[tip:perf/core] perf evsel: Fix uninitialized memory access to struct perf_sample

[tip-bot for Robert Richter]

Commit-ID:  f3bda2c9a689b38c059f7cb2d761ff58a2996370
Gitweb:     http://git.kernel.org/tip/f3bda2c9a689b38c059f7cb2d761ff58a2996370
Author:     Robert Richter <robert.richter@xxxxxxx>
AuthorDate: Thu, 15 Dec 2011 17:32:39 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 20 Dec 2011 13:26:47 -0200

perf evsel: 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.

Cc: Ingo Molnar <mingo@xxxxxxx>
Link: http://lkml.kernel.org/r/1323966762-8574-2-git-send-email-robert.richter@xxxxxxx
Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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 60ad028..667f3b7 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -460,7 +460,7 @@ 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;
 
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