[PATCH 5.10 093/151] bonding: fix null pointer deref in bond_ipsec_offload_ok

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>

[ Upstream commit 95c90e4ad89d493a7a14fa200082e466e2548f9d ]

We must check if there is an active slave before dereferencing the pointer.

Fixes: 18cb261afd7b ("bonding: support hardware encryption offload to slaves")
Signed-off-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
Reviewed-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/bonding/bond_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 349f1c9dd5881..bd74b2d64ad48 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -562,6 +562,8 @@ static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
 	bond = netdev_priv(bond_dev);
 	rcu_read_lock();
 	curr_active = rcu_dereference(bond->curr_active_slave);
+	if (!curr_active)
+		goto out;
 	real_dev = curr_active->dev;
 
 	if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)
-- 
2.43.0







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