[PATCH v1] drivers:net:dsa:Fix resource leaks in fwnode_for_each_child_node() loops

[PATCH v1] drivers:net:dsa:Fix resource leaks in fwnode_for_each_child_node() loops

[Wang Ming]

 The fwnode_for_each_child_node loop in qca8k_setup_led_ctrl should
 have fwnode_handle_put() before return which could avoid resource leaks.
 This patch could fix this bug.

Signed-off-by: Wang Ming <machel@vivo.com>
---
 drivers/net/dsa/qca/qca8k-leds.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/qca/qca8k-leds.c b/drivers/net/dsa/qca/qca8k-leds.c
index 6f02029b4..d24ee5df9 100644
--- a/drivers/net/dsa/qca/qca8k-leds.c
+++ b/drivers/net/dsa/qca/qca8k-leds.c
@@ -450,8 +450,10 @@ qca8k_setup_led_ctrl(struct qca8k_priv *priv)
                 * the correct port for LED setup.
                 */
                ret = qca8k_parse_port_leds(priv, port, qca8k_port_to_phy(port_num));
-               if (ret)
+               if (ret) {
+                       fwnode_handle_put(port);
                        return ret;
+               }
        }

        return 0;
--
2.25.1


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Thank you

Re: [PATCH v1] drivers:net:dsa:Fix resource leaks in fwnode_for_each_child_node() loops

[Simon Horman]

On Thu, Jun 15, 2023 at 03:04:58PM +0800, Wang Ming wrote:
>  The fwnode_for_each_child_node loop in qca8k_setup_led_ctrl should
>  have fwnode_handle_put() before return which could avoid resource leaks.
>  This patch could fix this bug.
> 
> Signed-off-by: Wang Ming <machel@vivo.com>

Hi Wang Ming,

unfortunately your patch has been whitespace mangled - tabs have been
converted into 8 spaces. Possibly this was done by your mail client
or mail server. In any case the result is that the patch doesn't apply.
And unfortunately that breaks our processes.

Also, I'm assuming that as this patch is a fix, it is targeted at the
"net", as opposed to "net-next", tree. This should be noted in the subject.

	Subject: [PATCH net v2] ...

Lastly, looking at the git history of qca8k-leds.c, I think that
a better prefix for the patch is "net: dsa: qca8k: ".

	Subject: [PATCH net v2] net: dsa: qca8k: ...

Please consider addressing the problems and reposting your patch.

-- 
pw-bot: changes-requested

Re: [PATCH v1] drivers:net:dsa:Fix resource leaks in fwnode_for_each_child_node() loops

[Vladimir Oltean]

Hi Simon,

On Thu, Jun 15, 2023 at 03:03:15PM +0200, Simon Horman wrote:
> On Thu, Jun 15, 2023 at 03:04:58PM +0800, Wang Ming wrote:
> >  The fwnode_for_each_child_node loop in qca8k_setup_led_ctrl should
> >  have fwnode_handle_put() before return which could avoid resource leaks.
> >  This patch could fix this bug.
> > 
> > Signed-off-by: Wang Ming <machel@vivo.com>
> 
> Hi Wang Ming,
> 
> unfortunately your patch has been whitespace mangled - tabs have been
> converted into 8 spaces. Possibly this was done by your mail client
> or mail server. In any case the result is that the patch doesn't apply.
> And unfortunately that breaks our processes.
> 
> Also, I'm assuming that as this patch is a fix, it is targeted at the
> "net", as opposed to "net-next", tree. This should be noted in the subject.
> 
> 	Subject: [PATCH net v2] ...
> 
> Lastly, looking at the git history of qca8k-leds.c, I think that
> a better prefix for the patch is "net: dsa: qca8k: ".
> 
> 	Subject: [PATCH net v2] net: dsa: qca8k: ...
> 
> Please consider addressing the problems and reposting your patch.
> 
> -- 
> pw-bot: changes-requested

I think that according to the disclaimer text, you as a subscriber to
the mailing list should have deleted this message instead of commenting
on it :)

| The contents of this message and any attachments may contain confidential
| and/or privileged information and are intended exclusively for the
| addressee(s). If you are not the intended recipient of this message or
| their agent, please note that any use, dissemination, copying, or storage
| of this message or its attachments is not allowed.
| If you receive this message in error, please notify the sender by reply
| the message or phone and delete this message, any attachments and any
| copies immediately.

Seriously now, that has to go when posting to a mailing list whose archives
can be seen on the world wide web.
https://lore.kernel.org/netdev/20230615070512.6634-1-machel@vivo.com/

2 comments from my side on the actual patch.

1. There is an indentation of 1 space in the commit message which
   doesn't belong there.

2. I believe that the "ports" fwnode_handle is also leaked, both in the
   error as well as in the success case.

And one more process-related observation. You must find the commit which
introduced the problem and add:

Fixes: 1e264f9d2918 ("net: dsa: qca8k: add LEDs basic support")

and also CC the author of that patch.

Re: 回复: [PATCH v1] drivers:net:dsa:Fix resource leaks in fwnode_for_each_child_node() loops

[Vladimir Oltean]

On Fri, Jun 16, 2023 at 01:36:43AM +0000, 王明-软件底层技术部 wrote:
> Okay，thank you ,I will do as you suggest.

And because that patch is in net-next.git and not (yet) in net.git, the
prefix should be "[PATCH v2 net-next]".