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perf: Fix stack data leak

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the "reserved" field was not initialized to zero, resulting in 4 bytes
of stack data leaking to userspace....

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
This commit is contained in:
Arjan van de Ven 2009-07-21 00:55:05 -07:00 committed by Peter Zijlstra
parent 9b7019ae6a
commit c9f73a3dd2
1 changed files with 1 additions and 0 deletions
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kernel/perf_counter.c
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@ -2666,6 +2666,7 @@ static void perf_counter_output(struct perf_counter *counter, int nmi,
header.size += sizeof(cpu_entry); header.size += sizeof(cpu_entry);
cpu_entry.cpu = raw_smp_processor_id(); cpu_entry.cpu = raw_smp_processor_id();
cpu_entry.reserved = 0;
} }
if (sample_type & PERF_SAMPLE_PERIOD) if (sample_type & PERF_SAMPLE_PERIOD)