linux-kernel - [MPTCP][PATCH net 2/2] mptcp: cleanup for mptcp_pm_alloc_anno

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Date:   Mon,  9 Nov 2020 21:59:22 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Geliang Tang <geliangtang@...il.com>, netdev@...r.kernel.org,
        mptcp@...ts.01.org, linux-kernel@...r.kernel.org,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [MPTCP][PATCH net 2/2] mptcp: cleanup for mptcp_pm_alloc_anno_list

This patch added NULL pointer check for mptcp_pm_alloc_anno_list, and
avoided similar static checker warnings in mptcp_pm_add_timer.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 net/mptcp/pm_netlink.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 03f2c28f11f5..dfc1bed4a55f 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -266,7 +266,9 @@ static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
 {
 	struct mptcp_pm_add_entry *add_entry = NULL;
 	struct sock *sk = (struct sock *)msk;
-	struct net *net = sock_net(sk);
+
+	if (!msk)
+		return false;
 
 	if (lookup_anno_list_by_saddr(msk, &entry->addr))
 		return false;
@@ -283,7 +285,7 @@ static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
 
 	timer_setup(&add_entry->add_timer, mptcp_pm_add_timer, 0);
 	sk_reset_timer(sk, &add_entry->add_timer,
-		       jiffies + mptcp_get_add_addr_timeout(net));
+		       jiffies + mptcp_get_add_addr_timeout(sock_net(sk)));
 
 	return true;
 }
-- 
2.26.2