netdev - [PATCH net 3/5] netfilter: nf_tables: fix percpu memory leak at nf_tables

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Date:   Wed, 21 Sep 2022 09:38:23 +0200
From:   Florian Westphal <fw@...len.de>
To:     <netdev@...r.kernel.org>
Cc:     netfilter-devel@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Florian Westphal <fw@...len.de>
Subject: [PATCH net 3/5] netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()

From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>

It seems to me that percpu memory for chain stats started leaking since
commit 3bc158f8d0330f0a ("netfilter: nf_tables: map basechain priority to
hardware priority") when nft_chain_offload_priority() returned an error.

Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Fixes: 3bc158f8d0330f0a ("netfilter: nf_tables: map basechain priority to hardware priority")
Signed-off-by: Florian Westphal <fw@...len.de>
---
 net/netfilter/nf_tables_api.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index e062754dc6cc..63c70141b3e5 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2243,6 +2243,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
 		if (err < 0) {
 			nft_chain_release_hook(&hook);
 			kfree(basechain);
+			free_percpu(stats);
 			return err;
 		}
 		if (stats)
-- 
2.35.1