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 <hagaya@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index f509dcb..f823366 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -845,6 +845,9 @@
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 @@
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,