On 25/03/11 01:21, Sam Roberts wrote:
Screenshot attached. At the time I had 3 connections to nfnetlink open - a userspace connection tracker
what protocol are you tracking from user-space?
- a utility of mine that prints conntrack and expect events (https://github.com/sam-github/libnet/blob/master/lua/nfct-events) - watch -n0.8 -d sudo conntrack -L e It was after 5 or so loops of the watch that the kernel BUGged out. kernel is 2.6.38-020638-generic (ubuntu's v2.6.28-natty). For what it's worth, ctnetlink_exp_dump_expect() seems to assume that the expectation being printed has a helper with a name that it can call strlen() on: helper = rcu_dereference(help->helper); if (helper) NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name); }
AFAICS, the only way to hit this problem is to have some connection tracking helper in the kernel which overlaps your user-space helper, ie. someone is attaching a kernel helper to your conntrack.
The expectation being printed is one I created from userspace, so I don't know what helper was found for it, or what it's name would be (if any).
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