Re: cvs commit: src/sys/netinet if_ether.c

From: Gleb Smirnoff (glebius_at_freebsd.org)
Date: 10/27/04

  • Next message: Julian Elischer: "Re: Implementing IP_SENDIF (like SO_BINDTODEVICE)" 
    Date: Wed, 27 Oct 2004 23:12:33 +0400
To: bms@freebsd.org

      Bruce,

    On Mon, Oct 25, 2004 at 08:41:26PM -0700, Bruce M Simpson wrote:
    B> On Tue, Oct 26, 2004 at 03:31:59AM +0000, Bruce M Simpson wrote:
    B> > Log:
    B> > Check that rt_mask(rt) is non-NULL before dereferencing it, in the
    B> > RTM_ADD case, thus avoiding a panic.
    B>
    B> PR: kern/42030
    B>
    B> It isn't immediately clear to me if this is a routing socket API issue
    B> or a client issue.
    B>
    B> The panic, at least, is worked around, but the root problem needs to be
    B> fixed -- it is most likely a synchronization problem in zebra whereby it
    B> is attempting to add a route to the kernel FIB which references an
    B> interface which does not yet exist or has gone away.
    B>
    B> At least one person who has reported this was running vtund, which plumbs
    B> its own tun instances on demand; the other I think was running userland ppp.
    B>
    B> I haven't seen anything similar with XORP yet.

    If we are interested in tracking this down, we should add a printf,
    so that people who hit this will notce it and report.
    Otherwise this problem will be left forever in a workaround state. 

    -- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE
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  • Next message: Julian Elischer: "Re: Implementing IP_SENDIF (like SO_BINDTODEVICE)"