diff --git a/hw/qxl.c b/hw/qxl.c index 00e517aaa32f957ff3218be5d53e8ddc7362d96d..e8f380bd55225bd6094adf017dcc4933cca4906f 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -37,33 +37,25 @@ */ #undef SPICE_RING_PROD_ITEM #define SPICE_RING_PROD_ITEM(qxl, r, ret) { \ - typeof(r) start = r; \ - typeof(r) end = r + 1; \ uint32_t prod = (r)->prod & SPICE_RING_INDEX_MASK(r); \ - typeof(&(r)->items[prod]) m_item = &(r)->items[prod]; \ - if (!((uint8_t*)m_item >= (uint8_t*)(start) && (uint8_t*)(m_item + 1) <= (uint8_t*)(end))) { \ + if (prod >= ARRAY_SIZE((r)->items)) { \ qxl_set_guest_bug(qxl, "SPICE_RING_PROD_ITEM indices mismatch " \ - "! %p <= %p < %p", (uint8_t *)start, \ - (uint8_t *)m_item, (uint8_t *)end); \ + "%u >= %zu", prod, ARRAY_SIZE((r)->items)); \ ret = NULL; \ } else { \ - ret = &m_item->el; \ + ret = &(r)->items[prod].el; \ } \ } #undef SPICE_RING_CONS_ITEM #define SPICE_RING_CONS_ITEM(qxl, r, ret) { \ - typeof(r) start = r; \ - typeof(r) end = r + 1; \ uint32_t cons = (r)->cons & SPICE_RING_INDEX_MASK(r); \ - typeof(&(r)->items[cons]) m_item = &(r)->items[cons]; \ - if (!((uint8_t*)m_item >= (uint8_t*)(start) && (uint8_t*)(m_item + 1) <= (uint8_t*)(end))) { \ + if (cons >= ARRAY_SIZE((r)->items)) { \ qxl_set_guest_bug(qxl, "SPICE_RING_CONS_ITEM indices mismatch " \ - "! %p <= %p < %p", (uint8_t *)start, \ - (uint8_t *)m_item, (uint8_t *)end); \ + "%u >= %zu", cons, ARRAY_SIZE((r)->items)); \ ret = NULL; \ } else { \ - ret = &m_item->el; \ + ret = &(r)->items[cons].el; \ } \ }