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spapr: fix potential memory leak in spapr_core_plug() 

Since commit 5c1da81215 ("spapr: Remove unnecessary differences between
hotplug and coldplug paths"), the CPU DT for the DRC is always allocated.
This causes a memory leak for pseries-2.6 and older machine types, that
don't support CPU hotplug and don't allocate DRCs for CPUs.

Reported-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2017-07-12 11:48:39 +02:00 committed by David Gibson
parent 67fea71bf3
commit e49c63d5b3
1 changed files with 5 additions and 4 deletions
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9
hw/ppc/spapr.c
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@ -2974,8 +2974,6 @@ static void spapr_core_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
CPUState *cs = CPU(core->threads);
sPAPRDRConnector *drc;
Error *local_err = NULL;
void *fdt = NULL;
int fdt_offset = 0;
int smt = kvmppc_smt_threads();
CPUArchId *core_slot;
int index;
@ -2991,9 +2989,12 @@ static void spapr_core_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
g_assert(drc || !mc->has_hotpluggable_cpus);
fdt = spapr_populate_hotplug_cpu_dt(cs, &fdt_offset, spapr);
if (drc) {
void *fdt;
int fdt_offset;
fdt = spapr_populate_hotplug_cpu_dt(cs, &fdt_offset, spapr);
spapr_drc_attach(drc, dev, fdt, fdt_offset, &local_err);
if (local_err) {
g_free(fdt);