File hw-display-qxl-Assert-memory-slot-fits-i.patch of Package qemu.30222

From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
Date: Mon, 28 Nov 2022 21:27:41 +0100
Subject: hw/display/qxl: Assert memory slot fits in preallocated MemoryRegion
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Git-commit: 86fdb0582c653a9824183679403a85f588260d62
References: bsc#1205808, CVE-2022-4144

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20221128202741.4945-6-philmd@linaro.org>
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
---
 hw/display/qxl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index c51b0cd6c6f717a3f437ea0531c5..eaf10248742d17ad717ca6d51ea6 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1404,6 +1404,7 @@ 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;