linux-kernel - [PATCH 1/4] perf tools: Fix uninitialized memory access to struct perf

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Date:	Thu, 15 Dec 2011 17:32:39 +0100
From:	Robert Richter <robert.richter@....com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
CC:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Robert Richter <robert.richter@....com>
Subject: [PATCH 1/4] perf tools: Fix uninitialized memory access to struct perf_sample

Memory in struct perf_sample is not fully initialized during parsing.
Depending on sampling data some parts may left unchanged. Zero out
struct perf_sample first to avoid access to uninitialized memory.

Signed-off-by: Robert Richter <robert.richter@....com>
---
 tools/perf/util/evsel.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4a8c8b0..ac115ba 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -457,7 +457,7 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
 		u32 val32[2];
 	} u;
 
-
+	memset(data, 0, sizeof(*data));
 	data->cpu = data->pid = data->tid = -1;
 	data->stream_id = data->id = data->time = -1ULL;
 
-- 
1.7.7


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