Hi Tadeusz, Looking at places like these: https://elixir.bootlin.com/linux/v6.0-rc5/source/drivers/infiniband/hw/qib/qib_file_ops.c#L736 https://elixir.bootlin.com/linux/v6.0-rc5/source/drivers/infiniband/hw/mlx5/main.c#L2088 I think we also need to remove VM_MAYWRITE, otherwise it's still possible to turn it into a writable mapping with mprotect. It's also probably better to return an error if VM_WRITE (or VM_EXEC?) is set rather than silently fix it up.
