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authorMichal Kubeček <mkubecek@suse.cz>2013-09-11 10:17:27 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2013-09-13 11:58:40 +0200
commitc13a84a830a208fb3443628773c8ca0557773cc7 (patch)
tree9d1c7a2d6e73a7bcb9af3b753eeccac73c43b47a /include/net/netfilter/nf_conntrack_extend.h
parentbnx2x: Fix configuration of doorbell block (diff)
downloadlinux-dev-c13a84a830a208fb3443628773c8ca0557773cc7.tar.xz
linux-dev-c13a84a830a208fb3443628773c8ca0557773cc7.zip
netfilter: nf_conntrack: use RCU safe kfree for conntrack extensions
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>
Diffstat (limited to 'include/net/netfilter/nf_conntrack_extend.h')
-rw-r--r--include/net/netfilter/nf_conntrack_extend.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h
index ff95434e50ca..88a1d4060d52 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. */