From: Stephane Eranian <eranian@google.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: eranian@gmail.com, a.p.zijlstra@chello.nl, mingo@elte.hu,
paulus@samba.org, perfmon2-devel@lists.sourceforge.net
Subject: [PATCH] perf_events: fix bogus copy_to_user() in perf_event_read_group()
Date: Mon, 23 Nov 2009 17:36:20 +0100 [thread overview]
Message-ID: <bd4cb8900911230836na261658udd82f5c20630ffba@mail.gmail.com> (raw)
In-Reply-To: <4b0ab8b1.1c07d00a.4859.5f71@mx.google.com>
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>
---
perf_event.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 0b0d5f7..8306127 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1826,7 +1826,7 @@ static int perf_event_read_group(struct perf_event *event,
size = n * sizeof(u64);
- if (copy_to_user(buf + size, values, size)) {
+ if (copy_to_user(buf + ret, values, size)) {
ret = -EFAULT;
goto unlock;
}
next parent reply other threads:[~2009-11-23 16:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4b0ab8b1.1c07d00a.4859.5f71@mx.google.com>
2009-11-23 16:36 ` Stephane Eranian [this message]
2009-11-23 16:46 ` [PATCH] perf_events: fix bogus copy_to_user() in perf_event_read_group() Peter Zijlstra
2009-11-23 16:47 ` Stephane Eranian
2009-11-23 17:07 ` Ingo Molnar
2009-11-24 5:40 ` Stephane Eranian
2009-11-24 16:56 ` [tip:perf/core] perf_events: Fix " tip-bot for Stephane Eranian
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