From 9641b74ebee65320fa52172995d6df12b641caa5 Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Wed, 23 Oct 2013 09:53:15 +0300 Subject: [PATCH] IB/mlx5: Fix overflow check in IB_WR_FAST_REG_MR Make sure not to overflow when reading the page list from struct ib_fast_reg_page_list. Signed-off-by: Eli Cohen Signed-off-by: Roland Dreier --- drivers/infiniband/hw/mlx5/qp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index e388143..8a36fd7 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -1915,6 +1915,10 @@ static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size, if (unlikely((*seg == qp->sq.qend))) *seg = mlx5_get_send_wqe(qp, 0); if (!li) { + if (unlikely(wr->wr.fast_reg.page_list_len > + wr->wr.fast_reg.page_list->max_page_list_len)) + return -ENOMEM; + set_frwr_pages(*seg, wr, mdev, pd, writ); *seg += sizeof(struct mlx5_wqe_data_seg); *size += (sizeof(struct mlx5_wqe_data_seg) / 16); -- 2.7.4