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netfilter: nft_flow_offload: fix underflow in flowtable reference counter 

commit 8ca79606cdfde2e37ee4f0707b9d1874a6f0eb38 upstream.

The .deactivate and .activate interfaces already deal with the reference
counter. Otherwise, this results in spurious "Device is busy" errors.

Fixes: a3c90f7a23 ("netfilter: nf_tables: flow offload expression")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
wenxu 2019-12-20 17:08:46 +08:00 committed by Greg Kroah-Hartman
parent 23d7750ec8
commit 54c396574b
1 changed files with 0 additions and 3 deletions
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3
net/netfilter/nft_flow_offload.c
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@ -197,9 +197,6 @@ static void nft_flow_offload_activate(const struct nft_ctx *ctx,
static void nft_flow_offload_destroy(const struct nft_ctx *ctx,
const struct nft_expr *expr)
{
struct nft_flow_offload *priv = nft_expr_priv(expr);
priv->flowtable->use--;
nf_ct_netns_put(ctx->net, ctx->family);
}