linux-kernel - [PATCH] drivers: nvdimm: fix memleak

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Date:   Thu, 17 Aug 2023 19:59:45 +0800
From:   Konstantin Meskhidze <konstantin.meskhidze@...wei.com>
To:     <dan.j.williams@...el.com>
CC:     <vishal.l.verma@...el.com>, <dave.jiang@...el.com>,
        <ira.weiny@...el.com>, <nvdimm@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, <yusongping@...wei.com>,
        <artem.kuzin@...wei.com>
Subject: [PATCH] drivers: nvdimm: fix memleak

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'.

Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@...wei-partners.com>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@...wei.com>
---
 drivers/nvdimm/nd_perf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvdimm/nd_perf.c b/drivers/nvdimm/nd_perf.c
index 433bbb68a..14881c4e0 100644
--- a/drivers/nvdimm/nd_perf.c
+++ b/drivers/nvdimm/nd_perf.c
@@ -323,7 +323,8 @@ EXPORT_SYMBOL_GPL(register_nvdimm_pmu);
 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);
-- 
2.34.1