From 5ec8d909d40fa04ef2c3572e01509a1866786070 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 1/5] hw/display/qxl: Have qxl_log_command Return early if no
 log_cmd handler
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RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [1/5] 33d94f40c46cccbc32d108d1035365917bf90356 (jmaloy/jons-qemu-kvm)

BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

commit 61c34fc194b776ecadc39fb26b061331107e5599
Author: Philippe Mathieu-Daudé <philmd@linaro.org>
Date:   Mon Nov 28 21:27:37 2022 +0100

    hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler

    Only 3 command types are logged: no need to call qxl_phys2virt()
    for the other types. Using different cases will help to pass
    different structure sizes to qxl_phys2virt() in a pair of commits.

    Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
    Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
    Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
    Message-Id: <20221128202741.4945-2-philmd@linaro.org>

(cherry picked from commit 61c34fc194b776ecadc39fb26b061331107e5599)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
 hw/display/qxl-logger.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/display/qxl-logger.c b/hw/display/qxl-logger.c
index 68bfa47568..1bcf803db6 100644
--- a/hw/display/qxl-logger.c
+++ b/hw/display/qxl-logger.c
@@ -247,6 +247,16 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
             qxl_name(qxl_type, ext->cmd.type),
             compat ? "(compat)" : "");
 
+    switch (ext->cmd.type) {
+    case QXL_CMD_DRAW:
+        break;
+    case QXL_CMD_SURFACE:
+        break;
+    case QXL_CMD_CURSOR:
+        break;
+    default:
+        goto out;
+    }
     data = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
     if (!data) {
         return 1;
@@ -269,6 +279,7 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
         qxl_log_cmd_cursor(qxl, data, ext->group_id);
         break;
     }
+out:
     fprintf(stderr, "\n");
     return 0;
 }
-- 
2.37.3