[Crash-utility] [PATCH] trace: don't use uninited max_tr_ring_buffer

From: Rabin Vincent <rabinv(a)axis.com&gt; 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