From: Miaoqian Lin <linmq006@gmail.com> To: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Nicolas Ferre <nicolas.ferre@microchip.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Claudiu Beznea <claudiu.beznea@microchip.com>, Florian Meier <florian.meier@koalo.de>, alsa-devel@alsa-project.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com Subject: [PATCH v2] ASoC: atmel: Fix error handling in snd_proto_probe Date: Tue, 8 Mar 2022 01:39:48 +0000 [thread overview] Message-ID: <20220308013949.20323-1-linmq006@gmail.com> (raw) In-Reply-To: <582c39ac-3099-d54f-5de3-d54a4ace0a04@microchip.com> 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: a45f8853a5f9 ("ASoC: Add driver for PROTO Audio CODEC (with a WM8731)") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> --- changes in v2: - remove extra line. --- sound/soc/atmel/mikroe-proto.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/sound/soc/atmel/mikroe-proto.c b/sound/soc/atmel/mikroe-proto.c index 627564c18c27..ce46d8a0b7e4 100644 --- a/sound/soc/atmel/mikroe-proto.c +++ b/sound/soc/atmel/mikroe-proto.c @@ -115,7 +115,8 @@ static int snd_proto_probe(struct platform_device *pdev) cpu_np = of_parse_phandle(np, "i2s-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "i2s-controller missing\n"); - return -EINVAL; + ret = -EINVAL; + goto put_codec_node; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; @@ -125,7 +126,8 @@ static int snd_proto_probe(struct platform_device *pdev) &bitclkmaster, &framemaster); if (bitclkmaster != framemaster) { dev_err(&pdev->dev, "Must be the same bitclock and frame master\n"); - return -EINVAL; + ret = -EINVAL; + goto put_cpu_node; } if (bitclkmaster) { if (codec_np == bitclkmaster) @@ -136,18 +138,20 @@ static int snd_proto_probe(struct platform_device *pdev) dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL); } - of_node_put(bitclkmaster); - of_node_put(framemaster); - dai->dai_fmt = dai_fmt; - - of_node_put(codec_np); - of_node_put(cpu_np); + dai->dai_fmt = dai_fmt; ret = snd_soc_register_card(&snd_proto); if (ret) dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); + +put_cpu_node: + of_node_put(bitclkmaster); + of_node_put(framemaster); + of_node_put(cpu_np); +put_codec_node: + of_node_put(codec_np); return ret; } -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Miaoqian Lin <linmq006@gmail.com> To: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Nicolas Ferre <nicolas.ferre@microchip.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Claudiu Beznea <claudiu.beznea@microchip.com>, Florian Meier <florian.meier@koalo.de>, alsa-devel@alsa-project.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com Subject: [PATCH v2] ASoC: atmel: Fix error handling in snd_proto_probe Date: Tue, 8 Mar 2022 01:39:48 +0000 [thread overview] Message-ID: <20220308013949.20323-1-linmq006@gmail.com> (raw) In-Reply-To: <582c39ac-3099-d54f-5de3-d54a4ace0a04@microchip.com> 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: a45f8853a5f9 ("ASoC: Add driver for PROTO Audio CODEC (with a WM8731)") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> --- changes in v2: - remove extra line. --- sound/soc/atmel/mikroe-proto.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/sound/soc/atmel/mikroe-proto.c b/sound/soc/atmel/mikroe-proto.c index 627564c18c27..ce46d8a0b7e4 100644 --- a/sound/soc/atmel/mikroe-proto.c +++ b/sound/soc/atmel/mikroe-proto.c @@ -115,7 +115,8 @@ static int snd_proto_probe(struct platform_device *pdev) cpu_np = of_parse_phandle(np, "i2s-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "i2s-controller missing\n"); - return -EINVAL; + ret = -EINVAL; + goto put_codec_node; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; @@ -125,7 +126,8 @@ static int snd_proto_probe(struct platform_device *pdev) &bitclkmaster, &framemaster); if (bitclkmaster != framemaster) { dev_err(&pdev->dev, "Must be the same bitclock and frame master\n"); - return -EINVAL; + ret = -EINVAL; + goto put_cpu_node; } if (bitclkmaster) { if (codec_np == bitclkmaster) @@ -136,18 +138,20 @@ static int snd_proto_probe(struct platform_device *pdev) dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL); } - of_node_put(bitclkmaster); - of_node_put(framemaster); - dai->dai_fmt = dai_fmt; - - of_node_put(codec_np); - of_node_put(cpu_np); + dai->dai_fmt = dai_fmt; ret = snd_soc_register_card(&snd_proto); if (ret) dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); + +put_cpu_node: + of_node_put(bitclkmaster); + of_node_put(framemaster); + of_node_put(cpu_np); +put_codec_node: + of_node_put(codec_np); return ret; } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-03-08 1:40 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-07 13:04 [PATCH] ASoC: atmel: Fix error handling in snd_proto_probe Miaoqian Lin 2022-03-07 13:04 ` Miaoqian Lin 2022-03-07 13:45 ` Codrin.Ciubotariu 2022-03-07 13:45 ` Codrin.Ciubotariu 2022-03-08 1:39 ` Miaoqian Lin [this message] 2022-03-08 1:39 ` [PATCH v2] " Miaoqian Lin 2022-03-08 17:20 ` Mark Brown 2022-03-08 17:20 ` Mark Brown
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