From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 18 Sep 2018 23:41:03 +0000 (-0400)
Subject: fix benign data race in pthread_attr_init
X-Git-Tag: v1.1.21~82
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=11ce1b133d594b6a454d3e8d5941e7a6a432c42b;p=oweals%2Fmusl.git

fix benign data race in pthread_attr_init

access to defaults should be protected against concurrent changes.
---

diff --git a/src/thread/pthread_attr_init.c b/src/thread/pthread_attr_init.c
index a962b460..398990d1 100644
--- a/src/thread/pthread_attr_init.c
+++ b/src/thread/pthread_attr_init.c
@@ -6,7 +6,9 @@ extern size_t __default_guardsize;
 int pthread_attr_init(pthread_attr_t *a)
 {
 	*a = (pthread_attr_t){0};
+	__acquire_ptc();
 	a->_a_stacksize = __default_stacksize;
 	a->_a_guardsize = __default_guardsize;
+	__release_ptc();
 	return 0;
 }