4.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Roi Dayan <roid@xxxxxxxxxxxx>
[ Upstream commit 38e8a5c040d3ec99a8351c688dcdf0f549611565 ]
When cleaning rdma netdevice we need to save the mdev pointer
because priv is released when we release netdev.
This bug was found using the kernel address sanitizer (KASAN).
use-after-free in mlx5_rdma_netdev_free+0xe3/0x100 [mlx5_core]
Fixes: 48935bbb7ae8 ("net/mlx5e: IPoIB, Add netdevice profile skeleton")
Signed-off-by: Roi Dayan <roid@xxxxxxxxxxxx>
Reviewed-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
@@ -572,12 +572,13 @@ void mlx5_rdma_netdev_free(struct net_de
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
const struct mlx5e_profile *profile = priv->profile;
+ struct mlx5_core_dev *mdev = priv->mdev;
mlx5e_detach_netdev(priv);
profile->cleanup(priv);
destroy_workqueue(priv->wq);
free_netdev(netdev);
- mlx5e_destroy_mdev_resources(priv->mdev);
+ mlx5e_destroy_mdev_resources(mdev);
}
EXPORT_SYMBOL(mlx5_rdma_netdev_free);