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perf evlist: Use zfree() to reduce chances of use after free 

Do defensive programming by using zfree() to initialize freed pointers
to NULL, so that eventual use after free result in a NULL pointer deref
instead of more subtle behaviour.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-04-12 09:50:08 -03:00
parent c77ceb2eb0
commit 2bfc8134f9
1 changed files with 2 additions and 2 deletions
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4
tools/perf/util/evlist.c
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@ -2325,7 +2325,7 @@ int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *o
close_timerfd:
close(eet->timerfd);
free_eet_times:
free(eet->times);
zfree(&eet->times);
free_eet:
free(eet);
return err;
@ -2407,7 +2407,7 @@ void event_enable_timer__exit(struct event_enable_timer **ep)
{
if (!ep || !*ep)
return;
free((*ep)->times);
zfree(&(*ep)->times);
zfree(ep);
}