[PATCH] ASoC: mediatek: mt8192: Check existence of dai_name before dereferencing
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)
On Tue, Jan 9, 2024 at 4:47 AM Nícolas F. R. A. Prado nfraprado@collabora.com wrote:
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
Reviewed-by: Chen-Yu Tsai wenst@chromium.org Tested-by: Chen-Yu Tsai wenst@chromium.org
Audio now works again on my MT8192 Hayato.
On Mon, 08 Jan 2024 17:44:58 -0300, Nícolas F. R. A. Prado wrote:
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.
[...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: mediatek: mt8192: Check existence of dai_name before dereferencing commit: 4d4e1b6319e5c4425ea3faeaf9a10b8b4c16c1e1
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
participants (3)
-
Chen-Yu Tsai -
Mark Brown -
Nícolas F. R. A. Prado