diff options
| author | Michal Kubecek <mkubecek@suse.cz> | 2013-09-11 10:17:27 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 10:57:35 -0800 |
| commit | 78ab8cbc11ee095ec27d7f6edde91e2c3af1540d (patch) | |
| tree | 950a8a36850f05a2c0acbbbbe98438c7c323f5cf | |
| parent | a1daae5dbf42e8f4446c122a63a24fdb8b2c854b (diff) | |
netfilter: nf_conntrack: use RCU safe kfree for conntrack extensions
commit c13a84a830a208fb3443628773c8ca0557773cc7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/net/netfilter/nf_conntrack_extend.h | 2 |
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 977bc8a4644..331310851cf 100644 --- a/include/net/netfilter/nf_conntrack_extend.h +++ b/include/net/netfilter/nf_conntrack_extend.h @@ -80,7 +80,7 @@ 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. */ |