RDMA/cxgb4: Validate the number of CQEs

[ 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@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index 6b15508ce17e742e812e439fdb0d7fb63eb9841d..24d4c9d9a4eeb4422e0e3ee13b6be445c2ed6b88 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -906,6 +906,9 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,
 
        rhp = to_c4iw_dev(ibdev);
 
+       if (entries < 1 || entries > ibdev->attrs.max_cqe)
+               return ERR_PTR(-EINVAL);
+
        if (vector >= rhp->rdev.lldi.nciq)
                return ERR_PTR(-EINVAL);