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Message-ID: <20230915090450.206657cf@bootlin.com>
Date: Fri, 15 Sep 2023 09:04:50 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Lizhi Hou <lizhi.hou@....com>
Cc: <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>,
<robh@...nel.org>
Subject: Re: [PATCH] PCI: of: Fix memory leak when
of_changeset_create_node() failed
Hi Lizhi
On Thu, 14 Sep 2023 11:15:51 -0700
Lizhi Hou <lizhi.hou@....com> wrote:
> Destroy and free cset when failure happens.
>
> Fixes: 407d1a51921e ("PCI: Create device tree node for bridge")
> Reported-by: Herve Codina <herve.codina@...tlin.com>
> Closes: https://lore.kernel.org/all/20230911171319.495bb837@bootlin.com/
> Signed-off-by: Lizhi Hou <lizhi.hou@....com>
> ---
> drivers/pci/of.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/of.c b/drivers/pci/of.c
> index 2af64bcb7da3..67bbfa2fca59 100644
Why this patch alone ?
The issue fixed by this patch is related to the patch 2 in a series under review
https://lore.kernel.org/linux-kernel/ZQGaSr+G5qu%2F8nJZ@smile.fi.intel.com/
Is the patch 2 in this series already applied by some maintainers ?
You have to fix the patch in the series sending a new iteration of the series.
This patch alone does not make sense.
Otherwise, the modifications to fix the issue seem good.
Regards,
Hervé
> --- a/drivers/pci/of.c
> +++ b/drivers/pci/of.c
> @@ -663,7 +663,6 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
> np = of_changeset_create_node(cset, ppnode, name);
> if (!np)
> goto failed;
> - np->data = cset;
>
> ret = of_pci_add_properties(pdev, cset, np);
> if (ret)
> @@ -673,12 +672,17 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
> if (ret)
> goto failed;
>
> + np->data = cset;
> pdev->dev.of_node = np;
> kfree(name);
>
> return;
>
> failed:
> + if (cset) {
> + of_changeset_destroy(cset);
> + kfree(cset);
> + }
> if (np)
> of_node_put(np);
> kfree(name);
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