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netfilter: nft_quota: copy content when cloning expression

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commit aabef97a35 upstream.

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: ed0a0c60f0 ("netfilter: nft_quota: move stateful fields out of expression data")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso 2023-02-28 20:43:02 +01:00 committed by Greg Kroah-Hartman
parent 3be3c61232
commit 98052220f1
1 changed files with 5 additions and 1 deletions
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6
net/netfilter/nft_quota.c
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@ -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;
}