netdev - [PATCHv2 net 1/3] bonding: add missed __rcu annotation for curr_active

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Date:   Mon, 12 Dec 2022 11:56:45 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     netdev@...r.kernel.org
Cc:     Jay Vosburgh <j.vosburgh@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Toppins <jtoppins@...hat.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>, liali <liali@...hat.com>,
        Saeed Mahameed <saeed@...nel.org>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCHv2 net 1/3] bonding: add missed __rcu annotation for curr_active_slave

There is one direct accesses to bond->curr_active_slave in
bond_miimon_commit(). Protected it by rcu_access_pointer()
since the later of this function also use this one.

Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
v2: use rcu_access_pointer() instead of rtnl_dereference().
---
 drivers/net/bonding/bond_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index b9a882f182d2..0c8a8e0edfca 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2689,7 +2689,7 @@ static void bond_miimon_commit(struct bonding *bond)
 
 			bond_miimon_link_change(bond, slave, BOND_LINK_UP);
 
-			if (!bond->curr_active_slave || slave == primary)
+			if (!rcu_access_pointer(bond->curr_active_slave) || slave == primary)
 				goto do_failover;
 
 			continue;
-- 
2.38.1