| Message ID | 20220316014059.19292-1-linmq006@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] ASoC: mediatek: Fix error handling in mt8183_da7219_max98357_dev_probe | expand |
On Wed, Mar 16, 2022 at 01:40:57AM +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 paths. > Fix this by calling of_node_put() in error handling too. > > Fixes: 5bdbe9771177 ("ASoC: mediatek: mt8183-da7219: use hdmi-codec") > Fixes: ebbddc75bbe8 ("ASoC: Mediatek: MT8183: Add machine driver with DA7219") Again, I am not sure if the Fixes tag makes sense. Although the issue was there when the driver birth, there are some more commits after then. Given that: - The patch is a minor fix (see [1][2]). - There is no specific commit the patch aims to fix. I prefer to drop the Fixes tags. In any case, I don't think the tags would be helpful. I would defer to Mark. [1]: https://elixir.bootlin.com/linux/v5.17-rc8/source/include/linux/of.h#L129 [2]: https://elixir.bootlin.com/linux/v5.17-rc8/source/drivers/of/Kconfig#L55 > Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
On Wed, 16 Mar 2022 01:40:57 +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 paths. > Fix this by calling of_node_put() in error handling too. > > [...] Applied to https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next Thanks! [1/1] ASoC: mediatek: Fix error handling in mt8183_da7219_max98357_dev_probe commit: 28a265a1ee11febeec5ea73a804f30dcec3181ca 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
diff --git a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c index 718505c75418..f090dee0c7a4 100644 --- a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c +++ b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c @@ -695,8 +695,11 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev) } card = (struct snd_soc_card *)of_device_get_match_data(&pdev->dev); - if (!card) - return -EINVAL; + if (!card) { + ret = -EINVAL; + goto put_platform_node; + } + card->dev = &pdev->dev; hdmi_codec = of_parse_phandle(pdev->dev.of_node, @@ -761,12 +764,15 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev) if (!mt8183_da7219_max98357_headset_dev.dlc.of_node) { dev_err(&pdev->dev, "Property 'mediatek,headset-codec' missing/invalid\n"); - return -EINVAL; + ret = -EINVAL; + goto put_hdmi_codec; } priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; + if (!priv) { + ret = -ENOMEM; + goto put_hdmi_codec; + } snd_soc_card_set_drvdata(card, priv); @@ -775,13 +781,16 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev) ret = PTR_ERR(pinctrl); dev_err(&pdev->dev, "%s failed to select default state %d\n", __func__, ret); - return ret; + goto put_hdmi_codec; } ret = devm_snd_soc_register_card(&pdev->dev, card); - of_node_put(platform_node); + +put_hdmi_codec: of_node_put(hdmi_codec); +put_platform_node: + of_node_put(platform_node); return ret; }
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 paths. Fix this by calling of_node_put() in error handling too. Fixes: 5bdbe9771177 ("ASoC: mediatek: mt8183-da7219: use hdmi-codec") Fixes: ebbddc75bbe8 ("ASoC: Mediatek: MT8183: Add machine driver with DA7219") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> --- change in v2: - update Fixes tag. --- .../mediatek/mt8183/mt8183-da7219-max98357.c | 23 +++++++++++++------ 1 file changed, 16 insertions(+), 7 deletions(-)