Patch "netfilter: nft_connlimit: move stateful fields out of expression data" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    netfilter: nft_connlimit: move stateful fields out of expression data

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     netfilter-nft_connlimit-move-stateful-fields-out-of-.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7a8d95762229678a78a12e22bacdc27eba953e9e
Author: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date:   Sun Jan 9 17:11:13 2022 +0100

    netfilter: nft_connlimit: move stateful fields out of expression data
    
    [ Upstream commit 37f319f37d9005693dff085bb72852eeebc803ef ]
    
    In preparation for the rule blob representation.
    
    Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
    Stable-dep-of: 91a139cee120 ("netfilter: nft_limit: do not ignore unsupported flags")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/netfilter/nft_connlimit.c b/net/netfilter/nft_connlimit.c
index 7d0761fad37e..58dcafe8bf79 100644
--- a/net/netfilter/nft_connlimit.c
+++ b/net/netfilter/nft_connlimit.c
@@ -14,7 +14,7 @@
 #include <net/netfilter/nf_conntrack_zones.h>
 
 struct nft_connlimit {
-	struct nf_conncount_list	list;
+	struct nf_conncount_list	*list;
 	u32				limit;
 	bool				invert;
 };
@@ -43,12 +43,12 @@ static inline void nft_connlimit_do_eval(struct nft_connlimit *priv,
 		return;
 	}
 
-	if (nf_conncount_add(nft_net(pkt), &priv->list, tuple_ptr, zone)) {
+	if (nf_conncount_add(nft_net(pkt), priv->list, tuple_ptr, zone)) {
 		regs->verdict.code = NF_DROP;
 		return;
 	}
 
-	count = priv->list.count;
+	count = priv->list->count;
 
 	if ((count > priv->limit) ^ priv->invert) {
 		regs->verdict.code = NFT_BREAK;
@@ -76,7 +76,11 @@ static int nft_connlimit_do_init(const struct nft_ctx *ctx,
 			invert = true;
 	}
 
-	nf_conncount_list_init(&priv->list);
+	priv->list = kmalloc(sizeof(*priv->list), GFP_KERNEL);
+	if (!priv->list)
+		return -ENOMEM;
+
+	nf_conncount_list_init(priv->list);
 	priv->limit	= limit;
 	priv->invert	= invert;
 
@@ -87,7 +91,8 @@ static void nft_connlimit_do_destroy(const struct nft_ctx *ctx,
 				     struct nft_connlimit *priv)
 {
 	nf_ct_netns_put(ctx->net, ctx->family);
-	nf_conncount_cache_free(&priv->list);
+	nf_conncount_cache_free(priv->list);
+	kfree(priv->list);
 }
 
 static int nft_connlimit_do_dump(struct sk_buff *skb,
@@ -200,7 +205,11 @@ static int nft_connlimit_clone(struct nft_expr *dst, const struct nft_expr *src)
 	struct nft_connlimit *priv_dst = nft_expr_priv(dst);
 	struct nft_connlimit *priv_src = nft_expr_priv(src);
 
-	nf_conncount_list_init(&priv_dst->list);
+	priv_dst->list = kmalloc(sizeof(*priv_dst->list), GFP_ATOMIC);
+	if (priv_dst->list)
+		return -ENOMEM;
+
+	nf_conncount_list_init(priv_dst->list);
 	priv_dst->limit	 = priv_src->limit;
 	priv_dst->invert = priv_src->invert;
 
@@ -212,7 +221,8 @@ static void nft_connlimit_destroy_clone(const struct nft_ctx *ctx,
 {
 	struct nft_connlimit *priv = nft_expr_priv(expr);
 
-	nf_conncount_cache_free(&priv->list);
+	nf_conncount_cache_free(priv->list);
+	kfree(priv->list);
 }
 
 static bool nft_connlimit_gc(struct net *net, const struct nft_expr *expr)
@@ -221,7 +231,7 @@ static bool nft_connlimit_gc(struct net *net, const struct nft_expr *expr)
 	bool ret;
 
 	local_bh_disable();
-	ret = nf_conncount_gc_list(net, &priv->list);
+	ret = nf_conncount_gc_list(net, priv->list);
 	local_bh_enable();
 
 	return ret;