Issue

• After updating to RHEL7.5 or later kernel panics due to invalid memory access provided by "KsFree()" function of "oracleoks" kernel module.

crash> bt
PID: 33293  TASK: ffff982bc5e3af70  CPU: 4   COMMAND: "modprobe"
 #0 [ffff982caff9fad8] machine_kexec at ffffffffbde629da
 #1 [ffff982caff9fb38] __crash_kexec at ffffffffbdf16692
 #2 [ffff982caff9fc08] crash_kexec at ffffffffbdf16780
 #3 [ffff982caff9fc20] oops_end at ffffffffbe51d728
 #4 [ffff982caff9fc48] no_context at ffffffffbe50c6cd
 #5 [ffff982caff9fc98] __bad_area_nosemaphore at ffffffffbe50c764
 #6 [ffff982caff9fce8] bad_area_nosemaphore at ffffffffbe50c8d5
 #7 [ffff982caff9fcf8] __do_page_fault at ffffffffbe5206e0
 #8 [ffff982caff9fd60] do_page_fault at ffffffffbe5208d5
 #9 [ffff982caff9fd90] page_fault at ffffffffbe51c758
    [exception RIP: kfree+85]
    RIP: ffffffffbdffa5f5  RSP: ffff982caff9fe40  RFLAGS: 00010282
    RAX: ffffdbf1b0600040  RBX: ffffb2f758001000  RCX: 0000000000000004
    RDX: 000067e440000000  RSI: 0000000003d09000  RDI: ffffb2f758001000
    RBP: ffff982caff9fe58   R8: 000000000001bb20   R9: ffffffffc081e9dd
    R10: ffff983afe71bb20  R11: ffffdb868549fe00  R12: 0000000003d09000
    R13: ffffffffc081e9dd  R14: 0000000000000000  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff982caff9fe60] KsFree at ffffffffc081e9dd [oracleoks]
#11 [ffff982caff9fe80] odlm_rsb_free_tbl at ffffffffc082bb4f [oracleoks]
#12 [ffff982caff9fe90] odlm_subsys_unconfigure at ffffffffc082b52b [oracleoks]
#13 [ffff982caff9feb8] cleanup_module at ffffffffc08538ae [oracleoks]
#14 [ffff982caff9fec8] sys_delete_module at ffffffffbdf0fe8e
#15 [ffff982caff9ff50] system_call_fastpath at ffffffffbe52579b
    RIP: 00007fc51c8f5027  RSP: 00007ffd37575f08  RFLAGS: 00000246
    RAX: 00000000000000b0  RBX: 00000000025ca6b0  RCX: ffffffffffffffff
    RDX: 0000000000000000  RSI: 0000000000000800  RDI: 00000000025ca718
    RBP: 0000000000000000   R8: 00007fc51cbbd060   R9: 00007fc51c9691a0
    R10: 0000000000000000  R11: 0000000000000206  R12: 00000000025c8210
    R13: 0000000000000000  R14: 00000000025c8508  R15: 0000000000000000
    ORIG_RAX: 00000000000000b0  CS: 0033  SS: 002b