[PATCH rdma-next v1 3/7] RDMA/mlx5: Check CAP_NET_RAW in user namespace for flow create

[Leon Romanovsky <leon@kernel.org>]

From: Parav Pandit <parav@nvidia.com>

Currently, the capability check is done in the default
init_user_ns user namespace. When a process runs in a
non default user namespace, such check fails. Due to this
when a process is running using podman, it fails to create
the flow.

Since the RDMA device is a resource within a network namespace,
use the network namespace associated with the RDMA device to
determine its owning user namespace.

Fixes: 322694412400 ("IB/mlx5: Introduce driver create and destroy flow methods")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/hw/mlx5/fs.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/fs.c b/drivers/infiniband/hw/mlx5/fs.c
index ebcc05f766e1..774239d9efdc 100644
--- a/drivers/infiniband/hw/mlx5/fs.c
+++ b/drivers/infiniband/hw/mlx5/fs.c
@@ -2459,13 +2459,12 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_CREATE_FLOW)(
 	struct mlx5_ib_dev *dev;
 	u32 flags;
 
-	if (!capable(CAP_NET_RAW))
-		return -EPERM;
-
 	fs_matcher = uverbs_attr_get_obj(attrs,
 					 MLX5_IB_ATTR_CREATE_FLOW_MATCHER);
 	uobj =  uverbs_attr_get_uobject(attrs, MLX5_IB_ATTR_CREATE_FLOW_HANDLE);
 	dev = mlx5_udata_to_mdev(&attrs->driver_udata);
+	if (!rdma_dev_has_raw_cap(&dev->ib_dev))
+		return -EPERM;
 
 	if (get_dests(attrs, fs_matcher, &dest_id, &dest_type, &qp, &flags))
 		return -EINVAL;
-- 
2.49.0