linux-kernel - [BUG] perf tools: off-by-one error in map_groups__find

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Message-ID: <CABPqkBQPjpgD_5n0ZMmx971+YO86CO+5mSfcg7a1p4Ys_TgOUA@mail.gmail.com>
Date:	Wed, 1 Oct 2014 21:16:31 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>, David Ahern <dsahern@...il.com>
Subject: [BUG] perf tools: off-by-one error in map_groups__find_ams()

Hi,

It appears that there is a off-by-one bug in map_groups__find_ams().
The upper-bound check in the test below should be >= because
end = start + len; The end address is outside the range.

Please confirm.


int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
{
                if (ams->addr < ams->map->start || ams->addr > ams->map->end) {
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