panic while unloading vxio modules

Issue

While unloading vxio or other Veritas Storage Foundation Modules the server panicked with a paging request failure:

BUG: unable to handle kernel paging request at ffffeba40134fa08

The RIP in our case is common place to crash due to memory corruption:

    crash> bt
    PID: 0      TASK: ffff8a3fa7a14aa0  CPU: 112  COMMAND: "swapper"
     #0 [ffff8980e1503ac0] machine_kexec at ffffffff81038f3b
     #1 [ffff8980e1503b20] crash_kexec at ffffffff810c5b62
     #2 [ffff8980e1503bf0] oops_end at ffffffff8152c430
     #3 [ffff8980e1503c20] no_context at ffffffff8104a00b
     #4 [ffff8980e1503c70] __bad_area_nosemaphore at ffffffff8104a295
     #5 [ffff8980e1503cc0] bad_area_nosemaphore at ffffffff8104a363
     #6 [ffff8980e1503cd0] __do_page_fault at ffffffff8104aabf
     #7 [ffff8980e1503df0] do_page_fault at ffffffff8152e37e
     #8 [ffff8980e1503e20] page_fault at ffffffff8152b735
        [exception RIP: free_block+0x97]
        RIP: ffffffff81170597  RSP: ffff8980e1503ed8  RFLAGS: 00010082
        RAX: ffffeba40134fa08  RBX: ffff88bfa16d0440  RCX: 000000000000100f
        RDX: 0000003c002c23b8  RSI: ffff89bfa6293018  RDI: 00000000584775ca
        RBP: ffff8980e1503f28   R8: 0000000000000004   R9: 00000000000000c8
        R10: 000000bbdf7f9455  R11: 0000000000000001  R12: 0000000000000001
        R13: ffff89bfa6293018  R14: 0000000000000000  R15: ffffea0000000000
        ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
     #9 [ffff8980e1503f30] do_drain at ffffffff81170e46
    #10 [ffff8980e1503f60] generic_smp_call_function_interrupt at ffffffff810b33c0
    #11 [ffff8980e1503fa0] smp_call_function_interrupt at ffffffff81030ef7
    #12 [ffff8980e1503fb0] call_function_interrupt at ffffffff8100bdf3
    --- <IRQ stack> ---
    #13 [ffff8abfa7b27db8] call_function_interrupt at ffffffff8100bdf3
        [exception RIP: intel_idle+0xde]
        RIP: ffffffff812e134e  RSP: ffff8abfa7b27e68  RFLAGS: 00000206
        RAX: 0000000000000000  RBX: ffff8abfa7b27ed8  RCX: 0000000000000000
        RDX: 0000000000000da5  RSI: 0000000000000000  RDI: 0000000000354de6
        RBP: ffffffff8100bdee   R8: 0000000000000004   R9: 00000000000000c8
        R10: 000000bbdf7f9455  R11: ffff8abfa7b27e68  R12: 0000000000000086
        R13: ffff8abfa7b27dd8  R14: ffff8980e15115e0  R15: 0000000000000000
        ORIG_RAX: ffffffffffffff03  CS: 0010  SS: 0018
    #14 [ffff8abfa7b27ee0] cpuidle_idle_call at ffffffff814272f7
    #15 [ffff8abfa7b27f00] cpu_idle at ffffffff81009fc6