netfilter: nf_tables_offload: skip EBUSY on chain update

[ Upstream commit 88c749840dff58e7a40e18bf9bdace15f27ef259 ]

Do not try to bind a chain again if it exists, otherwise the driver
returns EBUSY.

Fixes: c9626a2cbdb2 ("netfilter: nf_tables: add hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index c0d18c1d77ac05e0c9b1f98a33f2e18616bc3add..04fbab60e80808a2977142fdc916504415bfc63a 100644 (file)
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -241,7 +241,8 @@ int nft_flow_rule_offload_commit(struct net *net)
 
                switch (trans->msg_type) {
                case NFT_MSG_NEWCHAIN:
-                       if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
+                       if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD) ||
+                           nft_trans_chain_update(trans))
                                continue;
 
                        err = nft_flow_offload_chain(trans, FLOW_BLOCK_BIND);