diff options
author | Gao Feng <fgao@ikuai8.com> | 2016-09-13 08:49:18 +0800 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-09-13 10:50:56 +0200 |
commit | 4440a2ab3b9f40dddbe006331ef0659c76859296 (patch) | |
tree | 0fd1a6441ee46cc957ec089b158af8ca0efa90f8 /include/net/netfilter | |
parent | ecfcdfec7e0cc64215a194044305f02a5a836e6d (diff) | |
download | op-kernel-dev-4440a2ab3b9f40dddbe006331ef0659c76859296.zip op-kernel-dev-4440a2ab3b9f40dddbe006331ef0659c76859296.tar.gz |
netfilter: synproxy: Check oom when adding synproxy and seqadj ct extensions
When memory is exhausted, nfct_seqadj_ext_add may fail to add the
synproxy and seqadj extensions. The function nf_ct_seqadj_init doesn't
check if get valid seqadj pointer by the nfct_seqadj.
Now drop the packet directly when fail to add seqadj extension to
avoid dereference NULL pointer in nf_ct_seqadj_init from
init_conntrack().
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net/netfilter')
-rw-r--r-- | include/net/netfilter/nf_conntrack_synproxy.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_synproxy.h b/include/net/netfilter/nf_conntrack_synproxy.h index 6793614..e693731 100644 --- a/include/net/netfilter/nf_conntrack_synproxy.h +++ b/include/net/netfilter/nf_conntrack_synproxy.h @@ -27,6 +27,20 @@ static inline struct nf_conn_synproxy *nfct_synproxy_ext_add(struct nf_conn *ct) #endif } +static inline bool nf_ct_add_synproxy(struct nf_conn *ct, + const struct nf_conn *tmpl) +{ + if (tmpl && nfct_synproxy(tmpl)) { + if (!nfct_seqadj_ext_add(ct)) + return false; + + if (!nfct_synproxy_ext_add(ct)) + return false; + } + + return true; +} + struct synproxy_stats { unsigned int syn_received; unsigned int cookie_invalid; |