From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Masami Hiramatsu Subject: [RFC PATCH v2 06/15] tracing: Add NULL trace-array check in print_synth_event() Date: Mon, 15 Jul 2019 14:12:12 +0900 Message-Id: <156316753259.23477.16711531463620386669.stgit@devnote2> In-Reply-To: <156316746861.23477.5815110570539190650.stgit@devnote2> References: <156316746861.23477.5815110570539190650.stgit@devnote2> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: Steven Rostedt , Rob Herring , Frank Rowand , Tim Bird Cc: Ingo Molnar , Namhyung Kim , Jiri Olsa , Arnaldo Carvalho de Melo , Tom Zanussi , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org List-ID: 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 --- kernel/trace/trace_events_hist.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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);