WORKAROUND:
1. if the data block corruption occurs on the table itself, then disable this table for post
sp_ctrl> set param SP_OPO_DISABLE_OBJECT_NUM <source object id for this table>
sp_ctrl> start post
Once you rebuild the table, then reset this parameter
sp_ctrl> stop post
sp_ctrl> reset param SP_OPO_DISABLE_OBJECT_NUM
And compare/repair this table to bring it back in sync with source data.
2. If the data block corruption occurs on the index, then rebuild the problem index and restart post
3. For ORA-600 errors, please contact Oracle support.