diff options
| author | Jarod Wilson <jarod@redhat.com> | 2020-07-08 18:58:49 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-08 16:09:07 -0700 |
| commit | f548a476268d621846bb0146af861bb56250ae37 (patch) | |
| tree | 1b132abdeeaf1e946b7a9b2eaba90c0d36c02759 | |
| parent | 7d25e14eb2c0f07d10815a524542cdf681cb472c (diff) | |
bonding: don't need RTNL for ipsec helpers
The bond_ipsec_* helpers don't need RTNL, and can potentially get called
without it being held, so switch from rtnl_dereference() to
rcu_dereference() to access bond struct data.
Lightly tested with xfrm bonding, no problems found, should address the
syzkaller bug referenced below.
Reported-by: syzbot+582c98032903dcc04816@syzkaller.appspotmail.com
CC: Huy Nguyen <huyn@mellanox.com>
CC: Saeed Mahameed <saeedm@mellanox.com>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Steffen Klassert <steffen.klassert@secunet.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: netdev@vger.kernel.org
CC: intel-wired-lan@lists.osuosl.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index f886d97c4359..e2d491c4378c 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -390,7 +390,7 @@ static int bond_ipsec_add_sa(struct xfrm_state *xs) return -EINVAL; bond = netdev_priv(bond_dev); - slave = rtnl_dereference(bond->curr_active_slave); + slave = rcu_dereference(bond->curr_active_slave); xs->xso.real_dev = slave->dev; bond->xs = xs; @@ -417,7 +417,7 @@ static void bond_ipsec_del_sa(struct xfrm_state *xs) return; bond = netdev_priv(bond_dev); - slave = rtnl_dereference(bond->curr_active_slave); + slave = rcu_dereference(bond->curr_active_slave); if (!slave) return; @@ -442,7 +442,7 @@ static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) { struct net_device *bond_dev = xs->xso.dev; struct bonding *bond = netdev_priv(bond_dev); - struct slave *curr_active = rtnl_dereference(bond->curr_active_slave); + struct slave *curr_active = rcu_dereference(bond->curr_active_slave); struct net_device *slave_dev = curr_active->dev; if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) |