CVE-2021-47523

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().