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    SubjectRe: Either the IP masq code or my brain is broken.
    On Tue, Oct 27, 1998 at 12:01:24PM +0100, David Woodhouse wrote:
    > > For what address exactly does the oops occur?
    >
    > I've got three oopsen on record (of my own). Of those, one was 'page fault
    > from irq handler', and the other two were oopsing on the address c2000000.
    [...]

    Could you check if this patch solves the problem?

    Index: linux/net/ipv4/ip_masq.c
    ===================================================================
    RCS file: /vger/u4/cvs/linux/net/ipv4/ip_masq.c,v
    retrieving revision 1.26
    diff -u -r1.26 ip_masq.c
    --- ip_masq.c 1998/09/24 03:38:58 1.26
    +++ ip_masq.c 1998/10/29 14:31:05
    @@ -1011,14 +1011,19 @@
    switch (skb->ip_summed)
    {
    case CHECKSUM_NONE:
    + {
    + int datasz;
    doff = proto_doff(iph->protocol, h.raw);
    - csum = csum_partial(h.raw + doff, size - doff, 0);
    + datasz = size - doff;
    + if (datasz < 0)
    + return -1;
    + csum = csum_partial(h.raw + doff, datasz, 0);
    IP_MASQ_DEBUG(3, "O-pkt: %s I-datacsum=%d\n",
    masq_proto_name(iph->protocol),
    csum);

    skb->csum = csum_partial(h.raw , doff, csum);
    -
    + }
    case CHECKSUM_HW:
    if (csum_tcpudp_magic(iph->saddr, iph->daddr,
    size, iph->protocol, skb->csum))


    -Andi

    -
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