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SubjectNework Emulation with UML, bug 8895
Hello,
You can have a configured and running network inside a single linux machine,
only one script command is enough. After the start of all the machine, a
graphical representation of your topology helps your interactions with
the network. This virtual network can be downloaded at http://clownix.net,
I must warn you, it is a 350mega bz2 file-system that needs 4 giga on
the host.
Very usefull for networking development in kernel as proved by bug 8895
that has been found with the above tool:

The uncorrected bug 8895:

file: /usr/src/linux-2.6.24.2/net/ipv6/ip6_fib.c line 796:
"dst_free(&rt->u.dst);"

------- /Comment From qmiao <mailto:qmiao@centecnetworks.com> 2007-08-29
23:33:07 /---

fib6_add
...

if (fn->leaf == NULL) {
fn->leaf = rt; <--**-- rt is assigned to fn->leaf
atomic_inc(&rt->rt6i_ref);
}
...
err = fib6_add_rt2node(fn, rt, info); <-**- return -EEXIST
...
(Here err was not null)
...
if (err) {
...
dst_free(&rt->u.dst); <--**-- Actually rt is still in
tree (fn->leaf = rt /* see above */)
...
}




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