Re: ax25 kernel problem sometimes accur

From: Tihomir Heidelberg (qotlfc@register.com)
Date: Wed Dec 04 2002 - 22:20:09 EET

  • Next message: Kjell Jarl: "Re: ax25 kernel problem sometimes accur"

    Hi Sanyi,

    thanks for reply, I applyed a fix explained in my post to linux-hams
    and I am waiting to see if this bug will occur again....
        
    please, are you interested for testing this also ? it would be also
    good if ha5ob is interested... it would help me to find if it helps
    or not, because it is hard to find a host with high traffic that
    have this problem :)

    to try it you just need to edit /usr/src/linux/net/ax25/af_ax25.c
    and in function ax25_free_sock just add this line at the end:
            sk->protinfo.ax25->sk=NULL;
    so, the ax25_free_sock function should look:
    static void ax25_free_sock(struct sock *sk)
    {
            ax25_free_cb(sk->protinfo.ax25);
            sk->protinfo.ax25->sk=NULL;
    }

    of course, then you should do make modules;make modules_install
    if you use ax25 in module or make install if you have it compiled
    in kernel.

    this should not do anything harmfull in kernel, I am quite sure :)

    by my opinion, when kernel destroy an socket, there is still a pointer
    in ax25 control block that points to that destroyed socket and everytime
    it access it it crash.

    so, will see if this will help...

    73 de Tihomir, terhi.victor@logonet.com
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