> Source: [sk106571](https://support.checkpoint.com/results/sk/sk106571)

# sk106571 - Cluster members crash simultaneously when running kernel debug of Delta Sync and IPv6 traffic is passing through the cluster

| Property | Value |
|----------|-------|
| Solution ID | sk106571 |
| Date Created | 2015-06-21 |
| Last Modified | 2022-12-05 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * Cluster members crash simultaneously when running kernel debug of Delta Sync ('`fw ctl debug -m fw + sync`') and IPv6 traffic is passing through the cluster, which is inspected by IPS (PSL).

* The following stack appears on the console during the crash:

  ```
  
  PID: ... TASK: ... CPU: N COMMAND: "fw_worker_X" 
  #0 [...] machine_kexec at ...
  #1 [...] crash_kexec at ...
  #2 [...] kdb_main_loop at ...
  #3 [...] kdba_main_loop at ...
  #4 [...] kdb at ...
  #5 [...] kdba_entry at ...
  #6 [...] notifier_call_chain at ...
  #7 [...] __die at ...
  #8 [...] do_page_fault at ...
  #9 [...] error_exit at ...
  [exception RIP: fwlddist_print+...]
  ... ... ...
  #10 [...] fwlddist_print() at ...
  #11 [...] fwldbcast_flush_ex() at ...
  #12 [...] fwlddist_adjust_buf() at ...
  #13 [...] get_sync_buf() at ...
  #14 [...] fwlddist_set_master() at ...
  #15 [...] fwlddist_set() at ...
  #16 [...] fwlddist_kbuf_sync() at ...
  #17 [...] fwtab_sync_kbuf() at ...
  #18 [...] fwconn_chain_sync_opaque() at ...
  #19 [...] fwpslglue_sync_opaque() at ...
  #20 [...] fwpslglue_pkt_handler() at ...
  #21 [...] fwpslglue_chain() at ...
  #22 [...] fwchain_do_ex() at ...
  #23 [...] fw_filter_ip() at ...
  #24 [...] fw_filter_locked() at ...
  #25 [...] fwmultik_process_packet_kernel() at ...
  #26 [...] fwmultik_process_entry() at ...
  #27 [...] fwmultik_process_entry() at ...
  #28 [...] fwmultik_queue_async_dequeue_cb() at ...
  #29 [...] kernel_thread_run() at ...
  #30 [...] kiss_kthread_run() at ...
  #31 [...] plat_run_thread() at ...
  #32 [...] kernel_thread() at ...
  ```

## Solution

[Contact Check Point Support](http://www.checkpoint.com/services/contact/index.html) to get a Hotfix for this issue.   
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.   
For faster resolution and verification please collect [CPinfo](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management and Security Gateways involved in the case.

**Hotfix installation instructions for Gaia/SecurePlatform OS:**

1. Hotfix has to be installed on ***each* cluster memberr** .   

2. Transfer the hotfix package to the machine (into some directory, e.g., */some_path_to_fix/* ).   

3. Unpack the hotfix package:

   ```
   [Expert@HostName]# cd /some_path_to_fix/
   [Expert@HostName]# tar -zxvf fw1_wrapper_HOTFIX_NAME.tgz
   ```

4. Install the hotfix:

   ```
   [Expert@HostName]# ./fw1_wrapper_HOTFIX_NAME
   ```

   **Note:** The script will stop all of Check Point services (*cpstop* ) - read the output on the screen.   

5. Reboot the machine.

---

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