[PATCH 5.10 188/717] RDMA/cxgb4: Validate the number of CQEs

From: Greg Kroah-Hartman
Date: Mon Dec 28 2020 - 09:08:47 EST


From: Kamal Heib <kamalheib1@xxxxxxxxx>

[ Upstream commit 6d8285e604e0221b67bd5db736921b7ddce37d00 ]

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@xxxxxxxxx
Signed-off-by: Kamal Heib <kamalheib1@xxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/cxgb4/cq.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index 28349ed508854..d6cfefc269ee3 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 -EINVAL;

+ if (entries < 1 || entries > ibdev->attrs.max_cqe)
+ return -EINVAL;
+
if (vector >= rhp->rdev.lldi.nciq)
return -EINVAL;

--
2.27.0