perf pmu: Avoid segv for missing name/alias_name in wildcarding

The pmu name or alias_name fields may be NULL and should be skipped if
so. This is done in all loops of perf_pmu___name_match except the
final wildcard loop which was an oversight.

Fixes: 63e2871 ("perf pmu: Rename name matching for no suffix or wildcard variants")
Signed-off-by: Ian Rogers <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Fixup the Fixes: tag to the right commit ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: captain5050

tools/perf/util/pmu.c

@@ -2143,6 +2143,9 @@ static bool perf_pmu___name_match(const struct perf_pmu *pmu, const char *to_mat
 	for (size_t i = 0; i < ARRAY_SIZE(names); i++) {
 		const char *name = names[i];
 
+		if (!name)
+			continue;
+
 		if (wildcard && perf_pmu__match_wildcard_uncore(name, to_match))
 			return true;
 		if (!wildcard && perf_pmu__match_ignoring_suffix_uncore(name, to_match))