From: Michal Privoznik <mprivozn@redhat.com>
Date: Tue, 6 Aug 2019 11:44:17 +0000 (+0200)
Subject: qemuDomainGetResctrlMonData: Dereference resctrl monitor iff not NULL
X-Git-Tag: v5.7.0-rc1~372
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9fc616cc101cdf8cd4a4679d2aa6db5ff5455c14;p=thirdparty%2Flibvirt.git

qemuDomainGetResctrlMonData: Dereference resctrl monitor iff not NULL

If the host doesn't have resctrl then the monitor is going to be
NULL and we must avoid dereferencing it.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d5a8beb134..25b6653e38 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -20744,7 +20744,8 @@ qemuDomainGetResctrlMonData(virQEMUDriverPtr driver,
     caps = virQEMUDriverGetCapabilities(driver, false);
 
     if (tag == VIR_RESCTRL_MONITOR_TYPE_CACHE) {
-        features = caps->host.cache.monitor->features;
+        if (caps->host.cache.monitor)
+            features = caps->host.cache.monitor->features;
     } else {
         virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                        _("Unsupported resctrl monitor type"));