6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aleksandr Mishin <amishin@xxxxxxxxxx>
[ Upstream commit 5080808c3339de2220c602ab7c7fa23dc6c1a5a3 ]
acpi_get_first_physical_node() can return NULL in several cases (no such
device, ACPI table error, reference count drop to 0, etc).
Existing check just emit error message, but doesn't perform return.
Then this NULL pointer is passed to devm_acpi_dev_add_driver_gpios()
where it is dereferenced.
Adjust this error handling by adding error code return.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 02527c3f2300 ("ASoC: amd: add Machine driver for Jadeite platform")
Signed-off-by: Aleksandr Mishin <amishin@xxxxxxxxxx>
Link: https://patch.msgid.link/20240703191007.8524-1-amishin@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/soc/amd/acp-es8336.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sound/soc/amd/acp-es8336.c b/sound/soc/amd/acp-es8336.c
index 5e56d3a53be78..49bffc567e68d 100644
--- a/sound/soc/amd/acp-es8336.c
+++ b/sound/soc/amd/acp-es8336.c
@@ -203,8 +203,10 @@ static int st_es8336_late_probe(struct snd_soc_card *card)
codec_dev = acpi_get_first_physical_node(adev);
acpi_dev_put(adev);
- if (!codec_dev)
+ if (!codec_dev) {
dev_err(card->dev, "can not find codec dev\n");
+ return -ENODEV;
+ }
ret = devm_acpi_dev_add_driver_gpios(codec_dev, acpi_es8336_gpios);
if (ret)
--
2.43.0
