Date: Wed, 27 Oct 2004 23:12:33 +0400 From: Gleb Smirnoff <glebius@freebsd.org> To: bms@freebsd.org Cc: freebsd-net@freebsd.org Subject: Re: cvs commit: src/sys/netinet if_ether.c Message-ID: <20041027191233.GF44427@cell.sick.ru> In-Reply-To: <20041026034126.GI706@empiric.icir.org> References: <200410260331.i9Q3Vxbv060994@repoman.freebsd.org> <20041026034126.GI706@empiric.icir.org>
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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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