nvdimm: Fix memleak of pmu attr_groups in unregister_nvdimm_pmu()

Memory pointed by 'nd_pmu->pmu.attr_groups' is allocated in function
'register_nvdimm_pmu' and is lost after 'kfree(nd_pmu)' call in function
'unregister_nvdimm_pmu'.

Fixes: 0fab1ba6ad6b ("drivers/nvdimm: Add perf interface to expose nvdimm performance stats")
Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Link: https://lore.kernel.org/r/20230817115945.771826-1-konstantin.meskhidze@huawei.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

diff --git a/drivers/nvdimm/nd_perf.c b/drivers/nvdimm/nd_perf.c
index 433bbb6..14881c4 100644 (file)
--- a/drivers/nvdimm/nd_perf.c
+++ b/drivers/nvdimm/nd_perf.c
@@ -324,6 +324,7 @@ void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu)
 {
        perf_pmu_unregister(&nd_pmu->pmu);
        nvdimm_pmu_free_hotplug_memory(nd_pmu);
+       kfree(nd_pmu->pmu.attr_groups);
        kfree(nd_pmu);
 }
 EXPORT_SYMBOL_GPL(unregister_nvdimm_pmu);