From: Masami Hiramatsu Date: Fri, 10 Jan 2020 16:06:05 +0000 (+0900) Subject: tracing: Add NULL trace-array check in print_synth_event() X-Git-Tag: v5.6-rc1~47^2~71 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=48ac9488a597eb6116472b6cc0bd875e245e252c;p=linux.git tracing: Add NULL trace-array check in print_synth_event() Add NULL trace-array check in print_synth_event(), because if we enable tp_printk option, iter->tr can be NULL. Link: http://lkml.kernel.org/r/157867236536.17873.12529350542460184019.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 4f4759c6e972..1cb4c4c8e5b7 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -833,7 +833,7 @@ 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);