commit 2f99f80c5dbb319bebede5f737efcb0b2253a45b
author Gerd Hoffmann <kraxel@redhat.com> Fri Oct 05 15:46:08 2018 +0200
committer Gerd Hoffmann <kraxel@redhat.com> Mon Oct 15 09:57:33 2018 +0200
tree 1657803942d2bf327f34a910f83ce9678e6f7060
parent a0d098b7942bf8522375c2f899d89c39b7f3c899

qxl: check qxl_phys2virt return value

Fixes: CID 1395986
Fixes: 979f7ef8966bc4495a710ed9e4af42098f92ee79
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181005134608.1251-1-kraxel@redhat.com

hw/display/qxl.c

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index e628cf1..f608abc 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -290,7 +290,7 @@
     }
 
     cfg = qxl_phys2virt(qxl, qxl->guest_monitors_config, MEMSLOT_GROUP_GUEST);
-    if (cfg->count == 1) {
+    if (cfg != NULL && cfg->count == 1) {
         qxl->guest_primary.resized = 1;
         qxl->guest_head0_width  = cfg->heads[0].width;
         qxl->guest_head0_height = cfg->heads[0].height;