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Groups > linux.kernel > #1720946
| From | MyungJoo Ham <myungjoo.ham@samsung.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | RE: [PATCH 01/12] PM / devfreq: Fix memory leak when fail to register device |
| Date | 2017-08-28 02:20 +0200 |
| Message-ID | <ujfWx-6Ko-1@gated-at.bofh.it> (permalink) |
| References | <uhPrr-8ei-9@gated-at.bofh.it> <uhPrr-8ei-3@gated-at.bofh.it> <ujfWx-6Ko-3@gated-at.bofh.it> <uhPrr-8ei-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
> When the devfreq_add_device fails to register deivce, the memory
> leak of devfreq instance happen. So, this patch fix the memory
> leak issue. Before freeing the devfreq instance checks whether
> devfreq instance is NULL or not because the device_unregister()
> frees the devfreq instance when jumping to the 'err_init'.
> It is to prevent the duplicate the kfee(devfreq).
>
> Cc: stable@vger.kernel.org
> Fixes: ac4b281176a5 ("PM / devfreq: fix duplicated kfree on devfreq pointer")
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> ---
> drivers/devfreq/devfreq.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
This looks like to be duplicated. Please check your repo basis.
Cheers,
MyungJoo
>
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index dea04871b50d..a1c4ee818614 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -564,7 +564,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
> err = device_register(&devfreq->dev);
> if (err) {
> mutex_unlock(&devfreq->lock);
> - goto err_out;
> + goto err_dev;
> }
>
> devfreq->trans_table = devm_kzalloc(&devfreq->dev,
> @@ -610,6 +610,9 @@ struct devfreq *devfreq_add_device(struct device *dev,
> mutex_unlock(&devfreq_list_lock);
>
> device_unregister(&devfreq->dev);
> +err_dev:
> + if (devfreq)
> + kfree(devfreq);
> err_out:
> return ERR_PTR(err);
> }
> --
> 1.9.1
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RE: [PATCH 01/12] PM / devfreq: Fix memory leak when fail to register device MyungJoo Ham <myungjoo.ham@samsung.com> - 2017-08-28 02:20 +0200
Re: [PATCH 01/12] PM / devfreq: Fix memory leak when fail to register device Chanwoo Choi <cw00.choi@samsung.com> - 2017-08-28 02:30 +0200
RE: Re: [PATCH 01/12] PM / devfreq: Fix memory leak when fail to register device MyungJoo Ham <myungjoo.ham@samsung.com> - 2017-08-28 03:40 +0200
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