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| author |   Frederic Weisbecker <fweisbec@gmail.com> | 2011-05-21 19:33:04 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2011-05-22 03:38:36 +0200 |
| commit | a285412479b6d5af3e48273a92ec2f1987df8cd1 (patch) | |
| tree | 29f68684cebb26b86c3dd0b0f0fc4e5d6553c989 /tools/perf/util/evsel.c | |
| parent | perf tools: Move evlist sample helpers to evlist area (diff) | |
| download | linux-dev-a285412479b6d5af3e48273a92ec2f1987df8cd1.tar.xz linux-dev-a285412479b6d5af3e48273a92ec2f1987df8cd1.zip | |
perf tools: Pre-check sample size before parsing
Check that the total size of the sample fields having a fixed
size do not exceed the one of the whole event. This robustifies
the sample parsing.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index d6fd59beb860..bfce8bf642fa 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -304,7 +304,8 @@ static int perf_event__parse_id_sample(const union perf_event *event, u64 type, } int perf_event__parse_sample(const union perf_event *event, u64 type, - bool sample_id_all, struct perf_sample *data) + int sample_size, bool sample_id_all, + struct perf_sample *data) { const u64 *array; @@ -319,6 +320,9 @@ int perf_event__parse_sample(const union perf_event *event, u64 type, array = event->sample.array; + if (sample_size + sizeof(event->header) > event->header.size) + return -EFAULT; + if (type & PERF_SAMPLE_IP) { data->ip = event->ip.ip; array++; |