From: Maor Gottlieb maorg@mellanox.com
commit ba80013fba656b9830ef45cd40a6a1e44707f47a upstream.
It has been discovered that this feature can globally block the RX port, so it should be allowed for highly privileged users only.
Fixes: 03404e8ae652("IB/mlx5: Add support to dropless RQ") Link: https://lore.kernel.org/r/20200322124906.1173790-1-leon@kernel.org Signed-off-by: Maor Gottlieb maorg@mellanox.com Signed-off-by: Leon Romanovsky leonro@mellanox.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/infiniband/hw/mlx5/qp.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index 4c0f0ce..4fc9278 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -5524,6 +5524,10 @@ struct ib_wq *mlx5_ib_create_wq(struct ib_pd *pd, if (udata->outlen && udata->outlen < min_resp_len) return ERR_PTR(-EINVAL);
+ if (!capable(CAP_SYS_RAWIO) && + init_attr->create_flags & IB_WQ_FLAGS_DELAY_DROP) + return ERR_PTR(-EPERM); + dev = to_mdev(pd->device); switch (init_attr->wq_type) { case IB_WQT_RQ: