From a46bd53829bd1af85e4d47598afa716700bc4d1e Mon Sep 17 00:00:00 2001 From: Maor Gottlieb Date: Sun, 22 Mar 2020 14:49:06 +0200 Subject: [PATCH] RDMA/mlx5: Block delay drop to unprivileged users 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 Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- 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 65d53bacecab6..c8fca27a1ff4d 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -6158,6 +6158,10 @@ 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: -- 2.47.2