From: Masami Hiramatsu <[email protected]> Make pmu_formats_string() to check return value of strbuf APIs so that it can detect errors in it.
Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/20160510054744.6158.37810.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/pmu.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index bf34468a99cb..ddb0261b2577 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -643,20 +643,20 @@ static int pmu_resolve_param_term(struct parse_events_term *term, static char *pmu_formats_string(struct list_head *formats) { struct perf_pmu_format *format; - char *str; - struct strbuf buf; + char *str = NULL; + struct strbuf buf = STRBUF_INIT; unsigned i = 0; if (!formats) return NULL; - strbuf_init(&buf, 0); /* sysfs exported terms */ list_for_each_entry(format, formats, list) - strbuf_addf(&buf, i++ ? ",%s" : "%s", - format->name); + if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) + goto error; str = strbuf_detach(&buf, NULL); +error: strbuf_release(&buf); return str; -- 2.5.5
