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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-14 12:47:37 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-14 12:54:45 +0200 |
| commit | 68e035c950dbceaf660144bf74054dfdfb6aad15 (patch) | |
| tree | b20a0b6e743bb5a4463f129ceb598c4b0d02f750 /net | |
| parent | f22eb25cf5b1157b29ef88c793b71972efc47143 (diff) | |
| download | blackbird-op-linux-68e035c950dbceaf660144bf74054dfdfb6aad15.tar.gz blackbird-op-linux-68e035c950dbceaf660144bf74054dfdfb6aad15.zip | |
netfilter: ctnetlink: fix missing locking while changing conntrack from nfqueue
Since 9cb017665 netfilter: add glue code to integrate nfnetlink_queue and
ctnetlink, we can modify the conntrack entry via nfnl_queue. However, the
change of the conntrack entry via nfnetlink_queue requires appropriate
locking to avoid concurrent updates.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 14f67a2cbcb5..da4fc37a8578 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1896,10 +1896,15 @@ static int ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) { struct nlattr *cda[CTA_MAX+1]; + int ret; nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); - return ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); + spin_lock_bh(&nf_conntrack_lock); + ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); + spin_unlock_bh(&nf_conntrack_lock); + + return ret; } static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
