RDMA/rxe: Verify modify_device mask

Verify that the passed mask to rxe_modify_device() is supported.

Link: https://lore.kernel.org/r/20190923104158.5331-4-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index 623129f..fa47bdc 100644 (file)
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -106,6 +106,10 @@ static int rxe_modify_device(struct ib_device *dev,
 {
        struct rxe_dev *rxe = to_rdev(dev);
 
+       if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+                    IB_DEVICE_MODIFY_NODE_DESC))
+               return -EOPNOTSUPP;
+
        if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
                rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);