diff mbox series

[RFC,v3,10/19] tracing: Add NULL trace-array check in print_synth_event()

Message ID 156678945659.21459.15789978012125587066.stgit@devnote2 (mailing list archive)
State New, archived
Headers show
Series tracing: skc: Boot-time tracing and Supplemental Kernel Cmdline | expand

Commit Message

Masami Hiramatsu (Google) Aug. 26, 2019, 3:17 a.m. UTC 
Add NULL trace-array check in print_synth_event(), because
if we enable tp_printk option, iter->tr can be NULL.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 kernel/trace/trace_events_hist.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index a7f447195143..db973928e580 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -822,7 +822,7 @@  static enum print_line_t print_synth_event(struct trace_iterator *iter,
 		fmt = synth_field_fmt(se->fields[i]->type);
 
 		/* parameter types */
-		if (tr->trace_flags & TRACE_ITER_VERBOSE)
+		if (tr && tr->trace_flags & TRACE_ITER_VERBOSE)
 			trace_seq_printf(s, "%s ", fmt);
 
 		snprintf(print_fmt, sizeof(print_fmt), "%%s=%s%%s", fmt);