diff options
| author | Ido Schimmel <idosch@mellanox.com> | 2020-07-29 12:26:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-05 10:59:47 +0300 |
| commit | 57f498ced73160972866120ce3b021218353e0d4 (patch) | |
| tree | 5df691e383645747bccef7a009de30be10c0f7f3 | |
| parent | 0f424eda470530a070fb0a4e9e868770022f3c86 (diff) | |
| download | linux-57f498ced73160972866120ce3b021218353e0d4.tar.xz | |
mlxsw: core: Increase scope of RCU read-side critical section
[ Upstream commit 7d8e8f3433dc8d1dc87c1aabe73a154978fb4c4d ]
The lifetime of the Rx listener item ('rxl_item') is managed using RCU,
but is dereferenced outside of RCU read-side critical section, which can
lead to a use-after-free.
Fix this by increasing the scope of the RCU read-side critical section.
Fixes: 93c1edb27f9e ("mlxsw: Introduce Mellanox switch driver core")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c index 1b204ce30ee4..506bcdc32a8d 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core.c @@ -1802,11 +1802,13 @@ void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, break; } } - rcu_read_unlock(); - if (!found) + if (!found) { + rcu_read_unlock(); goto drop; + } rxl->func(skb, local_port, rxl_item->priv); + rcu_read_unlock(); return; drop: |