linux-kernel - [PATCH 5.13 424/800] mptcp: fix pr_debug in mptcp_token_new

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Message-Id: <20210712061012.255088225@linuxfoundation.org>
Date:   Mon, 12 Jul 2021 08:07:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        Jianguo Wu <wujianguo@...natelecom.cn>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 424/800] mptcp: fix pr_debug in mptcp_token_new_connect

From: Jianguo Wu <wujianguo@...natelecom.cn>

[ Upstream commit 2f1af441fd5dd5caf0807bb19ce9bbf9325ce534 ]

After commit 2c5ebd001d4f ("mptcp: refactor token container"),
pr_debug() is called before mptcp_crypto_key_gen_sha() in
mptcp_token_new_connect(), so the output local_key, token and
idsn are 0, like:

  MPTCP: ssk=00000000f6b3c4a2, local_key=0, token=0, idsn=0

Move pr_debug() after mptcp_crypto_key_gen_sha().

Fixes: 2c5ebd001d4f ("mptcp: refactor token container")
Acked-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Jianguo Wu <wujianguo@...natelecom.cn>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/mptcp/token.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/mptcp/token.c b/net/mptcp/token.c
index 8f0270a780ce..72a24e63b131 100644
--- a/net/mptcp/token.c
+++ b/net/mptcp/token.c
@@ -156,9 +156,6 @@ int mptcp_token_new_connect(struct sock *sk)
 	int retries = TOKEN_MAX_RETRIES;
 	struct token_bucket *bucket;
 
-	pr_debug("ssk=%p, local_key=%llu, token=%u, idsn=%llu\n",
-		 sk, subflow->local_key, subflow->token, subflow->idsn);
-
 again:
 	mptcp_crypto_key_gen_sha(&subflow->local_key, &subflow->token,
 				 &subflow->idsn);
@@ -172,6 +169,9 @@ again:
 		goto again;
 	}
 
+	pr_debug("ssk=%p, local_key=%llu, token=%u, idsn=%llu\n",
+		 sk, subflow->local_key, subflow->token, subflow->idsn);
+
 	WRITE_ONCE(msk->token, subflow->token);
 	__sk_nulls_add_node_rcu((struct sock *)msk, &bucket->msk_chain);
 	bucket->chain_len++;
-- 
2.30.2