From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 1/7] netfilter: nf_conntrack: use RCU safe kfree for conntrack extensions
Date: Wed, 18 Sep 2013 00:07:28 +0200 [thread overview]
Message-ID: <1379455654-3905-2-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1379455654-3905-1-git-send-email-pablo@netfilter.org>
From: Michal Kubeček <mkubecek@suse.cz>
Commit 68b80f11 (netfilter: nf_nat: fix RCU races) introduced
RCU protection for freeing extension data when reallocation
moves them to a new location. We need the same protection when
freeing them in nf_ct_ext_free() in order to prevent a
use-after-free by other threads referencing a NAT extension data
via bysource list.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
include/net/netfilter/nf_conntrack_extend.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h
index ff95434..88a1d40 100644
--- a/include/net/netfilter/nf_conntrack_extend.h
+++ b/include/net/netfilter/nf_conntrack_extend.h
@@ -86,7 +86,7 @@ static inline void nf_ct_ext_destroy(struct nf_conn *ct)
static inline void nf_ct_ext_free(struct nf_conn *ct)
{
if (ct->ext)
- kfree(ct->ext);
+ kfree_rcu(ct->ext, rcu);
}
/* Add this type, returns pointer to data or NULL. */
--
1.7.10.4
--
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next prev parent reply other threads:[~2013-09-17 22:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-17 22:07 [PATCH 0/7] netfilter fixes for net Pablo Neira Ayuso
2013-09-17 22:07 ` Pablo Neira Ayuso [this message]
2013-09-17 22:07 ` [PATCH 2/7] netfilter: nf_nat_proto_icmpv6:: fix wrong comparison in icmpv6_manip_pkt Pablo Neira Ayuso
2013-09-17 22:07 ` [PATCH 3/7] netfilter: ipset: Skip really non-first fragments for IPv6 when getting port/protocol Pablo Neira Ayuso
2013-09-17 22:07 ` [PATCH 4/7] netfilter: ipset: Consistent userspace testing with nomatch flag Pablo Neira Ayuso
2013-09-17 22:07 ` [PATCH 5/7] netfilter: ipset: Validate the set family and not the set type family at swapping Pablo Neira Ayuso
2013-09-17 22:07 ` [PATCH 6/7] netfilter: ipset: Fix serious failure in CIDR tracking Pablo Neira Ayuso
2013-09-17 22:07 ` [PATCH 7/7] netfilter: nfnetlink_queue: use network skb for sequence adjustment Pablo Neira Ayuso
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