A fix is available
APAR status
Closed as program error.
Error description
One of the CPUs can have stack similar to this at the time of hang. --- CPU #3 --- pvthread+001800 STACK: [0463EA0C]netinet:flags6_passq+00010C (F1000A002194FB10, 0000000000000000, 0000000000000000, F1000A002194F858, F1000A002194F852, F1000A002194F851, F1000A002194F860, F1000A002194F9D0 [??]) [0463F478]netinet:check6_pkt+0000F8 (??, ??, ??) [04683F68]netinet:opt6_mls_input+000088 (??, ??, ??, ??) [04683710]netinet:hd6_inoptions+0000B0 (??, ??, ??) [0467EB14]netinet:hop6_input+000234 (??, ??, ??, ??) [04681714]netinet:ip6_input+0007D4 (F1000E0000160000, F1000A002194FC40) [0460CE70]netinet:ipintr_noqueue_post_fw+001870 (F1000A1005DE0D50, ....
Local fix
Problem summary
If a malformed IPv6 packet is sent to a AIX machine, the AIX machine can hang while processing that packet. One of the CPUs can have stack similar to this at the time of hang. --- CPU #3 --- pvthread+001800 STACK: 0463EA0C netinet:flags6_passq+00010C (F1000A002194FB10, 0000000000000000, 0000000000000000, F1000A002194F858, F1000A002194F852, F1000A002194F851, F1000A002194F860, F1000A002194F9D0 ?? ) 0463F478 netinet:check6_pkt+0000F8 (??, ??, ??) 04683F68 netinet:opt6_mls_input+000088 (??, ??, ??, ??) 04683710 netinet:hd6_inoptions+0000B0 (??, ??, ??) 0467EB14 netinet:hop6_input+000234 (??, ??, ??, ??) 04681714 netinet:ip6_input+0007D4 (F1000E0000160000, F1000A002194FC40) 0460CE70 netinet:ipintr_noqueue_post_fw+001870 (F1000A1005DE0D50, ....
Problem conclusion
Added some checks in AIX IPV6 code to avoid a possible infinite loop when processing IPV6 packets.
Temporary fix
Comments
6100-06 - use AIX APAR IV37925 6100-07 - use AIX APAR IV42072 6100-08 - use AIX APAR IV42124 7100-00 - use AIX APAR IV42264 7100-01 - use AIX APAR IV42229 7100-02 - use AIX APAR IV42095
APAR Information
APAR number
IV37925
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2013-03-12
Closed date
2013-05-07
Last modified date
2013-11-24
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 U857748
UP13/08/01 I 1000
PTF to Fileset Mapping
U857748 bos.net.tcp.client 6.1.6.23
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Document Information
Modified date:
24 November 2013