IT36102: MQ appliance might reload while performing SSL connection

APAR status

• Closed as program error.

Error description

• MQ appliance might restart unexpectedly while performing SSL
  connections flows due to SIGSEGV.
  
  The backtrace will show following stack
  
  #0  0x00007f4eb8b170bd in nanosleep () from /???/libc.so.6
  #1  0x00007f4eb8b16f57 in sleep () from /???/libc.so.6
  #2  0x0000000000677b62 in _Z25generateExtendedBacktracev ()
  #3  0x000000000067921a in
  _Z15SaveToBacktraceiP9siginfo_tPvmPKcS3_S3_S3_S3_ (
  #4  0x0000000000cf6d18 in PrintBacktraceImpl
  (signum=signum@entry=11,
  #5  0x0000000000cf6f67 in default_sig_handler(int, siginfo_t *,
  void *) (
  #6  <signal handler called>
  #7  0x00007f4ebb234689 in SSL_CIPHER_get_name () from
  /???/libssl.so.1.0.0
  #8  0x0000000000b02610 in
  _ZN18drMultistepEnabled18ProcessSSLAuthInfoEP5arenaPKcS3_P5drSSL
  P18drSSLReadWriteInfo (h=0x7f4cd480b008, type=0x300d4f7 "s"...,
  #9  0x00000000007c0602 in _ZN9drGateway8AuthInfoEP5arenaPKcS3_ (
  #10 0x0000000000cc9d87 in _ZN14drSinkProtocol10BaseStreamEv (
  #11 0x0000000000cca1b0 in _ZN14drSinkProtocol11DriverSetupEv (
  #12 0x00000000007cc024 in _ZN9drGateway15GetBackProtocolEv (
  #13 0x00000000007cc3e9 in _ZN9drGateway13NoMoreHeadersEv (
  #14 0x00000000007d773d in
  _ZN9drGateway34Process_State_Front_BackConnectionEv
  #15 0x00000000007c991c in _ZN9drGateway12ParsePayloadEv
  (this=0x7f48be950028)
  #16 0x00000000007bf2c1 in
  _ZN9drGateway27FrontProcessorEventCompleteEPvS0_ (
  #17 0x0000000002716e54 in _ZN12dpDispatcher12ServicePortsEil (
  #18 0x000000000271e263 in _ZN12dpDispatcher11SleepOrWorkEi (
  #19 0x000000000272b092 in
  _ZN15dpThreadManager15ThreadEntryProcEPv (
  #20 0x0000000002adb202 in start_dpthread (arg=<optimized out>)
  #21 0x00007f4eb9a52e91 in ??? () from /???/libpthread.so.0
  #22 0x00007f4eb8b51cbd in ??? () from /???/libc.so.6
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All MQ appliance users
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect while attempting to log SSL session information caused
  memory access violation and resulted in appliance reload.
  

Problem conclusion

• MQ appliance code has been modified to perform additional checks
  to prevent the memory access violation error.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.5
  v9.x CD    9.2.1
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

• 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

  MQ APPL M2002 V

• Fixed component ID

  5737H4701

Applicable component levels