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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2005-09-06 15:10:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-09-06 15:10:23 -0700 |
| commit | 91c46e2e60da0b43a1e8740729737318862f64eb (patch) | |
| tree | 9391e8fd9376919c0adcaf319581f642dac211f5 /net/ipv4 | |
| parent | e7dfb09a3624a32df2dd00683875d0e56406a603 (diff) | |
| download | linux-stable-91c46e2e60da0b43a1e8740729737318862f64eb.tar.gz linux-stable-91c46e2e60da0b43a1e8740729737318862f64eb.tar.bz2 linux-stable-91c46e2e60da0b43a1e8740729737318862f64eb.zip | |
[NETFILTER]: Don't increase master refcount on expectations
As it's been discussed [1][2]. We shouldn't increase the master conntrack
refcount for non-fulfilled conntracks. During the conntrack destruction,
the expectations are always killed before the conntrack itself, this
guarantees that there won't be any orphan expectation.
[1]https://lists.netfilter.org/pipermail/netfilter-devel/2005-August/020783.html
[2]https://lists.netfilter.org/pipermail/netfilter-devel/2005-August/020904.html
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_core.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c index e23e8ca476c0..babce304c619 100644 --- a/net/ipv4/netfilter/ip_conntrack_core.c +++ b/net/ipv4/netfilter/ip_conntrack_core.c @@ -938,6 +938,9 @@ void ip_conntrack_unexpect_related(struct ip_conntrack_expect *exp) write_unlock_bh(&ip_conntrack_lock); } +/* We don't increase the master conntrack refcount for non-fulfilled + * conntracks. During the conntrack destruction, the expectations are + * always killed before the conntrack itself */ struct ip_conntrack_expect *ip_conntrack_expect_alloc(struct ip_conntrack *me) { struct ip_conntrack_expect *new; @@ -948,17 +951,14 @@ struct ip_conntrack_expect *ip_conntrack_expect_alloc(struct ip_conntrack *me) return NULL; } new->master = me; - atomic_inc(&new->master->ct_general.use); atomic_set(&new->use, 1); return new; } void ip_conntrack_expect_put(struct ip_conntrack_expect *exp) { - if (atomic_dec_and_test(&exp->use)) { - ip_conntrack_put(exp->master); + if (atomic_dec_and_test(&exp->use)) kmem_cache_free(ip_conntrack_expect_cachep, exp); - } } static void ip_conntrack_expect_insert(struct ip_conntrack_expect *exp) |