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authorYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>2007-05-10 14:16:24 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-05-10 23:47:48 -0700
commit5d78a84913abc1b2ef1ec0c14a78ec99517cc122 (patch)
tree9b82e98f371ea2d9db40028ed473fc39ddbfbdee /net
parentdf293bbb6ff80f40a2308140ba4cbc2d3c1b18da (diff)
downloadlinux-5d78a84913abc1b2ef1ec0c14a78ec99517cc122.tar.bz2
[NETFILTER]: nf_nat: Clears helper private area when NATing
Some helpers (eg. ftp) assume that private area in conntrack is filled with zero. It should be cleared when helper is changed. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_core.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 94000a4c7dcf..e8b5c2d7db62 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -888,8 +888,13 @@ void nf_conntrack_alter_reply(struct nf_conn *ct,
NF_CT_DUMP_TUPLE(newreply);
ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
- if (!ct->master && help && help->expecting == 0)
- help->helper = __nf_ct_helper_find(newreply);
+ if (!ct->master && help && help->expecting == 0) {
+ struct nf_conntrack_helper *helper;
+ helper = __nf_ct_helper_find(newreply);
+ if (helper)
+ memset(&help->help, 0, sizeof(help->help));
+ help->helper = helper;
+ }
write_unlock_bh(&nf_conntrack_lock);
}
EXPORT_SYMBOL_GPL(nf_conntrack_alter_reply);