4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Leon Romanovsky <[email protected]> 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: <[email protected]> # 4.10 Fixes: 81713d3788d2 ("IB/mlx5: Add implicit MR support") Reported-by: Noa Osherovich <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Doug Ledford <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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
