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VSX machine with enabled IPv6 might crash when running 'netstat' command
Symptoms
  • VSX machine with enabled IPv6 might crash when running 'netstat' command.

  • Backtrace from the VMCORE file shows:

    PID: PID  TASK: ...  CPU: N  COMMAND: "netstat" 
     #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 ...
    #10 [...] [ipv6] tcp6_seq_show(...) at tcp_ipv6.c
    #11 [...] seq_read(...) at seq_file.c
    #12 [...] vfs_read(...) at read_write.c
    #13 [...] sys_read(...) at read_write.c
    #14 [...] sysenter_do_call() at ...
    
Cause

IPv6 is incorrectly processed as IPv4.


Solution
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