[PATCH AUTOSEL 6.1 07/53] ASoC: SOF: icp3-dtrace: Fix wrong kfree() usage

Sasha Levin
2024-01-22T15:10:05Z

From: Kamil Duljas <kamil.duljas@gmail.com>

[ Upstream commit 8c91ca76f44804868d12aed20ebdbc2f89aa7d60 ]

trace_filter_parse() allocs memory for *out and when
-ENOMEM is returned, caller function, dfsentry_trace_filter_write()
trying to freed this memory.

After this patch, the memory is freed in trace_filter_parse()
before -EINVAL returned. In caller function removed kfree(elms)
from error label

Signed-off-by: Kamil Duljas <kamil.duljas@gmail.com>
Link: https://lore.kernel.org/r/20231116220102.2097-2-kamil.duljas@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/sof/ipc3-dtrace.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/ipc3-dtrace.c b/sound/soc/sof/ipc3-dtrace.c
index 8cf421577378..c626cefa0ec5 100644
--- a/sound/soc/sof/ipc3-dtrace.c
+++ b/sound/soc/sof/ipc3-dtrace.c
@@ -137,6 +137,7 @@ static int trace_filter_parse(struct snd_sof_dev *sdev, char *string,
dev_err(sdev->dev,
"Parsing filter entry '%s' failed with %d\n",
entry, entry_len);
+ kfree(*out);
return -EINVAL;
}
}
@@ -215,13 +216,13 @@ static ssize_t dfsentry_trace_filter_write(struct file *file, const char __user
ret = ipc3_trace_update_filter(sdev, num_elems, elems);
if (ret < 0) {
dev_err(sdev->dev, "Filter update failed: %d\n", ret);
+ kfree(elems);
goto error;
}
}
ret = count;
error:
kfree(string);
- kfree(elems);
return ret;
}

--
2.43.0