[PATCH v2 2/4] trace-cmd: Fix NULL pointer being passed to memcpy

[Michael Sartain]

Signed-off-by: Michael Sartain <mikesart@xxxxxxxxxxxx>
---
 trace-output.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/trace-output.c b/trace-output.c
index bfe6331..bbb1637 100644
--- a/trace-output.c
+++ b/trace-output.c
@@ -929,7 +929,11 @@ tracecmd_add_option(struct tracecmd_output *handle,
 		free(option);
 		return NULL;
 	}
-	memcpy(option->data, data, size);
+
+	/* Some IDs (like TRACECMD_OPTION_TRACECLOCK) pass 0 / NULL data */
+	if (size)
+		memcpy(option->data, data, size);
+
 	list_add_tail(&option->list, &handle->options);
 
 	return option;
-- 
2.14.2