diff --git a/reactos/drivers/usb/nt4compat/usbdriver/ehci.c b/reactos/drivers/usb/nt4compat/usbdriver/ehci.c index bb807b22b81..5fbabe6ee43 100644 --- a/reactos/drivers/usb/nt4compat/usbdriver/ehci.c +++ b/reactos/drivers/usb/nt4compat/usbdriver/ehci.c @@ -1573,6 +1573,7 @@ ehci_internal_submit_bulk(PEHCI_DEV ehci, PURB purb) PEHCI_QTD_CONTENT ptdc; PEHCI_QH_CONTENT pqhc; PEHCI_ELEM_LINKS pelnk; + PEHCI_ELEM_LINKS plnk; if (ehci == NULL || purb == NULL) return STATUS_INVALID_PARAMETER; @@ -1685,7 +1686,17 @@ ehci_internal_submit_bulk(PEHCI_DEV ehci, PURB purb) RemoveEntryList(&td_list); elem_pool_lock(qh_pool, TRUE); - pqh = (PEHCI_QH) ((ULONG) elem_pool_alloc_elem(qh_pool)->phys_part & PHYS_PART_ADDR_MASK); + + plnk = elem_pool_alloc_elem(qh_pool); + if (plnk == NULL) + { + // free the qtds + elem_safe_free(pthis, TRUE); + if (qh_pool) elem_pool_unlock(qh_pool, TRUE); + return STATUS_UNSUCCESSFUL; + } + + pqh = (PEHCI_QH) ((ULONG) plnk->phys_part & PHYS_PART_ADDR_MASK); elem_pool_unlock(qh_pool, TRUE); if (pqh == NULL)