From: Yasuyuki Kozakai Date: Thu, 10 May 2007 21:16:24 +0000 (-0700) Subject: [NETFILTER]: nf_nat: Clears helper private area when NATing X-Git-Tag: firefly_0821_release~29184^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5d78a84913abc1b2ef1ec0c14a78ec99517cc122;p=firefly-linux-kernel-4.4.55.git [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 Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- 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);