linux-kernel - [PATCH 4.4 020/210] perf tools: Fix checking asprintf return value

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Date:	Sun, 10 Apr 2016 11:34:01 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Wang Nan <wangnan0@...wei.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Cody P Schafer <dev@...yps.com>,
	He Kuang <hekuang@...wei.com>,
	Jeremie Galarneau <jeremie.galarneau@...icios.com>,
	Jiri Olsa <jolsa@...nel.org>, Kirill Smelkov <kirr@...edi.com>,
	Li Zefan <lizefan@...wei.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>, pi3orama@....com,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 4.4 020/210] perf tools: Fix checking asprintf return value

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wang Nan <wangnan0@...wei.com>

commit 26dee028d365fbc0e3326606a8520260b4462381 upstream.

According to man pages, asprintf returns -1 when failure. This patch
fixes two incorrect return value checker.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Brendan Gregg <brendan.d.gregg@...il.com>
Cc: Cody P Schafer <dev@...yps.com>
Cc: He Kuang <hekuang@...wei.com>
Cc: Jeremie Galarneau <jeremie.galarneau@...icios.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kirill Smelkov <kirr@...edi.com>
Cc: Li Zefan <lizefan@...wei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Zefan Li <lizefan@...wei.com>
Cc: pi3orama@....com
Fixes: ffeb883e5662 ("perf tools: Show proper error message for wrong terms of hw/sw events")
Link: http://lkml.kernel.org/r/1455882283-79592-5-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/perf/util/parse-events.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2101,11 +2101,11 @@ char *parse_events_formats_error_string(
 
 	/* valid terms */
 	if (additional_terms) {
-		if (!asprintf(&str, "valid terms: %s,%s",
-			      additional_terms, static_terms))
+		if (asprintf(&str, "valid terms: %s,%s",
+			     additional_terms, static_terms) < 0)
 			goto fail;
 	} else {
-		if (!asprintf(&str, "valid terms: %s", static_terms))
+		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
 			goto fail;
 	}
 	return str;