IJ53070: POSSIBLE STACK CORRUPTION WHEN MLXCENT_HW_TX_DESC_WRITE() CALLED

APAR status

• Closed as fixed if next.

Error description

• CRASH INFORMATION:
  CPU 9 CSA F00000002FF47600 at time of crash, error code
  for LEDs: 30000000
  pvthread+11FD00 STACK:
  [07C21674]mlxcent_hw_tx_desc_write+000074
  (F1000C00448801B8, 00000000000001B8,
     F00000002FF434B0 [??])
  [07B3951C]IPRA.$entcore_tx_send+00351C (??, ??, ??, ??,
  ??)
  [07B35A44]IPRA.$entcore_tx_enqueue+0004E4
  (00E2040A00008004, 0000000000000000,
     F100100000C70800, 0000000007EECB60, 0C07AC0036B9C0CE)
  [07B4043C]entcore_output+00093C (??, ??)
  [07AC03CC]mlxcent_output+00000C (??, ??)
  [F100091590690238]ethchan_output+000258 (??, ??)
  [F1000915906CE97C]sea_output@AF88_68+00079C (??, ??, ??,
  ??)
  [F10009159052A130]send_packet+000250 (??, ??)
  [F10009159052A838]vlan_output+0000F8 (??, ??)
  [00014D70].hkey_legacy_gate+00004C ()
  [085B3AE8]en_output+000868 (??, ??, ??, ??)
  [085B2E9C]arpwhohas+00017C (??, ??, ??, ??)
  [0832125C]arpresolve_common+0003BC (??, ??, ??, ??, ??,
  ??, ??, ??)
  [085B2980]arpresolve+000560 (??, ??, ??, ??)
  [085B36D8]en_output+000458 (??, ??, ??, ??)
  [08283658]ip_output_post_fw+001A78 (0000000000000000,
  F10010000BA00800,
     0000000000000000)
  [082854E8]ip_output+000128 (??, ??, ??, ??, ??, ??)
  [082CE818]tcp_output+001998 (??)
  [082CB55C]tcp_usrreq+001A1C (??, ??, ??, ??, ??)
  [00634E78]soesend+000D18 (??, ??, ??, ??, ??, ??, ??)
  [0065C5F4]sosend+000014 (??, ??, ??, ??, ??, ??)
  [00014F50].kernel_add_gate_cstack+000030 ()
  [08915C18]rtcm_send+0001F8 (??, ??, ??, ??)
  [0891082C]clnt_tcp_callit+00070C (F1000C00294B8800,
  0000000000000003,
     0000000008B783C8, F00000002FF45828, F1000C01C0584E90,
  F1000C003B05A000,
     000000000000000A, 0000000000000001)
  [08993F70]rfscall_progvers+000370 (??, ??, ??, ??, ??,
  ??, ??, ??)
  [089948BC]rfs3call+0000DC (??, ??, ??, ??, ??, ??, ??,
  ??)
  [08AE5990]IPRA.$nfs3lookup_otw+000090 (??, ??, ??, ??)
  [08AEF588]IPRA.$nfs3lookup+000288 (??, ??, ??, ??, ??,
  ??, ??)
  [08AEA170]nfs3_lookup+000150 (??, ??, ??, ??, ??, ??, ??)
  [08986D88]aix2onc_lookup+000088 (??, ??, ??, ??, ??, ??)
  [007590AC]vnop_lookup+0000CC (??, ??, ??, ??, ??, ??)
  [006EAF9C]lookuppn+00083C (??, ??, ??, ??, ??, ??, ??,
  ??)
  [007E9CF8]IPRA.$openpnp+000238 (??, ??, ??, ??, ??, ??,
  ??, ??)
  [007EAAE0]IPRA.$openpath+0002A0 (??, ??, ??, ??, ??, ??,
  ??, ??)
  [007EAEFC]copen+00033C (FFFFFFFEFFFFFFFE,
  0000000000000000,
     0000000020098880, 0000000000000000, 0000000000000004,
  0000000020012B38)
  [007E9884]kopen+000024 (??, ??, ??)
  [0000394C]syscall+000244 ()
  [kdb_get_virtual_memory] no real storage @ 2FF212F8
  [D011C378]D011C378 ()
  
  Stack is paged out but not able to page in as interrupt
  is disabled. Here ARP resolve, vlan, etherchannel, SEA
  all these adding the stack depth beyond the fixed stack
  and hence causing this problem.
  

Local fix

• N/A
  

Problem summary

• System crash in Network Deriver Code
  

Problem conclusion

Temporary fix

Comments

• This APAR is being closed FIN. This means that a solution to
  this APAR is expected to be delivered from IBM in a release
  (if any) to be available within the next 24 months.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IJ53631 IJ53642 IJ54111

Fix information

Applicable component levels