Le mardi 02 février 2010 à 18:04 +0100, Patrick McHardy a écrit :

Ah nice catch, that seems to be the problem. When the untracked
conntrack is already attached to an skb and thus has refcnt > 1
and we re-initalize the refcnt, it will get freed.

The question is whether the ct_net pointer of the untracked conntrack
is actually required. If so, we need one instance per namespace,
otherwise we can just move initialization and cleanup to the init_net
init/cleanup functions. Alexey, do you happen to know this?

One untracked per netns seems the way to go, and move it outside of
read_mostly area too, we obviously can modify its refcount frequently...


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