diff options
| author | Arnaldo Carvalho de Melo <[email protected]> | 2021-05-19 13:50:31 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2021-05-21 07:47:56 -0300 |
| commit | 3b2f17ad1770e51b8b4e68b5069c4f1ee477eff8 (patch) | |
| tree | e69f72cb5ededab886aa7e1db09f8a184a7c4818 | |
| parent | fb6c79d7261afb7e942251254ea47951c2a9a706 (diff) | |
perf parse-events: Check if the software events array slots are populated
To avoid a NULL pointer dereference when the kernel supports the new
feature but the tooling still hasn't an entry for it.
This happened with the recently added PERF_COUNT_SW_CGROUP_SWITCHES
software event.
Reported-by: Thomas Richter <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Sumanth Korikkar <[email protected]>
Link: https://lore.kernel.org/linux-perf-users/[email protected]/
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/parse-events.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 269997066f6e..84108c17f48d 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -2932,9 +2932,14 @@ restart: } for (i = 0; i < max; i++, syms++) { + /* + * New attr.config still not supported here, the latest + * example was PERF_COUNT_SW_CGROUP_SWITCHES + */ + if (syms->symbol == NULL) + continue; - if (event_glob != NULL && syms->symbol != NULL && - !(strglobmatch(syms->symbol, event_glob) || + if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) || (syms->alias && strglobmatch(syms->alias, event_glob)))) continue; |