[PATCH 6.6 360/638] ASoC: SOF: amd: Fix memory leak in amd_sof_acp_probe()

Sasha Levin
2024-03-24T23:07:09Z

From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>

[ Upstream commit 222be59e5eed1554119294edc743ee548c2371d0 ]

Driver uses kasprintf() to initialize fw_{code,data}_bin members of
struct acp_dev_data, but kfree() is never called to deallocate the
memory, which results in a memory leak.

Fix the issue by switching to devm_kasprintf(). Additionally, ensure the
allocation was successful by checking the pointer validity.

Fixes: f7da88003c53 ("ASoC: SOF: amd: Enable signed firmware image loading for Vangogh platform")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Link: https://msgid.link/r/20231219030728.2431640-6-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/sof/amd/acp.c | 28 +++++++++++++++++++---------
1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index 19a801908b56d..4c54ce212de6a 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -547,17 +547,27 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
adata->signed_fw_image = false;
dmi_id = dmi_first_match(acp_sof_quirk_table);
if (dmi_id && dmi_id->driver_data) {
- adata->fw_code_bin = kasprintf(GFP_KERNEL, "%s/sof-%s-code.bin",
- plat_data->fw_filename_prefix,
- chip->name);
- adata->fw_data_bin = kasprintf(GFP_KERNEL, "%s/sof-%s-data.bin",
- plat_data->fw_filename_prefix,
- chip->name);
- adata->signed_fw_image = dmi_id->driver_data;
+ adata->fw_code_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
+ "%s/sof-%s-code.bin",
+ plat_data->fw_filename_prefix,
+ chip->name);
+ if (!adata->fw_code_bin) {
+ ret = -ENOMEM;
+ goto free_ipc_irq;
+ }
+
+ adata->fw_data_bin = devm_kasprintf(sdev->dev, GFP_KERNEL,
+ "%s/sof-%s-data.bin",
+ plat_data->fw_filename_prefix,
+ chip->name);
+ if (!adata->fw_data_bin) {
+ ret = -ENOMEM;
+ goto free_ipc_irq;
+ }

- dev_dbg(sdev->dev, "fw_code_bin:%s, fw_data_bin:%s\n", adata->fw_code_bin,
- adata->fw_data_bin);
+ adata->signed_fw_image = dmi_id->driver_data;
}
+
adata->enable_fw_debug = enable_fw_debug;
acp_memory_init(sdev);

--
2.43.0