From ba80013fba656b9830ef45cd40a6a1e44707f47a Mon Sep 17 00:00:00 2001
From: Maor Gottlieb <maorg@mellanox.com>
Date: Sun, 22 Mar 2020 14:49:06 +0200
Subject: [PATCH 1/1] RDMA/mlx5: Block delay drop to unprivileged users
Git-commit: ba80013fba656b9830ef45cd40a6a1e44707f47a
Patch-mainline: v5.6
References: git-fixes
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>
Acked-by: Nicolas Morey <nmorey@suse.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 c2967982f02c..8fe149e808af 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -6205,6 +6205,10 @@ 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:
--
2.39.1.1.gbe015eda0162