From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com> To: Mark Brown <broonie@kernel.org> Cc: "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>, kernel@collabora.com, "Nícolas F. R. A. Prado" <nfraprado@collabora.com>, "Jaroslav Kysela" <perex@perex.cz>, "Kuninori Morimoto" <kuninori.morimoto.gx@renesas.com>, "Liam Girdwood" <lgirdwood@gmail.com>, "Matthias Brugger" <matthias.bgg@gmail.com>, "Nícolas F. R. A. Prado via Alsa-devel" <alsa-devel@alsa-project.org>, "Rob Herring" <robh@kernel.org>, "Takashi Iwai" <tiwai@suse.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-sound@vger.kernel.org Subject: [PATCH] ASoC: mediatek: mt8192: Check existence of dai_name before dereferencing Date: Mon, 8 Jan 2024 17:44:58 -0300 [thread overview] Message-ID: <20240108204508.691739-1-nfraprado@collabora.com> (raw) Following commit 13f58267cda3 ("ASoC: soc.h: don't create dummy Component via COMP_DUMMY()"), the dai_name field is only populated for dummy components after the card is registered. This causes a null pointer dereference in the mt8192-mt6359 sound card driver's probe function when searching for a dai_name among all the card's dai links. Verify that the dai_name is non-null before passing it to strcmp. While at it, also check that there's at least one codec. Reported-by: "kernelci.org bot" <bot@kernelci.org> Closes: https://linux.kernelci.org/test/case/id/6582cd6d992645c680e13478/ Fixes: 13f58267cda3 ("ASoC: soc.h: don't create dummy Component via COMP_DUMMY()") Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c index 5bd6addd1450..bfcb2c486c39 100644 --- a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c +++ b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c @@ -1208,7 +1208,8 @@ static int mt8192_mt6359_dev_probe(struct platform_device *pdev) dai_link->ignore = 0; } - if (strcmp(dai_link->codecs[0].dai_name, RT1015_CODEC_DAI) == 0) + if (dai_link->num_codecs && dai_link->codecs[0].dai_name && + strcmp(dai_link->codecs[0].dai_name, RT1015_CODEC_DAI) == 0) dai_link->ops = &mt8192_rt1015_i2s_ops; if (!dai_link->platforms->name) -- 2.43.0
WARNING: multiple messages have this Message-ID (diff)
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com> To: Mark Brown <broonie@kernel.org> Cc: "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>, kernel@collabora.com, "Nícolas F. R. A. Prado" <nfraprado@collabora.com>, "Jaroslav Kysela" <perex@perex.cz>, "Kuninori Morimoto" <kuninori.morimoto.gx@renesas.com>, "Liam Girdwood" <lgirdwood@gmail.com>, "Matthias Brugger" <matthias.bgg@gmail.com>, "Nícolas F. R. A. Prado via Alsa-devel" <alsa-devel@alsa-project.org>, "Rob Herring" <robh@kernel.org>, "Takashi Iwai" <tiwai@suse.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-sound@vger.kernel.org Subject: [PATCH] ASoC: mediatek: mt8192: Check existence of dai_name before dereferencing Date: Mon, 8 Jan 2024 17:44:58 -0300 [thread overview] Message-ID: <20240108204508.691739-1-nfraprado@collabora.com> (raw) Following commit 13f58267cda3 ("ASoC: soc.h: don't create dummy Component via COMP_DUMMY()"), the dai_name field is only populated for dummy components after the card is registered. This causes a null pointer dereference in the mt8192-mt6359 sound card driver's probe function when searching for a dai_name among all the card's dai links. Verify that the dai_name is non-null before passing it to strcmp. While at it, also check that there's at least one codec. Reported-by: "kernelci.org bot" <bot@kernelci.org> Closes: https://linux.kernelci.org/test/case/id/6582cd6d992645c680e13478/ Fixes: 13f58267cda3 ("ASoC: soc.h: don't create dummy Component via COMP_DUMMY()") Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c index 5bd6addd1450..bfcb2c486c39 100644 --- a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c +++ b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c @@ -1208,7 +1208,8 @@ static int mt8192_mt6359_dev_probe(struct platform_device *pdev) dai_link->ignore = 0; } - if (strcmp(dai_link->codecs[0].dai_name, RT1015_CODEC_DAI) == 0) + if (dai_link->num_codecs && dai_link->codecs[0].dai_name && + strcmp(dai_link->codecs[0].dai_name, RT1015_CODEC_DAI) == 0) dai_link->ops = &mt8192_rt1015_i2s_ops; if (!dai_link->platforms->name) -- 2.43.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2024-01-08 20:47 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-08 20:44 Nícolas F. R. A. Prado [this message] 2024-01-08 20:44 ` [PATCH] ASoC: mediatek: mt8192: Check existence of dai_name before dereferencing Nícolas F. R. A. Prado 2024-01-09 3:44 ` Chen-Yu Tsai 2024-01-09 3:44 ` Chen-Yu Tsai 2024-01-09 9:53 ` Mark Brown 2024-01-09 9:53 ` Mark Brown
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20240108204508.691739-1-nfraprado@collabora.com \ --to=nfraprado@collabora.com \ --cc=alsa-devel@alsa-project.org \ --cc=angelogioacchino.delregno@collabora.com \ --cc=broonie@kernel.org \ --cc=kernel@collabora.com \ --cc=kuninori.morimoto.gx@renesas.com \ --cc=lgirdwood@gmail.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mediatek@lists.infradead.org \ --cc=linux-sound@vger.kernel.org \ --cc=matthias.bgg@gmail.com \ --cc=perex@perex.cz \ --cc=robh@kernel.org \ --cc=tiwai@suse.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.