ORA-7445 [kmnsbf()+84] Followed By ORA-600  in PMON Process Crashes the Instance
Last updated on JULY 09, 2013
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.3 and later
Information in this document applies to any platform.
When using shared server processes on the instance a core dump is experienced and then it is followed by ORA-600  and instance crash.
Errors are similar to:
ORA-07445: exception encountered: core dump [kmnsbf()+84] [SIGBUS] [Invalid address alignment] [0x202066726F6D207B]  
ORA-00600: internal error code, arguments: , [0x3B9ACF4A0], , , , , , 
PMON: terminating instance due to error 472
Stack Trace from the 7445 is similar to:
ksedmp ssexhd sighndlr call_user_handler kmnsbf nsbfr nsiofrrg nsopen_shutitdown nsclose nsdisc kmddsl kmderr kmdu2s kmdmai kmmrdp
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