IJ54005: SYSTEM CRASH IN RTFREE() WITH CACHED_ROUTE NO OPTION ENABLED APPLIES TO AIX 7300-02

APAR status

• Closed as program error.

Error description

• When cached_routes no option is enabled,
  system may crash with following stack:
  
  CRASH INFORMATION:
  CPU 1 CSA F100091560084D00 at time of crash, error code
  for LEDs: 70000000
  pvthread+081800 STACK:
  [0002CB80]abend_trap+000000 ()
  [0059FEE4]rtfree+0000A4 (??)
  [07D14418]en_output+001198 (??, ??, ??, ??)
  [079B5E08]ip6_output+000FE8 (F100100000152800,
  0000000000000003,
     0000000000000660, 2000000020000000, 0000000000000000,
  DEADBEEFDEADBEEF,
     0000000000000000, 800000003400009A)
  [07A2E1DC]tcp_output+00121C (??)
  [07A492B8]tcp_timers+001318 (??, ??)
  [07A2BBB0]tcp_usrreq+001F30 (??, ??, ??, ??, ??)
  [07A49F08]tcp_slowtimo+0005A8 ()
  [005EC0F8]pfslowtimo@AF49_18+000138 (??)
  [005DB4C0]Netintr+000320 ()
  [005DB160]netisr_thread+000020 ()
  

Local fix

Problem summary

• Crash was seen when cached_route option is enabled Below is kdb
  back trace for the crash
  
  (0)> f pvthread+083900 STACK:   0002CB80 abend_trap+000000 ()
   0059FEE4 rtfree+0000A4 (??)  07D14418 en_output+001198 (??,
  ??, ??, ??)  079B5E08 ip6_output+000FE8 (F1001000089AAA00,
  F10010000878EAA0,
     FFFF3C3FFFFFFFFF, 0000000000000000, 0000000000000000,
     0000000007ADF800, 0000000000000000, 0000000006BC8500)
   07A2E1DC tcp_output+00121C (??)  07A492B8 tcp_timers+001318
  (??, ??)  07A2BBB0 tcp_usrreq+001F30 (??, ??, ??, ??, ??)
   07A49F08 tcp_slowtimo+0005A8 ()
   005EC0F8 pfslowtimo@AF49_18+000138 (??)
   005DB4C0 Netintr+000320 ()  005DB160 netisr_thread+000020 ()
   00489FE8 threadentry+000088 (??, ??, ??, ??)
  

Problem conclusion

• Code changes are done to fix the crash issue
  

Temporary fix

Comments

APAR Information

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

  IJ53896

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

Fix information

• Fixed component name

  AIX V7.3

• Fixed component ID

  5765CD300

Applicable component levels