From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 22 May 2012 02:51:30 +0000 (-0400)
Subject: fix out-of-bounds array access in pthread barriers on 64-bit
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=9ae1cf6d292d8c24ad78d6e220186afc5076d120;hp=3db29f0347976cd8f5eedf8a78cc3297a639714f

fix out-of-bounds array access in pthread barriers on 64-bit

it's ok to overlap with integer slot 3 on 32-bit because only slots
0-2 are used on process-local barriers.
---

diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h
index 5c1b2069..2348b5da 100644
--- a/src/internal/pthread_impl.h
+++ b/src/internal/pthread_impl.h
@@ -83,7 +83,7 @@ struct __timer {
 #define _b_limit __u.__i[2]
 #define _b_count __u.__i[3]
 #define _b_waiters2 __u.__i[4]
-#define _b_inst __u.__p[4]
+#define _b_inst __u.__p[3]
 
 #include "pthread_arch.h"