From f6541f75f2822252b057f08e9f5f0c40d4079a8c Mon Sep 17 00:00:00 2001
From: Roman Pen <r.peniaev@gmail.com>
Date: Sat, 23 Apr 2016 13:44:08 +0200
Subject: [PATCH] btreplay: fix memory corruption caused by CPU_ZERO_S

Size should be provided, not cpus number.

Signed-off-by: Roman Pen <r.peniaev@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: <linux-btrace@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 btreplay/btreplay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/btreplay/btreplay.c b/btreplay/btreplay.c
index 6d19564..2a1525e 100644
--- a/btreplay/btreplay.c
+++ b/btreplay/btreplay.c
@@ -550,7 +550,7 @@ static void pin_to_cpu(struct thr_info *tip)
 
 	assert(0 <= tip->cpu && tip->cpu < ncpus);
 
-	CPU_ZERO_S(ncpus, cpus);
+	CPU_ZERO_S(size, cpus);
 	CPU_SET_S(tip->cpu, size, cpus);
 	if (sched_setaffinity(getpid(), size, cpus)) {
 		fatal("sched_setaffinity", ERR_SYSCALL, "Failed to pin CPU\n");
-- 
2.25.1