tree 3fd31a00ff22584e3800e6f1538a67b94bb4d701
parent 11d5f15723c9f39d7c131d0149d024c17dbef676
author Florian Westphal <fw@strlen.de> 1474580957 +0200
committer Pablo Neira Ayuso <pablo@netfilter.org> 1474808048 +0200

netfilter: evict stale entries when user reads /proc/net/nf_conntrack

Fabian reports a possible conntrack memory leak (could not reproduce so
far), however, one minor issue can be easily resolved:

> cat /proc/net/nf_conntrack | wc -l = 5
> 4 minutes required to clean up the table.

We should not report those timed-out entries to the user in first place.
And instead of just skipping those timed-out entries while iterating over
the table we can also zap them (we already do this during ctnetlink
walks, but I forgot about the /proc interface).

Fixes: f330a7fdbe16 ("netfilter: conntrack: get rid of conntrack timer")
Reported-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>