From: Rabin Vincent <[email protected]>
This max buffer is not available in all configurations of the kernel so
we shouldn't attempt to use the unitialized max_tr_ring_buffer variable.
A similar check existed previously before the recent rework of the trace
extension to support multiple buffers.
---
extensions/trace.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/extensions/trace.c b/extensions/trace.c
index 51df98d..22039a9 100644
--- a/extensions/trace.c
+++ b/extensions/trace.c
@@ -487,6 +487,9 @@ static int ftrace_init_trace(struct trace_instance *ti,
ulong instance_addr)
ti->pages) < 0)
goto out_fail;
+ if (!ti->max_tr_ring_buffer)
+ return 0;
+
ti->max_tr_buffers = calloc(sizeof(*ti->max_tr_buffers), nr_cpu_ids);
if (ti->max_tr_buffers == NULL)
goto out_fail;
--
2.1.4
--
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