From: Kamal Heib <kamalheib1@gmail.com>
Date: Sun, 8 Nov 2020 13:20:07 +0000 (+0200)
Subject: RDMA/cxgb4: Validate the number of CQEs
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6d8285e604e0221b67bd5db736921b7ddce37d00;p=linux.git

RDMA/cxgb4: Validate the number of CQEs

Before create CQ, make sure that the requested number of CQEs is in the
supported range.

Fixes: cfdda9d76436 ("RDMA/cxgb4: Add driver for Chelsio T4 RNIC")
Link: https://lore.kernel.org/r/20201108132007.67537-1-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---

diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index 2cb65be24770f..44c2416588d42 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -1008,6 +1008,9 @@ int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	if (attr->flags)
 		return -EOPNOTSUPP;
 
+	if (entries < 1 || entries > ibdev->attrs.max_cqe)
+		return -EINVAL;
+
 	if (vector >= rhp->rdev.lldi.nciq)
 		return -EINVAL;