[PATCH] ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

[PATCH] ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

[Miaoqian Lin]

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error path.

Fixes: 082482a50227 ("ASoC: mediatek: mt8195: release device_node after snd_soc_register_card")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
index 29c2d3407cc7..e3146311722f 100644
--- a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
+++ b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
@@ -1342,7 +1342,8 @@ static int mt8195_mt6359_rt1019_rt5682_dev_probe(struct platform_device *pdev)
 					      "mediatek,dai-link");
 		if (ret) {
 			dev_dbg(&pdev->dev, "Parse dai-link fail\n");
-			return -EINVAL;
+			ret = -EINVAL;
+			goto put_node;
 		}
 	} else {
 		if (!sof_on)
@@ -1398,6 +1399,7 @@ static int mt8195_mt6359_rt1019_rt5682_dev_probe(struct platform_device *pdev)
 
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 
+put_node:
 	of_node_put(platform_node);
 	of_node_put(adsp_node);
 	of_node_put(dp_node);
-- 
2.17.1


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Re: [PATCH] ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

[Mark Brown]

On Wed, 16 Mar 2022 08:46:15 +0000, Miaoqian Lin wrote:
> The device_node pointer is returned by of_parse_phandle()  with refcount
> incremented. We should use of_node_put() on it when done.
> 
> This function only calls of_node_put() in the regular path.
> And it will cause refcount leak in error path.
> 
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe
      commit: c4b7174fe5bb875a09a78674a14a1589d1a672f3

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

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