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authorArnaldo Carvalho de Melo <acme@redhat.com>2017-08-17 14:22:50 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-08-17 16:39:15 -0300
commitd17d0878f456c8227345b6c76b918ec068fa0abd (patch)
tree99ac28dae00148f660b53d163a3b8ad9083fb3a3 /tools/perf
parent5d369a75eda5855d64981668a1d60cfac00d52e9 (diff)
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perf events parse: Use just one parse events state struct
Andi reported problems when parse errors were detected with vendor events (json), because in the yyparse/parse_events_parse function we dereferenced the _data parameter to two different structs, with different layouts, which ended up making parse_events_evlist->error to point to random stack addresses. Fix it by making _data to always be struct parse_events_state, changing the only place where 'struct parse_events_term' was used in parse_events.y. Reported-by: Andi Kleen <ak@linux.intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-bc27lshz823hxl8n9nkelcgh@git.kernel.org Fixes: 90e2b22dee90 ("perf/tool: Add support to reuse event grammar to parse out terms") Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/parse-events.c2
-rw-r--r--tools/perf/util/parse-events.h5
-rw-r--r--tools/perf/util/parse-events.y2
3 files changed, 3 insertions, 6 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 272eab7f5ac8..d4fcf048aa9e 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1656,7 +1656,7 @@ static int parse_events__scanner(const char *str, void *data, int start_token)
*/
int parse_events_terms(struct list_head *terms, const char *str)
{
- struct parse_events_terms data = {
+ struct parse_events_state data = {
.terms = NULL,
};
int ret;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 8fff8423469b..2a3617937894 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -114,10 +114,7 @@ struct parse_events_state {
int nr_groups;
struct parse_events_error *error;
struct perf_evlist *evlist;
-};
-
-struct parse_events_terms {
- struct list_head *terms;
+ struct list_head *terms;
};
void parse_events__shrink_config_terms(void);
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 403a221266b8..4b37546e4914 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -488,7 +488,7 @@ opt_event_config:
start_terms: event_config
{
- struct parse_events_terms *data = _data;
+ struct parse_events_state *data = _data;
data->terms = $1;
}