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tracing: Add missing nest end to synth_event_trace_start() error case

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If the ring_buffer reserve in synth_event_trace_start() fails, the
matching ring_buffer_nest_end() should be called in the error code,
since nothing else will ever call it in this case.

Link: http://lkml.kernel.org/r/20abc444b3eeff76425f895815380abe7aa53ff8.1581374549.git.zanussi@kernel.org

Fixes: 8dcc53ad95 ("tracing: Add synth_event_trace() and related functions")
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2020-02-10 17:06:48 -06:00 committed by Steven Rostedt (VMware)
parent 9737800111
commit d090409abb
1 changed files with 1 additions and 0 deletions
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kernel/trace/trace_events_hist.c
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@ -2043,6 +2043,7 @@ int synth_event_trace_start(struct trace_event_file *file,
entry = trace_event_buffer_reserve(&trace_state->fbuffer, file,
sizeof(*entry) + fields_size);
if (!entry) {
ring_buffer_nest_end(trace_state->buffer);
ret = -EINVAL;
goto out;
}