diff options
| author | Taeung Song <treeze.taeung@gmail.com> | 2017-02-01 21:34:07 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-02-08 09:41:12 -0300 |
| commit | 360e071b1822d40357e371357f24f6ec43f0a080 (patch) | |
| tree | 0e02ef69ade6c9e2ebe082ef05afdf25ea6b5736 /tools | |
| parent | 506fde11a35f39e1b44478339c41e94dfd278aa2 (diff) | |
perf tools: Use zfree() to avoid keeping dangling pointers
The cases changed in this patch are for when we free but keep the
pointer to the freed area, which is not always a good idea.
Be more defensive and zero the pointer to avoid possible use after
free bugs to take more time to be detected.
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1485952447-7013-5-git-send-email-treeze.taeung@gmail.com
[ rewrote commit log ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/parse-events.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index ab1ba22d879a..07be0762e53e 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1479,7 +1479,7 @@ static void perf_pmu__parse_cleanup(void) for (i = 0; i < perf_pmu_events_list_num; i++) { p = perf_pmu_events_list + i; - free(p->symbol); + zfree(&p->symbol); } zfree(&perf_pmu_events_list); perf_pmu_events_list_num = 0; @@ -1570,7 +1570,7 @@ perf_pmu__parse_check(const char *name) r = bsearch(&p, perf_pmu_events_list, (size_t) perf_pmu_events_list_num, sizeof(struct perf_pmu_event_symbol), comp_pmu); - free(p.symbol); + zfree(&p.symbol); return r ? r->type : PMU_EVENT_SYMBOL_ERR; } @@ -1717,8 +1717,8 @@ static void parse_events_print_error(struct parse_events_error *err, fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str); if (err->help) fprintf(stderr, "\n%s\n", err->help); - free(err->str); - free(err->help); + zfree(&err->str); + zfree(&err->help); } fprintf(stderr, "Run 'perf list' for a list of valid events\n"); @@ -2413,7 +2413,7 @@ void parse_events_terms__purge(struct list_head *terms) list_for_each_entry_safe(term, h, terms, list) { if (term->array.nr_ranges) - free(term->array.ranges); + zfree(&term->array.ranges); list_del_init(&term->list); free(term); } @@ -2429,7 +2429,7 @@ void parse_events_terms__delete(struct list_head *terms) void parse_events__clear_array(struct parse_events_array *a) { - free(a->ranges); + zfree(&a->ranges); } void parse_events_evlist_error(struct parse_events_evlist *data, |