IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

In the Linux kernel, the following vulnerability has been resolved:

IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

This buffer is currently allocated in hfi1_init():

if (reinit)

ret = init_after_reset(dd);

else

ret = loadtime_init(dd);

if (ret)

goto done;

/* allocate dummy tail memory for all receive contexts */

dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev,

sizeof(u64),

&dd->rcvhdrtail_dummy_dma,

GFP_KERNEL);

if (!dd->rcvhdrtail_dummy_kvaddr) {

dd_dev_err(dd, "cannot allocate dummy tail memory\n");

ret = -ENOMEM;

goto done;

}

The reinit triggered path will overwrite the old allocation and leak it.

Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation

to hfi1_free_devdata().