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perf_events: Fix bogus copy_to_user() in perf_event_read_group()

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When using an event group, the value and id for non leaders events
were wrong due to invalid offset into the outgoing buffer.

Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: paulus@samba.org
Cc: perfmon2-devel@lists.sourceforge.net
LKML-Reference: <4b0b71e1.0508d00a.075e.ffff84a3@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Stephane Eranian 2009-11-23 21:40:49 -08:00 committed by Ingo Molnar
parent b23d5767a5
commit 184d3da8ef
1 changed files with 1 additions and 1 deletions
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2
kernel/perf_event.c
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@ -1831,7 +1831,7 @@ static int perf_event_read_group(struct perf_event *event,
size = n * sizeof(u64); size = n * sizeof(u64);
if (copy_to_user(buf + size, values, size)) { if (copy_to_user(buf + ret, values, size)) {
ret = -EFAULT; ret = -EFAULT;
goto unlock; goto unlock;
} }