Hi,

Please ignore this patch. Due to an oversight on my part when testing the
patch, I ignore the Calltrace of slab-use-after-free in the sysboot log.

I will fix this issue in the next version. Sorry for the noise.

Best regards,
Junhao.

The ACPI buffer memory (buf.pointer) should be freed as the buffer
is not used after returning from acpi_get_dsd_graph(), free it to
prevent memory leak.

Fixes: 76ffa5ab5b79 ("coresight: Support for ACPI bindings")
Signed-off-by: Junhao He <hejunhao3@huawei.com>
---
 drivers/hwtracing/coresight/coresight-platform.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 3e2e135cb8f6..c61cac5e058e 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -524,12 +524,15 @@ acpi_get_dsd_graph(struct acpi_device *adev)
 		/* Skip the non-Graph _DSD packages */
 		if (!is_acpi_dsd_graph_guid(guid))
 			continue;
-		if (acpi_validate_dsd_graph(package))
+		if (acpi_validate_dsd_graph(package)) {
+			ACPI_FREE(buf.pointer);
 			return package;
+		}
 		/* Invalid graph format, continue */
 		dev_warn(&adev->dev, "Invalid Graph _DSD property\n");
 	}
 
+	ACPI_FREE(buf.pointer);
 	return NULL;
 }