From: Haggai Abramovsky Date: Thu, 14 Jan 2016 17:12:56 +0000 (+0200) Subject: IB/mlx5: Fix data validation in mlx5_ib_alloc_ucontext X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dfbee8598d24668b882bcc97d28d5108441cc88a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IB/mlx5: Fix data validation in mlx5_ib_alloc_ucontext The wrong buffer size was passed to ib_is_udata_cleared. Signed-off-by: Haggai Abramovsky Reviewed-by: Matan Barak Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index f509dcb85665..f82336699c3e 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -845,6 +845,9 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, if (!dev->ib_active) return ERR_PTR(-EAGAIN); + if (udata->inlen < sizeof(struct ib_uverbs_cmd_hdr)) + return ERR_PTR(-EINVAL); + reqlen = udata->inlen - sizeof(struct ib_uverbs_cmd_hdr); if (reqlen == sizeof(struct mlx5_ib_alloc_ucontext_req)) ver = 0; @@ -871,7 +874,7 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, if (reqlen > sizeof(req) && !ib_is_udata_cleared(udata, sizeof(req), - udata->inlen - sizeof(req))) + reqlen - sizeof(req))) return ERR_PTR(-EOPNOTSUPP); req.total_num_uuars = ALIGN(req.total_num_uuars,