perf parse-events: Fix segfault when event parser gets an error
authorAdrian Hunter <adrian.hunter@intel.com>
Tue, 9 Aug 2022 08:07:00 +0000 (11:07 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 Aug 2022 09:40:15 +0000 (11:40 +0200)
commit5958ef867b9d75a66d819114e6a196ed10957097
tree62a08940f87c94edbaac2bc4268e570a10fa4b6c
parente8ab87549bbe5121db95ce68f7f32371e7203592
perf parse-events: Fix segfault when event parser gets an error

commit 2e828582b81f5bc76a4fe8e7812df259ab208302 upstream.

parse_events() is often called with parse_events_error set to NULL.
Make parse_events_error__handle() not segfault in that case.

A subsequent patch changes to avoid passing NULL in the first place.

Fixes: 43eb05d066795bdf ("perf tests: Support 'Track with sched_switch' test for hybrid")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220809080702.6921-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tools/perf/util/parse-events.c