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    Subject[PATCH 4.19 160/346] RDMA/cxgb4: Validate the number of CQEs
    Date
    From: Kamal Heib <kamalheib1@gmail.com>

    [ 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>
    ---
    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 1fd8798d91a73..beba761902449 100644
    --- a/drivers/infiniband/hw/cxgb4/cq.c
    +++ b/drivers/infiniband/hw/cxgb4/cq.c
    @@ -1012,6 +1012,9 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev,

    rhp = to_c4iw_dev(ibdev);

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

    --
    2.27.0


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