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qemuDomainGetResctrlMonData: Dereference resctrl monitor iff not NULL

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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>
This commit is contained in:
Michal Privoznik 2019-08-06 13:44:17 +02:00
parent 9801ee899f
commit 9fc616cc10
1 changed files with 2 additions and 1 deletions
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src/qemu/qemu_driver.c
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@ -20744,7 +20744,8 @@ qemuDomainGetResctrlMonData(virQEMUDriverPtr driver,
caps = virQEMUDriverGetCapabilities(driver, false); caps = virQEMUDriverGetCapabilities(driver, false);
if (tag == VIR_RESCTRL_MONITOR_TYPE_CACHE) { 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 { } else {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s", virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unsupported resctrl monitor type")); _("Unsupported resctrl monitor type"));