mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-15 23:25:07 +00:00
Code Issues Releases Wiki Activity

net/mlx5e: Prevent possible races in VXLAN control flow

Browse source 
When calling add/remove VXLAN port, a lock must be held in order to
prevent race scenarios when more than one add/remove happens at the
same time.
Fix by holding our state_lock (mutex) as done by all other parts of the
driver.
Note that the spinlock protecting the radix-tree is still needed in
order to synchronize radix-tree access from softirq context.

Fixes: b3f63c3d5e ("net/mlx5e: Add netdev support for VXLAN tunneling")
Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Gal Pressman 2017-12-04 09:57:43 +02:00 committed by Saeed Mahameed
parent 23f4cc2cd9
commit 0c1cc8b221
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/ethernet/mellanox/mlx5/core/vxlan.c
View file

@ -88,6 +88,7 @@ static void mlx5e_vxlan_add_port(struct work_struct *work)
struct mlx5e_vxlan *vxlan;
int err;
mutex_lock(&priv->state_lock);
vxlan = mlx5e_vxlan_lookup_port(priv, port);
if (vxlan) {
atomic_inc(&vxlan->refcount);
@ -117,6 +118,7 @@ static void mlx5e_vxlan_add_port(struct work_struct *work)
err_delete_port:
mlx5e_vxlan_core_del_port_cmd(priv->mdev, port);
free_work:
mutex_unlock(&priv->state_lock);
kfree(vxlan_work);
}
@ -130,6 +132,7 @@ static void mlx5e_vxlan_del_port(struct work_struct *work)
struct mlx5e_vxlan *vxlan;
bool remove = false;
mutex_lock(&priv->state_lock);
spin_lock_bh(&vxlan_db->lock);
vxlan = radix_tree_lookup(&vxlan_db->tree, port);
if (!vxlan)
@ -147,6 +150,7 @@ static void mlx5e_vxlan_del_port(struct work_struct *work)
mlx5e_vxlan_core_del_port_cmd(priv->mdev, port);
kfree(vxlan);
}
mutex_unlock(&priv->state_lock);
kfree(vxlan_work);
}