diff options
| author |   Leon Romanovsky <leonro@mellanox.com> | 2017-01-18 14:10:30 +0200 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-02-14 10:14:25 -0500 |
| commit | 0fd27a88c2e4f548937fd7d93fc6e65c4ad7c278 (patch) | |
| tree | 030acb22c1621e984a081b4014a1c60e83fc0d34 /drivers | |
| parent | Merge tag 'mlx5-4kuar-for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux (diff) | |
| download | linux-dev-0fd27a88c2e4f548937fd7d93fc6e65c4ad7c278.tar.xz linux-dev-0fd27a88c2e4f548937fd7d93fc6e65c4ad7c278.zip | |
IB/mlx5: Fix out-of-bound access
When we initialize buffer to create SRQ in kernel,
the number of pages was less than actually used in
following mlx5_fill_page_array().
Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/srq.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c index 6f4397ee1ed6..7cb145f9a6db 100644 --- a/drivers/infiniband/hw/mlx5/srq.c +++ b/drivers/infiniband/hw/mlx5/srq.c @@ -165,8 +165,6 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, int err; int i; struct mlx5_wqe_srq_next_seg *next; - int page_shift; - int npages; err = mlx5_db_alloc(dev->mdev, &srq->db); if (err) { @@ -179,7 +177,6 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, err = -ENOMEM; goto err_db; } - page_shift = srq->buf.page_shift; srq->head = 0; srq->tail = srq->msrq.max - 1; @@ -191,10 +188,8 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, cpu_to_be16((i + 1) & (srq->msrq.max - 1)); } - npages = DIV_ROUND_UP(srq->buf.npages, 1 << (page_shift - PAGE_SHIFT)); - mlx5_ib_dbg(dev, "buf_size %d, page_shift %d, npages %d, calc npages %d\n", - buf_size, page_shift, srq->buf.npages, npages); - in->pas = mlx5_vzalloc(sizeof(*in->pas) * npages); + mlx5_ib_dbg(dev, "srq->buf.page_shift = %d\n", srq->buf.page_shift); + in->pas = mlx5_vzalloc(sizeof(*in->pas) * srq->buf.npages); if (!in->pas) { err = -ENOMEM; goto err_buf; @@ -208,7 +203,7 @@ static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, } srq->wq_sig = !!srq_signature; - in->log_page_size = page_shift - MLX5_ADAPTER_PAGE_SHIFT; + in->log_page_size = srq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT; if (MLX5_CAP_GEN(dev->mdev, cqe_version) == MLX5_CQE_VERSION_V1 && in->type == IB_SRQT_XRC) in->user_index = MLX5_IB_DEFAULT_UIDX; |