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netfilter: nf_tables: skip transaction if update object is not implemented

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[ Upstream commit 84b1a0c0140a9a92ea108576c0002210f224ce59 ]

Turn update into noop as a follow up for:

  9fedd894b4 ("netfilter: nf_tables: fix unexpected EOPNOTSUPP error")

instead of adding a transaction object which is simply discarded at a
later stage of the commit protocol.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Stable-dep-of: cddc04275f95 ("netfilter: nf_tables: must hold rcu read lock while iterating object type list")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso
2024-03-05 09:35:48 +01:00
committed by Greg Kroah-Hartman
parent 7f6f583be3
commit 7703551d0b
1 changed files with 6 additions and 2 deletions
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8
net/netfilter/nf_tables_api.c
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@@ -7313,6 +7313,9 @@ static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
if (WARN_ON_ONCE(!type))
return -ENOENT;
if (!obj->ops->update)
return 0;
nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
@@ -8972,9 +8975,10 @@ static void nft_obj_commit_update(struct nft_trans *trans)
obj = nft_trans_obj(trans);
newobj = nft_trans_obj_newobj(trans);
if (obj->ops->update)
obj->ops->update(obj, newobj);
if (WARN_ON_ONCE(!obj->ops->update))
return;
obj->ops->update(obj, newobj);
nft_obj_destroy(&trans->ctx, newobj);
}