Re: ipv6 panic in 6.0 ([kris@FreeBSD.org: kern/85780: 'panic: bogus refcnt 0' in routing/ipv6])

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 09/28/05

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    Date: Wed, 28 Sep 2005 11:13:20 -0400
To: SUZUKI Shinsuke <suz@kame.net>

    On Wed, Sep 28, 2005 at 12:06:18PM +0900, SUZUKI Shinsuke wrote:
    > Hello kris,
    >
    > >>>>> On Tue, 27 Sep 2005 18:26:34 -0400
    > >>>>> kris@obsecurity.org(Kris Kennaway) said:
    >
    > > Can someone please look into this ipv6 panic? It is now my #1 panic
    > > on 6.0 (every few days, and I hardly make any use of ipv6 except for
    > > light nfs and tcp traffic), so it would be good to get it fixed before
    > > the release.
    >
    > Let me confirm one thing.
    > Did you also see a message "panic: bogus refcnt 0", in your panic?

    Yes, that's the panic string.

    > As far as I investigated, only IF_CLONE_REMREF_LOCKED() can display
    > this message. But it's called only in
    > if_clone_create/detach/destory(), and none of them seems to be called
    > according to the description in the PR. (rtexpunge() in route.c also
    > has this message, but it is commented out by "if 0", so it is not the
    > cause of this message)

    I have a number of (sparc64) cores for this panic if you'd like to see
    them.

    Kris

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