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authorMasami Hiramatsu <mhiramat@redhat.com>2009-12-07 12:00:46 -0500
committerIngo Molnar <mingo@elte.hu>2009-12-07 18:33:21 +0100
commite1d2017b24fb31602f1128e6a8b2afc54c9283cd (patch)
tree7d085171e62e7c241438c22ea039d59554873da9
parentd56728b8d7fb3e1e5e5f97b88fdf6b43a35b4f5e (diff)
perf probe: Fix event namelist to duplicate string
Fix event namelist to duplicate string. Without duplicating, adding multiple probes causes stack overwrite bug, because it reuses a buffer on stack while the buffer is already added in the namelist. String duplication solves this bug because only contents of the buffer is copied to the namelist. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091207170046.19230.55557.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--tools/perf/util/probe-event.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index cd7fbda5e2a..de0d91385c9 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -413,12 +413,13 @@ static struct strlist *get_perf_event_names(int fd)
rawlist = get_trace_kprobe_event_rawlist(fd);
- sl = strlist__new(false, NULL);
+ sl = strlist__new(true, NULL);
for (i = 0; i < strlist__nr_entries(rawlist); i++) {
ent = strlist__entry(rawlist, i);
parse_trace_kprobe_event(ent->s, &group, &event, NULL);
strlist__add(sl, event);
free(group);
+ free(event);
}
strlist__delete(rawlist);
@@ -480,5 +481,6 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes)
strlist__add(namelist, event);
}
}
+ strlist__delete(namelist);
close(fd);
}