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authorArnaldo Carvalho de Melo <acme@redhat.com>2021-05-19 13:50:31 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-05-21 07:47:56 -0300
commit3b2f17ad1770e51b8b4e68b5069c4f1ee477eff8 (patch)
treee69f72cb5ededab886aa7e1db09f8a184a7c4818 /tools
parentfb6c79d7261afb7e942251254ea47951c2a9a706 (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 <tmricht@linux.ibm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Link: https://lore.kernel.org/linux-perf-users/YKVESEKRjKtILhog@kernel.org/ Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/parse-events.c9
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;