4.14-stable review patch. If anyone has any objections, please let me know.
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From: Leon Romanovsky leonro@mellanox.com
commit 4289861d88d6c7b5e4c8cc7fe2ad6cdf0cdfc366 upstream.
The mlx5_ib_alloc_implicit_mr() can fail to acquire pages and the returned mr pointer won't be valid. Ensure that it is not error prior to access.
Cc: stable@vger.kernel.org # 4.10 Fixes: 81713d3788d2 ("IB/mlx5: Add implicit MR support") Reported-by: Noa Osherovich noaos@mellanox.com Signed-off-by: Leon Romanovsky leonro@mellanox.com Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/infiniband/hw/mlx5/mr.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1220,6 +1220,8 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct return ERR_PTR(-EINVAL);
mr = mlx5_ib_alloc_implicit_mr(to_mpd(pd), access_flags); + if (IS_ERR(mr)) + return ERR_CAST(mr); return &mr->ibmr; } #endif