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Message-ID: <a5d425b0-9a23-e58a-52aa-db380234dc30@intel.com>
Date: Thu, 17 Aug 2023 09:00:50 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Konstantin Meskhidze <konstantin.meskhidze@...wei.com>,
<dan.j.williams@...el.com>
CC: <vishal.l.verma@...el.com>, <ira.weiny@...el.com>,
<nvdimm@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
<yusongping@...wei.com>, <artem.kuzin@...wei.com>
Subject: Re: [PATCH] drivers: nvdimm: fix memleak
On 8/17/23 04:59, Konstantin Meskhidze wrote:
> 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>
Applied and changed subject to:
nvdimm: Fix memleak of pmu attr_groups in unregister_nvdimm_pmu()
Also added fixes tag:
Fixes: 0fab1ba6ad6b ("drivers/nvdimm: Add perf interface to expose
nvdimm performance stats")
> ---
> 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);
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