2023-06-17 08:34:58

by Fei Shao

[permalink] [raw]
Subject: [PATCH] clk: Fix memory leak in devm_clk_notifier_register()

devm_clk_notifier_register() allocates a devres resource for clk
notifier but didn't register that to the device, so the notifier didn't
get unregistered on device detach and the allocated resource was leaked.

This fixes the issue.

Fixes: 6d30d50d037d ("clk: add devm variant of clk_notifier_register")
Signed-off-by: Fei Shao <[email protected]>
---

drivers/clk/clk.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 7ac9f7a8cb84..c249f9791ae8 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -4741,6 +4741,7 @@ int devm_clk_notifier_register(struct device *dev, struct clk *clk,
if (!ret) {
devres->clk = clk;
devres->nb = nb;
+ devres_add(dev, devres);
} else {
devres_free(devres);
}
--
2.41.0.162.gfafddb0af9-goog



2023-06-19 04:35:09

by Fei Shao

[permalink] [raw]
Subject: Re: [PATCH] clk: Fix memory leak in devm_clk_notifier_register()

On Sun, Jun 18, 2023 at 4:06 AM Markus Elfring <[email protected]> wrote:
>
> > This fixes the issue.
>
> Please replace this sentence by an imperative change suggestion.
>
> See also:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.4-rc6#n94
>
> Regards,
> Markus

Thanks for the feedback. I just sent v2.

Regards,
Fei

2023-06-19 05:46:39

by Dan Carpenter

[permalink] [raw]
Subject: Re: [PATCH] clk: Fix memory leak in devm_clk_notifier_register()

On Mon, Jun 19, 2023 at 11:56:56AM +0800, Fei Shao wrote:
> On Sun, Jun 18, 2023 at 4:06 AM Markus Elfring <[email protected]> wrote:
> >
> > > This fixes the issue.
> >
> > Please replace this sentence by an imperative change suggestion.
> >
> > See also:
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.4-rc6#n94
> >
> > Regards,
> > Markus
>
> Thanks for the feedback. I just sent v2.

Markus is banned from vger lists... He doesn't have a very accurate
perspective of what is important and what is not important.

regards,
dan carpenter