls are used on the system we could see a crash in socket code path (close, send, etc.) due to one of the sockets in the freelist. Stack could be something like, [00009514].simple_lock+000014 () [0049EB08]unp_disconnect@AF32_12+000228 (??, ??, ??, ??, ??) [0049C574]uipc_usrreq+0005D4 (??, ??, ??, ??, ??) [004C75A8]sodisconn+0001A8 (??) [004C6DE4]soclose2+000BE4 (??, ??) [004C8070]soclose+000010 (??) [004D2734]soo_close+000294 (??) [00630F7C]closef+00005C (??) [00547890]closefd+000150 (??, ??) [00547C44]closex+000304 (??, ??) [00547EBC]close+00011C (??) [00003850]ovlya_addr_sc_flih_main+000130 () [kdb_get_virtual_memory] no real storage @ 111694A50 [900000000B192F4]0900000000B192F4 () [kdb_read_mem] no real storage @ FFFFFFFFFFF6380 This is because the socket in unp_conn is already freed.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * Systems running the AIX 5300-12 Technology Level with the * kernels (bos.mp, bos.mp64) below the 5.3.12.6 level. * * Customers running Oracle RAC 11.2.0.3 or newer, with * Oracle Cluster Health Monitor (CHM), are likely to see * this problem. * **************************************************************** * PROBLEM DESCRIPTION: * System crash using socketpair() with a stack similar to: * * 00009514 .simple_lock+000014 () * 0049EB08 unp_disconnect@AF32_12+000228 (??, ??, ??, ??, ??) * 0049C574 uipc_usrreq+0005D4 (??, ??, ??, ??, ??) * 004C75A8 sodisconn+0001A8 (??) * 004C6DE4 soclose2+000BE4 (??, ??) * 004C8070 soclose+000010 (??) * 004D2734 soo_close+000294 (??) * 00630F7C closef+00005C (??) * 00547890 closefd+000150 (??, ??) * 00547C44 closex+000304 (??, ??)
Problem conclusion
The code in socketpair() system call modifid so that in multithreaded environment, another thread is not able to close one of the sockets during critical pairing phase.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IV19178
Reported component name
AIX 5.3
Reported component ID
5765G0300
Reported release
530
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Submitted date
2012-04-09
Closed date
2012-04-09
Last modified date
2013-03-26
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 5.3
Fixed component ID
5765G0300
Applicable component levels
R530 PSY
UP
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Document Information
Modified date:
26 March 2013