This is a note to let you know that I've just added the patch titled IB/mlx5: Fix out-of-bound access to the 4.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ib-mlx5-fix-out-of-bound-access.patch and it can be found in the queue-4.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 0fd27a88c2e4f548937fd7d93fc6e65c4ad7c278 Mon Sep 17 00:00:00 2001 From: Leon Romanovsky <leonro@xxxxxxxxxxxx> Date: Wed, 18 Jan 2017 14:10:30 +0200 Subject: IB/mlx5: Fix out-of-bound access From: Leon Romanovsky <leonro@xxxxxxxxxxxx> commit 0fd27a88c2e4f548937fd7d93fc6e65c4ad7c278 upstream. 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") Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx> Reviewed-by: Eli Cohen <eli@xxxxxxxxxxxx> Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/infiniband/hw/mlx5/srq.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) --- 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 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 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 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 } 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; Patches currently in stable-queue which might be from leonro@xxxxxxxxxxxx are queue-4.10/ib-srp-avoid-that-duplicate-responses-trigger-a-kernel-bug.patch queue-4.10/ib-mlx5-fix-out-of-bound-access.patch queue-4.10/ib-srp-avoid-using-ib_mr_type_sg_gaps.patch