[tip:perfcounters/core] perf_counter: Fix stack corruption in perf_read_hw

[tip-bot for Marti Raudsepp]

Commit-ID:  d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39
Gitweb:     http://git.kernel.org/tip/d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39
Author:     Marti Raudsepp <marti@xxxxxxxxx>
AuthorDate: Sat, 13 Jun 2009 02:35:01 +0300
Committer:  Ingo Molnar <mingo@xxxxxxx>
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@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 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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