diff mbox series

[PATCH-for-8.0,5/5] hw/display/qxl: Assert memory slot fits in preallocated MemoryRegion

Message ID 20221128134832.84867-6-philmd@linaro.org
State Superseded
Headers show
Series hw/display/qxl: Avoid buffer overrun in qxl_phys2virt() | expand

Commit Message

Philippe Mathieu-Daudé Nov. 28, 2022, 1:48 p.m. UTC 
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/display/qxl.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index afa157d327..8468513f41 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1384,6 +1384,7 @@  static int qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
         qxl_set_guest_bug(d, "%s: pci_region = %d", __func__, pci_region);
         return 1;
     }
+    assert(guest_end - pci_start <= memory_region_size(mr));
 
     virt_start = (intptr_t)memory_region_get_ram_ptr(mr);
     memslot.slot_id = slot_id;