linux-kernel - [PATCH 3/9] perf annotate: Fix sizeof_sym

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Date:	Mon,  5 Oct 2015 20:06:03 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>, Don Zickus <dzickus@...hat.com>
Subject: [PATCH 3/9] perf annotate: Fix sizeof_sym_hist overflow issue

The annotated_source::sizeof_sym_hist could easily overflow
int size, resulting in crash in __symbol__inc_addr_samples.

Changing its type int size_t as was probably intended from
beginning based on initialization code in symbol__alloc_hist.

Link: http://lkml.kernel.org/n/tip-tf6ciz2mziuijvm25034qzcv@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/annotate.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index e9996092a093..cea323d9ee7e 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -122,7 +122,7 @@ struct annotated_source {
 	struct list_head   source;
 	struct source_line *lines;
 	int    		   nr_histograms;
-	int    		   sizeof_sym_hist;
+	size_t		   sizeof_sym_hist;
 	struct cyc_hist	   *cycles_hist;
 	struct sym_hist	   histograms[0];
 };
-- 
2.4.3

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