diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-06-17 14:32:53 -0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-04 09:34:46 +0200 |
commit | b5f997a1d6a8c647bfdeaafbb6643f6141d0bd49 (patch) | |
tree | be4d47ef9a01283464c90b27ab31c4c7c89ce055 | |
parent | ffee58132ea668e7b0e7c813803543c37369edae (diff) |
perf evsel: Make perf_evsel__name() accept a NULL argument
[ Upstream commit fdbdd7e8580eac9bdafa532746c865644d125e34 ]
In which case it simply returns "unknown", like when it can't figure out
the evsel->name value.
This makes this code more robust and fixes a problem in 'perf trace'
where a NULL evsel was being passed to a routine that only used the
evsel for printing its name when a invalid syscall id was passed.
Reported-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-f30ztaasku3z935cn3ak3h53@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r-- | tools/perf/util/evsel.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 97fde9275f42..a8507fee654b 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -491,6 +491,9 @@ const char *perf_evsel__name(struct perf_evsel *evsel) { char bf[128]; + if (!evsel) + goto out_unknown; + if (evsel->name) return evsel->name; @@ -527,7 +530,10 @@ const char *perf_evsel__name(struct perf_evsel *evsel) evsel->name = strdup(bf); - return evsel->name ?: "unknown"; + if (evsel->name) + return evsel->name; +out_unknown: + return "unknown"; } const char *perf_evsel__group_name(struct perf_evsel *evsel) |