From: Jan Engelhardt <jengelh@computergmbh.de>
Date: Fri, 30 Nov 2007 13:01:50 +0000 (+1100)
Subject: [NETFILTER]: fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=67b4af297033f5f65999885542f95ba7b562848a;p=openwrt%2Fstaging%2Fblogic.git

[NETFILTER]: fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK

Fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK

When xt_CONNMARK is used outside the mangle table and the user specified
"--restore-mark", the connmark_tg_check() function will (correctly)
error out, but (incorrectly) forgets to release the L3 conntrack module.
Same for xt_CONNSECMARK.

Fix is to move the call to acquire the L3 module after the basic
constraint checks.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/net/netfilter/xt_CONNMARK.c b/net/netfilter/xt_CONNMARK.c
index 856793e8db7a..0621ca7de3b0 100644
--- a/net/netfilter/xt_CONNMARK.c
+++ b/net/netfilter/xt_CONNMARK.c
@@ -86,11 +86,6 @@ checkentry(const char *tablename,
 {
 	const struct xt_connmark_target_info *matchinfo = targinfo;
 
-	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
-		printk(KERN_WARNING "can't load conntrack support for "
-				    "proto=%d\n", target->family);
-		return false;
-	}
 	if (matchinfo->mode == XT_CONNMARK_RESTORE) {
 		if (strcmp(tablename, "mangle") != 0) {
 			printk(KERN_WARNING "CONNMARK: restore can only be "
@@ -103,6 +98,11 @@ checkentry(const char *tablename,
 		printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
 		return false;
 	}
+	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+		printk(KERN_WARNING "can't load conntrack support for "
+				    "proto=%d\n", target->family);
+		return false;
+	}
 	return true;
 }
 
diff --git a/net/netfilter/xt_CONNSECMARK.c b/net/netfilter/xt_CONNSECMARK.c
index 021b5c8d20e2..d8feba9bdb48 100644
--- a/net/netfilter/xt_CONNSECMARK.c
+++ b/net/netfilter/xt_CONNSECMARK.c
@@ -90,11 +90,6 @@ static bool checkentry(const char *tablename, const void *entry,
 {
 	const struct xt_connsecmark_target_info *info = targinfo;
 
-	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
-		printk(KERN_WARNING "can't load conntrack support for "
-				    "proto=%d\n", target->family);
-		return false;
-	}
 	switch (info->mode) {
 	case CONNSECMARK_SAVE:
 	case CONNSECMARK_RESTORE:
@@ -105,6 +100,11 @@ static bool checkentry(const char *tablename, const void *entry,
 		return false;
 	}
 
+	if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+		printk(KERN_WARNING "can't load conntrack support for "
+				    "proto=%d\n", target->family);
+		return false;
+	}
 	return true;
 }