linux-kernel - [PATCH 2.6.19-rc6] netfilter: fix panic on ip_conntrack_h323 with CONFIG_IP_NF_CT

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Message-ID: <20061120193931.GA9913@void.cube.gr>
Date:	Mon, 20 Nov 2006 21:39:31 +0200
From:	Faidon Liambotis <paravoid@...ian.org>
To:	coreteam@...filter.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...nel.org
Subject: [PATCH 2.6.19-rc6] netfilter: fix panic on ip_conntrack_h323 with CONFIG_IP_NF_CT_ACCT

H.323 connection tracking code calls ip_ct_refresh_acct() when
processing RCFs and URQs but passes NULL as the skb.
When CONFIG_IP_NF_CT_ACCT is enabled, the connection tracking core tries
to derefence the skb, which results in an obvious panic.
ago.

The patch uses ip_ct_refresh() instead of ip_ct_refresh_acct() to avoid
double accounting (suggested by Patrick McHardy).

Signed-off-by: Faidon Liambotis <paravoid@...ian.org>

--- a/net/ipv4/netfilter/ip_conntrack_helper_h323.c	2006-11-15 19:07:50.000000000 +0200
+++ b/net/ipv4/netfilter/ip_conntrack_helper_h323.c	2006-11-16 11:09:46.000000000 +0200
@@ -1417,7 +1417,7 @@ static int process_rcf(struct sk_buff **
 		DEBUGP
 		    ("ip_ct_ras: set RAS connection timeout to %u seconds\n",
 		     info->timeout);
-		ip_ct_refresh_acct(ct, ctinfo, NULL, info->timeout * HZ);
+		ip_ct_refresh(ct, *pskb, info->timeout * HZ);
 
 		/* Set expect timeout */
 		read_lock_bh(&ip_conntrack_lock);
@@ -1465,7 +1465,7 @@ static int process_urq(struct sk_buff **
 	info->sig_port[!dir] = 0;
 
 	/* Give it 30 seconds for UCF or URJ */
-	ip_ct_refresh_acct(ct, ctinfo, NULL, 30 * HZ);
+	ip_ct_refresh(ct, *pskb, 30 * HZ);
 
 	return 0;
 }
-
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