PERF_SAMPLE_CPU contains the cpu number in the first 4 bytes and the second
4 bytes are reserved. Ensure the reserved bytes are zero in
perf_event__synthesize_sample().

Signed-off-by: Adrian Hunter <[email protected]>
---
 tools/perf/util/evsel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 8f971a2301d1..7d066e83abe8 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2523,6 +2523,7 @@ int perf_event__synthesize_sample(union perf_event 
*event, u64 type,
 
        if (type & PERF_SAMPLE_CPU) {
                u.val32[0] = sample->cpu;
+               u.val32[1] = 0;
                if (swapped) {
                        /*
                         * Inverse of what is done in perf_evsel__parse_sample
-- 
1.9.1

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