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    SubjectRe: linux 2.3.18, 2.3.18ac10 meltdown
    Hi Lennert,

    i received similar crashes while testing IPv6 stuff with token ring.
    It looks like header construction is attempted with a NULL pointer for
    saddr...

    Please try this patch:

    diff -ru linux-2.2.12/net/ipv6/ip6_output.c linux/net/ipv6/ip6_output.c
    --- linux-2.2.12/net/ipv6/ip6_output.c Fri Apr 23 04:45:20 1999
    +++ linux/net/ipv6/ip6_output.c Sun Sep 19 20:14:59 1999
    @@ -197,8 +197,14 @@
    hdr->nexthdr = proto;
    hdr->hop_limit = np->hop_limit;

    - ipv6_addr_copy(&hdr->saddr, saddr);
    - ipv6_addr_copy(&hdr->daddr, daddr);
    + if (saddr)
    + ipv6_addr_copy(&hdr->saddr, saddr);
    + else
    + printk(KERN_ERR "ip6_nd_hdr: saddr is NULL\n");
    + if (daddr)
    + ipv6_addr_copy(&hdr->daddr, daddr);
    + else
    + printk(KERN_ERR "ip6_nd_hdr: daddr is NULL\n");

    return 0;
    }

    Cheers,
    Jochen

    On Fri, 1 Oct 1999, Lennert Buytenhek wrote:

    > Hi all,
    >
    > How to crash linux 2.3.18*: Basically, listen on a TCPv6 socket and
    > then connect to that socket via a v6 site local address assigned to
    > one of your interfaces.


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