commit d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39
author Marti Raudsepp <marti@juffo.org> Sat Jun 13 02:35:01 2009 +0300
committer Ingo Molnar <mingo@elte.hu> Sat Jun 13 12:58:24 2009 +0200
tree e2de81cecc4b72a7ae35624672d878e4c22bb5e9
parent 87847b8f26cc7176ec9b239898dc7ce47a94e1a6

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@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/perf_counter.c

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 ssize_t
 perf_read_hw(struct perf_counter *counter, char __user *buf, size_t count)
 {
-	u64 values[3];
+	u64 values[4];
 	int n;
 
 	/*