linux-kernel - [tip:perfcounters/core] perf_counter: Fix stack corruption in perf_read

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Message-ID: <tip-d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39@git.kernel.org>
Date:	Sat, 13 Jun 2009 14:49:09 GMT
From:	tip-bot for Marti Raudsepp <marti@...fo.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, paulus@...ba.org,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	efault@....de, marti@...fo.org, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perfcounters/core] perf_counter: Fix stack corruption in perf_read_hw

Commit-ID:  d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39
Gitweb:     http://git.kernel.org/tip/d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39
Author:     Marti Raudsepp <marti@...fo.org>
AuthorDate: Sat, 13 Jun 2009 02:35:01 +0300
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sat, 13 Jun 2009 12:58:24 +0200

perf_counter: Fix stack corruption in perf_read_hw

With PERF_FORMAT_ID, perf_read_hw now needs space for up to 4 values.

Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/perf_counter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 8d14a73..e914daf 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1553,7 +1553,7 @@ static int perf_release(struct inode *inode, struct file *file)
 static ssize_t
 perf_read_hw(struct perf_counter *counter, char __user *buf, size_t count)
 {
-	u64 values[3];
+	u64 values[4];
 	int n;
 
 	/*
--
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