Commit e1d2017b authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Ingo Molnar

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: default avatarMasami 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: default avatarIngo Molnar <mingo@elte.hu>
parent d56728b8
......@@ -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);
}
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