diff options
| author |   Pablo Neira Ayuso <pablo@netfilter.org> | 2011-06-02 15:08:45 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-06-06 01:37:02 +0200 |
| commit | 88ed01d17b44bc2bed4ad4835d3b1099bff3dd71 (patch) | |
| tree | 619e093aecca3e0e1233e7eb62055265c13835e2 /net/netfilter | |
| parent | netfilter: nf_nat: fix crash in nf_nat_csum (diff) | |
| download | linux-dev-88ed01d17b44bc2bed4ad4835d3b1099bff3dd71.tar.xz linux-dev-88ed01d17b44bc2bed4ad4835d3b1099bff3dd71.zip | |
netfilter: nf_conntrack: fix ct refcount leak in l4proto->error()
This patch fixes a refcount leak of ct objects that may occur if
l4proto->error() assigns one conntrack object to one skbuff. In
that case, we have to skip further processing in nf_conntrack_in().
With this patch, we can also fix wrong return values (-NF_ACCEPT)
for special cases in ICMP[v6] that should not bump the invalid/error
statistic counters.
Reported-by: Zoltan Menyhart <Zoltan.Menyhart@bull.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_conntrack_core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 0bd568929403..f7af8b866017 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -922,6 +922,9 @@ nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum, ret = -ret; goto out; } + /* ICMP[v6] protocol trackers may assign one conntrack. */ + if (skb->nfct) + goto out; } ct = resolve_normal_ct(net, tmpl, skb, dataoff, pf, protonum, |