diff options
| author |   Pablo Neira Ayuso <pablo@netfilter.org> | 2007-08-07 18:11:26 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2007-08-07 18:11:26 -0700 |
| commit | ff4ca8273eafbba875a86d333e059e78f292107f (patch) | |
| tree | 71a484c1dbd7560b570b5072abf3ef014062f686 /net/netfilter | |
| parent | [NETFILTER]: ipt_recent: avoid a possible NULL pointer deref in recent_seq_open() (diff) | |
| download | linux-dev-ff4ca8273eafbba875a86d333e059e78f292107f.tar.xz linux-dev-ff4ca8273eafbba875a86d333e059e78f292107f.zip | |
[NETFILTER]: ctnetlink: return EEXIST instead of EINVAL for existing nat'ed conntracks
ctnetlink must return EEXIST for existing nat'ed conntracks instead of
EINVAL. Only return EINVAL if we try to update a conntrack with NAT
handlings (that is not allowed).
Decadence:libnetfilter_conntrack/utils# ./conntrack_create_nat
TEST: create conntrack (0)(Success)
Decadence:libnetfilter_conntrack/utils# ./conntrack_create_nat
TEST: create conntrack (-1)(Invalid argument)
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 6f89b105a205..2863e72b4091 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1052,17 +1052,18 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, } /* implicit 'else' */ - /* we only allow nat config for new conntracks */ - if (cda[CTA_NAT_SRC-1] || cda[CTA_NAT_DST-1]) { - err = -EINVAL; - goto out_unlock; - } - /* We manipulate the conntrack inside the global conntrack table lock, * so there's no need to increase the refcount */ err = -EEXIST; - if (!(nlh->nlmsg_flags & NLM_F_EXCL)) - err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), cda); + if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { + /* we only allow nat config for new conntracks */ + if (cda[CTA_NAT_SRC-1] || cda[CTA_NAT_DST-1]) { + err = -EINVAL; + goto out_unlock; + } + err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), + cda); + } out_unlock: write_unlock_bh(&nf_conntrack_lock); |