From: Michal Privoznik <mprivozn@redhat.com>
Date: Sat, 27 Jun 2020 07:20:21 +0000 (+0200)
Subject: qemuhotplugtest: Free monitor iff successfully initialized
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b150fbc4fe97b823707b7433dfb37e4f2f5b685e;p=libvirt.git

qemuhotplugtest: Free monitor iff successfully initialized

If initializing test monitor in testQemuHotplugCpuPrepare()
fails, the control jumps to error label where
testQemuHotplugCpuDataFree() is called. But since the data->mon
is NULL due to aforementioned failure,
qemuMonitorTestGetMonitor() dereferences a NULL pointer leading
to a SIGSEGV.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
---

diff --git a/tests/qemuhotplugtest.c b/tests/qemuhotplugtest.c
index ba3fc4d814..ba30cf5aa6 100644
--- a/tests/qemuhotplugtest.c
+++ b/tests/qemuhotplugtest.c
@@ -399,9 +399,11 @@ testQemuHotplugCpuDataFree(struct testQemuHotplugCpuData *data)
         virObjectUnref(data->vm);
     }
 
-    mon = qemuMonitorTestGetMonitor(data->mon);
-    virObjectLock(mon);
-    qemuMonitorTestFree(data->mon);
+    if (data->mon) {
+        mon = qemuMonitorTestGetMonitor(data->mon);
+        virObjectLock(mon);
+        qemuMonitorTestFree(data->mon);
+    }
     VIR_FREE(data);
 }