From a77c0c98570dbfcd0376d115733393b3658ffff9 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 6/6] hw/display/qxl: Assert memory slot fits in preallocated
 MemoryRegion
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RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [5/5] 90eb0289592bedb0c9c087190083c85b042f8908 (jmaloy/jons-qemu-kvm)

BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
CVE: CVE-2022-4144
Upstream: Merged

commit 86fdb0582c653a9824183679403a85f588260d62
Author: Philippe Mathieu-Daudé <philmd@linaro.org>
Date:   Mon Nov 28 21:27:41 2022 +0100

    hw/display/qxl: Assert memory slot fits in preallocated MemoryRegion

    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>

(cherry picked from commit 86fdb0582c653a9824183679403a85f588260d62)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
 hw/display/qxl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 2a4b2d4158..bcd9e8716a 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1372,6 +1372,7 @@ 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;
-- 
2.37.3