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perf evsel: Fix uninitialized memory access to struct perf_sample

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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@elte.hu>
Link: http://lkml.kernel.org/r/1323966762-8574-2-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Robert Richter 2011-12-15 17:32:39 +01:00 • committed by Arnaldo Carvalho de Melo
commit f3bda2c9a6
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/evsel.c
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@ -460,7 +460,7 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
u32 val32[2]; u32 val32[2];
} u; } u;
memset(data, 0, sizeof(*data));
data->cpu = data->pid = data->tid = -1; data->cpu = data->pid = data->tid = -1;
data->stream_id = data->id = data->time = -1ULL; data->stream_id = data->id = data->time = -1ULL;