Re: NFS client may be broken in 2.2.11pre4 (SOLVED)

Frank van Maarseveen (fvm@tasking.nl)
Thu, 5 Aug 1999 13:42:56 +0200

> From: bmccann@indusriver.com
> Date: Tue, 03 Aug 1999 05:45:01 -0400
>
> SOLUTION--------------------------------------------
>
> The following code was added at line 614 in ip_fw.c in either pre3 or pre4:
>
> /* If it is a truncated first fragment then it can be
> * used to rewrite port information, and thus should
> * be blocked.
> */
> if (offset && (ntohs(ip->frag_off) & IP_MF)) {
> if (!testing && net_ratelimit()) {
> /*printk(KERN_ERR "Suspect short first fragment.\n");*/
> dump_packet(ip,rif,NULL,NULL,0,0,0,0);
> }
> return FW_BLOCK;
> }
>
> According to dump_packet, the NFS UDP packet is a fragment and it has the
> MustFragment bit set. This code should be removed and/or fixed.

Thanks for finding the cause. I've disabled the code as a bug bypass
for my linux box so I can continue testing NFS.

-- 
Frank


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