Re: raw ipv6 broken in 2.4.19

[Julian Anastasov <ja@xxxxxx>]

        Hello,

On 13 Aug 2002, Martin Josefsson wrote:

> On Tue, 2002-08-13 at 15:58, kuznet@xxxxxxxxxxxxx wrote:
>
> > Very strange. We have similar phenomenon reported with TCP, by the way.
> > So, I have to assume that checksumming routine is wrong and does some shit
> > sort of relying on an uninitialized data.
>
> I've added some debug printk's and found out that it's the call to
> csum_fold that fails in skb_copy_and_csum_datagram_iovec.

        What about the known problem with csum_partial called
with zero length. IIRC, on CONFIG_X86_USE_PPRO_CHECKSUM compilation
this function depends on the data alignment (addr&2!=0 => bug) - calling 
csum_partial with zero length in 2.4+ is a bug, checks should be added
in the caller. Can this be problem with skb_copy_and_csum_datagram_iovec? 
I see that net/ipv6/raw.c provides 0 as hlen.

Regards

--
Julian Anastasov <ja@xxxxxx>