From: wenxu <wenxu@ucloud.cn>
Date: Fri, 20 Dec 2019 09:08:46 +0000 (+0800)
Subject: netfilter: nft_flow_offload: fix underflow in flowtable reference counter
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=8ca79606cdfde2e37ee4f0707b9d1874a6f0eb38;p=uclinux-h8%2Flinux.git

netfilter: nft_flow_offload: fix underflow in flowtable reference counter

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

Fixes: a3c90f7a2323 ("netfilter: nf_tables: flow offload expression")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index dd82ff2ee19f..b70b48996801 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -200,9 +200,6 @@ 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);
 }