netfilter: nft_quota: copy content when cloning expression

[ Upstream commit aabef97a35160461e9c576848ded737558d89055 ]

If the ruleset contains consumed quota, restore them accordingly.
Otherwise, listing after restoration shows never used items.

Restore the user-defined quota and flags too.

Fixes: ed0a0c60f0e5 ("netfilter: nft_quota: move stateful fields out of expression data")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nft_quota.c b/net/netfilter/nft_quota.c
index e6b0df6..410a5fc 100644 (file)
--- a/net/netfilter/nft_quota.c
+++ b/net/netfilter/nft_quota.c
@@ -235,12 +235,16 @@ static void nft_quota_destroy(const struct nft_ctx *ctx,
 static int nft_quota_clone(struct nft_expr *dst, const struct nft_expr *src)
 {
        struct nft_quota *priv_dst = nft_expr_priv(dst);
+       struct nft_quota *priv_src = nft_expr_priv(src);
+
+       priv_dst->quota = priv_src->quota;
+       priv_dst->flags = priv_src->flags;
 
        priv_dst->consumed = kmalloc(sizeof(*priv_dst->consumed), GFP_ATOMIC);
        if (!priv_dst->consumed)
                return -ENOMEM;
 
-       atomic64_set(priv_dst->consumed, 0);
+       *priv_dst->consumed = *priv_src->consumed;
 
        return 0;
 }