perf: Fix stack data leak

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>
git-mirror · Jul 22, 2009 · c9f73a3 · c9f73a3
1 parent 9b7019a
commit c9f73a3
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
@@ -2666,6 +2666,7 @@ static void perf_counter_output(struct perf_counter *counter, int nmi,
 		header.size += sizeof(cpu_entry);
 
 		cpu_entry.cpu = raw_smp_processor_id();
+		cpu_entry.reserved = 0;
 	}
 
 	if (sample_type & PERF_SAMPLE_PERIOD)